THE EFFECTS OF CARBON NANO-COATING ONLi(Ni0.8Co0.15Al0.05)O2CATHODE MATERIAL USING ORGANIC CARBON FORLi-ION BATTERY

Jeong-Hun Ju, Young-Min Chung, Yu-Rim Bak, Moon-Jin Hwang and Kwang-Sun Ryu ()
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Jeong-Hun Ju: Department of Chemistry, University of Ulsan, Daehak-ro 102, Nam-gu, Ulsan 680-749, Korea
Young-Min Chung: Department of Chemistry, University of Ulsan, Daehak-ro 102, Nam-gu, Ulsan 680-749, Korea
Yu-Rim Bak: Department of Chemistry, University of Ulsan, Daehak-ro 102, Nam-gu, Ulsan 680-749, Korea
Moon-Jin Hwang: Department of Chemistry, University of Ulsan, Daehak-ro 102, Nam-gu, Ulsan 680-749, Korea
Kwang-Sun Ryu: Department of Chemistry, University of Ulsan, Daehak-ro 102, Nam-gu, Ulsan 680-749, Korea

Surface Review and Letters (SRL), 2010, vol. 17, issue 01, 51-58

Abstract: Carbon nano-coatedLiNi0.8Co0.15Al0.05O2/C(LNCAO/C) cathode-active materials were prepared by a sol–gel method and investigated as the cathode material for lithium ion batteries. Electrochemical properties including the galvanostatic charge–discharge ability and cyclic voltammogram behavior were measured. Cyclic voltammetry (2.7–4.8 V) showed that the carbon nano-coating improved the "formation" of the LNCAO electrode, which was related to the increased electronic conductivity between the primary particles. The carbon nano-coated LNCAO/C exhibited good electrochemical performance at highC-rate. Also, the thermal stability at a highly oxidized state of the carbon nano-coated LNCAO was remarkably enhanced. The carbon nano-coating layer can serve as a physical and/or (electro-)chemical protection shell for the underlying LNCAO, which is attributed to an increase of the grain connectivity (physical part) and also to the protection of metal oxide from chemical reactions (chemical part).

Keywords: Lithium ion battery; cathode; LNCAO; LiNi0.8Co0.15Al0.05O2; carbon coating (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X1001376X

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