Fey, G.T. and Wang, Z.F. and Lu, C.Z. and Premkumar, T. (2005) MgAl2O4 spinel-coated LiCoO2 as long-cycling cathode materials. Journal of Power Sources, 146. pp. 245-249.

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Abstract

The enhanced cyclability of LiCoO2 coated with MgAl2O4 is described. A TEM examination of the microstructure of the coated particles revealed that the spinel formed a rather uniform coating over the cathode material. XRD data suggested the presence of substitutional oxides on the surface of the cathode particles. R-factor values from XRD studies and galvanostatic cycling studies suggested that a coating level of 1.0 wt.% gave an optimal performance in capacity and cyclability. A commercial sample of LiCoO2 coated with 1.0 wt.% of spinel registered a five-fold improvement in cyclability. The improved cyclability is attributed to a suppression of the cycle-limiting phase transitions that accompany the charge–discharge processes.

Item Type:	Article
Uncontrolled Keywords:	Coated LiCoO2; Spinel-coated cathodes; Sol–gel coating; MgAl2O4; Lithium battery
Subjects:	Lithium batteries Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	17 Jan 2012 06:14
Last Modified:	17 Jan 2012 06:14
URI:	http://cecri.csircentral.net/id/eprint/124

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