金属间化合物CoSb2电化学吸放锂特性的研究

稀有金属材料与工程, 2004, 33(3): 275-278.

金属间化合物CoSb2电化学吸放锂特性的研究

谢健 ^1, , 赵新兵 ^2, , 曹高劭 ^3, , 赵明坚 ^4,

1.浙江大学,浙江,杭州,310027

2.浙江大学,浙江,杭州,310027

3.浙江大学,浙江,杭州,310027

4.浙江大学,浙江,杭州,310027

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(20010335045)

关键词： marcasite 结构 , CoSb2 , 金属间化合物 , 负极材料

Study on Electrochemical Lithium Absorption/Release Properties of Intermetallic Compound CoSb2

采用悬浮熔炼和球磨方法制备了CoSb2合金粉末,并研究了它的电化学吸放锂性能.研究结果表明,具有marcasite结构的CoSb2 的首次可逆容量为263 mAh·g-1, 相应的体积比容量为2 130 mAh·cm-3.经过 15 个循环后,其可逆容量衰减到 123 mAh·g-1.在本实验中发现,把中间相微碳球(MCMB)加入到CoSb2 中不仅能改善其循环寿命,而且也能够明显提高其可逆容量.非原位XRD 测试的结果表明,虽然 marcasite 结构的CoSb2 本身并不能存储锂,但其结构破坏后形成的锑能与锂进行可逆的电化学反应.

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材料期刊网

金属间化合物CoSb2电化学吸放锂特性的研究

Study on Electrochemical Lithium Absorption/Release Properties of Intermetallic Compound CoSb2

参考文献