AC Conductivity and Conduction Mechanism of Iron (II) Chloride (FeCl2) /Poly (vinyl alcohol) (PVA)/Poly (vinylpyrroldone) (PVP) Polymer Blend Electrolyte

Abstract

Blend sample based on Poly (vinyl alcohol) (PVA)/Poly (vinylpyrroldone) (PVP), (50:50), and their blend electrolyte with different weigh ratio of Iron (II) Chloride (FeCl2), (0.5, 1 and 2 wt.%), have been prepared using casting method. The AC electrical properties of these samples were investigated in the frequency range 1 kHz to 1 MHz and in temperature ranging from 30 to 150 °C. The real and imaginary impedance, frequency and temperature dependence, indicate the enhancement of the electrical conductivity of the blend due to addition of FeCl2. Pure and electrolyte blend samples were found to be characterized by a plateau region at low frequency and high temperature, and this plateau region increases with increase in temperature and /or FeCl2 weight ratio. Nyquist plots for pure and blend electrolyte samples presented depressed semicircles at all temperatures. For pure blend sample, the ac conductivity was attributed to hopping mechanism while for blend electrolyte sample ionic conduction represents the predominant conduction mechanism. Jonscher universal power law was used to study the conduction mechanism for pure and electrolyte blend sample. The activation energy for blend and blend electrolyte samples was calculated and two activation regions were appeared for blend electrolyte samples.

Nanoparticle-Embedded Polymers and Their Applications: A Review

“…The nature of operation of the polymeric membranes changes as the pores decrease. As the size of the membrane pores approaches the sub-nanometer scale, other mechanisms, such as the Donnan effect and confined mass transport effects, become increasingly significant in determining the behavior and performance of the polymeric membranes [ 14 ]. Membranes using reverse osmosis, pervaporation, and gas separation mechanisms will allow molecules to pass through them as guided by the mechanism of solution–diffusion.…”