Extraction of Carbon from Biomass-Based Bamboo and Coconut Husk for Enhancement of High-Performance Supercapacitor

It is necessary to explore new energy storage materials. Activated carbon-based electrode materials are promising for application in fuel cell, batteries, and supercapacitor supporting electrode material. Carbon is one of the most significant contents in EDLC (Electric double-layer capacitor). Modification of biomass waste material into renewable low-cost carbon materials has become a subject of great interest. To make enhancements within this domain we are utilizing carbon produced from biomass. In this work, we are using coconut husk and bamboo as our biomass to derive carbon from it by torrefaction and carbonization methods. The biomass-derived carbon was further characterized for its morphological using scanning electron microscope. The electrochemical properties of the as-synthesized material were done using cyclic voltammetry (CV), galvanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS). The electrochemical results for biomass bamboo (BB-400) derived carbon and coconut husk biomass (CHB) derived carbon revealed highest specific capacitance of 188 and 124 Fg−1 at the lowest current density of 0.5 and 1 Ag−1 respectively. BB-400 and CHB exhibited higher energy density of 7.91 and 5.2 Wh kg−1 at power density of 68.71 and 68.57 W kg−1 respectively.