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

Ying Bai; Chuan Wu; Feng Wu; Bo Rong Wu; Shi Chen

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

Paper Titles

Si 2p Core Level Shifts of the Epitaxial SiON Layer on a SiC(0001), Studied by Photoemissin Spectroscopy
p.15

Development of a Highly Active Pt-Catalyst for Selective Oxidation of CO in Excess H₂ at Room Temperature
p.21

Investigation on the Removal of B Impurity in Metallurgical Grade Si by Electron Beam Melting
p.29

Amorphous Ni-Co-B Catalyst for Hydrolysis of NaBH₄ in Alkaline Solution
p.33

Electrochemical Studies on Al₂O₃-Coated Spinel LiMn₂O₄ for Lithium Ion Batteries
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Calcium Evaporation from Metallurgical Grade Silicon by an Electron Beam Melting
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Removal of Phosphorus in Metallurgical Grade Silicon Using Electron Beam Melting
p.45

Solid Proton Conductor Based on Natural Diatomite
p.49

Effect of Pulling Rate on Multicrystalline Silicon Ingot during Directional Solidification
p.53

HomeMaterials Science ForumMaterials Science Forum Vols. 675-677Electrochemical Studies on Al2O3-Coated Spinel...

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

Abstract:

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.