The role of the solvent in PMMA gel polymer electrolytes

J. Vondrák 1 , M. Musil 1 , M. Sedlaříková 1 , R. Kořínek 2 , K. Bartušek 1 , 2 ,  and A. Fedorková 1
  • 1 Department of Electrical and Electronic Technology, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, 616 00, Czech Republic
  • 2 Institute of Scientific Instruments of the ASCR, Brno, 612 64, Czech Republic

Abstract

Ionic mobility and solvent vapor pressure were studied on gels containing sodium perchlorate, polymethylmethacrylate and sulfolane as a solvent. The excess of solvent increases markedly the mobility of ions and is indicated by solvent evaporation at elevated temperature. The solvent is bonded similarly as in the liquid solution of sodium salt. The heat of solvent evaporation from gels is near to that of pure solvents.

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