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ID:27898444
大小:1.53 MB
页数:8页
时间:2018-12-06
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1、WORD资料整理Octadecylamineoxideasthetemplatesynthesisoflithiatedvanadiumoxideshalfopened-nanotubesSynthesisofLithiatedVanadiumOxidesHalfOpened-nanotubesasCathodeMaterialsforLithiumIonBatteriesJunliSun*InstituteofScienceandResearch,DepartmentofScienceandResearch,ChinesePeople’sArmedPoliceFo
2、rceAcademy,220XihuanRoad,AnciDistrict,LangfangCity,HebeiProvince(065000),China.Tel(86)316-2067617AbstractThelithiatedvanadiumoxideshalfopened-nanotubes(HOT)aresynthesizedbyusingsolid-stateandsolvothermalreactionwithoctadecylamineoxideasthetemplate.Transmissionelectronmicroscopy(TEM)and
3、scanningelectronmicroscopy(SEM)characterizationsshowthatthesynthesizedlithiatedvanadiumoxidesnanotubesarehalfopenedandagglomerate.X-raydiffraction(XRD)investigationdemonstratesthatthesynthesizedhalfopened-nanotubesaremostconsistedofmonoclinicphaseLiV3O8.Cyclicvoltammetry(CV)testindicat
4、esthatsomeredoxprocessesarehindered,whichispropitioustoimproveelectrochemicalperformanceofLiV3O8cathodematerial.Keywords:electrochemicalproperties;nanostructures;SEM;TEMIntroductionNanostructuredcathodeandanodematerialsinlithiumionbatterieshaveattractedgreatattention.Thisisbecausetheys
5、howhighercapacitythanconventional*Correspondingauthor.Tel.:+86-316-2067617;Fax:+86-316-2067613E-mailaddresses:sunjunli@nankai.edu.cn完美格式可编辑WORD资料整理electrodescomposedofthesamematerials,andthesurfaceareaofnanostructuredelectrodesismuchlargerthanthatofconventionalelectrodes.Vanadiumoxides
6、havebeenwidelystudiedascathodeactivematerialsinlithiumrechargeablebatteriesbecauseoftheirlowcostandhightheorycapacity[1-6].ChenWetal.usethetemplatehydrothermaltreatmenttosynthesizeV2O5nanotubes.Whentheyareusedascathode,theresultingcellhasshowninitialdischargespecificcapacityof306mAhg-1
7、at3.6-1.5V,whichissignificantlysuperiortothatofmaterialspreparedbyconventionalmethods.Thisnanotubecanmaintain80%ofitsinitialcapacity[7].ButtherewerenoreportsaboutanymethodstoprocessLiV3O8halfopened-nanotubeselectrodematerial.Inthiswork,high-orderedLiV3O8halfopened-nanotubesarraysares
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