Polymers For Advanced Lithium Batteries(劳伦斯伯克利国家实验室材料2011).docx

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1、PolymersForAdvancedLithiumBatteriesNitashP.BalsaraLawrenceBerkeleyNationalLabMay12,2011ProjectID#ES088Thispresentationdoesnotcontainanyproprietary,confidential,orotherwiserestrictedinformationOverviewTimelineBarriers•FY08•Energydensity•FY11•Safety•65%•LowcyclelifeBudget•FY10funding:390

2、K•FY11funding:550K•NocontractorsPartners•Lead:LBNL2MilestonesMonth-YearMilestoneMar-11Electrochemicalcharacterizationofblockcopolymerelectrolytes.Partiallyaccomplished.June-11Synthesisofabinderthatconductselectronsandions.AccomplishedSept-11Synthesisofnanoporousblockcopolymerseparator

3、s.Accomplished.Allgodecisions.Noshowstoppers.ObjectiveCurrentlithiumbatteriesuseapolymericbinder(inactiveglueincathode)andapolymericseparator(expensiveinactivepolyolefinwithpores).Objective:ComprehensiveoverhaulofthewaypolymersareusedinlithiumbatteriesSpecificObjectives:1.Characterizat

4、ionofdrynanostructuredpolymericseparatorsforstabilizingthelithiummetalanode(95%complete).2.Synthesisandcharacterizationofapolymericbinderthatconductsbothionsandelectrons(50%complete).3.Synthesisandcharacterizationoftemplatednanoporousseparators(50%complete).Approach•Synthesizeblockcopo

5、lymers•Studymorphologyandionandelectrontransport•BuildandtestfullcellsNanostructuredsolidElectron-andion-NanoporousseparatorelectrolyteconductingbinderH2H2OCCyHs-BuCHxCH2Salt,LiTFSIFFFOOFFSN-SFOLi+OTechnicalAccomplishmentsNanostructuredsolidelectrolytesoftphaseconductsionshardphasepre

6、ventsdendriteformationSymmetriclithium-polymer-lithiumcellexperimentsTechnicalAccomplishmentsNanostructuredsolidelectrolyteMeasurementofdiffusioncoefficientbyrestricteddiffusion.TechnicalAccomplishmentsNanostructuredsolidelectrolyteSignalresolvedoverordersofmagnitude.TechnicalAccomplis

7、hmentsNanostructuredsolidelectrolyteVaryingsamplethicknessAveragediffusioncoefficientandwidthsofdiffusioncoefficientdistributionfunctionsaredetermined.TechnicalAccomplishmentsNanostructuredsolidelectrolyte•Systemcharacterizedbyarangeofdiffusioncoefficients.•Probablytrueforallheteroge