Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 7, Pages 8120-8127Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.02.016
Keywords
CoNi2S4; Graphene; 3D structure; Carbon nanotube; Supercapacitor
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Funding
- U.S. Army Research Office through the MURI Grant [W911NF-11-1-0362]
- National Natural Science Foundation of China [51202034]
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In this paper, we described a simple two-step method for preparing needle-like CoNi2S4/CNT/graphene nanocomposite with robust connection among its ternary components. The prepared CoNi2S4/CNT/graphene nanocomposite has been thoroughly characterized by spectroscopic (Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy), X-ray diffraction and thermogravimetric analysis. Microscopy techniques (scanning electron microscopy-energy dispersive spectroscopy and transmission electron microscopy) were employed to probe the morphological structures. The electrochemical properties of the as-prepared 3D architectures were investigated with three and two-electrode systems. In addition to its high specific capacitance (710 F g(-1) at 20 A g(-1)), after charging-discharging for 2000 cycles, the electrode still maintained the capacity retention of about 82%. When used as the active electrode material for supercapacitors, the fabricated CoNi2S4-g-CNT nanostructure exhibited excellent specific capacitance and good rate capability, making it a promising candidate for next-generation supercapacitors. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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