MCMB颗粒度分布对锂离子电池

:1999207208;:1999211220:(19452),,,,:100728827(1999)0420068204MCMB,,,,(,300381):MCMB,11.12Lm24.81Lm,86.2%90.5%,,,,,7:3MCMB:;;:TQ127.1+1:A1,,,(LiCoO2),,2(MCMB)(),[1]MCMB22.1MCMBMCMB200,,,2.2(PVDF)öN(NMP),,;LiCoO22.3PEöPPICR1865018650,1molLiPF6öPC+EC+DEC,Arbin0.2C,1A1A4.1V2.75V3MCMB1,ABCDE11.12Lm,14.80Lm,17.42Lm,20.94Lm24.81Lm1,11.21Lm24.81Lm,86.2%199912NEWCORBONMATERIALSDec.1999144Vol.14No.4©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1MCMBFig.1ParticlesizedistributionofMCMB90.5%,217mAh147mAh,,,,,,(SEI),,,,MCMB1Table1FirstCharge2DischargeResultNumber1stchargecapacityQömAh1stdischargecapacityQömAhirreversiblecapacityQömAhefficiencyGö%A1567135021786.2B1532133020286.8C1528134718188.2D1551138416789.2E1555140814790.52MCMBFig.2CyclelifeofbatterywithvariousparticlesizeofMCMB2,,,[2],,,,,,,964:MCMB©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,MCMB3Fig.3Tapdensityvs.fractionoflargeparticle4ICR18650(1500mAh)Fig.4CyclelifeofICR18650Battery(1500mAh),7:3MCMB(3),,,,(1500mAh)ICR18650,(4)4MCMB,,,,7:3MCMB[1]MabuchiA,TokumitsuK,FujimotoH,etal.Charge2dischargecharacteristicofthemesocarbonmi2crobeadsheat2treatedatdifferenttemperture[J].JElectrochemicalSocety1995,142(4):1041.[2]NaragananSR,SurampudiS,HalpertG.Electro2chemicalimpedancespectroscopyandinvestigationofinterfacialprocessesinlithiumrechargeablecells[A].BroadbeadJ,FarleyM.7thinternationalmeetingonlithiumbatteries,extendedabstract[C].Boston,Ma,USA.1994,32.0714©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.PARTICLESIZEEFFECTOFMCMBONTHEPERFORMANCEOFLITHIUMIONBATTERIESZHANGZe2bo,WANGBo2jiang,LIUXiu2sheng,YANGQing2xin,ZHANGChun2yan(Tianjininstituteofpowersources,Tianjin300381,China)ASTRACT:AstudyhasbeenmadeofparticlesizeeffectofMCMBontheperformanceoflithiumionbatteries.Resultsindicatedthatthefirstcharge2dischargeefficiencyincreasedfrom86.2%to90.5%whentheparticlesizeincreasedfrom11.2Lmto24.8Lmi.e.,thelargertheparticlesize,thehigherthedischargecapacity.Onthecontrary,thecyclelifewasslightlypoorforlargeparticlesize.Furtherinvestigationshowedwhenweightratiooflargeparticletosmallparticleisnearly7:3inparticlesizedistribution,thebatteryhasthehigherdischargecapacitycapacityandlongcyclelife.KEYWORDS:Lithiumionbattery;Particlesizedistribution;CyclelifeAuthorIntroduction:ZHANGZe2bo(19452),male,SeniorEngineer,engagedintheresearchanddevelopmentoflithiumionbatteries.174:MCMB©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.