High-performance supercapacitor electrode based on 3D rose-like β-Ni (OH)2/rGO nanohybrid
High-performance supercapacitor electrode based on 3D rose-like β-Ni (OH)2/rGO nanohybrid
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DOI：
10.1016/j.jpcs.2019.109297
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发表时间：
2020-03-01
影响因子：
4
通讯作者：
Liu, Hui
中科院分区：
文献类型：
--
作者：
Liu, Junli;Wang, Yuhan;Liu, Hui
超级电容器以其优异的性能，近年来被广泛应用于电力存储和电源管理等领域。本文采用一步水热法制备了新型三维玫瑰状beta-Ni（OH）（2）/rGO纳米杂化物作为超级电容器电极。所制备的Ni（OH）（2）/rGO纳米杂化物表现出直径约3 μ m的玫瑰状形貌，其由氢氧化镍和还原的氧化石墨烯片层均匀重叠组装而成。在这种状态下，石墨烯均匀地分布在纳米杂化材料的内部，而不是作为基底。电化学测试结果表明，Ni（OH）2/rGO纳米杂化材料在2 A/g时的比容量可达802 F/g。当电流密度为8A/g时，恒流充放电1000次后，电容量仍保持94.55%。它显示出优越的上级循环稳定性。此外，3D Ni（OH）（2）/rGO纳米杂化物可以简单地转化为NiO/rGO纳米杂化物。这些工作对于新型超级电容器电极和储能元件的研究和开发具有重要意义。
Supercapacitors have been extensively used in power storage and power management components for its outstanding performances in recent years. In this paper, the novel 3D rose-like beta-Ni(OH)(2)/rGO nanohybrid is prepared as supercapacitor electrode through one-step hydrothermal method. The prepared Ni(OH)(2)/rGO nanohybrid exhibited a rose-like morphology with a diameter of about 3 mu m, which were assembled from sheets of nickel hydroxide and reduced graphene oxide layered overlap uniformly. In this state, graphene distributed uniformly around the interior of nanohybrid instead of acting as a substrate. The results of electrochemical test show that the specific capacity of Ni(OH)(2)/rGO nanohybrid could achieve to 802 F/g at 2 A/g. Furthermore, when the current density is 8 A/g, the capacitance still preserved 94.55% after 1000 times constant current charge and discharge. It displays superior cycle stability. Additionally, 3D Ni(OH)(2)/rGO nanohybrid could be simply transmitted to NiO/rGO nanohybrid. These works are of crucial importance for the research and development of novel supercapacitor electrodes and power storage components.