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

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

doi:10.1002/fuce.200800085

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

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

Department of Advanced Device Materials

Research output: Contribution to journal › Article › peer-review

13 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 language	English
Pages (from-to)	269-272
Number of pages	4
Journal	Fuel Cells
Volume	9
Issue number	3
DOIs	https://doi.org/10.1002/fuce.200800085
Publication status	Published - Jun 2009

All Science Journal Classification (ASJC) codes

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

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10.1002/fuce.200800085

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title = "Effects of salts in methyl difluoroacefatebased electrolytes on their thermal stability in lithium-ion batteries",

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.",

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T1 - Effects of salts in methyl difluoroacefatebased electrolytes on their thermal stability in lithium-ion batteries

AU - Tanaka, T.

AU - Doi, T.

AU - Okada, S.

AU - Yamaki, J. I.

PY - 2009/6

Y1 - 2009/6

N2 - 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.

AB - 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.

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

Abstract

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