Abstract Electrode materials are crucial for the electrochemical performance of supercapacitors. Thus, it is urgent to develop a satisfactory electrode material with excellent energy storage properties. Binary metal hydroxides are competitive candidates for supercapacitors. Herein, we prepared honeycomb-like NiCo(OH)2 nanosheet arrays grown on nickel foam by a facile one-step solvothermal method. The electrochemical performance of as-prepared honeycomb-like NiCo(OH)2 nanosheet arrays as electrode materials for supercapacitor have been evaluated. The NiCo(OH)2 electrode exhibits higher areal capacity (267 mF cm−2) compared with Ni(OH)2 (31.2 mF cm−2) and Co(OH)2 (87.73 mF cm−2) at the current density of 20 mA cm−2. The capacity retention can up to 83.8% after 5000 cycles. Such intriguing electrochemical performance enables it to be a potential electrode material for supercapacitors.

中文翻译：

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增强蜂窝状层双氢氧化物纳米片作为超级电容器的高级电极

摘要 电极材料对超级电容器的电化学性能至关重要。因此，迫切需要开发一种令人满意的具有优异储能性能的电极材料。二元金属氢氧化物是超级电容器的竞争候选者。在此，我们通过简便的一步溶剂热法制备了在泡沫镍上生长的蜂窝状 NiCo(OH)2 纳米片阵列。已经评估了制备的蜂窝状 NiCo(OH)2 纳米片阵列作为超级电容器电极材料的电化学性能。与 Ni(OH)2 (31.2 mF cm-2) 和 Co(OH)2 (87.73 mF cm-2) 相比，NiCo(OH)2 电极在电流密度为20 毫安 cm−2。5000次循环后容量保持率可达83.8%。