Impedance studies on plasticized PMMA-LiX [X: CF 3SO 3−, N(CF 3SO 2) 2−] polymer electrolytes

Abstract

Plasticized polymer electrolytes composed of poly(methylmethacrylate) (PMMA) as the host, propylene carbonate (PC) or ethylene carbonate (EC) as a plasticizer and LiX (X: CF 3SO 3 − or N(CF 3SO 2) 2 −) as a salt were prepared by the solution cast technique. Impedance spectroscopy was performed in the temperature range between 303 and 383 K. In this paper, we report the electrical properties of polymer electrolytes with different lithium salts and plasticizers. The polymer electrolytes investigated exhibited high ionic conductivity at room temperature in the range of 10 − 6 to 10 − 4 S cm − 1 . The temperature dependence studies showed that the samples were ionic conductors and seemed to obey the Vogel–Tamman–Fulcher (VTF) rule. FTIR spectroscopy studies confirmed the polymer–salt interaction.