Electrodeposited Manganese Oxide on Nickel Foam–Supported Carbon Nanotubes for Electrode of Supercapacitors

Manganese oxide (MnO(x)) has been electrodeposited on the nickel foam-supported carbon nanotubes (CNTs) and fabricated as the supercapacitor electrode. The three-dimensional (3D) hierarchically porous microstructure of the as-fabricated MnO(x)/CNT/Ni-foam electrode is beneficial to electrolyte penetration and ions exchange, whereas CNTs provide improved electronic conductivity. The MnO(x)/CNT/Ni-foam electrode with MnO(x) loading mass of 100 mu g shows a high specific capacitance (SC) of 462 F g(-1) with good long cycle stability at a current density of 5 A g(-1), suggesting that it is a promising candidate for supercapacitor electrode.