Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 143, Issue 3, Pages 1344-1351Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2013.11.045
Keywords
Nanostructures; Chemical synthesis; Electrochemical techniques; Electrochemical properties
Categories
Funding
- National Natural Science Foundation of China [51302101, 21303129, 11004071]
- Key Foundation of Educational Commission of Anhui Province [KJ2012A250, KJ2010A306]
- Huaibei Science and Technology Development Funds [20110305]
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This study reports an easy chemical conversion route toward large-scale fabrication of carbon nanotube (CNT)-porous nickel oxide (NiO) hybrid nanocomposites as supercapacitor electrode materials. The electrocapacitive performance of CNT-porous NiO hybrids is evaluated by cyclic voltammetry and galvanostatic charge-discharge measurements. The synthesized CNT-NiO hybrid nanocomposite electrode presents a high specific capacitance of 759 F g(-1) at 0.5 A g(-1) in 6 M KOH aqueous electrolyte, which is almost twice that of pure NiO nanoparticle (388 F g(-1)) electrodes and nine times of that of commercial NiO particle (88.4 F g(-1)) electrodes. Furthermore, good capacitance retention is achieved after 1000 cycles of galvanostatic charge-discharge. The synergistic effects from the pseudocapacitance of porous NiO particles, good electrical conductivity, and open tip CNTs attribute to the high capacitance performance. (C) 2013 Elsevier B.V. All rights reserved.
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