title: Radical covalent organic frameworks: a general strategy to immobilize open-accessible polyradicals for high-performance capacitive energy storage.
abstract: 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.
authors.affiliation: Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan).|Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 (P. R. China).
authors.forename: Fei
authors.initials: F
authors.lastname: Xu
authors.affiliation: Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan).
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.affiliation: Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan).
authors.forename: Xiong
authors.initials: X
authors.lastname: Chen
authors.affiliation: Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 (P. R. China).
authors.forename: Dingcai
authors.initials: D
authors.lastname: Wu
authors.affiliation: Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan).
authors.forename: Yang
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 (P. R. China).
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan).
authors.forename: Cheng
authors.initials: C
authors.lastname: Gu
authors.affiliation: Materials Science Institute, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275 (P. R. China).
authors.forename: Ruowen
authors.initials: R
authors.lastname: Fu
authors.affiliation: Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787 (Japan). jiang@ims.ac.jp.
authors.forename: Donglin
authors.initials: D
authors.lastname: Jiang
keywords: capacitors; covalent organic frameworks; energy storage; radicals; synthesis