（美国阿贡高能量正极2011）New_High_Energy_Gradient_Concentration_Cathode_Material.pdf

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1、NewHighEnergyGradientConcentrationCathodeMaterialK.Amine(PI)G.Koenig,I.Belharouak,Y.K.SunArgonneNationalLaboratoryDOEmeritreviewProjectID:ES016May9-13,2011Thispresentationdoesnotcontainanyproprietary,confidential,orotherwiserestrictedinformation.OverviewTimelineBarriersStar

2、t-October1st,2008.BarriersaddressedFinish-September30,2014.–Veryhighenergy50%Completed–Longcalendarandcyclelife–ExcellentabusetoleranceBudgetPartners•Totalprojectfunding•HanyangUniversity–DOEshare:900K•ECPRO,–FY11:300K•TODA–FY10:300K–FY09:300KObjectivesoftheworkDevelopan

3、ewhighenergycathodematerialforPHEVapplicationsthatprovides:Over200mAh/gcapacityGoodratecapabilityExcellentcycleandcalendarlifeGoodabusetoleranceApproachNi0.8Co0.2CoreNi0.5Mn0.5Shell-12204.3VcutoffSurfaceb20-1Li[NiCoMn]O0.80.10.12200Li[NiCoMn]O150.640.180.182Li[NiCoMn]O0.

4、460.230.312Center18010160Li[NiCoMn]O50.80.10.12Li[NiCoMn]OHeatFlow/Wg1400.640.180.182Li[NiCoMn]O0.460.230.3120Dischargecapacity/mAhg01020304050100150200250300350oCyclingnumberTemperature/CPreviousresearchhasdemonstratedacoreenrichedinNiforhighcapacityandashellenrichedinMnfor

5、improvedsafetyandcyclelife.Approach(Continued)•Developgeneralsyntheticmethodtotailortheinternalcompositiongradientincathodeparticles.•Depositagradualcompositiongradientthroughoutparticlestosuppressstressduringlithiumintercalationanddiffusion.•FurtherenrichmaterialsinMnatthes

6、urfacetoenhancestabilityandsafety.MnNiNiMnFY2011Plans&ScheduleDevelopamodeltopredeterminethegradientinconcentrationinparticlesproducedinthecoprecipitationprocess(Sep2011)Developaprocessforprecursorswithagradientintransitionmetalcompositionthatwasenrichedinmanganese(Sep

7、.2011)Demonstrateinaproof-of-principleexperimentthatprecursorscouldbesynthesizedwithpredeterminedcompositionalprofiles(Sep.2011)Demonstratehighcapacityinfinalmaterialsproducedusingthegradientprecursors(Sep.2011)Demonstratethatatailoredrelativetransitionmetalcompositionatt

8、hesurfacesofgradientparticlesinfluencessafetyandcyclelife(Sep.2011)RecentAc