期刊
DALTON TRANSACTIONS
卷 49, 期 41, 页码 14432-14444出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt00263a
关键词
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资金
- Basic Research Laboratory through the National Research Foundations of Korea - Ministry of Science, ICT and Future Planning [NRF-2015R1A4A1041584]
- BK 21 PLUS
- Creative Human Resource Development Program for IT Convergence, Pusan National University
The integration of metal oxide composite nanostructures has attracted great attention in supercapacitor (SC) applications. Herein, we fabricated a series of metal oxide composite nanostructures, including ZnO nanowires, NiO nanosheets, ZnO/CuO nanowire arrays, ZnO/FeO nanocrystals, ZnO/NiO nanosheets and ZnO/PbO nanotubes, via a simple and cost-effective chemical bath deposition (CBD) method. The electrochemical properties of the produced SCs were examined by performing cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) analysis, and electrochemical impedance spectroscopy (EIS). Of the different metal oxides and metal oxide composites tested, the unique surface morphology of the ZnO/NiO nanosheets most effectively increased the electron transfer rate and electrical conductivity, which resulted in improved energy storage properties. The binder-free ZnO/NiO electrode delivered a high specific capacitance/capacity of 1248 F g(-1) (599 mA h g(-1)) at 8 mA cm(-2) and long-term cycling stability over the course of 3000 cycles with a capacity retention of 79%. These results suggested a superiority in performance of the ZnO/NiO nanosheets relative to the nanowires, nanowire arrays, nanocrystals, and nanotubes. Thus, the present work has provided an opportunity to fabricate new metal oxide composite nanostructures with high-performance energy storage devices.
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