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

Manganese oxide (MnOx) 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 MnOx/CNT/Ni-foam electrode is beneficial to electrolyte penetration and ions exchange, whereas CNTs provide improved electronic conductivity. The MnOx/CNT/Ni-foam electrode with MnOx 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. (C) 2011 The Electrochemical Society. [DOI:10.1149/1.3562927] All rights reserved.