Ionic conductivity studies on plasticized PVC/PMMA blend polymer electrolyte containing LiBF4 and LiCF3SO3

Ionic conductivity of poly(vinylchloride) (PVC)/poly(methylmethacrylate) (P MMA) blended electrolytes containing LiCF3SO3 and LiBF4 has been studied us ing a.c. impedance spectroscopic technique. The: variation of conductivity has been investigated as a function of polymer blend ratio, plasticizer con tent, ethylene carbonate (EC) and propylene carbonate (PC) and lithium salt concentration at 25, 40, 50 and 60 degrees C. Electrolyte films showing co nductivities in the 10(-3) S cm(-1) region have been obtained, A 7:3 PMMA/P VC blend electrolyte at 70% plasticizer content has been found to possess o ptimal properties in terms of conductivity and mechanical strength. (C) 200 0 Elsevier Science B.V. All rights reserved.