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http://dx.doi.org/10.5229/JKES.2015.18.4.150

Synthesis and Physicochemical Properties of Branched Solid Polymer Electrolytes Containing Ethylene Carbonate Group  

Kim, Doo-Hwan (Department of Engineering Chemistry, Chungbuk National University)
Ryu, Sang-Woog (Department of Engineering Chemistry, Chungbuk National University)
Publication Information
Journal of the Korean Electrochemical Society / v.18, no.4, 2015 , pp. 150-155 More about this Journal
Abstract
In this study polymer electrolytes containing ethylene carbonate group which have a high dielectric constant and poly(ethylene glycol) as branches were prepared by the Williamson reaction between poly(ethylene glycol) methyl ether and block copolymers composed of glycerol-1,2-carbonate and 4-chloromethyl styrene. Interestingly, the highest ionic conductivity of $1.75{\times}10^{-5}S\;cm^{-1}$ was observed from the polymer electrolyte having 7 mol% of ethylene carbonate and the [EO]:[Li] ratio of 32:1. Moreover, it was found that the electrochemical stability of polymer electrolyte was achieved up to 5.5 V because of the presence of ethylene carbonate.
Keywords
Ethylene carbonate; Polymer electrolyte; Branch; Ionic conductivity; Electrochemical stability;
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