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