Design and synthesis of three-dimensional needle-like CoNi2S4/CNT/graphene nanocomposite with improved electrochemical properties |
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| Affiliation: | 1. Institute of Special Materials and Technology, Fudan University, Shanghai 200433, China;2. Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX 77005, USA;1. School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China;2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China;1. laboratoire nanomatériaux, naotéchnologie et energie (L2NE), Faculté des sciences de Tunis, Université de Tunis El Manar, 2092 Tunis, Tunisia;2. Laboratoire de Physique des Matériaux, Faculté des Sciences de Bizerte, Université de Carthage, 7021, Zarzouna, Tunisia;3. Laboratoire des Sciences de la Matière Condensée (LSMC), Université Oran, 1 Ahmed Ben Bella, 31100 Oran, Algeria;4. Laboratoire de Physique de la Matière Condensée, Faculté des Sciences de Tunis, Tunis-El Manar University, 2092 Tunisia;1. State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China;2. College of Biological, Chemical Science and Chemical Engineering, Jiaxing University, Jiaxing, 314001, China;3. Department of Energy and Process Engineering, Faculty of Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway;1. College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China;2. Department of Materials, Loughborough University, Leicester LE11 3TU, UK |
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| Abstract: | 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. |
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| Keywords: | Graphene 3D structure Carbon nanotube Supercapacitor |
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