Solvothermal synthesis and supercapacitive properties of highly electrochemical stable covalent organic frameworks with triazine building block

Abstract

Supercapacitors have been widely studied as a typical representative of new energy storage systems. As a type of novel crystalline porous material, covalent triazine frameworks (CTFs) have attracted enormous attention owing to their high nitrogen content and unique triazine ring structure, which give them high chemical and thermal stability. In this paper, 2,4,6‐tris(4‐aldophenyl)‐1,3,5‐triazine (TFPT) and 2,4,6‐tris(4‐aminophenyl)‐1,3,5‐triazine (TAPT) were used to synthesize TPT‐CTFs by Schiff base reaction. TPT‐CTFs exhibit regular nanosheets structure and high crystallinity. The specific capacitance of TPT‐CTFs is 110 F/g at current density of 0.1 A/g. After 10,000 cycles of charge and discharge, the capacitance retention rate is high as 105%, due to the high crystallinity support and expandable channels of TPT‐CTFs. In addition, the simple and convenient one‐pot hydrothermal synthesis used in this paper, avoids harsh conditions of common ampoule methods for synthesis of CTFs materials.

Preparation of Ni Nanowires Covalent Organic Framework Composites with High Electrochemical Stability and Supercapacitor Performance

“…The XRD analysis provides the structure and crystallinity of the TPT-COF/NiNWs. As shown in Figure (c), the diffraction peaks of TPT-COF/NiNWs appear at 43.9, 50.9, and 75.1°, which corresponded to the lattice planes of (111), (200), and (220), , respectively. In addition, there are several peaks at 6.7, 10.5, and 25.3° attributed to the (220), (330), and (001) crystal planes of TPT-COF, respectively.…”

Research Progress on the Application of Covalent Organic Framework Nanozymes in Analytical Chemistry

“…Among them, the concentration of the catalyst, reaction time, temperature, and pressure all affect the structure and activity of COF nanozymes. Based on the solvothermal synthesis method, researchers have conducted a lot of work on the performance of COF nanozymes [68,69]. Solvothermal synthesis is widely used and is conducive to the large-scale preparation of COF nanozymes [65].…”