Electronic conductivity of LiCoO2 and its enhancement by magnesium doping

被引：360

作者：

Tukamoto, H ^{[1
]}

West, AR ^{[1
]}

机构：

[1] JAPAN STORAGE BATTERY CO LTD,CTR CORP RES & DEV,MINATO KU,KYOTO 601,JAPAN

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1997年 / 144卷 / 09期

关键词：

D O I：

10.1149/1.1837976

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

LiCoO2 the active cathode material in commercial rechargeable lithium batteries, is shown to be a p-type semiconductor, associated with the presence of a small concentration of Co4+ ions. Its conductivity at room temperature can be increased by over two orders of magnitude, to similar to 0.5 S cm(-1), by partial substitution of Co3+ by Mg2+ and compensating hole creation. The electrochemical performance of LiMg0.05Co0.95O2 is comparable to that of LiCoO2; a small reduction in capacity, associated with a reduction in Co3+ content, occurs but good reversibility is retained and, in contrast to LiCoO2, the Mg-doped material is single phase throughout the charge/discharge cycle.

引用

页码：3164 / 3168

页数：5

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