Fabrication horizontal aligned MoO2/single-walled carbon nanotube nanowires for electrochemical supercapacitor

The horizontally aligned MoO₂/single-walled carbon nanotube (MoO₂/SWNT) composite has been prepared by electrochemically induced deposition method which utilizes the good electronic conductivity of SWNTs as supporting material to deposit MoO₂. The morphology and crystal structure of the composite were investigated by X-ray photoelectron spectroscopy and scanning electron microscopy, respectively. The capacitive properties of the MoO₂/SWNT composites have been investigated by cyclic voltammetry (CV). A specific capacitance (based on MoO₂) as high as 597 F g^− 1 is obtained at a scan rate of 10 mV s^− 1 in 0.1 M Na₂SO₄ aqueous solution. Additionally, the MoO₂/SWNT composites electrode shows excellent long-term cycle stability (only 2.5% decrease of the specific capacitance is observed after 600 CV cycles).