CoSi_2合金的制备及其电化学性能研究  

Preparation and Electrochemical Performance of CoSi_2 Alloy

作　　者：刘光[1] 张彦辉[1] 王一菁[1,2,3] 焦丽芳[1,2,3] 袁华堂[1,2,3] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071 [2]天津市能源材料化学重点实验室,天津300071 [3]南开大学教育部高效储能工程研究中心,天津300071

出　　处：《南开大学学报（自然科学版）》2009年第6期77-80,共4页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(50631020;50701025);国家863项目(2007AA05Z149;2007AA05Z108;2006AA05Z110);天津市基础研究计划(07JCYBJC03500;07JCEDJC02700)

摘　　要：采用电弧熔炼法成功制备了CoSi_2合金,利用Rietveld结构精修法研究了该合金的晶体结构.精修结果表明CoSi_2晶体属于立方晶系,空间群Fm-3m,晶胞参数α=0.5367 nm.电化学容量和循环寿命测试发现CoSi_2合金经过活化后其电化学容量最大达到176.4 mAh/g,循环稳定性较好.对CoSi_2合金电极的电化学反应机理进行了探讨.CoSi2 alloy was successful synthesized by arc melting method, and the crystal structure of CoSi2 alloy were studied by Rietveld refinement. CoSi2 crystals with a cubic struc- ture in space group Fm-3m, cell parameters a=0.5367nm. Electrochemical discharge capacity and cycle life were tested, it showed that the maximum discharge capacity of CoSi2 alloy after activation was 176.4 mAh/g, and it had good cycle stability. Electrochemical reaction mechanism of CoSi2 alloy electrode were discussed through cyclic voltammetry test.

关 键 词：COSI2 合金 电弧熔炼法 RIETVELD精修 电化学性能 

分 类 号：O646[理学—物理化学]