Article history: Heteroatoms doping provides a promising strategy for improving the energy density of supercapacitors Received 21 August 2015 based on the carbon electrodes. In this paper, we present a N and S dual doped ordered mesoporous Received in revised form 5 November 2015 carbon with ultrahigh doping level using dimethylglyoxime as pristine precursor. The N doping content Accepted 9 November 2015 of the reported materials varies from 6.6 to 15.6 at.% dependent on the carbonization temperature, and Available online 12 November 2015 the S doping content varies from 0.46 to 1.01 at.%. Due to the ultrahigh heteroatoms doping content, the reported materials exhibit pronounced pseudo-capacitance. Meanwhile, the reported materials exhibit Keywords: 2 −1 2 −1 high surface areas (640–869 m g ), large pore volume (0.71–1.08 cm g ) and ordered pore struc- Composite capacitive behaviors ture. The outstanding textual properties endow the reported materials excellent electrical double-layer Heteroatoms doped carbon capacitance (EDLC). By effectively combining the pseudo-capacitance with EDLC, the reported materi- Utrahigh doping level −1 als exhibit a surprising energy storage/relax capacity with the highest speciﬁc capacitance of 565 F g , which value is 3.3 times higher than that of pristine CMK-3, and can compete
Applied Surface Science – Elsevier
Published: Jan 1, 2016
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