Journal of Electronic Materials

, Volume 48, Issue 5, pp 2754–2760 | Cite as

Amorphous Cobalt Carbon Nanofibers Decorated with Conductive Ag as Free-Standing Flexible Electrode Material for High-Performance Supercapacitors

  • Xingwei Sun
  • Chunping LiEmail author
  • Jie Bai


Carbon nanofiber-based amorphous cobalt oxide (CoxOy/CNFs) embedded with Ag have been prepared by a simple electrospinning technique followed by heat treatment. Because the composite material prepared by this method showed good flexibility, addition of a conductive agent and binder is not required for use as an electrode material in supercapacitors. The Co-Ag/CNFs composite materials exhibited remarkably improved electrical conductivity and specific capacitance with good cycling stability in comparison with electrodes based on CoxOy/CNFs, owing to the presence of Ag; For instance, the Co-Ag/CNFs(2) composite electrode exhibited specific capacitance of 698 F g−1 at 1 A g−1 and good cycling stability with ∼ 81.1% capacitance retention over 3000 cycles. The composite materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD) analysis, Raman spectra, and thermogravimetric analysis (TGA), confirming successful combination of the amorphous cobalt oxide and silver metal element with the carbon nanofibers.


Cobalt oxide Ag carbon nanofibers supercapacitors 


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The authors gratefully acknowledge support from the National Natural Science Foundation of China (No. 21766022).

Supplementary material

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Supplementary material 1 (PDF 642 kb)


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Chemical Engineering CollegeInner Mongolia University of TechnologyHohhotPeople’s Republic of China

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