Preparation and electrochemical properties of coriander-derived carbon-based material
Waste cilantro is a promising carbon source as it is rich in heterogeneous elements and widely grown and easily accessible.Coriander-derived porous carbon materials(CDPCs)were successfully synthesized by a facile carbonization activation treatment.By adjusting the activation ratio of KOH and carbon materials,three mixed-ratio samples were prepared to explore the electrode materials for optimal supercapacitor performance.Electrochemical tests performed under the three-electrode system showed that the specific capacitance of the CDPC4-1 electrode could reach 316 F·g-1 at a current density of 1 A·g-1.The capacitance remained 70.9%at current densities up to 15 A·g-1,after 5 000 charge/discharge tests at this current density,99.8%of the initial capacitance was maintained.This green and renewable electrode material has a broad prospect in the field of supercapacitor energy storage.