Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes

Jun-ichi Yamaki; Takaaki Tanaka; Masayuki Ihara; Kazuya Sato; Izumi Watanabe; Minato Egashira; Shigeto Okada

doi:10.5796/electrochemistry.71.1154

Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes

Jun-ichi Yamaki, Takaaki Tanaka, Masayuki Ihara, Kazuya Sato, Izumi Watanabe, Minato Egashira, Shigeto Okada

Department of Advanced Device Materials

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

Abstract

LiPF6/Methyl difluoroacetate (MFA) shows a very good thermal stability with Li metal. However, LiPF6/Ethyl difluoroacetate (EFA) did not show any improvement of the thermal stability. Using FTIR and XPS, the main component of SEI in the MFA electrolyte was found to be CHF2COOLi. However, CHF2COOLi does not exist in the SEI of the EFA electrolyte, because CHF2COOLi dissolves in EFA electrolyte. CHF2COOLi was found to dissolve in EC, DMC, and DEC. Therefore, the addition of a small amount of MFA in 1 M LiPF6/EC + DMC, DMC, and DEC electrolytes was not effective to improve thermal stability.

Original language	English
Pages (from-to)	1154-1156
Number of pages	3
Journal	Electrochemistry
Volume	71
Issue number	12
DOIs	https://doi.org/10.5796/electrochemistry.71.1154
Publication status	Published - Dec 5 2003

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title = "Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes",

abstract = "LiPF6/Methyl difluoroacetate (MFA) shows a very good thermal stability with Li metal. However, LiPF6/Ethyl difluoroacetate (EFA) did not show any improvement of the thermal stability. Using FTIR and XPS, the main component of SEI in the MFA electrolyte was found to be CHF2COOLi. However, CHF2COOLi does not exist in the SEI of the EFA electrolyte, because CHF2COOLi dissolves in EFA electrolyte. CHF2COOLi was found to dissolve in EC, DMC, and DEC. Therefore, the addition of a small amount of MFA in 1 M LiPF6/EC + DMC, DMC, and DEC electrolytes was not effective to improve thermal stability.",

author = "Jun-ichi Yamaki and Takaaki Tanaka and Masayuki Ihara and Kazuya Sato and Izumi Watanabe and Minato Egashira and Shigeto Okada",

year = "2003",

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doi = "10.5796/electrochemistry.71.1154",

language = "English",

volume = "71",

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journal = "Electrochemistry",

issn = "1344-3542",

publisher = "The Electrochemical Society of Japan",

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TY - JOUR

T1 - Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes

AU - Yamaki, Jun-ichi

AU - Tanaka, Takaaki

AU - Ihara, Masayuki

AU - Sato, Kazuya

AU - Watanabe, Izumi

AU - Egashira, Minato

AU - Okada, Shigeto

PY - 2003/12/5

Y1 - 2003/12/5

N2 - LiPF6/Methyl difluoroacetate (MFA) shows a very good thermal stability with Li metal. However, LiPF6/Ethyl difluoroacetate (EFA) did not show any improvement of the thermal stability. Using FTIR and XPS, the main component of SEI in the MFA electrolyte was found to be CHF2COOLi. However, CHF2COOLi does not exist in the SEI of the EFA electrolyte, because CHF2COOLi dissolves in EFA electrolyte. CHF2COOLi was found to dissolve in EC, DMC, and DEC. Therefore, the addition of a small amount of MFA in 1 M LiPF6/EC + DMC, DMC, and DEC electrolytes was not effective to improve thermal stability.

AB - LiPF6/Methyl difluoroacetate (MFA) shows a very good thermal stability with Li metal. However, LiPF6/Ethyl difluoroacetate (EFA) did not show any improvement of the thermal stability. Using FTIR and XPS, the main component of SEI in the MFA electrolyte was found to be CHF2COOLi. However, CHF2COOLi does not exist in the SEI of the EFA electrolyte, because CHF2COOLi dissolves in EFA electrolyte. CHF2COOLi was found to dissolve in EC, DMC, and DEC. Therefore, the addition of a small amount of MFA in 1 M LiPF6/EC + DMC, DMC, and DEC electrolytes was not effective to improve thermal stability.

U2 - 10.5796/electrochemistry.71.1154

DO - 10.5796/electrochemistry.71.1154

M3 - Article

SN - 1344-3542

VL - 71

SP - 1154

EP - 1156

JO - Electrochemistry

JF - Electrochemistry

IS - 12

ER -

Thermal Stability of Methyl Difluoroacetate as a Novel Electrolyte Solvent for Lithium Batteries Electrolytes

Abstract

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