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 - Egashira, Minato
AU - Watanabe, Izumi
AU - Okada, Shigeto
PY - 2003/12
Y1 - 2003/12
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 CHF 2COOLi. 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 CHF 2COOLi. 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.
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U2 - 10.5796/electrochemistry.71.1154
DO - 10.5796/electrochemistry.71.1154
M3 - Article
AN - SCOPUS:0347128083
SN - 1344-3542
VL - 71
SP - 1154
EP - 1156
JO - Electrochemistry
JF - Electrochemistry
IS - 12
ER -