Fey, G.T. and Chen, J.G. and Premkumar, T. (2005) Carboxylate-alumoxanes as precursors for alumina coatings to enhance the cyclability of LiCoO2. Journal of Power Sources, 146. pp. 250-253.

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Abstract

LiCoO2 cathodes coated with Al2O3 derived from carboxylate-alumoxanes have been shown to possess improved cyclability. The carboxylate-alumoxanes were prepared by reacting pseudo-boehmite with acetic and substituted acetic acids. TEM images of the coated powders revealed that the alumina formed a compact kernel of thickness averaging about 20 nm. XRD data on the coated materials suggested the formation of solid solutions of the composition LiAlyCo1−yO2 on the surface, a conclusion attested by ESCA depth profiles. Galvanostatic cycling studies suggested that a coating formed from (methoxyethoxy)acetate-alumoxane enhanced the cyclability 13-fold. The improved cyclability is attributed to suppression of the cycle-limiting phase transitions accompanying the charge–discharge processes. The coating procedure based on carboxylate-alumoxanes is economical and environmentally benign, features attractive for industrial exploitation. © 2005 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Carboxylate-alumoxanes; Al2O3 coating; Coated LiCoO2; Coated cathodes; Lithium battery; Pseudo-boehmite
Subjects:	Lithium batteries
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	17 Jan 2012 05:28
Last Modified:	17 Jan 2012 05:28
URI:	http://cecri.csircentral.net/id/eprint/123

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