期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 685, 期 -, 页码 384-390出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.05.287
关键词
Nickel telluride; Asymmetric supercapacitor; Activated carbon; Pseudocapacitance
资金
- National Natural Science Foundation of China [U1205112, 21301060, 61306077]
- Doctoral Supervisor Project of Chinese Ministry of Education [20123501110001]
- Promotion Program for Young and Middle-aged Teacher in Science and Technology Research of Huaqiao University [ZQN-PY106]
Nickel telluride (NiTe) rods are grown on Ni foam substrate by a simple hydrothermal route. The electrochemical properties of NiTe electrode are evaluated by cyclic voltammograms (CV), galvanostatic charge/discharge (GCD) tests. The prepared NiTe electrode shows a specific capacitance of 804 F g(-1) at the current density of 1 A g(-1) and remarkable cycling stability. In order to improve the energy density and broaden the potential window, an asymmetric supercapacitor containing NiTe as positive electrode and activated carbon (AC) as negative electrode in 3 M KOH electrolyte is assembled. The fabricated asymmetric supercapacitor can work in the voltage range of 0-1.6 V and displays high energy density of 33.6 Wh kg(-1) at a power density of 807.1 W kg(-1). Additionally, the AC//NiTe asymmetric supercapacitor shows good rate capability and cyclic durability. (C) 2016 Elsevier B.V. All rights reserved.
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