Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes

Jun Ichi Yamaki, Takaaki Tanaka, Masayuki Ihara, Kazuya Sato, Minato Egashira, Izumi Watanabe, Shigeto Okada

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

LiPF6/Methyl difluoroacetate (MFA) shows a very good thermal stability with Li metal. However, LiPF6/Ethyl difluoroacetate (EFA) did not show any improvement of the thermal stability. Using FTIR and XPS, the main component of SEI in the MFA electrolyte was found to be CHF 2COOLi. However, CHF2COOLi does not exist in the SEI of the EFA electrolyte, because CHF2COOLi dissolves in EFA electrolyte. CHF2COOLi was found to dissolve in EC, DMC, and DEC. Therefore, the addition of a small amount of MFA in 1 M LiPF6/EC + DMC, DMC, and DEC electrolytes was not effective to improve thermal stability.

Original languageEnglish
Pages (from-to)1154-1156
Number of pages3
JournalElectrochemistry
Volume71
Issue number12
Publication statusPublished - Dec 1 2003

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Lithium batteries
Electrolytes
Thermodynamic stability
X ray photoelectron spectroscopy
Metals
difluoroacetic acid

All Science Journal Classification (ASJC) codes

  • Electrochemistry

Cite this

Yamaki, J. I., Tanaka, T., Ihara, M., Sato, K., Egashira, M., Watanabe, I., & Okada, S. (2003). Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes. Electrochemistry, 71(12), 1154-1156.

Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes. / Yamaki, Jun Ichi; Tanaka, Takaaki; Ihara, Masayuki; Sato, Kazuya; Egashira, Minato; Watanabe, Izumi; Okada, Shigeto.

In: Electrochemistry, Vol. 71, No. 12, 01.12.2003, p. 1154-1156.

Research output: Contribution to journalArticle

Yamaki, JI, Tanaka, T, Ihara, M, Sato, K, Egashira, M, Watanabe, I & Okada, S 2003, 'Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes', Electrochemistry, vol. 71, no. 12, pp. 1154-1156.
Yamaki JI, Tanaka T, Ihara M, Sato K, Egashira M, Watanabe I et al. Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes. Electrochemistry. 2003 Dec 1;71(12):1154-1156.
Yamaki, Jun Ichi ; Tanaka, Takaaki ; Ihara, Masayuki ; Sato, Kazuya ; Egashira, Minato ; Watanabe, Izumi ; Okada, Shigeto. / Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes. In: Electrochemistry. 2003 ; Vol. 71, No. 12. pp. 1154-1156.
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abstract = "LiPF6/Methyl difluoroacetate (MFA) shows a very good thermal stability with Li metal. However, LiPF6/Ethyl difluoroacetate (EFA) did not show any improvement of the thermal stability. Using FTIR and XPS, the main component of SEI in the MFA electrolyte was found to be CHF 2COOLi. However, CHF2COOLi does not exist in the SEI of the EFA electrolyte, because CHF2COOLi dissolves in EFA electrolyte. CHF2COOLi was found to dissolve in EC, DMC, and DEC. Therefore, the addition of a small amount of MFA in 1 M LiPF6/EC + DMC, DMC, and DEC electrolytes was not effective to improve thermal stability.",
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