Improvement of supercapacitor parameters by nickel ion intercalation into activated carbon

The relation between the porous structure and the electron structure in carbon materials was investigated in order to optimize the efficiency of the physical-chemical processes in an electric double layer (EDL) formed at the boundary between the carbon material and the electrolyte (KOH 30 % aqueous solution). In particular, an Ni2+ intercalative modification of nanoporous carbon resulted in more than a triple increase in the specific capacitance and a significant improvement of the charge-discharge kinetics in the EDL.