Organic Asymmetric Supercapacitor Based on Activated Porous Carbon Supported Polyaniline and Activated Porous Carbon Electrodes

Activated porous carbon (aHPC) with large surface area is fabricated by the KOH activation method,and the porous aHPC supported polyaniline nanocomposite (aHPC@PANI) is fabricated by the in-situ chemical oxidation method.The organic asymmetric supercapacitor is further designed using aHPC as negative electrode and aHPC@PANI as positive electrode in the Et₄NBF₄-AN electrolyte.The electrochemical tests show that aHPC@PANI and aHPC deliver the specific capacitance of 256.7 F/g(-0.6~0.8 V) and 152.4 F/g(-2~-0.6 V) at the current density of 1 A/g,respectively.The as-synthesized organic asymmetric supercapacitor achieves wide potential window (2.8 V),high energy density (56.2 W·h/kg at the power density of 0.75 kW/kg),and excellent cycling stability (the specific capacitance retention is 92.4% after 5 000 cycles).