Two types of commercially available carbon blacks were studied by cyclic voltammetry and electrochemical impedance
spectroscopy as electrode materials for supercapacitors in the 0.5 M electrolyte of propylene carbonate and LiClO4. Specific
capacitances were calculated from cyclic voltammograms and impedance spectra were fitted, so resistance of electrode was
calculated. A correlation was found between specific capacity, electrode resistance and specific surface area of carbon materials