金属间化合物CoSb3的电化学嵌锂特性研究

稀有金属材料与工程, 2001, 30(4): 268-272.

金属间化合物CoSb3的电化学嵌锂特性研究

张丽娟 ^1, , 赵新兵 ^2, , 蒋小兵 ^3, , 吕春萍 ^4,

1.浙江大学,

2.浙江大学,

3.浙江大学,

4.浙江大学,

基金项目: 国家自然科学基金(59771032) 高等学校博士学科点专项科研项目(97033518)

关键词： skutterudite结构 , CoSb3 , 电化学性能 , 锂离子电池

Study on The Electrochemical Performances of Intermetallic Compound CoSb\-3 in Lithium-Ions Batteries

研究了金属间化合物CoSb3作为锂离子电池阳极材料在1MLiPF6/EC+DMC(1∶1)电解液中的电化学性能. 具有skutterudite结构的CoSb3和不具有此种结构的CoSb3最大可逆容量分别为573 mAh*g-1 和444 mAh*g-1, 10个循环内可逆容量分别保持在400 mAh*g-1和220 mAh*g-1以上, 采用非原位XRD方法研究二者嵌锂机理, 发现skutterudite结构虽然不起储锂作用, 但它破坏后形成的微观结构却有利于循环过程. 加入10%(质量分数, 下同)微碳球MCMB后CoSb3电化学性能大大提高, 最大可逆容量达715 mAh*g-1, 循环20次后可逆容量保持在500 mAh*g-1以上.

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材料期刊网

金属间化合物CoSb3的电化学嵌锂特性研究

Study on The Electrochemical Performances of Intermetallic Compound CoSb\-3 in Lithium-Ions Batteries

参考文献