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KMID : 1059520080520060668
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Journal of the Korean Chemical Society
2008 Volume.52 No. 6 p.668 ~ p.675
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Studies on Property of Li Salt-Organic Electrolytes Adding Ethyl Acetate
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Park Dong-Won
Chung Myoung-Woo
Lee Song-Joo
Choi Yong-Kook
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Abstract
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The electrolytes of Li-ion batteries were studied to find the optimum electrolyte with high ionic conductivity, large electrochemical window, etc. And also the chemical and electrochemical properties of passivation film formed on the surface of carbon anode by solvent decomposition in Li-ion batteries were studied. In this work, ethyl acetate was added in the EC:DEC mixed solvent to improve the electrochemical properties of the passivation film and its characterization was investigated. According to the results of chronopotentiometry, cyclic voltammetry, a.c. impedance, and scanning electron microscopy, the electrochemical properties of the passivation film and decomposition voltage of the mixed electrolyte differed depending on the physical properties of the ethyl acetate selected as 3rd solvent.
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KEYWORD
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Li-ion Batteries, Ethyl Acetate (EA), Solvent Decomposition, Carbon Anode, Passivation Film
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