Enhancement of thermal stability of LiCoO2 by LiMn2O4 coating

被引：91

作者：

Cho, JP ^{[1
]}

Kim, G ^{[1
]}

机构：

[1] Samsung Display Devices Co, Chunan, Chungchong Nam, South Korea

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 1999年 / 2卷 / 06期

关键词：

Cathodes - Coatings - Decomposition - Electrolytes - Energy dispersive spectroscopy - Gels - Heat treatment - Particles (particulate matter) - Scanning electron microscopy - Temperature - Thermodynamic stability - X ray diffraction;

D O I：

10.1149/1.1390802

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A significant improvement in thermal stability of the charged LiCoO2 with a particle size of 5 mu m has been achieved by coating its particle surface with LiMn2O4. An onset temperature for thermal decomposition of the LiMn2O4-coated LiCoO2 prepared by heating at 800 degrees C was 225 degrees C, whereas that of the bare LiCoO2 is 185 degrees C. In addition, the coating also improved the capacity retention on cycling at 4.3 V charge cut-off significantly. These results appear to indicate that the coating is effective in retarding the decomposition reaction of LiCoO2 with the electrolytes as well as sustaining its structural stability on cycling. (C) 1999 The Electrochemical Society. S1099-0062(98)12-074-6. All rights reserved.

引用

页码：253 / 255

页数：3

共 7 条

[1]

CHO J, UNPUB SOLID STATE IO

[2]

CHO J, UNPUB J ELECTROCHEM

[3]

Gao YA, 1998, ELECTROCHEM SOLID ST, V1, P117, DOI 10.1149/1.1390656

[4]

MALASPINA F, 1998, 15 INT SEM EXH PRIM

[5]

*NOM RES I, 1998, TRENDS SEC BATT 97 9

[6]

TSURUTA H, 1998, MATSUSHITA DENKO GIH, V44, P407

[7] Differential scanning calorimetry material studies: implications for the safety of lithium-ion cells [J].

Zhang, Z ;

Fouchard, D ;

Rea, JR .

JOURNAL OF POWER SOURCES, 1998, 70 (01) :16-20

← 1 →