Rice husk char as a potential electrode material for supercapacitors

Rice husk char (RHC), a carbon-based material, was obtained by thermal decomposition of rice (RH) biological waste. Physicochemical properties RHC were determined using XRD, FTIR, FESEM, TGA, N2 adsorption-desorption studies and contact angle mea­surement. A lab-scale supercapacitor (SC) fabricated as-prepared its super­capa­citive behaviour investigated techniques like CV, GCD EIS studies. Each electrode showed specific capacitance 80.2 F g-1 at the constant charging/disharging current density 0.05 g-1. exhibited 90 % retention initial even after 5000 GCD. The presence amorphous SiO2 in could contribute to excellent wettability towards water, enhancing effective sur­face area improving access electrolyte ions into RHC. This remarkable super­capa­citi­ve performance waste-derived demonstrates potential as cost ef­fecttive environ­mentally benign material for aqueous electrolyte-based SCs.