Thermal studies of methyl difluoroacetate as a novel candidate for electrolyte solvent of lithium-ion cells

Jun Ichi Yamaki, Masayuki Ihara, Shigeto Okada

Research output: Contribution to conferencePaper

Abstract

The thermal stability of IM LiPF6/ CHF2COOCH 3 (methyl difluoroacetate, MFA) with lithiated carbon anodes and the electrochemical characteristics of carbon anodes in this electrolyte have been investigated in terms of the use of this electrolyte in lithium-ion batteries. Differential scanning calorimeter (DSC) measurement of LiPF6/ MFA with lithiated carbon anodes indicated that the main exothermic peak is around 400 °C. The peak temperature was 110 °C higher than the peak of LiPF6/ EC-DMC [1:1 in vol.] with lithiated carbon anodes. CHF2COOLi existed as a major component of SEI on the lithium metal anode in LiPF6/ MFA electrolyte. It was expected that a reaction product of CHF2COOLi and lithiated carbon increased the thermal stability. A good cycle performance was obtained for the lithium ion cell used in IM LiPF6/MFA.

Original languageEnglish
Pages41-56
Number of pages16
Publication statusPublished - 2003
EventNew Trends in Intercalation Compounds for Energy Storage and Conversion - Proceedings of the International Symposium - Paris, France
Duration: Apr 30 2003May 2 2003

Other

OtherNew Trends in Intercalation Compounds for Energy Storage and Conversion - Proceedings of the International Symposium
CountryFrance
CityParis
Period4/30/035/2/03

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Yamaki, J. I., Ihara, M., & Okada, S. (2003). Thermal studies of methyl difluoroacetate as a novel candidate for electrolyte solvent of lithium-ion cells. 41-56. Paper presented at New Trends in Intercalation Compounds for Energy Storage and Conversion - Proceedings of the International Symposium, Paris, France.