Journal
ELECTROCHIMICA ACTA
Volume 211, Issue -, Pages 627-635Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.06.082
Keywords
NiCo2S4; Sulfidation; Nanocomposites; Energy storage; Supercapacitor
Categories
Funding
- National Natural Science Foundation of China [21576034]
- International S&T Cooperation Projects of Chongqing [CSTC2013gjhz90001]
- Jilin Provincial Science and Technology Development Foundation [20140101109JC]
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A facile two-step hydrothermal method is modified to synthesize NiCo2S4 nanosheets on activated multiporous carbon (AMC) for application in supercapacitors. The structure and performance of both NiCo2S4 and the intermediate product, i.e. NiCo2S4 on AMC are investigated in detail to clarify the effect of the sulfidation treatment. Owing to the high electronic conductivity of NiCo2S4, the unique designed nanostructure exhibits a high specific capacitance (651.1 F g(-1) at 0.6 A g(-1)), good rate performance (88.1% retention for current increases around 17 times) and excellent cycling stability (87.4% retention after 2000 cycles). These results suggest this hybrid composite to be a promising electrode material for high-performance supercapacitors and the rational fabrication provides an approach to improve the electrochemical energy storage for other transition metal sulfides and oxides. (C) 2016 Elsevier Ltd. All rights reserved.
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