Journal of Materials Science

, Volume 48, Issue 24, pp 8463–8470 | Cite as

Facile one-step hydrothermal synthesis of reduced graphene oxide/Co3O4 composites for supercapacitors

  • Gui-Jing Liu
  • Le-Qing FanEmail author
  • Fu-Da Yu
  • Ji-Huai Wu
  • Lu Liu
  • Zhao-Yuan Qiu
  • Qin Liu


This paper reports a facile one-step hydrothermal treatment of graphene oxide (GO) and cobalt acetate (Co(Ac)2) for preparing reduced GO (rGO)/Co3O4 composites which were used as electrode materials for supercapacitors containing electrolytes of 2 M KOH aqueous solution. The morphologies and structures of rGO/Co3O4 composites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectrum, and N2 adsorption–desorption isotherms. The electrochemical performances of two-electrode supercapacitors were evaluated by cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy techniques. During the hydrothermal reaction, GO was reduced and 10–30 nm-sized Co3O4 nanoparticles were in situ grown onto the rGO sheets simultaneously. The effects of mass ratios of GO and Co(Ac)2 on the performances of supercapacitors were investigated. In comparison with pure Co3O4-based supercapacitor, supercapacitors based on rGO/Co3O4 composites show better performances because both the specific surface areas and the electrical conductivities of electrode materials were increased by the introduction of rGO. When the mass ratio of GO and Co(Ac)2 is 1:2, rGO/Co3O4 composite electrode exhibits the highest capacitance of 263.0 F/g at a constant current density of 0.2 A/g in a two-electrode supercapacitor. In addition, the supercapacitor shows high rate capability and long cyclic durability.


Graphene Oxide Co3O4 Graphite Oxide Composite Electrode Constant Current Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported financially by the National Natural Science Foundation of China (No. U1205112), the Doctoral Supervisor Project of Chinese Ministry of Education (No. 20123501110001), and the Key Project of Chinese Ministry of Education (No. 211204).


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Gui-Jing Liu
    • 1
  • Le-Qing Fan
    • 1
    Email author
  • Fu-Da Yu
    • 1
  • Ji-Huai Wu
    • 1
  • Lu Liu
    • 1
  • Zhao-Yuan Qiu
    • 1
  • Qin Liu
    • 1
  1. 1.Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Institute of Materials Physical ChemistryHuaqiao UniversityQuanzhouPeople’s Republic of China

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