Abstract Recently, spinel-type binary metal oxides have attracted enormous interest in energy storage devices. In supercapacitors improving energy density is still challenging task and the composite nanostructures are found to address this issue in some extent. Herein, a composite nanostructure based on ZnCo2O4/CdS was synthesized on nickel foam using hydrothermal and successive ionic layer adsorption and reaction (SILAR) methods. A hydrothermally synthesized ZnCo2O4 nanoflowers were coated by CdS nanoparticles by varying SILAR cycles and studied its electrochemical performance. The ZnCo2O4/CdS nanostructured electrode with optimized four SILAR cycles of CdS coating exhibited a high areal capacity, energy density and power density of 2658 mCcm-2, 517 μWhcm-2 and 17.5 mWcm-2 at 25 mA, which is higher than pristine ZnCo2O4. This work show ZnCo2O4/CdS nanostructure is a favorable electrode for supercapacitors.

中文翻译：

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基于ZnCo2O4/CdS复合纳米结构设计混合电池型超级电容器的全化学途径

摘要 近年来，尖晶石型二元金属氧化物引起了储能器件的极大兴趣。在超级电容器中，提高能量密度仍然是一项具有挑战性的任务，发现复合纳米结构在一定程度上解决了这个问题。在这里，使用水热和连续离子层吸附和反应（SILAR）方法在镍泡沫上合成了基于 ZnCo2O4/CdS 的复合纳米结构。通过不同的 SILAR 循环，水热合成的 ZnCo2O4 纳米花被 CdS 纳米粒子包覆，并研究了其电化学性能。具有优化的四个 SILAR 循环的 CdS 涂层的 ZnCo2O4/CdS 纳米结构电极在 25 mA 下表现出 2658 mCcm-2、517 μWhcm-2 和 17.5 mWcm-2 的高面积容量、能量密度和功率密度，高于原始 ZnCo2O4 .