Conductive Microporous Covalent Triazine‐Based Framework for High‐Performance Electrochemical Capacitive Energy Storage

• Published in: Angewandte Chemie International Edition Vol. 57; no. 27; pp. 7992 - 7996
• Main Authors: Li, Yajuan, Zheng, Shuanghao, Liu, Xue, Li, Pan, Sun, Lei, Yang, Ruixia, Wang, Sen, Wu, Zhong‐Shuai, Bao, Xinhe, Deng, Wei‐Qiao
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 02.07.2018
• Edition: International ed. in English
• Subjects: Capacitance; Conductivity; covalent organic frameworks; Electrochemistry; Electrode materials; Electrodes; Energy storage; Flux density; microporous materials; Nitrogen; Nitrogen enrichment; Polymers; Storage systems; Supercapacitors; Tetracyanoquinodimethane; Triazine; covalent organic frameworks; energy storage; microporous materials; supercapacitors; electrode materials
• ISSN: 1433-7851; 1521-3773; 1521-3773
• DOI: 10.1002/anie.201711169

Nitrogen‐enriched porous nanocarbon, graphene, and conductive polymers attract increasing attention for application in supercapacitors. However, electrode materials with a large specific surface area (SSA) and a high nitrogen doping concentration, which is needed for excellent supercapacitors, has not been achieved thus far. Herein, we developed a class of tetracyanoquinodimethane‐derived conductive microporous covalent triazine‐based frameworks (TCNQ‐CTFs) with both high nitrogen content (>8 %) and large SSA (>3600 m2 g−1). These CTFs exhibited excellent specific capacitances with the highest value exceeding 380 F g−1, considerable energy density of 42.8 Wh kg−1, and remarkable cycling stability without any capacitance degradation after 10 000 cycles. This class of CTFs should hold a great potential as high‐performance electrode material for electrochemical energy‐storage systems. Superstores: A new class of conductive microporous covalent triazine‐based frameworks (TCNQ‐CTFs) has been developed as the electrode material for supercapacitors. With both large surface area and abundant nitrogen, TCNQ‐CTF‐800 had a higher specific capacitance and comparative energy density than state‐of‐the‐art nitrogen‐containing frameworks and carbon materials, which holds great potential for applications in energy storage.