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1、......CapacityFadeMechanismsandSideReactionsinLithium-IonBatteriesPankajAroratandRalphE.WhiteCenterForElectrochemicalEngineering,DepartmentofChemicalEngineering,UniversityofSouthCarolina,Columbia,SouthCarolina29208,USAABSTRACTThecapacityofalithium-ionbatterydecreasesduringcyclin
2、g.Thiscapacitylossorfadeoccursduetoseveraldifferentmechanismswhichareduetoorareassociatedwithunwantedsidereactionsthatoccurinthesebatteries.Thesereactionsoccurduringoverchargeoroverdischargeandcauseelectrolytedecomposition,passivefilmformation,activematerialdissolution,andotherp
3、henomena.Thesecapacitylossmechanismsarenotincludedinthepresent鋰離子電池容量衰減機理和界面反應(yīng)研究作者：PankajAroratandRalphE.White美國，南卡羅來納29208，哥倫比亞，南卡羅來納州大學(xué)，化工學(xué)院化工系摘要鋰電池在循環(huán)過程中，其容量會逐漸衰減專業(yè).專注.......lithium-ionbatterymathematicalmodelsavailableintheopenliterature.Consequently,thesemodelscannotbeusedt
4、opredictcellperformanceduringcyclingandunderabuseconditions.Thisarticlepresentsareviewofthecurrentliteratureoncapacityfademechanismsandattemptstodescribetheinformationneededandthedirectionsthatmaybetakentoincludethesemechanismsinadvancedlithium-ionbatterymodels。。而出現(xiàn)容量衰減主要歸因于幾個不同
5、的機理，這些機理大多與電池內(nèi)部的界面反應(yīng)相關(guān)，這些反應(yīng)持續(xù)性的發(fā)生在電池的充放電環(huán)節(jié)，并且引起電解液的分解、鈍化膜的形成、活性材料的溶解等其它現(xiàn)象。關(guān)于容量衰減的機理在目前公開的鋰離子電池數(shù)學(xué)模型的文獻中并未加以闡述，因此在鋰電池循環(huán)過程中和處于苛刻的條件下，我們無法通過模型來對鋰電池的性能作出有效的預(yù)測。本篇文章將陳述容量衰減的機理，并且試著去解釋其本質(zhì)，為構(gòu)建先進的鋰電池模型指明方向。lntroductionThetypicallithium-ioncell(Fig.1)ismadeupofacokeorgraphitenegativeelectr
6、ode,anelectrolytewhichservesasanionicpathbetweenelectrodesandseparatesthetwomaterials,andametaloxide(suchasLiCoO2,LiMn2O4,orLiNiO2)positiveelectrode.Thissecondary(rechargeable)lithium-ioncellhasbeencommercializedonlyrecently.47Batteriesbasedonthisconcepthavereachedtheconsumermar
7、ket,andlithium-ionelectricvehiclebatteriesareunderstudyinindustry.概論傳統(tǒng)的鋰電池由碳或石墨負極材料、作為電極間的離子傳輸通道的電解液、金屬氧化物（例如LiCoO2、LiMn2O4、LiNiO2）正極材料三部分組成，這種二次（可充電）電池已經(jīng)商業(yè)化。依照這種原理制作的鋰電池已經(jīng)形成穩(wěn)定的消費者市場，同時鋰離子動力電池也在進行工業(yè)化研究。自從專業(yè).專注.......Thelithium-ionbatterymarkethasbeeninaperiodoftremendousgrowthev
8、ersinceSonyintroducedthefirstcommercialcellin19
