Electrochemical Properties of Nanoporous Carbon Material in K⁺ -containing Aqueous Electrolytes

Abstract

The work is devoted to the study of the behavior of electrochemical systems in K+ - containing solvents. As theelectrode material nanoporous carbon material was used, obtained by carbonization of plant material. Optimization ofthe pore size distribution was carried out with chemical-thermal method using potassium hydroxide as an activator.Parameters of supercapacitors were studied on a set AUTOLAB PGSTAT 12 using software GPES and FRA-2.Structural and morphological studies were conducted on the scanning electron microscope JSM-6700F.It is shownthat the resulting materials have high values of capacity, which is realized by charge accumulation on the electricaldouble layer and through pseudo accumulation of ions on the surface of the material. It was established that theelectrochemical capacitors based on NVM are stable over the entire range current densities, and the capacity of thematerial essentially depends on the optimal choice of the electrolyte.Keywords: carbon material, aqueous electrolyte, capacity, voltage drop.