Triazine-based covalent organic framework/carbon nanotube fiber nanocomposites for high-performance supercapacitor electrodes. (24th April 2023)

• Record Type: Journal Article
• Authors: Yang, Huan-Cheng; Chen, Yi-Yun; Suen, Shing-Yi; Lee, Rong-Ho
• Is Part Of: Polymer. Volume 273(2023)
• Publication Date: 2023-04-24
• Subjects: Covalent organic framework -- Carbon nanotube -- Supercapacitor; COF Covalent organic framework -- CNT Carbon nanotube -- SC Supercapacitor; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2023.125853
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: In this study we synthesized the triazine-based two-dimensional covalent organic frameworks (COFs) TPTP-COF and TPDA-COF through Schiff base (imine) condensations of 2, 4, 6-tris(4-formylphenyl)-1, 3, 5-triazine (TPT-3CHO) with 2, 4, 6-tris(4-aminophenyl)triazine (TPT-3NH2 ) and diaminoanthraquinone (DAAQ), respectively. Moreover, we used carbon nanotube fibers ( f -CNFs) as a template to synthesize TPTP-COF @f -CNF and TPDA-COF @f -CNF nanocomposite materials. X-ray diffraction image analysis revealed that our two COF materials possessed hexagonal crystal structures, with the crystallinity of TPTP-COF being much higher than that of TPDA-COF. Through simulations using Material Studio software, we determined an AA stacking structure for TPTP-COF and an AB stacking structure for TPDA-COF. These COF materials had high specific surface areas, charge transfer capability, and high redox properties, making them suitable for use in supercapacitor applications. TPTP-COF– and TPDA-COF–based electrodes provided specific capacitances of 577.4 and 640.4 F g −1, respectively, at a scan rate of 5 mV s −1 . The specific capacitance of the TPTP-COF@ f -CNF and TPDA-COF@ f -CNF electrodes decreased upon increasing the f -CNF content. The maximum specific capacitances of TPTP-COF– and TPDA-COF–based symmetric supercapacitor devices were 56.4 and 70.6 F g −1, respectively. The TPTP-COF– and TPDA-COF–based devices both exhibited good electrochemical stability, preserving 78.60 and 81.54%, respectively, of their initial capacitances after 10, 000 cycles. The energy density and power density of the TPDA-COF–based device were slightly better than those of the TPTP-COF–based device. Graphical abstract: Image 1 Highlights: Triazine-based two-dimensional covalent organic frameworks (TPTP-COF and TPDA-COF). TPTP-COF and TPDA-COF materials displaying excellent redox properties and capacitances. TPTP-COF@ f -CNF and TPDA-COF@ f -CNF composites for high-performance supercapacitors.