Journal
JOURNAL OF POWER SOURCES
Volume 285, Issue -, Pages 63-69Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.03.079
Keywords
Molybdenum disulfide; Carbon cloth; Flexible; Supercapacitor
Funding
- National High Technology Research and Development Program (863 program) of China [2015AA030701]
- NSFC [11204388, 51402112]
- Fundamental Research Funds for the Central Universities [CQDXWL-2014-001, CQDXWL-2013-012]
- large-scale equipment sharing fund of Chongqing University
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Molybdenum sulfide (MoS2) hierarchical nanospheres are synthesized using a hydrothermal method and characterized by X-ray powder diffraction, Brunauer-Emmett-Teller, scanning electron microscopy and transmission electron microscopy. The prepared MoS2 is used to fabricate solid state flexible supercapacitors which show excellent electrochemical performance such as high capacitance 368 F g(-1) at a scan rate of 5 mV s(-1) and high power density of 128 W kg(-1) at energy density of 5.42 Wh kg(-1). The fabricated supercapacitor presents good characteristics such as lightweight, low cast, portability, high flexibility, and long term cycling stability by retaining 96.5% after 5000 cycles at constant discharge current of 0.8 mA. Electrochemical impedance spectroscopy (EIS) results reveal low resistance and suggest that MoS2 nanospheres would be a promising candidate for supercapacitors. Three charged supercapacitors connected in series can light 8 red color commercial light emitting diodes (LEDs) for 2 min, demonstrating its capability as a good storage device. (C) 2015 Elsevier B.V. All rights reserved.
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