Abstract
In this work, a series of carbon cloth supported Co1-xNixWO4 nanostructures (CC@Co0.9Ni0.1WO4) were successfully prepared via a facile one-step hydrothermal method. The obtained Co1-xNixWO4 samples can be directly used as the binder-free electrodes for supercapacitors. The optimal CC@Co0.9Ni0.1WO4 nanostructured sample shows excellent electrochemical performance in 1 mol⋅L−1 KOH aqueous solution with a high specific capacitance of 430.3 F g−1 at a current density of 1 A g−1 and 316.5 F g−1 at 3 A g−1, and excellent cycling ability (85.4% retention over 5000 cycles). The superior electrochemical performance could be attributed to the direct and intimate contact between nanostructured Co1-xNixWO4 and carbon cloth, which could greatly improve the charge transfer rate due to the enhanced electrical conductivity and ion diffusion efficiency. This work would provide a new paradigm of the design and synthesis of high-performance electrode materials for aqueous electrolyte based electrochemical energy storage devices.
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