<?xml version="1.0" encoding="ASCII"?>
<!-- XBRL document created with Praxa -->
<!-- Copyright (c) 2026 Praxa LLC. All Rights Reserved.-->
<!-- Creation Date: 2026-08-06T17:28:01.8914+00:00 -->
<xs:schema targetNamespace="http://solidiontech.com/20260630" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sti="http://solidiontech.com/20260630" xmlns:us-gaap="http://fasb.org/us-gaap/2026" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dei="http://xbrl.sec.gov/dei/2026" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:dtr="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:srt="http://fasb.org/srt/2026" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:ecd-sub="http://xbrl.sec.gov/ecd-sub/2026">
  <xs:import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd" />
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xs:import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd" />
  <xs:import namespace="http://xbrl.org/2020/extensible-enumerations-2.0" schemaLocation="https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/ecd-sub/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-sub-2026.xsd" />
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sti-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation link" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sti-20260630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label link" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sti-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:title="Definition link" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="sti-20260630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:title="Calculation link" xlink:type="simple" />
      <link:roleType roleURI="http://solidiontech.com/20260630/role/Cover" id="Cover">
        <link:definition>995300 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CondensedConsolidatedBalanceSheetsUnaudited" id="CondensedConsolidatedBalanceSheetsUnaudited">
        <link:definition>995301 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CondensedConsolidatedBalanceSheetsUnauditedParentheticals" id="CondensedConsolidatedBalanceSheetsUnauditedParentheticals">
        <link:definition>995302 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CondensedConsolidatedStatementsofOperationsUnaudited" id="CondensedConsolidatedStatementsofOperationsUnaudited">
        <link:definition>995303 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityDeficitUnaudited" id="CondensedConsolidatedStatementsofChangesinStockholdersEquityDeficitUnaudited">
        <link:definition>995304 - Statement - Condensed Consolidated Statements of Changes in Stockholders&#8217; Equity (Deficit) (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" id="CondensedConsolidatedStatementsofCashFlowsUnaudited">
        <link:definition>995305 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/DescriptionofOrganizationBusinessOperationsandGoingConcern" id="DescriptionofOrganizationBusinessOperationsandGoingConcern">
        <link:definition>995306 - Disclosure - Description of Organization, Business Operations and Going Concern</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatements" id="CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatements">
        <link:definition>995307 - Disclosure - Correction of Errors in Previously Reported Consolidated Financial Statements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SummaryofSignificantAccountingPolicies" id="SummaryofSignificantAccountingPolicies">
        <link:definition>995308 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/Recapitalization" id="Recapitalization">
        <link:definition>995309 - Disclosure - Recapitalization</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/RelatedParties" id="RelatedParties">
        <link:definition>995310 - Disclosure - Related Parties</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CommitmentsandContingencies" id="CommitmentsandContingencies">
        <link:definition>995311 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/StockholdersEquityDeficit" id="StockholdersEquityDeficit">
        <link:definition>995312 - Disclosure - Stockholders&#8217; Equity (Deficit)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/Warrants" id="Warrants">
        <link:definition>995313 - Disclosure - Warrants</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/ForwardPurchaseAgreementandPrivatePlacementFinancing" id="ForwardPurchaseAgreementandPrivatePlacementFinancing">
        <link:definition>995314 - Disclosure - Forward Purchase Agreement and Private Placement Financing</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/Debt" id="Debt">
        <link:definition>995315 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/IncomeTaxes" id="IncomeTaxes">
        <link:definition>995316 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/StockBasedCompensation" id="StockBasedCompensation">
        <link:definition>995317 - Disclosure - Stock-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/FairValueMeasurements" id="FairValueMeasurements">
        <link:definition>995318 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SubsequentEvents" id="SubsequentEvents">
        <link:definition>995319 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/AccountingPoliciesbyPolicyPolicies" id="AccountingPoliciesbyPolicyPolicies">
        <link:definition>996320 - Disclosure - Accounting Policies, by Policy (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsTables" id="CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsTables">
        <link:definition>996321 - Disclosure - Correction of Errors in Previously Reported Consolidated Financial Statements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SummaryofSignificantAccountingPoliciesTables" id="SummaryofSignificantAccountingPoliciesTables">
        <link:definition>996322 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/StockBasedCompensationTables" id="StockBasedCompensationTables">
        <link:definition>996323 - Disclosure - Stock-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/FairValueMeasurementsTables" id="FairValueMeasurementsTables">
        <link:definition>996324 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SubsequentEventsTables" id="SubsequentEventsTables">
        <link:definition>996325 - Disclosure - Subsequent Events (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/DescriptionofOrganizationBusinessOperationsandGoingConcernDetails" id="DescriptionofOrganizationBusinessOperationsandGoingConcernDetails">
        <link:definition>996326 - Disclosure - Description of Organization, Business Operations and Going Concern (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsDetails" id="CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsDetails">
        <link:definition>996327 - Disclosure - Correction of Errors in Previously Reported Consolidated Financial Statements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsScheduleofImpactonStockholdersEquityDetails" id="CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsScheduleofImpactonStockholdersEquityDetails">
        <link:definition>996328 - Disclosure - Correction of Errors in Previously Reported Consolidated Financial Statements - Schedule of Impact on Stockholders&#8217; Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SummaryofSignificantAccountingPoliciesDetails" id="SummaryofSignificantAccountingPoliciesDetails">
        <link:definition>996329 - Disclosure - Summary of Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SummaryofSignificantAccountingPoliciesScheduleofPropertyandEquipmentEstimatedUsefulLivesDetails" id="SummaryofSignificantAccountingPoliciesScheduleofPropertyandEquipmentEstimatedUsefulLivesDetails">
        <link:definition>996330 - Disclosure - Summary of Significant Accounting Policies - Schedule of Property and Equipment Estimated Useful Lives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SummaryofSignificantAccountingPoliciesScheduleofPropertyandEquipmentDetails" id="SummaryofSignificantAccountingPoliciesScheduleofPropertyandEquipmentDetails">
        <link:definition>996331 - Disclosure - Summary of Significant Accounting Policies - Schedule of Property and Equipment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SummaryofSignificantAccountingPoliciesScheduleofIntangibleAssetsDetails" id="SummaryofSignificantAccountingPoliciesScheduleofIntangibleAssetsDetails">
        <link:definition>996332 - Disclosure - Summary of Significant Accounting Policies - Schedule of Intangible Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SummaryofSignificantAccountingPoliciesScheduleofPotentiallyDilutiveCommonStockEquivalentsDetails" id="SummaryofSignificantAccountingPoliciesScheduleofPotentiallyDilutiveCommonStockEquivalentsDetails">
        <link:definition>996333 - Disclosure - Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Common Stock Equivalents (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/RecapitalizationDetails" id="RecapitalizationDetails">
        <link:definition>996334 - Disclosure - Recapitalization (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/RelatedPartiesDetails" id="RelatedPartiesDetails">
        <link:definition>996335 - Disclosure - Related Parties (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/CommitmentsandContingenciesDetails" id="CommitmentsandContingenciesDetails">
        <link:definition>996336 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/StockholdersEquityDeficitDetails" id="StockholdersEquityDeficitDetails">
        <link:definition>996337 - Disclosure - Stockholders&#8217; Equity (Deficit) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/WarrantsDetails" id="WarrantsDetails">
        <link:definition>996338 - Disclosure - Warrants (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/ForwardPurchaseAgreementandPrivatePlacementFinancingDetails" id="ForwardPurchaseAgreementandPrivatePlacementFinancingDetails">
        <link:definition>996339 - Disclosure - Forward Purchase Agreement and Private Placement Financing (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/DebtDetails" id="DebtDetails">
        <link:definition>996340 - Disclosure - Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/IncomeTaxesDetails" id="IncomeTaxesDetails">
        <link:definition>996341 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/StockBasedCompensationDetails" id="StockBasedCompensationDetails">
        <link:definition>996342 - Disclosure - Stock-Based Compensation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/StockBasedCompensationScheduleofRSUActivityDetails" id="StockBasedCompensationScheduleofRSUActivityDetails">
        <link:definition>996343 - Disclosure - Stock-Based Compensation - Schedule of RSU Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/StockBasedCompensationScheduleofAwardswithMarketBasedConditionsDetails" id="StockBasedCompensationScheduleofAwardswithMarketBasedConditionsDetails">
        <link:definition>996344 - Disclosure - Stock-Based Compensation - Schedule of Awards with Market-Based Conditions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/FairValueMeasurementsDetails" id="FairValueMeasurementsDetails">
        <link:definition>996345 - Disclosure - Fair Value Measurements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/FairValueMeasurementsScheduleofCompanysLiabilitiesthatareMeasuredatFairValueDetails" id="FairValueMeasurementsScheduleofCompanysLiabilitiesthatareMeasuredatFairValueDetails">
        <link:definition>996346 - Disclosure - Fair Value Measurements - Schedule of Company&#8217;s Liabilities that are Measured at Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/FairValueMeasurementsScheduleofFairValueMeasurementoftheFPADetails" id="FairValueMeasurementsScheduleofFairValueMeasurementoftheFPADetails">
        <link:definition>996347 - Disclosure - Fair Value Measurements - Schedule of Fair Value Measurement of the FPA (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/FairValueMeasurementsScheduleofDeterminetheFairValueDetails" id="FairValueMeasurementsScheduleofDeterminetheFairValueDetails">
        <link:definition>996348 - Disclosure - Fair Value Measurements - Schedule of Determine the Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/FairValueMeasurementsScheduleofRecurringBasisUsingSignificantUnobservableInputsLevel3Details" id="FairValueMeasurementsScheduleofRecurringBasisUsingSignificantUnobservableInputsLevel3Details">
        <link:definition>996349 - Disclosure - Fair Value Measurements - Schedule of Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SubsequentEventsDetails" id="SubsequentEventsDetails">
        <link:definition>996350 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://solidiontech.com/20260630/role/SubsequentEventsScheduleofSubleaseRentDetails" id="SubsequentEventsScheduleofSubleaseRentDetails">
        <link:definition>996351 - Disclosure - Subsequent Events - Schedule of Sublease Rent (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="sti_AdditionalIssuanceOfCommonStock" name="AdditionalIssuanceOfCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_DescriptionofOrganizationBusinessOperationsandGoingConcernDetailsTable" name="DescriptionofOrganizationBusinessOperationsandGoingConcernDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_HBCHoldbackSharesMember" name="HBCHoldbackSharesMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_MergerAgreementDescription" name="MergerAgreementDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_MergerAgreementMember" name="MergerAgreementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_NetOfPlacementAgentFeesAndOfferingExpenses" name="NetOfPlacementAgentFeesAndOfferingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_NumberOfHoldBackShares" name="NumberOfHoldBackShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_PreFundedWarrantsMember" name="PreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_PurchaseOfShares" name="PurchaseOfShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsDetailsTable" name="CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_PreFundedWarrantsConsideration" name="PreFundedWarrantsConsideration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_CorrectionOfPriorperiodErrorFPASubscriptionReceivableDiscount" name="CorrectionOfPriorperiodErrorFPASubscriptionReceivableDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesAbstract" name="ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SummaryofSignificantAccountingPoliciesScheduleofPropertyandEquipmentEstimatedUsefulLivesDetailsTable" name="SummaryofSignificantAccountingPoliciesScheduleofPropertyandEquipmentEstimatedUsefulLivesDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_IssuanceOfCommonStockForForwardPurchaseAgreement" name="IssuanceOfCommonStockForForwardPurchaseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_RestatedMember" name="RestatedMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_NetUnissuedPatents" name="NetUnissuedPatents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_PercentageOfNumberOfStocksOfCommonStockOutstanding" name="PercentageOfNumberOfStocksOfCommonStockOutstanding" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_SummaryofSignificantAccountingPoliciesDetailsTable" name="SummaryofSignificantAccountingPoliciesDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_TaxLienMember" name="TaxLienMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_TerminationAgreementMember" name="TerminationAgreementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_AnsonInvestmentsMasterFundLPAnsonMember" name="AnsonInvestmentsMasterFundLPAnsonMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_IPOWarrantsMember" name="IPOWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SeriesCWarrantsMember" name="SeriesCWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SeriesBWarrantsMember" name="SeriesBWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SeriesAAndBWarrantsMember" name="SeriesAAndBWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_WarrantsSeriesCAndDMember" name="WarrantsSeriesCAndDMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_PlacementAgentWarrantsMember" name="PlacementAgentWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_AccruedInterest" name="AccruedInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_AccruedInterestRate" name="AccruedInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_TwoThousandTwentySixPrivatePlacementMember" name="TwoThousandTwentySixPrivatePlacementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_PercentageOfSharesOwnedByHolder" name="PercentageOfSharesOwnedByHolder" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_PercentageOfOutstandingCommonStock" name="PercentageOfOutstandingCommonStock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_PercentageOfPurchasePricePerShare" name="PercentageOfPurchasePricePerShare" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_NumberOfDaysSubjectToLockUp" name="NumberOfDaysSubjectToLockUp" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_GrantdateFairValue" name="GrantdateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_ExpireDate" name="ExpireDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_WarrantsSeriesDMember" name="WarrantsSeriesDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ArborLakeStrategicCooperationConsultingAgreementMember" name="ArborLakeStrategicCooperationConsultingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_G3HoldbackSharesMember" name="G3HoldbackSharesMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_PrivateWarrantsMember" name="PrivateWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SeriesDWarrantsMember" name="SeriesDWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SeriesAWarrantsMember" name="SeriesAWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_AugustPrivatePlacementMember" name="AugustPrivatePlacementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_HoldbackSharesNotBeIssued" name="HoldbackSharesNotBeIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_PromissoryNoteMember" name="PromissoryNoteMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_DBoralCapitalLLCMember" name="DBoralCapitalLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount" name="AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_NumberOfPurchasedCommonStock" name="NumberOfPurchasedCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_CommitmentsandContingenciesDetailsTable" name="CommitmentsandContingenciesDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_WarrantsPrivateMember" name="WarrantsPrivateMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_HBCEarnoutSharesMember" name="HBCEarnoutSharesMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ScheduleOfPotentiallyDilutiveCommonStockEquivalentsAbstract" name="ScheduleOfPotentiallyDilutiveCommonStockEquivalentsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_FiniteLivedIntangibleAssetsIssuedPatentsNet" name="FiniteLivedIntangibleAssetsIssuedPatentsNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_TransactionCosts" name="TransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_ServicesOrEmployeeCostsOwed" name="ServicesOrEmployeeCostsOwed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_CashForWorkingCapital" name="CashForWorkingCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_RecapitalizationDetailsTable" name="RecapitalizationDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_BeneschFriedlanderCoplanAronoffLLPMember" name="BeneschFriedlanderCoplanAronoffLLPMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_NetProceeds" name="NetProceeds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_WarrantsToPurchaseShares" name="WarrantsToPurchaseShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_PercentageOfGrossProceeds" name="PercentageOfGrossProceeds" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_PercentageOfTotalSecuritiesSold" name="PercentageOfTotalSecuritiesSold" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_CashOfferingCosts" name="CashOfferingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_GrantDateFairValuePlacementAgentWarrants" name="GrantDateFairValuePlacementAgentWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_PercentageOfCommonStock" name="PercentageOfCommonStock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_RemainedOutstanding" name="RemainedOutstanding" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_WarrantSeriesAMember" name="WarrantSeriesAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_PercentageOfCashBonus" name="PercentageOfCashBonus" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_FairValueMeasurementsDetailsTable" name="FairValueMeasurementsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ForwardPurchaseAgreementMember" name="ForwardPurchaseAgreementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_PurchaseOfInitialPrice" name="PurchaseOfInitialPrice" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ReimbursementConsiderationShares" name="ReimbursementConsiderationShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_FPAShareMember" name="FPAShareMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingDetailsTable" name="ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_MonteCarloMember" name="MonteCarloMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ScheduleOfCompanySLiabilitiesThatAreMeasuredAtFairValueAbstract" name="ScheduleOfCompanySLiabilitiesThatAreMeasuredAtFairValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue" type="dtr:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_WarrantsMember" name="WarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SeriesCMember" name="SeriesCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SeriesDMember" name="SeriesDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_FairValueMeasurementRequired" name="FairValueMeasurementRequired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_SeriesCAndDWarrantsMember" name="SeriesCAndDWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SharesIssuedUponSettlementOfWarrantsShares" name="SharesIssuedUponSettlementOfWarrantsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_SharesIssuedUponSettlementOfWarrants" name="SharesIssuedUponSettlementOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_StockBasedCompensationDetailsTable" name="StockBasedCompensationDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_StockIssuedDuringPeriodSharesIssuedFromWarrantConversioninShares" name="StockIssuedDuringPeriodSharesIssuedFromWarrantConversioninShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_StockIssuedDuringPeriodValueForwardPurchaseAgreementSubscriptionReceivableDiscount" name="StockIssuedDuringPeriodValueForwardPurchaseAgreementSubscriptionReceivableDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_StockIssuedDuringPeriodSharesReverseStockSplit" name="StockIssuedDuringPeriodSharesReverseStockSplit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_UnrestrictedCommonStockAwardsMember" name="UnrestrictedCommonStockAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_BearingInterestPercentage" name="BearingInterestPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_UndiscountedFutureMinimumBaseRentPayments" name="UndiscountedFutureMinimumBaseRentPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_PerRentableSquareFoot" name="PerRentableSquareFoot" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_ScheduleOfAwardsWithMarketBasedConditionsAbstract" name="ScheduleOfAwardsWithMarketBasedConditionsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ScheduleOfRsuActivityAbstract" name="ScheduleOfRsuActivityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_RecycledSharesRelatedToTheFPA" name="RecycledSharesRelatedToTheFPA" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_DebtDiscountRecognizedOnNotePayable" name="DebtDiscountRecognizedOnNotePayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_CapitalizedInterestToPrincipalBalanceOfShorttermNotePayable" name="CapitalizedInterestToPrincipalBalanceOfShorttermNotePayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_SharesIssuableUponSettlementOfWarrants" name="SharesIssuableUponSettlementOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_RecapitalizationTextBlock" name="RecapitalizationTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_WarrantsTextBlock" name="WarrantsTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_IncreaseDecreaseInExciseTaxes" name="IncreaseDecreaseInExciseTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_ReverseStockSplitPolicyTextBlock" name="ReverseStockSplitPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ForwardPurchaseAgreementAndNonRedemptionAgreementPolicyTextBlock" name="ForwardPurchaseAgreementAndNonRedemptionAgreementPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_EquityLinkedInstrumentsPolicyTextBlock" name="EquityLinkedInstrumentsPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_PatentsPolicyTextBlock" name="PatentsPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_FPADiscountAccretion" name="FPADiscountAccretion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_ReverseStockSplitReclassificationFromCommonStockToAdditionalPaidinCapital" name="ReverseStockSplitReclassificationFromCommonStockToAdditionalPaidinCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_WarrantsPolicyTextBlock" name="WarrantsPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesTableTextBlock" name="ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesTableTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_EmergingGrowthCompanyPolicyTextBlock" name="EmergingGrowthCompanyPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_CashUsedToSettleFractionalShares" name="CashUsedToSettleFractionalShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_ScheduleOfFairValueAssumptionsOfWarrantsTableTextBlock" name="ScheduleOfFairValueAssumptionsOfWarrantsTableTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ScheduleOfPropertyAndEquipmentAbstract" name="ScheduleOfPropertyAndEquipmentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_TwoThousandTwentyThreeEquityIncentivePlanMember" name="TwoThousandTwentyThreeEquityIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ScheduleOfRevisedThePreviouslyIssuedInterimBalanceSheetsAbstract" name="ScheduleOfRevisedThePreviouslyIssuedInterimBalanceSheetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_StockSubscriptionReceivableMember" name="StockSubscriptionReceivableMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_GlobalGrapheneGroupMember" name="GlobalGrapheneGroupMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_EquityIncentivePlanMember" name="EquityIncentivePlanMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_CommonStockSharesCancelled" name="CommonStockSharesCancelled" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ReverseStockSplitMember" name="ReverseStockSplitMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_UnpaidFederalIncomeTaxBalanceOwed" name="UnpaidFederalIncomeTaxBalanceOwed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_StockholdersEquityDeficitDetailsTable" name="StockholdersEquityDeficitDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights" name="ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights" type="dtr:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsStockPriceTrigger" name="ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsStockPriceTrigger" type="dtr:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ClassOfWarrantsSharesExercised" name="ClassOfWarrantsSharesExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_UnitsIssuedDuringPeriodSharesPrefundUnits" name="UnitsIssuedDuringPeriodSharesPrefundUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_WarrantsDetailsTable" name="WarrantsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_WarrantsRemainedOutstanding" name="WarrantsRemainedOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_OutstandingStockholderPercentage" name="OutstandingStockholderPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_StockbasedCompensationWarrantsMember" name="StockbasedCompensationWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_WarrantsSeriesAMember" name="WarrantsSeriesAMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_WarrantsPublicMember" name="WarrantsPublicMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_MarchPrivatePlacementMember" name="MarchPrivatePlacementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_WarrantsPriorNoticePeriodDays" name="WarrantsPriorNoticePeriodDays" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsThresholdConsecutiveTradingDays" name="ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsThresholdConsecutiveTradingDays" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_NumberOfTradingDays" name="NumberOfTradingDays" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_CommonStockIssuedUponExerciseOfWarrant" name="CommonStockIssuedUponExerciseOfWarrant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_NumberOfRatioWarrantsShare" name="NumberOfRatioWarrantsShare" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_RelatedPartiesDetailsTable" name="RelatedPartiesDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_NumberOfWarrantsIssued" name="NumberOfWarrantsIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_NumberOfFloorPrice" name="NumberOfFloorPrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_IssuedPatentsAbstract" name="IssuedPatentsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_FiniteLivedIntangibleAssetsPatentsPendingnotAmortized" name="FiniteLivedIntangibleAssetsPatentsPendingnotAmortized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_PrivatePlacementWarrantsMember" name="PrivatePlacementWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_HoldbackSharesMember" name="HoldbackSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_WarrantsSeriesCMember" name="WarrantsSeriesCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ForwardPurchaseInvestorsMember" name="ForwardPurchaseInvestorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_AwardsWithMarketBasedConditionsMember" name="AwardsWithMarketBasedConditionsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_StockBasedCompensationScheduleofAwardswithMarketBasedConditionsDetailsTable" name="StockBasedCompensationScheduleofAwardswithMarketBasedConditionsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_DebtDetailsTable" name="DebtDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_StockIssuedDuringPeriodValueDiscountonShortTermNotesPayable" name="StockIssuedDuringPeriodValueDiscountonShortTermNotesPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_DerivativesMember" name="DerivativesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_AccruedUnpaidInterest" name="AccruedUnpaidInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_ScheduleOfRecurringBasisUsingSignificantUnobservableInputsLevel3Abstract" name="ScheduleOfRecurringBasisUsingSignificantUnobservableInputsLevel3Abstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_RentableSquareFeet" name="RentableSquareFeet" type="dtr-types:areaItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_FairValueMeasurementsScheduleofDeterminetheFairValueDetailsTable" name="FairValueMeasurementsScheduleofDeterminetheFairValueDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_StockBasedCompensationScheduleofRSUActivityDetailsTable" name="StockBasedCompensationScheduleofRSUActivityDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ScheduleOfFairValueMeasurementOfTheFpaAbstract" name="ScheduleOfFairValueMeasurementOfTheFpaAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ScheduleOfDetermineTheFairValueAbstract" name="ScheduleOfDetermineTheFairValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SharesOutstandingPercentage" name="SharesOutstandingPercentage" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_PrepaymentShortfallForPurchaseAgreement" name="PrepaymentShortfallForPurchaseAgreement" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_CashPayment" name="CashPayment" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_StockIssuedDuringPeriodValueStockSubscriptionReceivable" name="StockIssuedDuringPeriodValueStockSubscriptionReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_AccretedDiscountAmount" name="AccretedDiscountAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_ConvertibleNotesMember" name="ConvertibleNotesMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_EFHuttonMember" name="EFHuttonMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_GreatPointCapitalLLCMember" name="GreatPointCapitalLLCMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ConvertibleNoteSharesOfRemainedOutstanding" name="ConvertibleNoteSharesOfRemainedOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="sti_ShortTermNotesPayableRelatedParty" name="ShortTermNotesPayableRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_FairValueMeasurementsScheduleofCompanysLiabilitiesthatareMeasuredatFairValueDetailsTable" name="FairValueMeasurementsScheduleofCompanysLiabilitiesthatareMeasuredatFairValueDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_LocationStatementOfIncomeAxis" name="LocationStatementOfIncomeAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_LocationStatementOfIncomeDomain" name="LocationStatementOfIncomeDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SellingGeneralAndAdministrativeExpenseMember" name="SellingGeneralAndAdministrativeExpenseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_OperatingExpensesMember" name="OperatingExpensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ResearchAndDevelopmentExpensesMember" name="ResearchAndDevelopmentExpensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_AccruedInterestOnShortTermNotePayableRelatedParty" name="AccruedInterestOnShortTermNotePayableRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="sti_ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingTextBlock" name="ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ScheduleOfSubleasePaymentsTableTextBlock" name="ScheduleOfSubleasePaymentsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_LeasesRentExpenseSubleaseRentals" name="LeasesRentExpenseSubleaseRentals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_SubleaseAnnualRate" name="SubleaseAnnualRate" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="sti_ScheduleOfSubleaseRentTable" name="ScheduleOfSubleaseRentTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_ScheduleOfSubleaseRentLineItems" name="ScheduleOfSubleaseRentLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SubleaseFiveMonthPeriodMember" name="SubleaseFiveMonthPeriodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SubleaseTwoThousandTwentySixPeriodMember" name="SubleaseTwoThousandTwentySixPeriodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SubleaseTwoThousandTwentySevenPeriodMember" name="SubleaseTwoThousandTwentySevenPeriodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SubleaseTwoThousandTwentyEightPeriodMember" name="SubleaseTwoThousandTwentyEightPeriodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_SubleaseTwoThousandTwentyNinePeriodMember" name="SubleaseTwoThousandTwentyNinePeriodMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="sti_IssuanceOfStockPurchaseWarrants" name="IssuanceOfStockPurchaseWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_IssuanceOfPromissoryNoteInSettlementOfDueToRelatedParty" name="IssuanceOfPromissoryNoteInSettlementOfDueToRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="sti_ReclassificationOfWarrantDerivativeLiabilityToAdditionalPaidinCapitalUponExerciseOfSeriesAWarrants" name="ReclassificationOfWarrantDerivativeLiabilityToAdditionalPaidinCapitalUponExerciseOfSeriesAWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
</xs:schema>
