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Radical Covalent Organic Frameworks: A General Strategy to Immobilize Open‐Accessible Polyradicals for High‐Performance Capacitive Energy Storage
Author(s) -
Xu Fei,
Xu Hong,
Chen Xiong,
Wu Dingcai,
Wu Yang,
Liu Hao,
Gu Cheng,
Fu Ruowen,
Jiang Donglin
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201501706
Subject(s) - energy storage , redox , capacitance , covalent bond , capacitive sensing , radical , nanotechnology , supercapacitor , materials science , chemical engineering , chemistry , computer science , electrode , organic chemistry , engineering , physics , power (physics) , quantum mechanics , operating system
Ordered π‐columns and open nanochannels found in covalent organic frameworks (COFs) could render them able to store electric energy. However, the synthetic difficulty in achieving redox‐active skeletons has thus far restricted their potential for energy storage. A general strategy is presented for converting a conventional COF into an outstanding platform for energy storage through post‐synthetic functionalization with organic radicals. The radical frameworks with openly accessible polyradicals immobilized on the pore walls undergo rapid and reversible redox reactions, leading to capacitive energy storage with high capacitance, high‐rate kinetics, and robust cycle stability. The results suggest that channel‐wall functional engineering with redox‐active species will be a facile and versatile strategy to explore COFs for energy storage.