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https://hdl.handle.net/10356/105234
Title: | Hierarchical α-MnO 2 nanowires@Ni1-xMnxOy nanoflakes core-shell nanostructures for supercapacitors | Authors: | Lou, David Xiong Wen Wang, Hsin-Yi Xiao, Fang-Xing Yu, Le Liu, Bin |
Keywords: | DRNTU::Engineering::Materials::Nanostructured materials | Issue Date: | 2014 | Source: | Wang, H.-Y., Xiao, F.-X., Yu, L., Liu, B., & Lou, D. X. W. (2014). Hierarchical α-MnO 2 Nanowires@Ni1-xMnxOy Nanoflakes Core-Shell Nanostructures for Supercapacitors. Small, 10(15), 3181-3186. | Series/Report no.: | Small | Abstract: | A facile two-step solution-phase method has been developed for the preparation of hierarchical α-MnO2 nanowires@Ni1-xMnxOy nanoflakes core–shell nanostructures. Ultralong α-MnO2 nanowires were synthesized by a hydrothermal method in the first step. Subsequently, Ni1-xMnxOy nanoflakes were grown on α-MnO2 nanowires to form core–shell nanostructures using chemical bath deposition followed by thermal annealing. Both solution-phase methods can be easily scaled up for mass production. We have evaluated their application in supercapacitors. The ultralong one-dimensional (1D) α-MnO2 nanowires in hierarchical core–shell nanostructures offer a stable and efficient backbone for charge transport; while the two-dimensional (2D) Ni1-xMnxOy nanoflakes on α-MnO2 nanowires provide high accessible surface to ions in the electrolyte. These beneficial features enable the electrode with high capacitance and reliable stability. The capacitance of the core–shell α-MnO2@Ni1-xMnxOy nanostructures (x = 0.75) is as high as 657 F g−1 at a current density of 250 mA g−1, and stable charging-discharging cycling over 1000 times at a current density of 2000 mA g−1 has been realized. | URI: | https://hdl.handle.net/10356/105234 http://hdl.handle.net/10220/20514 |
ISSN: | 1613-6810 | DOI: | 10.1002/smll.201303836 | Schools: | School of Chemical and Biomedical Engineering | Rights: | © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | SCBE Journal Articles |
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