Charge-discharge cycle behavior of MgAl2O4-doped LiMn2O4 cathode material for lithium-ion secondary battery

被引：8
|
作者：
Ozawa, N [1 ]
Donoue, K [1 ]
Yao, T [1 ]
机构：
[1] Kyoto Univ, Dept Fundamental Energy Sci, Grad Sch Energy Sci, Sakyo Ku, Kyoto 6068501, Japan
来源：
ELECTROCHEMICAL AND SOLID STATE LETTERS | 2003年 / 6卷 / 06期
关键词：
D O I：
10.1149/1.1568171
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
MgAl2O4-doped LiMn2O4 spinels, (LiMn2O4)(1-x)(MgAl2O4)(x) (x = 0, 0.02, 0.05, 0.10), were synthesized and the cycle performance as cathode material for lithium-ion secondary battery was investigated. Doping with MgAl2O4 improved the cycle performance of LiMn2O4 spinel. For (LiMn2O4)(0.95)(MgAl2O4)(0.05) the capacity fading was markedly suppressed compared to nondoped LiMn2O4. It is considered that stable Mg-O-Al bonds dispersed into the LiMn2O4 matrix stabilized the whole crystal lattice through the common oxygen arrangement between MgAl2O4 spinel and LiMn2O4 spinel and inhibited the deterioration of the crystal structure due to the repetition of lithium insertion and deinsertion, resulting in the improvement of cycle performance. (C) 2003 The Electrochemical Society.
引用
收藏
页码：A106 / A108
页数：3
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