Effect of Solvents on Properties of Polymer Gel-Electrolyte Based
on Polyester Diacrylate

O. V. Yarmolenko^z, Yu. V. Baskakova, G. Z. Tulibaeva, L. M. Bogdanova, E. A. Dzhavadyan,
B.A.Komarov, N. F. Surkov, B. A. Rozenberg, and O. N. Efimov

Institute of Problems of Chemical Physics, Russian Academy of Sciences,
pr. Akad. Semenova 1, 142432 Chernogolovka, Moscow Region, Russia

Received November 15, 2007

Abstract—New polymer gel electrolytes based on polyester diacrylates and LiClO₄ salt solutions in organic
solvents are developed for lithium ion and lithium polymer batteries with a high ionic conductivity up to 2.7
10³ Ohm¹cm¹ at the room temperature. To choose the optimum liquid electrolyte composition, the depen-
dence is studied of physico–chemical parameters of new gel electrolytes on the composition of the mixture of
aprotic organic solvents: ethylene carbonate, propylene carbonate, and -butyrolacton. The bulk conductivity
of gel electrolytes and exchange currents at the gel electrolyte/Li interface are studied using the electrochemical
impedance method in symmetrical cells with two Li electrodes. The glass transition temperature and gel homo-
geneity are determined using the method of differential scanning calorimetry. It is found that the optimum mix-
ture is that of propylene carbonate and -butyrolacton, in which a homogeneous polymer gel is formed in a wide
temperature range of –150 to +50°C.

Key words: polymer gel electrolyte, Li electrode, polyester diacrylate, Li electrode/gel electrolyte phase
boundary

DOI: 10.1134/S1023193509010145

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