Surface-coating Modification of Li-rich Cathode Materials Li[Li0.2Mn0.4Fe0.4]O2

doi:10.3724/SP.J.1095.2013.20364

Chinese Journal of Applied Chemistry

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Surface-coating Modification of Li-rich Cathode Materials Li[Li_0.2Mn_0.4Fe_0.4]O₂

WANG Hong^1*, ZHANG Weide²

(1.School of Chemistry and Chemical Engineering,Mianyang Normal University,Mianyang 621000,China;
2.College of Chemistry,South China University of Technology,Guangzhou 510006,China)

Received:2012-08-23 Revised:2012-09-13 Published:2013-06-10 Online:2013-06-10
Contact: Wang Hong

Abstract

Abstract: Li-rich cathode material of Li[Li0.2Mn0.4Fe0.4]O2 was prepared by co-precipitation, and was modified by surface coating with Al2O3. The modified samples were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical tests. It was found that the 4.0%Al2O3 coated Li[Li0.2Mn0.4Fe0.4]O2 exhibited a good cycling performance compared with the bare Li[Li0.2Mn0.4Fe0.4]O2. The discharge capacity loss of the surface coated Li[Li0.2Mn0.4Fe0.4]O2 after 50 cycling was about 9%.

Key words: Lithium ion batteries, surface coated Li[Li0.2Mn0.4Fe0.4]O2, Li-rich Cathode materials

CLC Number:

O646

WANG Hong1*, ZHANG Weide2. Surface-coating Modification of Li-rich Cathode Materials Li[Li_0.2Mn_0.4Fe_0.4]O₂[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2013.20364.

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Surface-coating Modification of Li-rich Cathode Materials Li[Li_0.2Mn_0.4Fe_0.4]O₂

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