常压回流掺钴钙锰矿锂离子电池正极材料

doi:10.61558/2993-074X.2045

电化学（中英文） ›› 2010, Vol. 16 ›› Issue (1): 90-95. doi: 10.61558/2993-074X.2045

常压回流掺钴钙锰矿锂离子电池正极材料

李瑞琦;宋春华;徐超;涂丽杏;邱国红;刘凡;

华中农业大学农业部亚热带资源与环境重点开放实验室;

收稿日期:2010-02-28 修回日期:2010-02-28 出版日期:2010-02-28 发布日期:2010-02-28

Cobalt-doped Todorokite Prepared by Refluxing at Atmospheric Pressure as Lithium-ion Battery Cathode

LI Rui-qi,SONG Chun-hua,XU Chao,TU Li-xing,QIU Guo-hong,LIU Fan*

(Key Laboratory of Subtropical Agriculture Resource and Environment,Ministry of Agriculture,Huazhong Agricultural University,Wuhan430070,China

Received:2010-02-28 Revised:2010-02-28 Published:2010-02-28 Online:2010-02-28

摘要/Abstract

摘要： 常压回流法制备掺杂钴离子的钙锰矿,X-射线衍射(XRD)、热重(TG)、化学分析等测试表明:钙锰矿均为单一相,组成为MgxCoyMnOz·nH2O,其中0.18≤x≤0.22、0≤y≤0.24、2.10≤z≤2.53、0.35≤n≤0.73.以掺钴钙锰矿作锂离子二次电池正极材料,组成为Tod-Co10%(10%Co的Mg0.18Co0.12MnO2.19·0.45H2O)电极放电性能最佳,其首次放电比容量为219mAh/g,100次循环充放电仍有102mAh/g.对比之下,未掺钴的Tod-Co0%电极(钙锰矿)首次放电比容量为211mAh/g,30次循环后为37mAh/g.

关键词: 常压回流, 钙锰矿, 钴离子掺杂, 锂离子二次电池, 正极材料

Abstract: Cobalt-doped todorokites were prepared by refluxing at atmospheric pressure,and then charactered by X-ray diffraction(XRD),thermogravimetry(TG) and the analysis of chemical compositions.These measurements showed that all of the refluxing products were single phase of todorokites and the structure formulas were MgxCoyMnOz·nH2O,where 0.18 ≤ x ≤ 0.22,0 ≤ y ≤ 0.24,2.10 ≤ z ≤ 2.53,and 0.35 ≤ n ≤0.73.The electrochemical characteristics of cobalt-doped todorokites were examined as lithium insertion hosts for cathodes in rechargeable lithium batteries.The first discharge capacity of undoped todorokite electrode was 211 mAh/g and the discharge capacity became 37 mAh/g after 30 cycles.The Mg0.18Co0.12MnO2.19·0.45 H2O with doping Co 10% displayed the best discharge behavior,which showed a high discharge capacity of 219 mAh/g at first cycle and the cycling capacity of 102 mAh/g after 100 cycles.

Key words: refluxing at atmospheric pressure, todorokite, cobalt-doped, lithium-ion secondary battery, cathode materials

中图分类号:

TM912

李瑞琦, 宋春华, 徐超, 涂丽杏, 邱国红, 刘凡, . 常压回流掺钴钙锰矿锂离子电池正极材料[J]. 电化学（中英文）, 2010, 16(1): 90-95.

LI Rui-qi, SONG Chun-hua, XU Chao, TU Li-xing, QIU Guo-hong, LIU Fan. Cobalt-doped Todorokite Prepared by Refluxing at Atmospheric Pressure as Lithium-ion Battery Cathode[J]. Journal of Electrochemistry, 2010, 16(1): 90-95.

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https://electrochem.xmu.edu.cn/CN/Y2010/V16/I1/90

参考文献

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常压回流掺钴钙锰矿锂离子电池正极材料

Cobalt-doped Todorokite Prepared by Refluxing at Atmospheric Pressure as Lithium-ion Battery Cathode

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