High Performance Supercapacitor Based on Self-heteroatom-doped Porous Carbon Electrodes Fabricated from Mikania Micrantha

Abstract

Abstract Applications, economic advantage, and effective waste management have sparked much interest in porous carbon compounds synthesized from renewable and biowaste resources. Self-heteroatom-doped carbon compounds have recently been made using various biological precursors. This study investigates the ease of preparing biomass-derived porous carbon (BPC) matrices from raw and verdant Mikania micrantha leaves using a direct activation and pyrolysis procedure. With the aid of preactivation and pyrolysis, BPC materials can be synthesised with a high surface area and pore volume. At a current density of 1 A/g, the BPC materials MM-700 exhibit a specific capacitance of 393 F/g. Interestingly, the MM-700 BPC materials have a greater capacitive contribution to charge accumulation during the electrochemical reaction. The BPC material MM-700 solid-state device manufactured with a PVA-H2SO4 gel electrolyte has a specific capacitance of 119 F/g at 1 A/g current density and a power density of 13,284 kW/kg at 30 A/g current density. Even at a high current density of 30 A/g, the synthesized porous carbon materials retain a high specific capacitance. Moreover, the MM-700 BPC material exhibits outstanding stability in both three- and two-electrode systems in strong acidic electrolyte.