Ac Conductivity and Thermal Studies of Pan-Nafdoped Gel Polymer Electrolytes for Solid State Battery Applications

Abstract

Thin film membranes of poly acrylonitrile (PAN) doped with sodium Fluoride (NaF) was prepared by solution casting technique. The Gel polymer Electrolyte films exhibiting an average thickness of 142 µm. The films were prepared with different (wt %) ratios. The structural formations were analyzed by X-Ray Diffraction method (XRD).The Conductivity Studies (AC) and thermal conductivity studies (DSC) of the different ratios of gel polymer electrolyte composites were studied. The AC conductivity studies were determined from the impedance data and thermal conductivity studies were measured using the transient electric pulse method. The AC Conductivity increases with increasing temperature and NaF Concentration. The formed fluoride complexes also contribute in increasing the AC quantities. The DSC measurements showed a decrease in the degree of crystallinity and increase of amorphous regions with increasing concentration of salt NaF. The sample containing 70PAN:30NaF exhibited the maximum conductivity of 1.82x10 -4 S cm -1 at room temperature (303K) and 2.96x10 -3 S cm -1 at 373K.