An asymmetric supercapacitor with anthraquinone and dihydroxybenzene modified carbon fabric electrodes

An asymmetric electrochemical capacitor with an enhanced energy density has been constructed by using carbon fabric electrodes modified with complementary functionality; anthraquinone for the negative electrode and 1,2-dihydroxybenezene for the positive electrode. Cyclic voltammetry and constant current discharging were used to evaluate the performance of a supercapacitor with 1 M H2SO4 electrolyte and a Nation separator. Energy densities were found to be double the values obtained for a symmetric device with two unmodified carbon fabric electrodes. (C) 2010 Elsevier B.V. All rights reserved.