Electrochemical Studies on Al2O3-Coated Spinel LiMn2O4 for Lithium Ion Batteries

Abstract:

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Spinel LiMn2O4 was synthesized via a solid state reaction, and modified with Al2O3 thin layers by a chemical deposition method. The electrochemical performances of the as-prepared samples were investigated with cyclic voltammetry (CV) and charge-discharge test. It is found that the Al2O3-coated LiMn2O4 help dramatically retaining the discharge capacity upon long-term cycling. The influences of the heat-treating temperature and the coating amount are discussed and compared. The optimized sample is 1% Al2O3/ LiMn2O4 heat-treated at 500oC, which has an initial discharge capacity of 116mAh/g, and a very slight capacity loss of 1.7% at the 50th cycle.

Info:

Periodical:

Materials Science Forum (Volumes 675-677)

Edited by:

Yi Tan and Dongying Ju

Pages:

37-40

DOI:

10.4028/www.scientific.net/MSF.675-677.37

Citation:

Y. Bai et al., "Electrochemical Studies on Al2O3-Coated Spinel LiMn2O4 for Lithium Ion Batteries", Materials Science Forum, Vols. 675-677, pp. 37-40, 2011

Online since:

February 2011

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Price:

$35.00

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