Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (12): 2256-2262.doi: 10.3866/PKU.WHXB201409302

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

SnO2/Graphite Nanosheet Composite Electrodes and Their Application in Supercapacitors

CHEN Chan-Juan, HU Zhong-Ai, HU Ying-Ying, LI Li, YANG Yu-Ying, AN Ning, LI Zhi-Min, WU Hong-Ying   

  1. Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
  • Received:2014-06-09 Revised:2014-09-29 Published:2014-11-27
  • Contact: HU Zhong-Ai
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20963009, 21163017) and Specialized Research Fund for the Doctoral Program of Higher Education, China (20126203110001).


Electrochemical exfoliation of graphite rods under the action of an electric field force led to the formation of two-dimensional (2D) graphite nanosheet arrays (GNSAs) perpendicular to the surface of the graphite substrate and parallel to each other in arrangement. Subsequently, SnO2/graphite nanosheet array (SnO2/GNSA) composite electrodes were prepared by the cathodic reduction electrodeposition method. The morphology, composition, and microstructure of the samples were characterized using field emission scanning electron microscopy (FESEM), powder X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy, respectively. Electrochemical measurements showed that the composite electrodes achieved specific capacitance values as high as 4105 F·m-2 in the potential window up to 1.4 V with a scan rate of 5 mV·s-1 in 0.5 mol·L-1 LiNO3 solution. Asymmetric supercapacitor fabricated with the as-prepared SnO2/GNSAs exhibited excellent capacitive performance with energy density of 0.41 Wh·m-2 in the potential window up to 1.8 V and retention of 81% after 5000 cycles.

Key words: Supercapacitor, Graphite nanosheet array, SnO2, Composite electrode, Electrochemical performance


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