Abstract
The nitrogen (N)-doped reduced graphene aerogel (NRGA) with high Ndoping level is successfully fabricated via chemical converted method and thermal activation. N-atoms can be incorporated at a high temperature of 900 °C and distort the lattice structure of RGA by the formation of different N-configuration bindings. NRGA exhibits a larger surface area than GA, and the surface morphology is roughened as characterized by microscopic analysis. As confirmed by X-ray photoelectron spectroscopy (XPS) result, the pyridinic- and/or pyrrolic-N bindings modified electronic structures to improve the electrochemical properties. The specific capacitance of NRGA is increased to 289 F g-1 at 10 mV s-1 with rate capability of 75% and cyclic stability of 86%. These excellent electrochemical performances of NRGA are due to the synergistic structure effect which provide a large accessible area and rapid ion transfer pathways, as well as N-containing groups acting as the electrochemical active sites positioned at the edge or on-plane of NRGA lattices.
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Acknowledgments: This work was supported by Korea Electric Power Corporation (KEPCO, No.R17XH01).
The image from this article is used as the cover image of the Volume 25, Issue 10.
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Yu, X., Kota, M. & Park, H.S. Hierarchical structured, nitrogen-incorporated graphene aerogel for high performance supercapacitor. Macromol. Res. 25, 1043–1048 (2017). https://doi.org/10.1007/s13233-017-5158-x
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DOI: https://doi.org/10.1007/s13233-017-5158-x