γ-Mo2N/Co3Mo3N composite material for electrochemical supercapacitor electrode

A novel class of electrochemical supercapacitors electrode material has been synthesized using temperature-programmed reaction (TPR) COMoO4 precursors prepared using a mixture of an aqueous solution of Co(NO3)(.)6H(2)O and (NH4)(6)Mo(7)O(24)(.)4H(2)O with ammonia. This material was physically and chemically characterized by X-ray diffraction microscopy (XRD), scanning electron microcopy (SEM), and cyclic voltammetry (CV). CV characterization indicated fast kinetics for charge-discharge process as well as good kinetic reversibility. The material provided 109.9 F g(-1) specific capacitance over a potential window of about -0.25 +/- 0.55 V versus saturation calomel reference electrode (versus SCE) in aqueous electrolyte. It is, therefore, a possible candidate as material applicable for electrochemical supercapacitors electrode. (c) 2005 Elsevier B.V. All rights reserved.