title: 3D Graphene Functionalized by Covalent Organic Framework Thin Film as Capacitive Electrode in Alkaline Media.
abstract: To harness the electroactivity of anthraquinone as an electrode material, a great recent effort have been invested to composite anthraquinone with carbon materials to improve the conductivity. Here we report on a noncovalent way to modify three-dimensional graphene with anthraquinone moieties through on-surface synthesis of two-dimensional covalent organic frameworks. We incorporate 2,6-diamino-anthraquinone moieties into COF through Schiff-base reaction with benzene-1,3,5-tricarbaldehyde. The synthesized COF -graphene composite exhibits large specific capacitance of 31.7 mF/cm(2). Long-term galvanostatic charge/discharge cycling experiments revealed a decrease of capacitance, which was attributed to the loss of COF materials and electrostatic repulsion accumulated during charge-discharge circles which result in the poor electrical conductivity between 2D COF layers.
authors.affiliation: †Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, and ‡State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, P. R. China.
authors.forename: Zeqi
authors.initials: Z
authors.lastname: Zha
authors.affiliation: †Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, and ‡State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, P. R. China.
authors.forename: Lirong
authors.initials: L
authors.lastname: Xu
authors.affiliation: †Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, and ‡State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, P. R. China.
authors.forename: Zhikui
authors.initials: Z
authors.lastname: Wang
authors.affiliation: †Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, and ‡State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, P. R. China.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Li
authors.affiliation: †Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, and ‡State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, P. R. China.
authors.forename: Qinmin
authors.initials: Q
authors.lastname: Pan
authors.affiliation: †Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, and ‡State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, P. R. China.
authors.forename: Pingan
authors.initials: P
authors.lastname: Hu
authors.affiliation: †Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, and ‡State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, P. R. China.
authors.forename: Shengbin
authors.initials: S
authors.lastname: Lei
keywords: alkaline electrolyte; anthraquinone; capacitor; covalent organic framework; graphene; noncovalent functionalization