Synthesis and Characterization of polymer gel electrolyte

Abstract

A series of PVDF based polymer gel electrolytes (PGEs) with different compositions of O/Na were prepared and the structural, morphological and electrical properties were characterized. For the formation of gel, solvent (i.e. DMF), salt (i.e. NaI) and polymer (i.e. PVDF) were taken as starting materials. By gelation method, different compositions of polymer gel electrolyte were prepared by keeping the amount of PVDF constant and changing the O/Na ratio (i.e. 20, 40, 60, 80, and 100). During the preparation process the polymer: solvent ratio was taken to be 2:3. Three characterization techniques such as XRD, SEM and Dielectric Spectroscopy were used to get information about the structure, morphology; frequency dependent dielectric and conductivity behaviour of the prepared samples of PGE. XRD analysis showed the semi crystalline behaviour and SEM study confirmed the result observed from XRD analysis. The electrical properties were investigated and d. c. conductivity was from the complex impedance plot. The dielectric parameters (i.e., dielectric constant and tangent loss) were also studied in a wide frequency range.