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1、第20卷第6期中国有色金属学报2010年6月Vol.20No.6TheChineseJournalofNonferrousMetalsJune2010文章编号：1004-0609(2010)06-1155-06锂离子电池用金属锡电沉积层的储锂性能111111,21,2王慧娟，方文斌，王建明，万辉，沈宸，张鉴清，曹楚南(1.浙江大学化学系，杭州310027；2.中国科学院金属研究所腐蚀与防护国家重点实验室，沈阳110016)摘要：以铜箔为基体，采用电沉积法制备锡电沉积层，并将其制成锂离子电池用锡电极。采用扫描电子显微镜、X射线能量分散分析、X射线衍射、循环伏安和恒流充放电等对
2、锡电极的物理性质和电化学性能进行表征。结果表明：调整电沉积时间可以有效地改变锡沉积层的表面形貌；电沉积5min获得的网状多孔结构的锡沉积层具有较大的不可逆容量和较好的电化学循环性能；电沉积较长时间制得的致密颗粒状金属锡电沉积层具有相对较大的可逆储锂容量，但其在电化学循环过程中会出现容量衰退现象；锡颗粒尺寸的降低有利于改进颗粒状金属锡电沉积层的储锂性能；电沉积15min制得的锡沉积层由粒径较小的颗粒组成，经30次充放电循环后其可逆储锂容量为400mA·h/g。关键词：锡电极材料；锂离子电池；电沉积；形貌；容量中图分类号：TM912.9文献标志码：ALithiumstorage
3、performanceofelectrodepositedtincoatingsaselectrodematerialforlithium-ionbattery111111,21,2WANGHui-juan,FANGWen-bin,WANGJian-ming,WANHui,SHENChen,ZHANGJian-qing,CAOChu-nan(1.DepartmentofChemistry,ZhejiangUniversity,Hangzhou310027,China;2.StateKeyLaboratoryforCorrosionandProtectionofMetal,I
4、nstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016,China)Abstract:Theelectrodepositedtincoatingsaselectrodematerialforlithium-ionbatterieswerepreparedbyelectroplatingusingcopperfoilassubstrate,andtheirpropertieswereinvestigatedbyscanningelectronmicroscopy(SEM),X-rayenergydispe
5、rsiveanalysis,X-raydiffractometry(XRD),cyclicvoltammetry(CV)andgalvanostaticcharge-dischargetests.Theresultsshowthatthemorphologiesofthetincoatingsmaybeeffectivelychangedbyadjustingtheelectroplatingtime.TheSncoatingwithporousnetworkstructureobtainedbyelectroplatingfor5minshowslargeirrevers
6、iblecapacityandgoodelectrochemical-cyclingstability.Thedensegranulartincoatingsobtainedbyelectroplatingforlongertimedisplaylargerreversiblelithiumstoragecapacity,butthecapacitydecayoccursduringtheelectrochemicalcycling.Forthedensegranulartincoatings,smallertingrainsizeimprovesthelithiumsto
7、rageperformance.Thedensegranulartincoatingwithsmallergrainsizeobtainedbyelectroplatingfor15minpresentsreversiblecapacityof400mA·h/gafter30cycles.Keywords:Snelectrodematerial;lithiumionbatteries;electroplating;morphology;capacity[1−2]锂离子电池具有输出电压高、比容量大、放电电于正、负极活
