期刊
JOURNAL OF POWER SOURCES
卷 308, 期 -, 页码 29-36出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.01.041
关键词
Supercapacitors; Nickel hydroxide nanoflakes; Pulse electrodeposition; ZnO nanowires; Nanocomposites
资金
- National Science Council of Taiwan [99-2119-M-007-007-MY3, 102-2112-M-007-005-MY2]
A high-performance supercapacitor based on Ni(OH)(2) nanoflakes modified ZnO nanowires (NWs) was developed. The well-aligned ZnO NWs were synthesized by chemical bath deposition, followed by pulse electrodeposition of Ni(OH)(2) nanoflakes on the surface of ZnO NWs at 1 mA cm(-2) current density. The effects of the pulse electrodeposition conditions were systematically investigated. Both the pulse time and relaxation time were found to affect the size and interspacing of the nanoflakes, while the deposition cycle number determines the thickness of the Ni(OH)(2) nanoflake shell. The ZnO/Ni(OH)(2) nanocomposite electrode fabricated under the optimal pulse electrodeposition conditions has exhibited a large specific capacitance of 1830 F g(-1), a high energy density of 51.5 Wh kg(-1), and a high power density of 9 kW kg(-1), revealing its potential application in electrochemical capacitors. (C) 2016 Elsevier B.V. All rights reserved.
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