Ultrasonic synthesis and electrochemical characterization of V2O5/mesoporous carbon composites

V2O5/ordered mesoporous carbon (CMK-3) composites were prepared by an ultrasonic method. The microstructures of such composites were characterized by X-ray diffraction (XRD), nitrogen adsorption and desorption, X-ray photoelectron spectra (XPS) and transmission electron microscopy (TEM). The results showed that the ultrasonic synthesis method was flexible and efficient to highly disperse V2O5 nanoparticles in CMK-3. The electrochemical property of the V2O5/CMK-3 composites has also been investigated. The specific capacitance of the new composites was significantly improved (124 F/g) compared to that of CMK-3 (77 Fig). The high capacitance was mainly derived from the high specific surface area of CMK-3 and the pseudo-capacitance of V2O5. Therefore, the V2O5/CMK-3 composites can be a potential electrode material applied in the capacitors. (C) 2009 Elsevier Inc. All rights reserved.