High Energy Density Polyaniline/Exfoliated Graphite Based Supercapacitor with Improved Stability in Wide Voltage Window

Abstract

In this work, polyaniline/exfoliated graphite-based conducting polymer composites have been prepared and brought under speculation to improve the stability at a high voltage window, ultimately improving the material's supercapacitance behavior. The specific capacitance of 356 F/g at a scan rate of 10 mV/s in the potential window -1V to +1V and cycling retention 82 % after 1000 cycles using aqueous electrolyte (0.1 M Na2SO4) at ambient condition is reported. The energy density and power density are found to be 318 Wh/kg and 12.5 kW/kg, respectively, at a specific current density of 12.5 A/g. The developedcomposite is stable, even at high voltage. This composite obtained is low cost and is stable in aqueous solutions in a wide voltage window.