Investigations on Al2O3 dispersed PEO/PVP based Na+ ion conducting blend polymer electrolytes

In this current study, Na+ ion conducting solid blend polymer electrolytes (NCSBPEs) based on polyethylene oxide (PEO) / polyvinyl pyrrolidine (PVP) / sodium nitrate (NaNO3) with the addition of different wt.% aluminum oxide (Al2O3) as filler were prepared using solution casting technique. The prepared solid blend polymer electrolytes are subjected to X-ray diffraction (XRD), Fourier transforms infrared (FTIR), and AC-impedance techniques. The complexation has been studied using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) measurements. AC-impedance spectroscopy has been used to analyze the ionic conductivity of the solid blend polymer electrolytes. The higher ionic conductivity (sigma) -10(-7) S/cm(-1) is obtained for PEO: PVP: NaNO3 film and it was enhanced to similar to 10(-5) S/cm(-1) with the addition of Al2O3 filler at the ambient temperature. The dielectric and tan 6 values were also calculated using the impedance analysis. In LSV (linear sweep voltammetry) studies, a broad electrochemical stability window was observed for polymer electrolytes besides CV (cyclic voltammetry) studies confirm the electrochemical behavior of the electrolytes.

Automated summary

In this study, Na+ ion conducting solid blend polymer electrolytes with Al2O3 filler were prepared and characterized using XRD, FTIR, and AC-impedance techniques. The addition of Al2O3 was found to enhance the ionic conductivity of the electrolytes. CV and LSV studies confirmed the electrochemical behavior of the polymer electrolytes.