Biomass-Derived Ternary Heteroatoms Tailored Porous Carbon for High-Performance Supercapacitor
摘要
Modern technology research is more focused on renewable, sustainable, and affordable clean energy (SDG 7). Biomass, is one of the promising renewable and sustainable sources of energy, owing to its abundant availability and process simplicity. In this work, carbonaceous material processed from waste biomass was used as an electrode material in supercapacitors for energy storage. Porous-activated carbon was prepared from waste Artocarpus hirsutus seeds through chemical activation with phosphoric acid as an activating agent. The chemically activated carbon was further doped with a combination of heteroatoms N, Si, and Ti through a solvothermal process to enhance the electrical conductivity of the material. The doped electrode material showed outstanding electrochemical performance with a specific capacitance of 974.6 F g−1 at a current density of 1 A g−1 in a three-electrode system. The asymmetric supercapacitor device exhibited an energy density of 27 Wh kg−1, a power density of 2700 W kg−1, and excellent cycling stability of 94.5% initial capacitance retention after 5000 charge–discharge cycles at a current density of 1 A g−1. Thus, the biomass-derived carbonaceous material is a capable energy storage material for supercapacitor applications.