期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 11, 期 1, 页码 84-86出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.10.036
关键词
Lithium ion battery; Cathode material; Layered oxides; Composite cathodes
资金
- NASA
- Welch Foundation [F-1254]
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.
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