Studies on multiferroic oxide-doped PVA-based nanocomposite gel polymer electrolyte system for electrochemical device application

摘要

The present work reports development of bismuth iron oxide (BFO)-doped PVA:(NH4 CH3COO) nanocomposite gel polymer electrolyte (NCGPE) films. XRD profiles revealed enhancement in the amorphous behavior of composite gel electrolyte upon incorporation of BFO as filler particles. I-t measurements exhibit ionic charge transport. The ionic conductivity of the electrolytes has been evaluated from impedance spectroscopy, and the highest value at room temperature have been found to be 1.05x10(-3)Scm(-1) for the composite gel samples containing 0.5wt% filler concentration. The temperature dependence of ionic conductivity exhibits a combination of Arrhenius and Vogel-Tamman-Fulcher (VTF) behavior. Charge carrier density has been also evaluated from the dielectric response of the electrolyte films. Cyclic voltammetry of the films reveals a wide electrochemical window (-2.54 to +2.89V) with good cyclic response to suggest its applicability for battery applications.