title: Nitrogen and Phosphorous Co-Doped Graphene Monolith for Supercapacitors.
abstract: The co-doping of heteroatoms has been regarded as a promising approach to improve the energy-storage performance of graphene-based materials because of the synergetic effect of the heteroatom dopants. In this work, a single precursor melamine phosphate was used for the first time to synthesise nitrogen/phosphorus co-doped graphene (N/P-G) monoliths by a facile hydrothermal method. The nitrogen contents of 4.27-6.58 at% and phosphorus levels of 1.03-3.00 at% could be controlled by tuning the mass ratio of melamine phosphate to graphene oxide in the precursors. The N/P-G monoliths exhibited excellent electrochemical performances as electrodes for supercapacitors with a high specific capacitance of 183 F g(-1) at a current density of 0.05 A g(-1), good rate performance and excellent cycling performance. Additionally, the N/P-G electrode was stable at 1.6 V in 1 m H2 SO4 aqueous electrolyte and delivered a high energy density of 11.33 Wh kg(-1) at 1.6 V.
authors.affiliation: Nanomaterials Centre, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Corner College and Cooper Road, St Lucia, 4072 Qld, Australia.
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Wen
authors.affiliation: School of Chemical Engineering, The University of Queensland, Corner College and Cooper Road, St Lucia, 4072 Qld, Australia.
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Rufford
authors.affiliation: Nanomaterials Centre, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Corner College and Cooper Road, St Lucia, 4072 Qld, Australia.|School of Chemical Engineering, The University of Queensland, Corner College and Cooper Road, St Lucia, 4072 Qld, Australia.
authors.forename: Denisa
authors.initials: D
authors.lastname: Hulicova-Jurcakova
authors.affiliation: Nanomaterials Centre, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Corner College and Cooper Road, St Lucia, 4072 Qld, Australia. l.wang@uq.edu.au.|School of Chemical Engineering, The University of Queensland, Corner College and Cooper Road, St Lucia, 4072 Qld, Australia. l.wang@uq.edu.au.
authors.forename: Lianzhou
authors.initials: L
authors.lastname: Wang
mesh_terms: D006108:Graphite / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D009584:Nitrogen / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D056951:Photoelectron Spectroscopy
chemical_list: D010758:Phosphorus; D006108:Graphite; D009584:Nitrogen
keywords: carbon; doping; electrochemistry; graphene; phosphorus