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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

S-Co复合掺杂LiMn2O4的合成与性能

夏君磊; 赵世玺; 刘韩星; 欧阳世翕   

  1. 武汉理工大学材料复合新技术国家重点实验室 武汉 430070
  • 收稿日期:2002-07-02 修回日期:2002-09-16 出版日期:2003-07-20 网络出版日期:2003-07-20

Synthesis and Performance of S-Co Co-doped LiMn2O4

XIA Jun-Lei; ZHAO Shi-Xi; LIU Han-Xing; OUYANG Shi-Xi;   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Wuhan University of Technology; Wuhan 430070; China
  • Received:2002-07-02 Revised:2002-09-16 Published:2003-07-20 Online:2003-07-20

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摘要： 为了扩大锂离子电池正极材料LixMn2O4的工作电压范围,在保证良好循环性能的基础上提高材料的容量,本文对S-Co复合掺杂LiMn2O4的合成工艺和电化学性能进行了研究。溶胶-凝胶法合成的各试样均为纯的立方尖晶石相,且结晶状态良好。S-Co复合掺杂综合了S掺杂效应和Co掺杂效应,改善了LiMn2O4的电化学性能,在2.4～4.3V充放电压范围内,初始容量较高,达到170mAh/g,30次循环后容量不但没有衰减而且有一定增加。

关键词: 锂离子电池, 正极材料, LiMn2O4, S-Co复合掺杂

Abstract: To extend the charge/discharge voltage range of cathode material LixMn2O4 for Li-ion battery and
elevate it’s capacity on the basis of good cyclability, the synthesis and electrochemical performance of S-Co co-doped LiMn2O4 were researched.
All the samples synthesized by the sol-gel method possess the structure of the pure cubic spinel phase and the crystallization is superior. The electrochemical performance of
LiCo0.1Mn1.9O4-xS_x is satisfying too. In voltage range of 2.4--4.3V, the initial capacity amounts to 170 mAh/g and it increases
to some extent instead of decreasing after 30 cycles.

Key words: Li-ion battery, cathode materials, LiMn2O4, S-Co co-dopant

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