Graphene/polyaniline nanofiber composites as supercapacitor electrodes

Zhang, Kai, Zhang, Li Li, Zhao, X. S. and Wu, Jishan (2010) Graphene/polyaniline nanofiber composites as supercapacitor electrodes. Chemistry of Materials, 22 4: 1392-1401. doi:10.1021/cm902876u

Author Zhang, Kai
Zhang, Li Li
Zhao, X. S.
Wu, Jishan
Title Graphene/polyaniline nanofiber composites as supercapacitor electrodes
Journal name Chemistry of Materials   Check publisher's open access policy
ISSN 0897-4756
Publication date 2010-02-23
Sub-type Article (original research)
DOI 10.1021/cm902876u
Volume 22
Issue 4
Start page 1392
End page 1401
Total pages 10
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
Chemically modified graphene and polyaniline (PANI) nanofiber composites were prepared by in situ polymerization of aniline monomer in the presence of graphene oxide under acid conditions. The obtained graphene oxide/PANI composites with different mass ratios were reduced to graphene using hydrazine followed by reoxidation and reprotonation of the reduced PANI to give the graphene/PANI nanocomposites. The morphology, composition, and electronic structure of the composites together with pure polyaniline fibers (PANI-F), graphene oxide (GO), and graphene (GR) were characterized using X-ray diffraction (XRD), solid-state 13C NMR, FT-IR, scanning electron microscope (SEM), transmission electron microscope (TEM), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). It was found that the chemically modified graphene and the PANI nanofibers formed a uniform nanocomposite with the PANI fibers absorbed on the graphene surface and/or filled between the graphene sheets. Such uniform structure together with the observed high conductivities afforded high specific capacitance and good cycling stability during the charge−discharge process when used as supercapacitor electrodes. A specific capacitance of as high as 480 F/g at a current density of 0.1 A/g was achieved over a PANI-doped graphene composite. The research data revealed that high specific capacitance and good cycling stability can be achieved either by doping chemically modified graphenes with PANI or by doping the bulky PANIs with graphene/graphene oxide.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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