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Electrolyte optimization for a Li ion battery by charge profile analysis
Authors:Minwhan Cha  Cheolsoo Jung
Affiliation:(1) Department of Chemical Engineering, University of Seoul, 13 Shiripdae-gil, Dongdaemun-gu, Seoul, 130-743, Korea
Abstract:Electrolyte design for Li ion batteries was approached by means of comparison of faradaic and non-faradaic currents. The faradaic current by the movement of Li+ ions was dependent on the composition of the electrolyte and was related to the battery capacity; the higher the capacity, the greater the current by the faradaic reaction. The open circuit potential of the electrode with a greater faradaic current decreased at a slower rate than that of the electrode with a smaller faradaic current. This analysis method can be used to prepare an optimal electrolyte of an actual Li ion battery, especially when developing batteries with excellent high-rate discharge capabilities and low temperature discharge properties.
Keywords:Faradaic reaction  Non-faradaic reaction  Open circuit voltage  Li ion battery  Electrolyte
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