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

研究成果: ジャーナルへの寄稿学術誌査読

36 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)A459-A463
ジャーナルElectrochemical and Solid-State Letters
8
9
DOI
出版ステータス出版済み - 2005

!!!All Science Journal Classification (ASJC) codes

  • 化学工学(全般)
  • 材料科学(全般)
  • 物理化学および理論化学
  • 電気化学
  • 電子工学および電気工学

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