Polymer electrolyte films of (PMMA +DMF+TiO2 ) with NaClO4 have been prepared by solution cast technique. The features of complexation of the electrolytes were studied by X-ray diffraction (XRD). DC conductivity of the films was measured in the temperature range 303-393 K. In the temperature range studied, three regions with different activation energies were observed. Transference number data showed that the charge transport in this system is predominantly due to ions only. Electrochemical cells of configuration Na/(PMMA +DMF+TiO2+ NaClO4)/(I2+C+electrolyte) were fabricated and the discharge characteristics of these cells were studied under a constant load of 100K. The open circuit voltage, short circuit current and discharge time for plateau region were measured. Several other cell parameters evaluated and are reported
