Vanadium Modified LiFePO4 Cathode for Li-Ion Batteries

被引：100

作者：

Hong, Jian ^{[1
]}

Wang, C. S. ^{[2
]}

Chen, X. ^{[3
]}

Upreti, S. ^{[1
]}

Whittingham, M. Stanley ^{[1
]}

机构：

[1] SUNY Binghamton, Dept Chem & Mat Sci, Binghamton, NY 13902 USA

[2] Univ Maryland, Dept Chem Engn, College Pk, MD 20742 USA

[3] Univ Houston, Dept Chem, Houston, TX 77004 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2009年 / 12卷 / 02期

基金：

美国能源部;

关键词：

cathodes; electrochemical electrodes; lithium compounds; nanostructured materials; secondary cells; vanadium; LITHIUM; OLIVINES; STORAGE; IRON;

D O I：

10.1149/1.3039795

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The structure and electrochemical behavior of vanadium-modified olivine LiFePO4 was investigated. Vanadium was found to be incorporated into the olivine structure on the phosphorus site, not on the iron site, with the unit cell decreasing in size as the vanadium content increases. Material synthesized under reducing conditions with 5% vanadium gave materials with the best electrochemical performance. The rate capability of nanostructured LiFeP0.95V0.05O4 was comparable to the best nanosized LiFePO4 formed solvothermally while using less than 1/3 the amount of carbon conductor. The vanadium does not appear to be electrochemically active within the voltage cycling window of LiFePO4.

引用

页码：A33 / A38

页数：6

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