Highly selective metal-organic framework-based (MOF-5) separator for non-aqueous redox flow battery
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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8
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Chemical Engineering Journal, Volume 433
Abstract
Non-aqueous redox flow batteries (NARFBs) are promising in the grid-scale energy storage for the harvesting of the intermittent renewable power sources. However, the lack of efficient separator is still impeding their further development. A flexible nanoporous separator is prepared through a “rolling dough” strategy, with zinc metal-organic framework (MOF-5) and polytetrafluoroethylene as the substrate. The prepared separator shows a remarkable ionic selectivity of Li+ over N-(ferrocenylmethyl)-N,N-dimethyl-N-ethylammonium ions (Fc1N112+) at a high ratio 26.6. A Li-based hybrid NARFB constructed with the separator exhibits substantially high Coulombic efficiency 99.7% and average discharge capacity 2.26 Ah L−1 with capacity retention 99.96% per cycle over 200 cycles at 4 mA cm−2. The excellent performance is attributed to the MOF nanoparticles and the designed composite structure, which achieves both high ionic selectivity and chemical stability simultaneously. This work provides a facile and efficient strategy to fabricate high-performance separator for NARFBs.Description
Funding Information: This work was supported by the National Natural Science Foundation of China (Grant No. 21636007 ) and the Start-up Package of T10108 Professorship offered by Aalto University to Y. Li. J. Yuan, Q. Qiu, and L. Fan acknowledge the financial support from the China Scholarship Council (Grant No. 201906250030, 201906150314, and 201806250102). Z.-Z. Pan acknowledges the financial support of the Academy of Finland (Grant No. 324414). Publisher Copyright: © 2021 The Authors
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Yuan, J, Zhang, C, Qiu, Q, Pan, Z, Fan, L, Zhao, Y & Li, Y 2022, 'Highly selective metal-organic framework-based (MOF-5) separator for non-aqueous redox flow battery', Chemical Engineering Journal, vol. 433, 133564. https://doi.org/10.1016/j.cej.2021.133564