模板-电沉积法制备孔状结构锡钴负极材料  

MACROPOROUS STRUCTURE SN-CO ALLOY NEGATIVE ELECTRODE MATERIAL FOR LITHIUM-ION BATTERY PREPARED BY TEMPLATE-ELECTRO-DEPOSITION

作　　者：孙玺[1] 于维平[1] 

机构地区：[1]北京航空航天大学,工程训练中心,北京100191

出　　处：《华南师范大学学报（自然科学版）》2009年第A01期5-7,共3页Journal of South China Normal University(Natural Science Edition)

基　　金：国家高技术研究发展计划(2006AA03Z230);北京市自然科学基金(2062014)

摘　　要：采用模板-电沉积法制备Sn-Co合金锂离子电池负极材料.用以柠檬酸、EDTA为络合剂混合CoCl2、SnCl4制备的溶液为电解液,在聚苯乙烯微球(PS)为模板的辅助下制备多孔Sn-Co电极.SEM测试表明:模板电沉积法制得Sn-Co电极表面为多层多孔三维结构.EDS能谱分析表明:多层多孔镀层中Sn-Co原子比(Sn∶Co)接近0.72∶1.首次充放电比容量分别为491.4 mAh/g和1 168.1 mAh/g,经过65次充放电循环之后,其充放电比容量仍然为401.5mAh/g和419.1 mAh/g.Macroporous Sn-Co electrode is prepared in polystyrene microspheres（PS） as a template-assisted by the electro-deposition method from citric acid,with EDTA as the complexing agent mixed CoCl2,SnCl4 electrolyte solution.SEM images reveal that the structure of the template-assembled electrode materials prepared by Natural sedimentation method is multi-layered and three-dimensional porous structure.EDS analysis shows that the atomic ratio of Sn/Co is about 0.72∶1.Charge-discharge tests demonstrate that Sn-Co electrodes present a much better cyclic capability.The first charge-discharge capacity is 491.4 mAh/g and 1 168.1 mAh/g,which remains to be 401.5 mAh/g and 419.1 mAh/g at the 65th cycle.

关 键 词：模板-电沉积 Sn-Co 多层多孔三维结构 锂离子电池 

分 类 号：TM912.9[电气工程—电力电子与电力传动]