Ion Transport Behavior in Nanotube‐Embedded Nanocomposite Polymer Electrolyte Membranes

Abstract

The present work is aimed to study the role of MWCNT on the performance of a PVA-based nanocomposite polymer electrolytes (NCPEs) gel membranes. The gel membranes are prepared by solution cast method and characterized by structural, electrical, and electrochemical measurements. SEM pictures confirm diminution in porosity of the system on increasing MWCNT contents. FTIR studies show the role of MWCNT as passive filler only causing structural changes and minor shifting occurs in the system. Optimum conductivity is achieved at 5.49×10−4 S cm −1 for 1 wt% MWCNT. The temperature dependence conductivity follows Arrhenius and Vogel-Tammam-Fulcher (VTF) behavior. The a.c. conductivity response seems to obey universal power law. LSV investigations on gel membranes have better electrochemical stability viz. ±4.29 Volt.