Temperature dependent AC electrical properties of solid polymer PVA based proton electrolyte

Abstract

In this study, theSolid polymer electrolyte (SPE)containing polyvinyl alcohol (PVA) and lithium perchloride(LiClO4) have been prepared by using solution cast technique.The objective of this study is to investigate the influence of LiClO4 inorganic salt on the AC conductivity of the electrolyte. For that purpose, the PVA sample with LiClO4 inorganic salt was prepared with different concentration (0, 5, 10, 15 and 20)wt.% of LiClO4 salt and different thickness. XRD analysis of the sample reveals that PVA shows broad peak at 26=19.84° and degree of crystallinity decrease by adding the concentration of lithium salt.The electrical conductivity of the material is measured using LCR meter.The experimental results shows that the AC electrical conductivity increases with increasing the temperature and concentration of Li salt.The dielectric constant values of SPE decreases with increase in frequency and increases with increase in temperature. Maximum conductivity of PVA with 20% LiClO4 at 353K and frequency 500kHz is found to be 3.51*10-2 s/cm.