Storage and cycling performance of Stoichiometric spinel at elevated temperatures

被引：30

作者：

Wang, X

Yagi, Y

Lee, YS

Yoshio, M

Xia, Y

Sakai, T

机构：

[1] Saga Univ, Fac Sci & Engn, Dept Appl Chem, Saga 8408502, Japan

[2] Osaka Natl Res Inst, Ikeda, Osaka 5638577, Japan

来源：

JOURNAL OF POWER SOURCES | 2001年 / 97-8卷

关键词：

LiMn2O4; 3.2 V plateau; oxygen deficiency; capacity loss; Mn dissolution;

D O I：

10.1016/S0378-7753(01)00689-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

LiMn2O4 has been synthesized using LiOH and Mn3O4 for 20 h in air by the melt-impregnation method. It showed pure X-ray diffraction (XRD) patterns without any impurities at 750 similar to 900 degreesC. This material exhibited a large 3.2 V plateau in its discharge curve when synthesized above 800 degreesC, The 3.2 V plateau showed a strong relation with the oxygen deficiency in the spinel structure, which means a degree of oxygen deficiency of the LiMn2O4 spinel. We confirmed that the oxygen deficiency and Mn dissolution are very important factors for inducing a capacity loss in the stoichiometric spinel at elevated temperature. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：427 / 429

页数：3

共 5 条

[1] LI METAL-FREE RECHARGEABLE LIMN2O4/CARBON CELLS - THEIR UNDERSTANDING AND OPTIMIZATION [J].