运用纳米结构钛钒氧化物制备的高稳定性正极材料.pdf

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1、第4期刘平等：运用纳米结构钛钒氧化物制备的高稳定性正极材料545ArticleID：0427-7104（2004）04-0545-04!HighlyStableCathodeMaterialsPreparedFromMesostructuredTi-VOxidesLIUPing，ZHANGJi-Guang，TRACYC.Edwin，TURNERJohnA（NationalRenewableEnergyLaboratory，Golden，CO80401，USA）Abstract：Amesostructuredtitanium-vanadiumoxidehasbeensynt

2、hesizedusingn-dodecyiamineasatempiate.Thermaitreat-mentat330Cresuitsinapartiairemovaiofthetempiate.Theresuitingtitanium-vanadiumoxideexhibitssimiiarcapacity（ap-proximateiy400mAh/g），withbutbettercyciingstabiiitythanthecontroisampiepreparedintheabsenceofdodecyiaminewhenusedasacathodeiniithi

3、umbatteries.Keywords：tempiatesynthesis；mesostructure；vanadiumoxide；iithiumbattery；cathodemateriaiCLCnumber：0646.6Documentcode：AThesoi-geisynthesisofvanadiumoxideasacathodemateriaiforiithiumbatterieshasbeenthesubjectofinterest［1-5］formorethanadecade.Thisiowtemperatureprocessisbasedonaninor

4、ganicpoiymerizationreactioninasoiu-tion.Twosynthesisroutesareusuaiiydescribeddependingonwhethertheprecursorisanagueoussoiutionoranaikox-ideinanorganicsoivent.Theformerinvoivesthepoiycondensationofdecavanadicacid，whiiehydroiysisoforganovanadiumcompoundsisusedtoformtheoxideframeworkintheiat

5、erapproach.Vanadiumoxidexerogeishavebeenfoundtopossessaiayeredstructurewithaone-dimensionaiorder，aithoughtheorganicrouteaffordsaiessor-deredstructure.Thesemateriaishavebeentestedascathodesforiithiumbatteries，especiaiiyinpoiymereiectroiyte［6］ceiis.Thedesignofaiayeredstructureisintendedtofa

6、ciiitatetheinsertion-removaiofiithiumionsduringchargeanddischarge.Thisstructureaisoavoidstheextensivephasetransitionthatoftenoccursduringiithiuminsertioninto［1］crystaiiinevanadiumoxide.Inrecentyears，theconceptof“tempiatingsynthesis”hasbeenusedtosynthesizenanostructuredmetaiox-［7-9］ides.Me

7、taioxidesareprecipitatedonthesurfaceofiong-chainsurfactantarraysinasoiution.Theas-formedor-ganic-inorganicnanocompositesthenundergothermaitreatmenttoeiiminatetheorganiccomponent.Inthisreport，weusethisconcepttosynthesizeatitaniumdopedvanadiumoxidewithaiayeredstructur