Structural and optical characterization of PVA:KMnO 4 based solid polymer electrolyte

By Omed Gh. Abdullah, S. B. Aziz, M. A. Rasheed. 2016

238 citations recorded by the source corpus.

Abstract Solid polymer electrolyte films of polyvinyl alcohol (PVA) doped with a different weight percent of potassium permanganate (KMnO 4 ) were prepared by standard solution cast method. XRD and FTIR techniques were performed for structural study. Complex formation between the PVA polymer and KMnO 4 salt was confirmed by Fourier transform infrared (FTIR) spectroscopy. The description of crystalline nature of the solid polymer electrolyte films has been confirmed by XRD analysis. The UV-Visible absorption spectra were analyzed in terms of absorption formula for non-crystalline materials. The fundamental optical parameters such as optical band gap energy, refractive index, optical conductivity, and dielectric constants have been investigated and showed a clear dependence on the KMnO 4 concentration. The observed value of optical band gap energy for pure PVA is about 6.27 eV and decreases to a value 3.12 eV for the film sample formed with 4 wt% KMnO 4 salt. The calculated values of refractive index and the dielectric constants of the polymer electrolyte films increase with increasing KMnO 4 content.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

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