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 × 10−3 Ohm−1cm−1 at the room temperature. To choose the optimum liquid electrolyte composition, the dependence 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 λ-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 homogeneity are determined using the method of differential scanning calorimetry. It is found that the optimum mixture is that of propylene carbonate and λ-butyrolacton, in which a homogeneous polymer gel is formed in a wide temperature range of −150 to +50°C.
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Original Russian Text © O.V. Yarmolenko, Yu.V. Baskakova, G.Z. Tulibaeva, L.M. Bogdanova, E.A. Dzhavadyan, B.A. Komarov, N.F. Surkov, B.A. Rozenberg, O.N. Efimov, 2009, published in Elektrokhimiya, 2009, Vol. 45, No. 1, pp. 107–112.
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Yarmolenko, O.V., Baskakova, Y.V., Tulibaeva, G.Z. et al. Effect of solvents on properties of polymer gel-electrolyte based on polyester diacrylate. Russ J Electrochem 45, 101–107 (2009). https://doi.org/10.1134/S1023193509010145
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DOI: https://doi.org/10.1134/S1023193509010145