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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 22, Number 10
BKCSDE 22(10)
October 20, 2001 

Electrochemical Properties of Gel Polymer Electrolytes Prepared by Poly(vinyl acetate) Copolymers
Bookeun Oh, Yang Kook Sun, Dong Won Kim
Gel polymer electrolyte, Ionic conductivity, Lithium polymer battery, Poly(vinyl acetate).
We have studied the electrochemical properties of gel polymer electrolytes prepared by poly(vinyl acetate) copolymers. All of the gel polymer electrolytes showed elasticity, free standing property and ionic conductivities over 0.5 mS/cm in certain compositions. The vinyl acetate moiety could increase the affinity of copolymer toward carbonate-based liquid electrolytes, but silica was needed to prepare elastic and stable gel polymer electrolyte. The effect of silica on the different types of the copolymer matrix is discussed in detail. The gel polymer electrolyte prepared by using poly(methyl methacrylate-co-vinyl acetate)(PMVC) especially showed stable ionic conductivity over 1 ×10-3 S/cm with a reasonable mechanical strength and electrochemical stability window above 4.8 V among the gel polymer electrolytes that tested in this study.
1136 - 1140
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