Facile synthesis and characterization of high-performance NiMoO4 · xH2O nanorods electrode material for supercapacitors

Abstract

One-dimensional NiMoO4 · xH2O nanorods were synthesized by a facile template-free hydrothermal method as a potential electrode material for supercapacitors. The influences of reaction temperature, reaction time, and nickel source on the properties of resultant samples were investigated. Electrochemical data reveal that the as-synthesized one-dimensional NiMoO4 · xH2O nanorod superstructures can deliver a remarkable specific capacitance (SC) of 1131 F g−1 at a current density of 1 A g−1 and remain as high as 914 F g−1 at 10 A g−1 in a 6 M KOH aqueous solution. Moreover, there is only 6.2 % loss of the maximum SC after 1000 continuous charge–discharge cycles at the high current density of 10 A g−1. Such outstanding electrochemical performance may be owing to the unique one-dimensional hierarchical structures, which can facilitate the electrolyte ions and electrons to easily contact the NiMoO4 nanorod building blocks and then allow for sufficient faradaic reactions to take place, even at high current densities.