Journal
MATERIALS LETTERS
Volume 124, Issue -, Pages 133-136Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.03.067
Keywords
Porous materials; Thin films; Nickel sulfide; Ion exchange reaction; Supercapacitors
Funding
- Foundation of State Key Laboratory of Coal Conversion [J14-15-909]
- Doctor Funds [20122035]
- UIT of Taiyuan University of Science and Technology [xj2013061]
- Shanxi Province Science Foundation for Youths [2013021011-6]
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Metal sulfides have emerged as a new class of promising active material for supercapacitors. Porous NiS nanoflake arrays are successfully synthesized by a facile solution-based ion exchange reaction (IER) method based on preformed chemical bath deposition (CBD) derived NiO nanoflake arrays. NiS nanoflake arrays preserve the morphology of precursor-NiO nanoflake arrays and grow vertically to the substrates. As cathode of supercapacitors, NiS nanoflake arrays exhibit outstanding electrochemical performances with a high specific capacitance of 718 F g(-1) at 2 A g(-1) and good cycle performance and capacity retention (593 F g(-1) after 3000 cycles at 2 A g(-1)). (C) 2014 Elsevier B.V. All rights reserved.
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