Conductivity and thermal studies of solid polymer electrolytes prepared by blending polyvinylchloride, polymethylmethacrylate and lithium sulfate

Composite polymer electrolyte films consisting of polyvinylchloride, polymethymethacrylate, dibutylphthalate, Li₂SO₄ and also ZrO₂ particles have been prepared by a casting procedure. The effect of an inorganic filler on the ionic conductivity of the blend polymer electrolytes was studied. The results indicated the incorporation of the ceramic filler at a low level decreases the ionic conductivity of the material, while at the higher concentrations there is an improvement of the conductivity. From the temperature dependence of the ionic conductivity can be suggested that the ion conduction follows the Williams-Landel-Ferrry mechanism, which is confirmed by Vogel-Tammann-Fulcher plots.