Effect of PVAc Dispersal Into PVA-NH4SCN Polymer Electrolyte

The present paper deals with ion transport studies on a new proton conducting composite polymer electrolyte - (PVA(x):NH(4)SCN)(y):PVAc system. Complexation and morphology of the composite electrolyte films are discussed on the basis of X-ray diffraction and differential scanning calorimetry data. Coulometry and transient ionic current measurements revealed charge transport through protons. The maximum ion conductivity was found to be 7.4.10(-4) S.cm(-1) for the composition: x = 0.15, y = 0.12. The observed conductivity behaviour is correlated to the morphology of the films. The temperature dependence of the electrical conductivity exhibits Arrhenius characteristics in two different temperature ranges separated by a plateau region related to morphological changes occurring in the electrolyte.