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| Chemical Precipitation-reflux Synthesis and Discharge Performance of Composite of Nickel Hydroxide /Reduced Graphene Oxide |
Huiying YU1,Wenxiu HE1( ),Yongqiang ZHANG1,Shengli AN1,Junhong LIU2 |
1 School of Chemistry and Chemistry Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China
2 Baotou Professional Technology College, Baotou 014010, China |
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Cite this article:
Huiying YU,Wenxiu HE,Yongqiang ZHANG,Shengli AN,Junhong LIU. Chemical Precipitation-reflux Synthesis and Discharge Performance of Composite of Nickel Hydroxide /Reduced Graphene Oxide. Chinese Journal of Materials Research, 2017, 31(3): 226-232.
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Abstract Composite of nickel hydroxide/reduced graphene oxide (Ni(OH)2/RGO) was synthesized by facile chemical precipitation-reflux method with graphite oxide and nickel sulfate hexahydrate as precursors and ammonium hydroxide as the precipitator. The surface morphology and microscopic structures of the composite were characterized by X-ray diffraction (XRD) and scan electron microscopy (SEM). The electrochemical performance of the composite was assessed by cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS). The influence of different mass ratio of graphite oxide to nickel hydroxide (GO: Ni(OH)2) and the concentration of ammonium hydroxide on structures, morphologies, and electrochemical properties of the composite was investigated. The results show that the synthesized composite of β-Ni(OH)2/RGO has mutually inserted structure. The composite of β-Ni(OH)2/RGO exhibits high electrochemical performance of 334.9 mAh/g at 0.2C rate and 260.2 mAh/g at 5C rate when the concentration of ammonium hydroxide is 3 mol/L and the mass ratio of GO:Ni(OH)2 is 1:8, while the product can still maintain 90% of the theoretical specific capacity of β-Ni(OH)2. It displays that this electrode material has excellent electrochemical performance with excellent rate capability.
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Received: 12 June 2016
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| Fund: Supported by the Natural Science Foundation of Inner Mongolia (Nos.2014MS0523 & 2015MS0208), Institutions of Higher Learning Youth Science & Technology Talents Planning-Youth Science & Technology Talents of Inner Mongolia Autonomous Region A Class Project (No.NJYT-14-A08) and Science & Technology Plan Project of Baotou (No.2015C2004-1) |
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