Stability of lithium ion spinel cells III. Improved life of charged cells

被引：94

作者：

Wang, E ^{[1
]}

Ofer, D ^{[1
]}

Bowden, W ^{[1
]}

Iltchev, N ^{[1
]}

Moses, R ^{[1
]}

Brandt, K ^{[1
]}

机构：

[1] Duracell Worldwide Technol Ctr, Needham, MA 02194 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2000年 / 147卷 / 11期

关键词：

D O I：

10.1149/1.1394013

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We investigate irreversible capacity losses in lithium ion manganese spinel cells during 60 degreesC storage in the charged state and propose a mechanism based on acid generation to explain the origin of the irreversible loss. Various approaches such as surface, structural, electrode formulation, and electrolyte modification were applied to address the instability issue. Based on understanding of the mechanism, we developed a method of coating the spinel surface with a carbonate layer to minimize the detrimental effect of acid generation in cells. As a result, irreversible losses were reduced from >70% after I weeks of storage at 60 degreesC to about 20%. (C) 2000 The Electrochemical Society. S0013-4651(00)01-019-3 All rights reserved.

引用

页码：4023 / 4028

页数：6

共 23 条

[1] Materials' effects on the elevated and room temperature performance of C/LiMn2O4 Li-ion batteries [J].