Shu, D. and Gopukumar, S. and Kim, K.B. and Ryu, K.S. and Chang, S.H. (2003) Surface modification of LiMn2O4 thin films at elevated temperature. Solid State Ionics, 160. pp. 227-233.

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Abstract

In order to improve the cycle stability of spinel LiMn2O4 electrode at elevated temperature, the LiCoO2-coated and Codoped LiMn2O4 film were prepared by an electrostatic spray deposition (ESD) technique. LiCoO2-coated LiMn2O4 film shows excellent cycling stability at 55 jC compared to pristine and Co-doped LiMn2O4 films. The samples were studied by X-ray diffraction, scanning electron microscopy, Auger electron spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The excellent performance of LiCoO2-coated LiMn2O4 film can be explained by suppression of Mn dissolution. On the other hand, the LiCoO2-layer on the LiMn2O4 surface allows a homogenous Li+ insertion/extraction during electrochemical cycles and improves its structure stability.

Item Type:	Article
Uncontrolled Keywords:	Lithium ion battery; LiMn2O4; Surface modification; Mn dissolution
Subjects:	Lithium batteries
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	05 Apr 2012 11:21
Last Modified:	05 Apr 2012 11:21
URI:	http://cecri.csircentral.net/id/eprint/919

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