Mesoporous biochar derived from silkworm excrement for high-performance supercapacitors

Abstract

In this work, Preparation of mesoporous carbon materials (Original-SE) by high temperature carbonization of biomass materials derived from silkworm has been successfully fabricated as high-performance and wide potential window electrodes for supercapacitors. pickling mesoporous carbon materials (Pickling-SE) are obtained from mesoporous carbon materials (Original-SE) via chemical (HCL) method. It is interesting that the pickling mesoporous carbon materials possesses a higher specific surface area of 293.97 m2/g than that of 112.64 m2/g for mesoporous carbon materials. A more excellent electrochemical performance of a specific capacitance of 291.5 F/g for Pickling-SE electrodes than that 208.3 F/g for Original-SE electrodes at 1A/g in 1M Li2SO4 electrolyte, and a higher stability for Pickling-SE electrodes (97.2%) than Original-SE electrodes (91.1%) over 5000 cycles.