Carbon based materials: their properties and application as electrodes in electrochemical double layer capacitors

Abstract

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