Hierarchical NiO Nanoflake Arrays on Nickel Foam as a Supercapacitor Electrode with High Capacitance and High Rate Capability

作者：Yang, Guangwu^*; He, Bing; Guo, Wenyue; Zhao, Lianming; Xue, Qingzhong; Li, Hulin

来源：Journal of Nanoscience and Nanotechnology, 2016, 16(4): 4169-4173.

DOI：10.1166/jnn.2016.11398

• Hierarchical Structure
• Electrodeposition
• Nickel Oxide
• Thin Films
• Supercapacitor

In this paper, we report a simple and cost-effective method for fabricating hierarchical NiO nanoflake arrays on nickel foam. X-ray diffraction, scanning electron microscope and transmission electron microscope are employed to study the morphology and structure of the as-synthesized NiO materials. Galvanostatic charge/discharge measurements demonstrate that the hierarchical NiO nanocomposite displays excellent capacitive behavior between the potential range of-0.1-0.5 V, and a maximum specific capacitance as high as 823 F g(-1) can be achieved at a charge/discharge current density of 4 A g(-1), and it only decreases by 20% when the current density increases to 12 A g(-1). The remarkable electrochemical performance of this hierarchical NiO nanocomposite indicates the great application potential in supercapacitors.

• 出版日期2016-4
• 单位中国石油大学（北京）; 山东大学; 兰州大学; 中国石油大学（华东）