【作者】 刘光； 王一菁； 焦丽芳； 杨化滨； 袁华堂；

【Author】 Liu Guang,Wang Yijing,Jiao Lifang,Yang Huabin,Yuan Huatang (Institute of New Energy Material Chemistry,Engineering Research Center of Energy Storage & Conversion(Ministry of Education) and Key Laboratory of Energy-Material Chemistry(Tianjin),Nankai University,Tianjin 300071,PR China)

【机构】 南开大学新能源材料化学研究所天津市能源材料化学重点实验室教育部高效储能工程研究中心；

【摘要】 电弧熔炼法制备了Co-Si合金,Rietveld精修表明Co-Si合金由CoSi₂和CoSi两相组成,相丰度分别为87.6%和12.4%CoSi₂相属于立方晶系,空间群Fm-3m,晶胞参数a=5.3650（?）;CoSi相属于立方晶系,空间群P213,晶胞参数a=4.4376（A）。电化学循环充放电和循环伏安测试（CV）表明Co-Si合金经过活化后其电化学容量最大达到225.8mAh/g,具有较好的可逆充放电性能和循环稳定性。更多还原

【Abstract】 Co-Si alloy was synthesized by arc melting method,Rietveld refinement test showed that the Co-Si alloy consists of 87.6wt.%CoSi₂ phase and 12.4wt.%CoSi phase.CoSi₂ phase with a cubic structure in space group Fm-3m,cell parameters a=5.365A and CoSi phase with a cubic structure in space group P213,cell parameters a=4.437A.Electrochemical charge-discharge cycle and cyclic voltammogram were tested,it showed that the maximum discharge capacity of the Co-Si alloy after activation was 225.8mAh/g,the material had good reversibility and cycle stability.更多还原