Nanoporous Nitrogen-containing Coal for Electrodes of Supercapacitors

摘要

Chemical activation of nanoporous carbon material with nitric acid followed by activation in a stream of argon at different temperatures initiates formation of amide, pyrrole and pyridine nitrogen compounds on the surface of the material. These activations will improve hydrophilic properties and increase electrical conductivity of the given material. Value of the specific capacitance of the N-enriched carbon material in an aqueous KOH solution can be increased by 30%, and additional heat treatment in the temperature range 440...460 °C will heighten this value by another 10%.