High capacity Li[Li0.2Mn0.54Ni0.13Co0.13]O2-V2O5 composite cathodes with low irreversible capacity loss for lithium ion batteries

被引：167

作者：

Gao, J.

Kim, J. ^{[2
]}

Manthiram, A. ^{[1
]}

机构：

[1] Univ Texas Austin, Electrochem Energy Lab, Austin, TX 78712 USA

[2] Chonnam Natl Univ, Dept Mat Sci & Engn, Kwangju 500757, South Korea

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 01期

关键词：

Lithium ion battery; Cathode material; Layered oxides; Composite cathodes; ELECTROCHEMICAL PROPERTIES; ELECTRODES;

D O I：

10.1016/j.elecom.2008.10.036

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

With an aim to suppress the huge irreversible capacity loss encountered in high capacity layered oxide solid solutions between Li2MnO3 and LiMO2 (M = Mn, Ni, and Co), layered Li[Li0.2Mn0.54Ni0.13Co0.13]O-2-V2O5 composite cathodes with various V2O5 contents have been investigated. The irreversible capacity loss decreases from 68 mAh/g at 100% Li[Li0.2Mn0.54Ni0.13Co0.13]O-2 to 0 mAh/g around 89 wt.% Li[Li0.2Mn0.54Ni0.13Co0.13]O-2-11 wt.% V2O5 as the lithium-free V2O5 serves as an insertion host to accommodate the lithium ions that could not be inserted back into the layered lattice after the first charge. The Li[Li0.2Mn0.54Ni0.13Co0.13]O-2-V2O5 Composite cathodes with about 10-12 wt.% V2O5 exhibit an attractive discharge capacity of close to 300 mAh/g with little irreversible capacity loss and good cyclability. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：84 / 86

页数：3

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