Preparation and application of porous nitrogen-doped graphene obtained by co-pyrolysis of lignosulfonate and graphene oxide

• DOI: 10.1016/j.biortech.2014.11.035
• Publication Date: 2014-11-17T08:54:42Z
• Authors: Hai-Bo Zhao; Wen-Dong Wang; Qiu-Feng Lü; Ting-Ting Lin; Qilang Lin; Haijun Yang
• Keywords: Hot Temperature; Nitrogen; Nanotechnology; Urea; Graphite; Oxides; 02 engineering and technology; Electric Capacitance; 0210 nano-technology; Lignin; Porosity

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 7.41at.% endows the nitrogen-doped graphene electrode material with super capacitance up to 170Fg(-1), high rate performance, and excellent cycling stability.