Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 47, Pages 24033-24040Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta05934h
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Funding
- National Natural Science Foundation of China [11274107, 61204109, 11504111, 61574060]
- Program for New Century Excellent Talents in University [NCET-13-0185]
- Foundation for the authors of National Excellent Doctorial Dissertation of China [201318]
- Projects of Science and Technology Commission of Shanghai Municipality [15JC1401800]
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In this paper, using CoS@NiCo2S4 as an example, we report the successful design and synthesis of a novel hierarchical core/shell metal sulfide with conductive CoS on nickel foam via a facile ion exchange process. The prepared sulfide core/shell nanoarrays exhibit superior redox reactivity for supercapacitors. High areal capacitances of 7.62 F cm(-2) (almost a 2.5-fold enhancement compared with the CoO nanowire@NiCo2O4 sheet arrays) at a scan rate of 5 mA cm(-2) and even 5.52 F cm(-2) at 30 mA cm(-2) were achieved. The superior electrochemical performance demonstrates that the CoS nanowire@NiCo2S4 sheet arrays are promising for high-performance supercapacitor applications.
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