期刊
DALTON TRANSACTIONS
卷 45, 期 35, 页码 13779-13786出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6dt01927g
关键词
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资金
- National Natural Science Foundation of China [11564011, 51362010, 51405267]
- Natural Science Foundation of Hainan Province [514212, 20152018, 214019]
- Shandong Provincial Natural Science Foundation [ZR2014EEQ017]
- special project for development of major national scientific instrument and equipment of China [2012YQ09022910]
- Scientific Research Projects of Colleges and Universities of Hainan Province [HNKY2014-14]
In this work, we report an atomic layer deposition (ALD) method for the fabrication of NiO/CNT hybrid structures in order to improve electronic conductivity, enhance cycling stability and increase rate capability of NiO used as supercapacitor electrodes. A uniform NiO coating can be well deposited on carbon nanotubes (CNTs) through simultaneously employing O-3 and H2O as oxidizing agents in a single ALD cycle of NiO for the first time, with a high growth rate of nearly 0.3 angstrom per cycle. The electrochemical properties of the as-prepared NiO/CNT were then investigated. The results show that the electrochemical capacitive properties are strongly associated with the thickness of the NiO coating. The NiO/CNT composite materials with 200 cycles of NiO deposition exhibit the best electrochemical properties, involving high specific capacitance (622 F g(-1) at 2 A g(-1), 2013 F g(-1) for NiO), excellent rate capability (74% retained at 50 A g(-1)) and outstanding cycling stability. The impressive results presented here suggest a great potential for the fabrication of composite electrode materials by atomic layer deposition applied in high energy density storage systems.
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