Development of an ordered mesoporous carbon/MoO_2 nanocomposite for high performance supercapacitor electrode

摘要

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 MoO2 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.