Improved Capacity Retention for LiVO[subscript 2] by Cr Substitution

Author(s)
Ma, Xiaohua; Hautier, Geoffroy; Jain, Anubhav; Doe, Robert E.; Ceder, Gerbrand
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Improved Capacity Retention for LiVO2 by Cr Substitution
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Abstract
We present a layered Li-intercalation oxide that operates on the V[superscript 3+]/V[superscript 4+] redox couple. The stabilization effect of adding a +3 element into the layered LiVO[subscript 2] has been studied by first principles calculations. We identified Cr substitution into LiVO[subscript 2] to be promising for stabilizing a layered material based on the V redox couple. Layered LiCr[subscript x]V[subscript 1-x]O2 (x = 0.1, 0.2, 0.4, 0.5) has been synthesized and tested electrochemically. The improved capacity retention confirms that the structural stability of delithiated LiVO[subscript 2] is improved by Cr doping.
Date issued
2012-12
URI
http://hdl.handle.net/1721.1/82519
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Journal of the Electrochemical Society
Publisher
Electrochemical Society
Citation
Ma, X., G. Hautier, A. Jain, R. Doe, and G. Ceder. Improved Capacity Retention for LiVO2 by Cr Substitution. Journal of the Electrochemical Society 160, no. 2 (November 28, 2012): A279-A284.
Version: Final published version
ISSN
0013-4651
1945-7111
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