中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 24 No. 7 July 2014 |
（1. Products Research and Development Department, Mitsubishi Aluminum Co., Ltd.,
85 Hiramatsu, Susono-city, Shizuoka-pref., 411-1127, Japan;
2. Central Research Institute, Electronic Components Department, Mitsubishi Materials Corporation,
1002-14 Mukohyama, Naka-city, Ibaraki-pref., 311-0102, Japan）
Abstract:Aluminum foils having thicknesses of 10-20 μm are commonly employed as current collectors for cathode electrodes in Li-ion batteries. The effects of the surface morphology of the foil on battery performance were investigated by using a foil with roughened surface by chemical etching and a plain foil with smooth surface on both sides. For high-conductivity LiCoO2 active materials with large particle size, there are no significant differences in battery performance between the two types of foils. But for low-conductivity LiFePO4 active materials with small particle size, high-rate discharge properties are significantly different. The possibility shows that optimizing both the surface morphology of the aluminum foil and particle size of active material leads to improvement of the battery performance.
Key words: lithium-ion battery; battery performance; surface treatment; conductivity; plain foil; roughened foil
