Effects of salts in methyl difluoroacefatebased electrolytes on their thermal stability in lithium-ion batteries

T. Tanaka, T. Doi, S. Okada, J. I. Yamaki

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effects of salts in methyl difluoroacetate (MFA)-based electrolytes on their ionic conductivity and their thermal stability were investigated. When LiPF6 was used as a salt, an MFA-based electrolyte showed a higher ionic conductivity than an ethylene carbonate (EC) and dimethyl carbonate (DMC)-based electrolyte from -30 to 25 °C. In DSC curves, while an MFA-based electrolyte containing LiPF6 gave only negligible exothermic heat up to 400 °C, a large exothermic peak due to the electrolyte decomposition was observed at about 270 °C for an EC + DMC-based electrolyte. The thermal stability of lithium metal and de-lithiated LiCoO2 coexisting with an electrolyte of 1 mol dm-3 LiPF6/MFA is also reported.

Original languageEnglish
Pages (from-to)269-272
Number of pages4
JournalFuel Cells
Volume9
Issue number3
DOIs
Publication statusPublished - Jun 1 2009

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

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