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

Jun Ichi Yamaki; Masayuki Ihara; Shigeto Okada

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

Jun Ichi Yamaki, Masayuki Ihara, Shigeto Okada

Department of Advanced Device Materials

Research output: Contribution to conference › Paper › peer-review

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 language	English
Pages	41-56
Number of pages	16
Publication status	Published - 2003
Event	New Trends in Intercalation Compounds for Energy Storage and Conversion - Proceedings of the International Symposium - Paris, France Duration: Apr 30 2003 → May 2 2003

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Other	New Trends in Intercalation Compounds for Energy Storage and Conversion - Proceedings of the International Symposium
Country/Territory	France
City	Paris
Period	4/30/03 → 5/2/03

All Science Journal Classification (ASJC) codes

Engineering(all)

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Thermal studies of methyl difluoroacetate as a novel candidate for electrolyte solvent of lithium-ion cells. / Yamaki, Jun Ichi; Ihara, Masayuki; Okada, Shigeto.
2003. 41-56 Paper presented at New Trends in Intercalation Compounds for Energy Storage and Conversion - Proceedings of the International Symposium, Paris, France.

Research output: Contribution to conference › Paper › peer-review

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

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.",

author = "Yamaki, {Jun Ichi} and Masayuki Ihara and Shigeto Okada",

year = "2003",

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AU - Yamaki, Jun Ichi

AU - Ihara, Masayuki

AU - Okada, Shigeto

PY - 2003

Y1 - 2003

N2 - 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.

AB - 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.

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

Abstract

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