Journal
CARBON
Volume 84, Issue -, Pages 335-346Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.12.013
Keywords
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Funding
- State Key 973 Program of PRC [2013CB934104, 2012CB224805]
- NSF of China [51372041, 51422202]
- Deanship of Scientific Research at King Saud University [RGP-VPP-227]
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Nitrogen-doped ordered mesoporous carbons (N-doped OMCs) with a high surface area of 1741 m(2)/g and nitrogen content up to 15 wt.% have been synthesized by nanocasting approach by using SBA-15 as a hard template, phenolic resin (resol) as a carbon source and high nitrogen-containing cyanamide as the nitrogen dopant. The introduction of cyanamide not only incorporates high-content nitrogen into the carbon matrix in the primary forms of pyridinic and quaternary species, but also greatly increases the surface area of materials. The obtained N-doped OMCs have large surface area with mesoporosity up to 92%, uniform and appropriate pore size (3.6-4.1 nm), large pore volume (1.2-1.81 cm(3)/g). These merits together with high nitrogen enrichment lead to a specific capacitance (230 F/g at 0.5 A/g) and good rate capability (175 F/g at 20 Pig with capacitance retention of 77.4%) in 6 M KOH aqueous electrolytes. (C) 2014 Elsevier Ltd. All rights reserved.
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