%0 Journal Article
%T Physical and Electrolytic Properties of Monofluorinated Ethyl Acetates and Their Application to Lithium Secondary Batteries
%A Noritoshi Nambu
%A Yukio Sasaki
%J Open Journal of Metal
%P 1-9
%@ 2164-277X
%D 2015
%I Scientific Research Publishing
%R 10.4236/ojmetal.2015.51001
%X Ethyl acetate (EA) shows low viscosity for its relative permittivity. Monofluorinated organic solvents
exert the polar effect on the various properties. We have investigated the effect of position
isomerism on the physical and electrochemical properties of two monofluorinated carboxylates:
2-fluoroethyl acetate (2FEA) and ethyl fluoroacetate (EFA). Relative permittivity of 2FEA was lower
than that of EFA, whereas viscosity of 2FEA was higher. Electrolytic conductivity of a LiPF<span style=\"white-space:normal;\"><sub></sub></span><span style=\"white-space:normal;\"><span style=\"white-space:normal;\"><sub></sub></span><span style=\"white-space:normal;\">6</span><span style=\"white-space:normal;\"></span></span><span style=\"white-space:normal;\"></span> solution
in 2FEA was lower than that in EFA, but higher than that in EA at high temperatures. The use
of 2FEA as a co-solvent improved cycling efficiency and suppressed fading of discharge capacity of
a Li|LiCoO<sub><span style=\"white-space:normal;\">2</span></sub> coin cell at high cycle numbers.
%K Monofluorinated Organic Solvent
%K Carboxylate
%K Position Isomerism
%K Electrolytic Properties
%K Discharge Capacity
%K Lithium Secondary Battery
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=56064