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Analysis of Dielectric, Modulus, Electro Chemical Stability of Pvp Absa Polymer Electrolyte Systems

R. S. Diana Sangeetha, P. Thillai Arasu, G. Hirankumar and R. S. Daries Bella

Protons conducting solid polymer electrolytes comprising Poly vinyl pyrrolidone (PVP) and 2- amino benzene sulphonic acid (2ABSA) have been prepared by solution casting method with different compositions. A dielectric spectroscopy study has been carried out on the polymer electrolytes to identify the optimised salt composition, which is having high ionic conductivity. The ionic transference number has been estimated by Wagner’s polarization method and the value is reported for all the samples (0.89- 0.98). The dielectric behaviours of the samples have been analyzed using dielectric permittivity and electric modulus. The dielectric spectra show the low frequency dispersion, which implies the space charge effects arising from the electrode-electrolyte interface. Studies of frequency dependence of modulus formalism suggest that the ionic and polymer segmental motion are strongly coupled. The electrochemical stability of the polymer electrolyte has been studied by linear sweep voltammetry using stainless steel as the blocking electrodes and the film electrochemically stable in 2.5 V.