2009动力锂离子电池技术及产业发展国际论坛ppt课件

CollegeofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnologyDr.ShaoruiSunProf.DingguoXia2009/10/17,Insertion/De-insertionProcessesandRatePropertiesforLiFePO4,1,2,SearchingforsuchLi1-FePO4andLiFePO4single-phaseregions,Srinivasan,VtakingintoaccountboththediffusionofLithroughtheshellandthemovementofthephaseboundary,andraisingthequestionofpartialsolidsolutiondomainsthatareboundtoexist.Delacourtreportedtheexistenceofsolidsolutionsatelevatedtemperatures.Yamadasuggestedthatsolidsolutionscouldexistatroomtemperature.,3,4,Room-temperaturemiscibilitygapinLixFePO4,naturematerialsVOL5/MAY,theshellshouldbeomposedofLiFePO4onchargingandLi1FePO4ondischarging.,5,naturematerialsVOL7AUGUST,C.DELMAS1*,M.MACCARIO1,L.CROGUENNEC1,F.LECRAS2ANDF.WEILL1,6,7,8,9,BatterymaterialsforultrafastcharginganddischargingByoungwooKang1,12,Fig.1:(b)thestructureofLi0.75FePO4,inwhichthesquareisthevacancy;,13,Fig.1:(c)thestructureofLi0.50FePO4,14,Fig.1:(d)thestructureofLi0.25FePO4,15,Fig.3:TheDOS(DensityofState)of(a)LiFePO4;,16,Fig.3:TheDOS(DensityofState)of(a)LiFePO4;(b)Li0.75FePO4;(c)Li0.50FePO4;(d)Li0.25FePO4;(e)FePO4.,17,Fig.2:ThelithiumconcentrationdependenceofE,18,Fig.3ThelithiumconcentrationdependenceoftheFermilevel.,19,20,Fig.6(a)theformingoftheelectronpotentialwellinthemediumregionandthelithiuminsertionmodel