文献类型：期刊文献

英文题名：Crystallizing Self-Standing Covalent Organic Framework Membranes for Ultrafast Proton Transport in Flow Batteries

作者：Wu, Yulin[1];Wang, Yixing[2];Zhang, Dezhu[2];Xu, Fang[3];Dai, Liheng[1];Qu, Kai[1];Cao, Hongyan[3];Xia, Yu[3];Li, Siyao[1];Huang, Kang[2,3];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Suzhou Lab, Suzhou 215000, Peoples R China;[3]Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Peoples R China

年份：2023

卷号：62

期号：50

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20234515040527);WOS:【SCI-EXPANDED(收录号:WOS:001097532300001)】；

基金：The authors gratefully acknowledge the research funding provided by National Key R&D Program of China (2021YFB3801301), National Natural Science Foundation of China (22075076, 22208092), and China Postdoctoral Science Foundation (2022 M711142).

语种：英文

外文关键词：Covalent Organic Frameworks; Crystallization; Flow Battery; Proton Transport; Self-Standing Membranes

摘要：Covalent organic frameworks (COFs) display great potential to be assembled into proton conductive membranes for their uniform and controllable pore structure, yet constructing self-standing COF membrane with high crystallinity to fully exploit their ordered crystalline channels for efficient ionic conduction remains a great challenge. Here, a macromolecular-mediated crystallization strategy is designed to manipulate the crystallization of self-standing COF membrane, where the -SO3H groups in introduced sulfonated macromolecule chains function as the sites to interact with the precursors of COF and thus offer long-range ordered template for membrane crystallization. The optimized self-standing COF membrane composed of highly-ordered nanopores exhibits high proton conductivity (75 mS cm-1 at 100 % relative humidity and 20 degrees C) and excellent flow battery performance, outperforming Nafion 212 and reported membranes. Meanwhile, the long-term run of membrane is achieved with the help of the anchoring effect of flexible macromolecule chains. Our work provides inspiration to design self-standing COF membranes with ordered channels for permselective application. A self-standing COF membrane was prepared for ultrafast proton conduction in flow battery. The -SO3H groups in macromolecule chains offer sites to interact with the precursors of COF and function as long-range ordering growing template to enhance the crystallinity of self-standing COF membrane. Well-defined channels of COF membranes promised high proton conductivity and excellent battery performance.+image