Methyl difluoroacetate inhibits corrosion of aluminum cathode current collector for lithium ion cells

被引：38

作者：

Kawamura, T ^{[1
]}

Tanaka, T

Egashira, M

Watanabe, I

Okada, S

Yamaki, J

机构：

[1] Japan Sci & Technol Agcy, Tokyo, Japan

[2] Kyushu Univ, Inst Mat Chem & Engn, Kasuga, Fukuoka 8168580, Japan

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2005年 / 8卷 / 09期

关键词：

D O I：

10.1149/1.1993367

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Cathode current collectors made of aluminum are corroded by LiN (SO2CF3)(2)/ethylene carbonate + dimethyl carbonate (1: 1 in volume ratio) electrolyte above 3.7 V. Therefore, the electrolyte cannot be used for 4 V lithium rechargeable batteries. By contrast, LiN (SO2CF3)(2)/methyl difluoroacetate (CHF2COOCH3, MFA) electrolyte showed good inhibition of aluminum corrosion, and a Li/LiCoO2 cell with an aluminum cathode current collector exhibited good cycle performance when the LiN (SO2CF3)(2)/MFA electrolyte was used. X-ray photoelectron spectroscopy of the aluminum surface treated by LiN (SO2CF3)(2)MFA electrolyte showed that the inhibition of corrosion derives from a passivation film made of an organic compound on the aluminum surface. (c) 2005 The Electrochemical Society. All rights reserved.

引用

页码：A459 / A463

页数：5

共 15 条

[1]

[Anonymous], [No title captured], Patent No. 4505997

[2] Stability of aluminum substrates in lithium-ion battery electrolytes [J].