Structural and AC Impedance Analysis of  Blend Polymer Electrolyte Based on PVA  and PAN

S. Siva devi; S.Selvasekarapandian; S.Karthikeyan; N.Vijaya; F. Kingslin Mary Genova; C.Sanjeeviraja

Volume : II, Issue : X, October - 2013

Structural and AC Impedance Analysis of Blend Polymer Electrolyte Based on PVA and PAN

S. Siva Devi, S. Selvasekarapandian, S. Karthikeyan, N. Vijaya, F. Kingslin Mary Genova, C. Sanjeeviraja

Abstract :

Synthesis and characterization of new polymer electrolytes for electrochemical applications is one of the topics of current research. In this work, polymer electrolytes are prepared by blending two polymers Polyvinylalcohol (PVA) and Polyacrylonitrile (PAN) of different compositions by solution casting method using DMF as solvent. The prepared polymer films are characterized by X Ray Diffration and AC impedance spectroscopic techniques. XRD analysis shows the amorphous nature of the electrolytes. AC impedance analysis gives conductivities of the electrolytes. The highest conductivity at room temperature (303K) has been found to be 1.2x10–7 S cm–1 for 92.5PVA–7.5PAN system. The activation energy calculated for blend polymer electrolytes have been found to vary from 0.1 to 0. 21eV. The loss tangent curves for the samples reveal the presence of low frequency relaxation peaks which shift towards high frequency at high temperature.