Issue 62, 2016

Nitrogen and sulfur self-doped porous carbon from brussel sprouts as electrode materials for high stable supercapacitors

Abstract

Heteroatom self-doped porous carbon materials were synthesized for the first time via freeze drying technique, followed by carbonization of brussel sprouts under a nitrogen atmosphere. The resultant materials were analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) mapping, transmission electron microscopy (TEM), and Brunauer–Emmett–Teller (BET) measurements. Brussel sprouts carbonized at 800 °C exhibit superior capacitive performance, including specific capacitance of 255 F g−1 at a current density of 0.5 A g−1, high rate capability (83% capacitance retention from 0.5 A g−1 to 50 A g−1), and good cycle life (99.5% maintained over 5000 cycles). The highly stable electrochemical performance could be due to the hierarchical porous structure combined with the high specific surface area and heteroatom doping efforts.

Graphical abstract: Nitrogen and sulfur self-doped porous carbon from brussel sprouts as electrode materials for high stable supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
01 Apr 2016
Accepted
18 May 2016
First published
19 May 2016

RSC Adv., 2016,6, 57464-57472

Nitrogen and sulfur self-doped porous carbon from brussel sprouts as electrode materials for high stable supercapacitors

J. Li, G. Zan and Q. Wu, RSC Adv., 2016, 6, 57464 DOI: 10.1039/C6RA08428A

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