Structural and ionic conductivity studies on P(ECH-EO):γ-BL:LiClO4 plasticized polymer electrolyte

The plasticized polymer electrolyte consisting of poly(epichlorohydrin-ethyleneoxide) [P(ECH-EO)], lithium perchlorate (LiClO4) and gamma-butyrolactone (gamma-BL) have been prepared by simple solution casting technique. The polymer-salt-plasticizer complex has been confirmed by XRD analysis. The ionic conductivity studies have been carried out using AC impedance technique. The effect of plasticizer (gamma-BL) on ionic conductivity has been discussed with respect to different temperatures. The maximum value of ionic conductivity is found to be 1.3x10(-4) Scm(-1) for 70P(ECH-EO): 15 gamma-BL:15LiClO(4) at 303 K. The temperature dependence of the plasticized polymer electrolyte follows the Vogel-Tamman-Fulcher formalism. The activation energy is found to decrease with the increase in plasticizer.