The mechanical strength of the poly(vinylidene fluoride) (PVDF) based polymer electrolyte deteriorates with increasing salt content For a salt concentration of 2 wt% the Youngs modulus is 10(-5) Pa. The Youngs modulus reduces by 60% when the salt concentration increases five-fold. The decrease in mechanical strength of the polymer electrolyte by the incorporation of the salt is attributed to the intramolecular interaction between the chains of the polymer and the salt. The mechanical strength of the polymer electrolyte was also analyzed for different plasticizer content. The plasticizer used was ethylene carbonate (EC). The Youngs modulus of the plasticized polymer electrolyte decreased with increase in EC content, but the elongation of the material and the energy at break increased with EC content, showing increased flexibility.