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An Unusual Low-Surface-Area Nitrogen Doped Carbon for Ultrahigh Gravimetric and Volumetric Capacitances

Abstract

The popular pursuit of high interior surface area, although leading to increasing capacitance records for carbon-based supercapacitor electrode materials, also produces low volumetric capacitances. We herein reported a porous nitrogen doped carbon material with relatively low specific surface area of 403 m2 g-1 and total pore volume of only 0.29 cm3 g-1, exhibits very high gravimetric capacitance of 400 F g-1 and volumetric capacitance of 507 F cm-3 in three-electrode system. Simultaneously, the energy density reaches 26.1 Wh kg−1 at a power density of 200 W kg−1, and maintains as 7.44 Wh kg−1 at 5000 W kg−1, in a symmetric two-electrode test conducted in 6 M KOH solution. The result implies a maximized utilization of the interior surface and the significant capacitance contribution resulted from each unit surface, for which a systemic investigation on the critical structure features has been given.

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Publication details

The article was received on 08 Mar 2018, accepted on 09 Apr 2018 and first published on 13 Apr 2018


Article type: Communication
DOI: 10.1039/C8TA02198H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    An Unusual Low-Surface-Area Nitrogen Doped Carbon for Ultrahigh Gravimetric and Volumetric Capacitances

    Z. X. Mao, C. Wang, Q. Shan, M. J. Wang, Y. Zhang, W. Ding, S. Chen, L. Li, J. Li and Z. Wei, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02198H

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