AbstractThe purpose of this research is to study the ionic conductivities of gel polymer electrolytes (GPEs) and composite solid polymer electrolytes (CSPEs) for tin-air battery application based on polyacrylamide as host polymer. Methanesulfonic acid and p-toluenesulfonic acid were used as additives. Electrochemical impedance spectroscopy (EIS) was used to measure the ionic conductivities of the samples by using the bulk electrolyte resistance values (Rb). The FTIR spectra were analyzed to describe the mechanism involved in the proton transfer within the membranes by referring to the characteristic shifts of the absorbance bands of C=O and N-H2. Tin-air batteries, with a configuration of Sn(anode)/GPE/ air(cathode) were fabricated to study the electrochemical properties of the GPEs. The batteries were discharged at various constant of current densities. The results showed that the maximum ionic conductivities of 7.0 x 10-1 S/cm and 9.34 x 10-1 S/cm were obtained for GPEs at a loading of 3.0 M.....