Polyvinyl alcohol/ammonium iodide/ionic liquid-4-ethyl-4-methylmorpholiniumbromide based polymer electrolytes and its application in electric double layer capacitor

In this study, we have synthesized solid polymer electrolytes using polyvinyl alcohol as a host polymer that has been doped with ionic liquid and ammonium iodide. Impedance spectroscopy revealed that the increase in ionic liquid doping increased the ionic conductivity of the PVA-NH4I complex. The crystalline nature of the polymeric films was studied using polarized optical microscopy and x-ray diffraction. To confirm the blending ability of polymer electrolyte, Fourier transform infrared spectroscopy was also used. Finally, a supercapacitor was fabricated using the highest conducting IL-doped polymer electrolyte which demonstrates a specific capacitance of 97 F/g with a stable efficiency.