Synthesis of highly crystalline spinel LiMn2O4 by a soft chemical route and its electrochemical performance

被引：51

作者：

Luo, Jia-Yan

Li, Xi-Li

Xia, Yong-Yao ^{[1
]}

机构：

[1] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China

[2] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China

[3] Gejiu Superhoo Ind Co Ltd, Gejiu 661000, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 13期

基金：

中国国家自然科学基金;

关键词：

LiMnO4; lithiated manganese dioxide; rechargeable lithium batteries; cathode material; highly crystalline;

D O I：

10.1016/j.electacta.2006.12.049

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Highly crystalline spinel LiMn2O4 was successfully synthesized by annealing lithiated MnO2 at a relative low temperature of 600 degrees C, in which the lithiated MnO2, was prepared by chemical lithiation of the electrolytic manganese dioxide (EMD) and Lit. The LiI/MnO2 ratio and the annealing temperature were optimized to obtain the pure phase LiMn2O4. With the Lil/MnO2 molar ratio of 0.75, and annealing temperature of 600 degrees C, the resulting compounds showed a high initial discharge capacity of 127 mAh g(-1) at a current rate of 40 mAh g(-1). Moreover, it exhibited excellent cycling and high rate capability, maintaining 90% of its initial capacity after 100 charge-discharge cycles, at a discharge rate of 5 C, it kept more than 85% of the reversible capacity compared with that of 0.1 C. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4525 / 4531

页数：7

共 26 条

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