NiMoO4@Co(OH)2 core/shell structure nanowire arrays (NWAs) supported on Ni foam were successfully fabricated via a facile hydrothermal growth and electrochemical deposition route, and applied in supercapacitors (SCs). The smart combination of Co(OH)2 and NiMoO4 nanostructures in nanowire arrays exhibited greatly enhanced electrochemical performance. Co(OH)2 nanoflakes were uniformly wrapped on the surface of each NiMoO4 nanowire, which increased the capacitance of NiMoO4 NWAs to a high areal capacitance of 2.335 F cm−2 at 5 mA cm−2 and 0.909 F cm−2 at 50 mA cm−2. The electrode also exhibited good cycling ability; 83% of the initial capacity was retained after 5000 cycles at a current density of 20 mA cm−2. These results indicate that the NiMoO4@Co(OH)2 NWAs could be a promising electrode material for high-performance electrochemical capacitors.
