Development of an Ordered Mesoporous Carbon/MoO2 Nanocomposite for High Performance Supercapacitor Electrode

An ordered mesoporous nanocomoposite of carbon-MoO 2 was prepared by incorporation of Mo precursor into mesopores of ordered mesoporous carbon after acid treatment. In spite of crystal growth, inner mesopores of the carbon were covered by MoO 2 , which was attributed to strong interaction between the Mo precursor and the acidified carbon surface. When applied into supercapacitor electrode, an improved volumetric capacitance (216 F cm −3 ) and a very high pseudocapacitance by MoO 2 itself (622 Fg −1 ) were obtained, indicative of an efficient capacitive utilization of MoO 2 within carbon mesopores. Because of the characteristic nanostructure, furthermore, rate capability and cycle performance were improved.