Abstract
Transition-metal oxides or hydroxides on nanostructured supports have been regarded as promising electrode materials for high-performance supercapacitors due to their high power density, good energy density, excellent cycle stability, and long lifetime. In this work, a high-performance supercapacitor based on NixCo1-x(OH)2 nanoflakes modified ZnO nanowires (NWs) was developed. The ZnO NWs were synthesized on carbon fiber (CF) by chemical bath deposition, followed by pulse electrodeposition of NixCo1-x(OH)2 nanoflakes on the surface of ZnO NWs. The effects of the electrodeposition conditions along with the precursor variables were systematically investigated. The NixCo1-x(OH)2/ZnO NWs/CF hybrid nanostructure fabricated under the optimal conditions has exhibited a specific capacitance of 880.5 F/g, good rate capability, and cycling stability.