The TiN nanowire arrays (TiN NWAs) were prepared by hydrothermal treatment of Ti foil and subsequent nitridation through ammonia annealing, on which Ni(OH)(2) was electrodeposited to form hierarchical TiN@Ni(OH)(2) core/shell nanowire arrays (TiN@Ni(OH)(2) NWAs). The electrochemical behaviors of TiN@Ni(OH)(2) NWAs were measured by cyclic voltammetry (CV) and galvanostatic charge-discharge, which shows very high specific capacitance (2680 F g(-1) at 6 A g(-1) in 2 M KOH aqueous solution) and good rate capability (54% capacity retention at 60 A g(-1)). These results demonstrate that the TiN@Ni(OH)(2) NWAs nanostructure is very promising for high performance supercapacitors. (c) 2013 Elsevier Ltd. All rights reserved.