Journal
BIORESOURCE TECHNOLOGY
Volume 176, Issue -, Pages 106-111Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.11.035
Keywords
Lignosulfonate; Pyrolysis; Nitrogen-doped; Porous graphene; Supercapacitor
Funding
- National Natural Science Foundation of China [51272045]
- Foundation for Development of Science and Technology of Fuzhou University [2014-XQ-2]
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Nitrogen-doped graphene with in-plane porous structure was fabricated by simple co-pyrolysis of lignosulfonate and graphene oxide in the presence of urea. Lignosulfonate first performs as a dispersant adsorbed on the surface of graphene oxide to prevent the aggregation of graphene oxide sheets for preparing homogeneous nitrogen-containing precursor, and then acts as a porogen to render graphene sheets with nanopores in the pyrolysis process of the nitrogen-containing precursor. Urea was used as a nitrogen source to incorporate nitrogen atoms into graphene basal plane. The special nanoporous structure combined with nitrogen content of 7.41 at.% endows the nitrogen-doped graphene electrode material with super capacitance up to 170 F g(-1), high rate performance, and excellent cycling stability. (C) 2014 Elsevier Ltd. All rights reserved.
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