Direct carbon-black coating on LiCoO2 cathode using surfactant for high-density Li-ion cell

被引:71
作者
Kim, J
Kim, B
Lee, JG
Cho, J [1 ]
Park, B
机构
[1] Kumoh Natl Inst Technol, Dept Appl Chem, Gumi 730701, South Korea
[2] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul, South Korea
[3] Seoul Natl Univ, Res Ctr Energy Convers & Storage, Seoul, South Korea
关键词
capacity; carbon-black coating; surfactant; density; lithium-ion battery; lithium cobalt oxide;
D O I
10.1016/j.jpowsour.2004.07.008
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Direct carbon-black coating of the cathode material using a surfactant increases the capacity of a Li-ion cell by similar to10% compared with using bare LiCoO2. The coating method comprises two steps: (i) dispersion of aggregated carbon black using orotano(R)-a polyacrylate dispersant; (ii) carbon-black coating of the cathode material using a gelatin-an amphoteric surfactant. This technology reduces the carbon content in the electrode without sacrificing the cycle-life performance of the cell, and also improves the rate capability of the Li-ion cell. Moreover, the direct carbon-black-coated cathode exhibits excellent capacity recovery and restricted expansion of the cell thickness compared with a bare cathode during storage at 85 degreesC. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:289 / 294
页数:6
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