Electrochemical properties of CoFe3Sb12 as potential anode material for lithium-ion batteries
Electrochemical properties of CoFe3Sb12 as potential anode material for lithium-ion batteries
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DOI：
10.1631/jzus.2004.0418
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发表时间：
2004-04
影响因子：
3.2
通讯作者：
Xinbing Zhao;Y. Zhong;G. Cao
中科院分区：
文献类型：
--
作者：
Xinbing Zhao;Y. Zhong;G. Cao
采用真空熔炼法制备了一种方钴矿型锑化物CoFe_3Sb_（12）。XRD分析表明材料中含有Sb、FeSb 2、CoSb 2和CoSb 3相。使用纯锂作为参比电极，研究了球磨CoFe 3Sb 12 −10 wt%石墨复合材料的电化学性能。在第一次循环中获得了约860 mAh/g的最大嵌锂容量。材料的首次循环可逆容量约为560 mAh/g，随后逐渐降低。非原位XRD分析表明，原始材料中的锑化物在第一次放电后分解，锑是锂嵌入主体材料的活性元素。
A skutterudite-related antimonide, CoFe3Sb12, was prepared with vacuum melting. XRD analysis showed the material contained Sb, FeSb2, CoSb2 and CoSb3 phases. The electrochemical properties of the ball-milled CoFe3Sb12−10 wt% graphite composite were studied using pure lithium as the reference electrode. A maximal lithium inserting capacity of about 860 mAh/g was obtained in the first cycle. The reversible capacity of the material was about 560 mAh/g in the first cycle and decreased toca. 320 mAh/g and 250 mAh/g after 10 and 20 cycles respectively.Ex-situ XRD analyses showed that the antimonides in the pristine material were decomposed after the first discharge and that antimony was the active element for lithium to insert into the host material.