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1、CapacityFadeMechanismsandSideReactionsinLithium-IonBatteries锂离子电池容量衰减机机理和副反应PankajAroratandRalphE.White*作者：PankajAroratandRalphE.White*CenterForElectrochemicalEngineering,DepartmentofChemicalEngineering,UniversityofSouthCarolina,Columbia,SouthCarolina29208,USA
2、美国，南卡罗来纳，年哥伦比亚29208，南卡罗来纳大学，化学工程系，中心电化学工程ABSTRACTThecapacityofalithium-ionbatterydecreasesduringcycling.Thiscapacitylossorfadeoccursduetoseveraldifferentmechanismswhichareduetoorareassociatedwithunwantedsidereactionsthatoccurinthesebatteries.Thesereactionsoccu
3、rduringoverchargeoroverdischargeandcauseelectrolytedecomposition,passivefilmformation,activematerialdissolution,andotherphenomena.Thesecapacitylossmechanismsarenotincludedinthepresentlithium-ionbatterymathematicalmodelsavailableintheopenliterature.Consequently
4、,thesemodelscannotbeusedtopredictcellperformanceduringcyclingandunderabuseconditions.Thisarticlepresentsareviewofthecurrentliteratureoncapacityfademechanismsandattemptstodescribetheinformationneededandthedirectionsthatmaybetakentoincludethesemechanismsinadvanc
5、edlithium-ionbatterymodels.Introduction摘要锂离子电池容量随着循环衰减。容量损失或者衰减的发生主要是由于以下几种反应机理，这些机理起因于或者关联于一些我们不希望发生在电池里的副反应。这些反应发生在过充或者过放中，导致了电解液分解、钝化膜的形成、活性物质溶解和其他现象形成。这些容量损失机理并没有包含在目前我们可接触到的公开的锂离子电池数学模型中。因此，这些模型并不能用在预测电池循环或者滥用条件下的电化学行为。这篇文章提出了当前锂离子电池容量衰减机理的观点，并且试图描述我们需要的信
6、息和方向，这些信息和方向有可能被引入先进的锂离子电池模型的机理中。前言Thetypicallithium-ioncell(Fig.1)ismadeupofacokeorgraphitenegativeelectrode,anelectrolytewhichservesasanionicpathbetweenelectrodesandseparatesthetwomaterials,andametaloxide(suchasLiCoO2,LiMn2O4,orLiNiO2)positiveelectrode.Thiss
7、econdary(rechargeable)lithium-ioncellhasbeencommercializedonlyrecently.Batteriesbasedonthisconcepthavereachedtheconsumermarket,andlithium-ionelectricvehiclebatteriesareunderstudyinindustry.Thelithium-ionbatterymarkethasbeeninaperiodoftremendousgrowtheversinceS
8、onyintroducedthefirstcommercialcellin1990.Withenergydensityexceeding130Wh/kg(e.g.,MatsushitaCGR17500)andcyclelifeofmorethan1000cycles(e.g.,Sony18650)inmanycases,thelithium-ionbatte
