期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 876, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.160164
关键词
Hybrid supercapacitor; Hydrothermal method; Nanocomposite; Nanorod; Core-shell structure
资金
- National Natural Science Foundation of China [21978198]
The core-shell NiSe@alpha-Ni(OH)2 structure, prepared on Ni-foam via a facile two-step hydrothermal synthesis, exhibits excellent performance and stability in supercapacitors due to its unique architecture.
In this study, core-shell NiSe@alpha-Ni(OH)2 with NiSe nanorod wrapped in alpha-Ni(OH)2 nanosheet is successfully prepared on Ni-foam via a facile two-step hydrothermal synthesis. Ni-foam takes the roles of the conductive substrate and source of Ni during the synthesis of NiSe. Thus the strong adhesive force between the asprepared NiSe and Ni-foam is formed, making the nanorod become a bridge to facilitate electron transfer and a skeleton to support alpha-Ni(OH)2 nanosheet. Utilizing the comprehensive advantages of the core-shell architecture and compositional features, the obtained NiSe@alpha-Ni(OH)2 exhibits an areal capacity of 1.780 mAh cm & minus;2 at the current density of 3 mA cm & minus;2 and an excellent rate capability. The assembled hybrid supercapacitor NiSe@alpha-Ni(OH)2//AC exhibits an energy density of 55.92 Wh kg & minus;1 at the power density of 186.9 W kg & minus;1, and 75.10% of the initial capacity is retained after 4500 cycles. (c) 2021 Elsevier B.V. All rights reserved.
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