Ionic conductivity and dielectric permittivity of polymer electrolyte plasticized with polyethylene glycol

Abstract

We have studied ionic conductivity and dielectric permittivity of PEO-LiClO4 solid polymer electrolyte plasticized with polyethylene glycol (PEG). The temperature dependence of the ionic conductivity has been well interpreted using Vogel-Tamman-Fulcher equation. The maximum dielectric constant is observed for 30 wt. % of PEG content. To get further insights into the ion dynamics, the complex dielectric permittivity has been studied with Havriliak–Negami function. The variation of relaxation time with inverse temperature obtained from HN formalism follows VTF nature.