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.

中文翻译：

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用于高性能电化学电容器电极的碳布支撑的 Co1-xNixWO4 纳米结构

摘要 在这项工作中，通过简便的一步水热法成功制备了一系列碳布负载的 Co1-xNixWO4 纳米结构（CC@Co0.9Ni0.1WO4）。获得的 Co1-xNixWO4 样品可直接用作超级电容器的无粘合剂电极。最佳CC@Co0.9Ni0.1WO4纳米结构样品在1 mol·L-1 KOH水溶液中表现出优异的电化学性能，在1 A g-1和316.5 F g的电流密度下具有430.3 F g-1的高比电容-1 at 3 A g-1，以及出色的循环能力（5000 次循环后保持率为 85.4%）。优异的电化学性能可归因于纳米结构的 Co1-xNixWO4 与碳布之间的直接和密切接触，由于增强的导电性和离子扩散效率，可以大大提高电荷转移速率。