Journal
CARBON
Volume 85, Issue -, Pages 51-59Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.12.064
Keywords
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Funding
- NSF foundation [91334203, 21274011, 21121064]
- National 863 Program [2013AA031901]
- National 973 Program [2011CB706900]
- National Scientific Research Funding [ZZ1304]
- BUCT [RC1301]
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A series of nitrogen-doped porous carbons are prepared from nitrogen-containing zeolitic imidazolate framework (ZIF) and additional carbon sources (including melamin, urea, xylitol and sucrose) via co-carbonization at T = 950 degrees C. Results indicate that macromolecular carbon sources, say, sucrose, can effectively protect the nitrogen loss from ZIF backbone owing to the pre-melting and polymerization of the sucrose adsorbed on the ZIP surface in the carbonization process, which makes the corresponding ZIP-derived porous Carbon-ZS have high nitrogen content and excellent capacitive performance. The specific capacitance of Carbon-ZS in 6 M KOH solution reaches 285.8 F g(-1) at a current density of 0.1 A g(-1) owing to its relatively high nitrogen content and proper hierarchical pore structure. In particular, the capacitance of Carbon-ZS is higher than previously reported IRMOF-derived carbon, ZIF-67-derived carbon and ZIF-8/furfuryl alcohol co-derived carbon. Besides high capacitance, moreover, Carbon-ZS also shows excellent cycling stability and good electric conductivity as electrode materials for electric double-layer capacitors. (C) 2014 Elsevier Ltd. All rights reserved.
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