新型锂离子电池负极材料CoFe_3Sb_(12)  

INTERMETALLIC COMPOUND CoFe_3Sb_(12) AS ANODE MATERIAL FOR LITHIUM ION BATTERIES

作　　者：蒋小兵[1] 赵新兵[1] 张丽娟[1] 曹高劭[1] 吕春萍[1] 周邦昌[1] 

机构地区：[1]浙江大学

出　　处：《材料研究学报》2001年第4期469-472,共4页Chinese Journal of Materials Research

基　　金：国家自然科学基金59771032;教育部博士点基金97033518资助项目

摘　　要：用高能球磨方法制备出ＣｏＦｅ３Ｓｂ１２合金粉末，研究了电化学性能 结果表明， ＣｏＦｅ３Ｓｂ（１２）中的活性元素Ｓｂ可以与锂离子发生可逆电化学反应，其嵌锂产物为Ｌｉ_３Ｓｂ．ＣｏＦｅ３Ｓｂ（１２）电极在 ２０ｍＡ／ｇ的电流密度下第一次可逆容量为 ３９６ｍＡｈ／ｇ．在材料中加入原子分数为５０％的石墨（化学计量式为ＣＯＦｅ_３Ｓｂ_（１２）－Ｃ_（１６））后，以１００ｍＡ／ｇ进行充放电时，第一次可逆容量为３８０ｍＡｈ／ｇ．电极的循环寿命性能优良．Ultra fine CoFe3Sb12 powders were prepared by high-energy ball-mill. Lithium ion can be electrochemically inserted into CoFe3Sb12, alloying with Sb to form Li3Sb alloy. Electrochemical properties were investigated. It was found that the reversible capacity of first cycle is 396mAh/g (charge and discharge at the current density of 20mA/g). Composite material CoFe3Sb12-C16 was prepared by adding 50% (atomic fraction) graphite in order to improve its reversible capacity under large current density. 380mAh/g reversible capacity can be obtained during the first charge and discharge process under current density of 100mA/g. A good cycle life can be obtained even under large current density. This material shows superior properties as anode of lithium ion batteries.

关 键 词：锂离子电池 负极材料 CoFe3Sb12 电化学容量 充电性能 钴铁锑合金粉末 放电性能 

分 类 号：TM912[电气工程—电力电子与电力传动] TM2[一般工业技术—材料科学与工程]