The preparation and performance of calcium carbide-derived carbon/polyaniline composite electrode material for supercapacitors

Calcium carbide (CaC2)-derived carbon (CCDC)/polyaniline(PANI) composite materials are prepared by in situ chemical oxidation polymerization of an aniline solution containing well-dispersed CCDC. The structure and morphology of CCDC/PANI composite are characterized by Fourier infrared spectroscopy (FTIR). scanning electron microscope (SEM), transmission electron microscopy (TIN) and N-2 sorption isotherms It has been found that PANI Was uniformly deposited on the surface and the inner pores of CCDC. The supercapacitive behaviors of the CCDC/PANI composite materials are investigated with cyclic voltammetry (CV), galvanostatic charge/discharge and cycle life measurements The results show that the CCDC/PANI composite electrodes have higher specific capacitances than the as grown CCDC electrodes and higher stability than the conducting polymers The capacitance of CCDC/PANI composite electrode is as high as 713.4 F g(-1) measured by cyclic voltammetry at 1 mV s(-1) Besides. the capacitance retention of coin supercapacitor remained 80 1% after 1000 cycles (C) 2009 Elsevier B.V. All rights reserved.