Enhancement of the electrochemical properties of LiMn2O4 through chemical substitution

被引：16

作者：

Bao, SJ ^{[1
]}

Zhou, WH ^{[1
]}

Liang, YY ^{[1
]}

He, BL ^{[1
]}

Li, HL ^{[1
]}

机构：

[1] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2006年 / 95卷 / 01期

基金：

中国国家自然科学基金;

关键词：

lithium-ion batteries; LiCr0.1Mn1.9O3.95F0.05; chemical substitution; sol-gel method;

D O I：

10.1016/j.matchemphys.2005.06.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrochemical performance of spinel-type LiMn2O4 cathode active materials has been effectively improved by dual doping with chromium and fluorine. The influence of different doping element on the structural and electrochemical properties of as-prepared samples was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and charge/discharge measurements. The results indicated that fluorine play an important role in controlling morphology, and the doped chromium could enhance significantly the stability of spinel-type LiMn2O4. The LiCr0.1Mn1.9O4 powders show high capacity retention, which is 95.4% of the initial after 30 cycles, and the novel compound LiCr0.1Mn1.9O3.95F0.05 with regular cubic spinel shapes was found to offer much higher capacity, whose initial discharge capacity was 130.6 mAh g(-1). (c) 2005 Elsevier B.V All rights reserved.

引用

页码：188 / 192

页数：5

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