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

Tetsuya Kawamura, Takaaki Tanaka, Minato Egashira, Izumi Watanabe, Shigeto Okada, Jun Ichi Yamaki

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Cathode current collectors made of aluminum are corroded by LiN(SO 2CF3)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(SO 2CF3)2/methyl difluoroacetate (CHF 2COOCH3, 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(SO 2CF3)2/MFA electrolyte was used. X-ray photoelectron spectroscopy of the aluminum surface treated by LiN(SO 2CF3)2MFA electrolyte showed that the inhibition of corrosion derives from a passivation film made of an organic compound on the aluminum surface.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume8
Issue number9
DOIs
Publication statusPublished - Sep 29 2005

Fingerprint

Aluminum
Lithium
accumulators
Electrolytes
corrosion
Cathodes
lithium
cathodes
electrolytes
Ions
Corrosion
aluminum
cells
ions
Carbonates
carbonates
Aluminum corrosion
Secondary batteries
lithium batteries
organic compounds

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

Methyl difluoroacetate inhibits corrosion of aluminum cathode current collector for lithium ion cells. / Kawamura, Tetsuya; Tanaka, Takaaki; Egashira, Minato; Watanabe, Izumi; Okada, Shigeto; Yamaki, Jun Ichi.

In: Electrochemical and Solid-State Letters, Vol. 8, No. 9, 29.09.2005.

Research output: Contribution to journalArticle

Kawamura, Tetsuya ; Tanaka, Takaaki ; Egashira, Minato ; Watanabe, Izumi ; Okada, Shigeto ; Yamaki, Jun Ichi. / Methyl difluoroacetate inhibits corrosion of aluminum cathode current collector for lithium ion cells. In: Electrochemical and Solid-State Letters. 2005 ; Vol. 8, No. 9.
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