Increased working voltage of hexamine-coated porous carbon for supercapacitors

摘要: Highly porous carbon, both unmodified and hexamine-coated on the pore surfaces, is tested at high working voltages in organic electrolyte for supercapacitors order to enhance energy density power density. Sol–gel processing allows excellent control of structure chemical composition resulting a material with surface area low level impurities. This carbon can be modified using simple solution-based method capacitance. Increasing voltage from 2.0 3.0 V significantly improves performance carbon. The increase higher voltage, under certain conditions, capacitance increases as well. Cyclic stability also investigated, retaining more its initial than all voltages.