Effects of Salts in Methyl Difluoroacetate‐based Electrolytes on their Thermal Stability in Lithium‐ion Batteries | Zendy

Tanaka T. | Zendy; Doi T. | Zendy; Okada S. | Zendy; Yamaki J.i. | Zendy

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Effects of Salts in Methyl Difluoroacetate‐based Electrolytes on their Thermal Stability in Lithium‐ion Batteries

Author(s) -

Tanaka T.,

Doi T.,

Okada S.,

Yamaki J.i.

Publication year - 2009

Publication title -

fuel cells

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.485

H-Index - 69

eISSN - 1615-6854

pISSN - 1615-6846

DOI - 10.1002/fuce.200800085

Subject(s) - electrolyte , ethylene carbonate , dimethyl carbonate , thermal stability , lithium (medication) , chemistry , inorganic chemistry , exothermic reaction , ionic conductivity , thermal decomposition , salt (chemistry) , decomposition , organic chemistry , methanol , electrode , medicine , endocrinology

The effects of salts in methyl difluoroacetate (MFA)‐based electrolytes on their ionic conductivity and their thermal stability were investigated. When LiPF 6 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 LiPF 6 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 LiCoO 2 coexisting with an electrolyte of 1 mol dm –3 LiPF 6 /MFA is also reported.

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