title: Metal-Organic Coordination Polymer to Prepare Density Controllable and High Nitrogen-Doped Content Carbon/Graphene for High Performance Supercapacitors.
abstract: Design and preparation of carbon-based electrode material with high nitrogen-doping ratio and appropriate density attract much interest for supercapacitors in practical application. Herein, three porous carbon/graphene (NCGCu, NCGFe, and NCGZn) with high doping ratio of nitrogen have been prepared via directly pyrolysis of graphene oxide (GO)/metal-organic coordination polymer (MOCP) composites, which were formed by reacting 4,4'-bipyridine (BPD) with CuCl2, FeCl3, and ZnCl2, respectively. As-prepared NCGCu, NCGFeand NCGZnshowed high nitrogen doping ratio of 10.68, 12.99, and 11.21 at. %; and high density of 1.52, 0.84, and 1.15 g cm-3, respectively. When as-prepared samples were used as supercapacitor electrodes, NCGCu, NCGFeand NCGZnexhibited high gravimetric specific capacitances of 369, 298.5, 309.5 F g-1, corresponding to high volumetric specific capacitances of 560.9, 250.7, 355.9 F cm-3at a current density of 0.5 A g-1, as well as good cycling stability, nearly 100% of the capacitance retained after 1000 cycles even at a large current density of 10 A g-1. It is expected that the provided novel strategy can be used to develop electrode materials in high performance energy conversion/storage devices.
authors.affiliation: College of Materials Science and Engineering, Hunan University , Changsha, 410082, P. R. China.
authors.forename: Jinwei
authors.initials: J
authors.lastname: Luo
authors.affiliation: College of Materials Science and Engineering, Hunan University , Changsha, 410082, P. R. China.
authors.forename: Wenbin
authors.identifier: http://orcid.org/0000-0002-1635-2444
authors.initials: W
authors.lastname: Zhong
authors.affiliation: College of Materials Science and Engineering, Hunan University , Changsha, 410082, P. R. China.
authors.forename: Yubo
authors.initials: Y
authors.lastname: Zou
authors.affiliation: College of Materials Science and Engineering, Hunan University , Changsha, 410082, P. R. China.
authors.forename: Changlun
authors.initials: C
authors.lastname: Xiong
authors.affiliation: Department of Polymer Science, Beijing University of Chemical Technology , Beijing, 100029, P. R. China.
authors.forename: Wantai
authors.initials: W
authors.lastname: Yang
keywords: density controllable; high nitrogen-doping ratio carbon/graphene; metal−organic coordination polymer; supercapacitor; volumetric specific capacitance