title: High-performance supercapacitor based on nitrogen-doped porous carbon derived from zinc(II)-bis(8-hydroxyquinoline) coordination polymer.
abstract: Nitrogen-doped porous carbon electrodes with remarkable specific capacitance have been fabricated by the rational carbonization of zinc(II)-bis(8-hydroxyquinoline) (abbr. Znq(2)) coordination polymer, and heating treatment with CO(NH(2))(2). The experimental results demonstrate that the mass ratio of carbon precursor and CO(NH(2))(2) plays a key role in the formation of porous carbon with various nitrogen content as well as specific surface areas and pore structures. The cyclic voltammetry and galvanostatic charge-discharge measurements show that the capacitive performance has been remarkably improved by doping with nitrogen. The specific capacitance of 219.2 F g(-1) is achieved at the current density of 1 A g(-1) with nitrogen-doped porous carbon, increasing up to ca. 56.8% compared to that with pristine porous carbon. The nitrogen-doped porous carbon electrode exhibits enhance capacitance retention as ca. 45.2% at 20 A g(-1) as well as cycling stability (ca. 7.6% loss after 3000 cycles). The present carbonization method as well as the nitrogen-doping method for porous carbon from coordination polymer can enrich the strategies for the production of carbon-based electrodes materials in the application of electrochemical capacitors.
authors.affiliation: School of Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, PR China. cxyhfut@gmail.com
authors.forename: Xiang Ying
authors.initials: XY
authors.lastname: Chen
authors.forename: Dong Hua
authors.initials: DH
authors.lastname: Xie
authors.forename: Chong
authors.initials: C
authors.lastname: Chen
authors.forename: Jian Wei
authors.initials: JW
authors.lastname: Liu
mesh_terms: D002244:Carbon / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D006912:Hydroxyquinolines / Q000737:chemistry*; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties
chemical_list: D006912:Hydroxyquinolines; D009942:Organometallic Compounds; D011108:Polymers; C521287:zinc(II)-bis(8-hydroxyquinoline); D002244:Carbon; D009584:Nitrogen