Influence of Lithium Salt Concentration on PAN-PMMA Blend Polymer Electrolytes

Polymer blend electrolytes are prepared for various concentration of LiClO4 salt with the constant ratio of PAN and PMMA polymers using solution casting technique. The structural and complex formations of the basic constituents and their complexes are analyzed by XRD and FTIR spectroscopic techniques. The effect of salt concentration on the ionic conductivity and the temperature dependence of ionic conductivity in the range 302-373K have been studied using ac impedance spectroscopy analysis. The maximum ionic conductivity value is found to be of the order of 0.562 x 10-5 Scm-1 for the film containing PAN (75 wt.%) PMMA (25wt.%) with LiClO4 (wt.8%). The thermal behaviours of the films are ascertained from thermo gravimetric analysis and differential scanning calorimetry. The sample exhibits higher ionic conductivity has also been subjected to scanning electron microscopy inorder to study the micro structure of the electrolyte system.