Issue 19, 2018

An unusual low-surface-area nitrogen doped carbon for ultrahigh gravimetric and volumetric capacitances

Abstract

The popular pursuit of a 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 a relatively low specific surface area of 403 m2 g−1 and a total pore volume of only 0.29 cm3 g−1, exhibiting a very high gravimetric capacitance of 400 F g−1 and a volumetric capacitance of 507 F cm−3 in a three-electrode system. Simultaneously, the energy density reaches 26.1 W h kg−1 at a power density of 200 W kg−1, and maintains 7.44 W h 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 systematic investigation on the critical structural features has been given.

Graphical abstract: An unusual low-surface-area nitrogen doped carbon for ultrahigh gravimetric and volumetric capacitances

Supplementary files

Article information

Article type
Communication
Submitted
08 Mar 2018
Accepted
09 Apr 2018
First published
13 Apr 2018

J. Mater. Chem. A, 2018,6, 8868-8873

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, 6, 8868 DOI: 10.1039/C8TA02198H

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