Dynamic Mechanical, DSC, and Electrical Investigations on Nano Al₂O₃Filled PVA:NH₄SCN:DMSO Polymer Composite Dried Gel Electrolytes

Abstract

This paper reports the dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and ionic conductivity studies on nanosized Al2O3(aluminium oxide) filled PVA:NH4SCN:DMSO polymer composite dried gel electrolytes prepared by the wet chemistry route. Better mechanical stability and thermal behavior are noticed in the composite system. Multiple relaxation peaks seen in tangent loss measurements (in DMA studies) have been suitably correlated. Enhancement in ionic conductivity has been noticed with an optimum value of 4.02 × 10−3 Scm−1 for 4 wt% nano Al2O3 filled composite electrolytes. Temperature dependence of ionic conductivity shows a combination of Arrhenius and VTF (Vogel-Tamman-Fulcher) behavior.