Highly selective metal-organic framework-based (MOF-5) separator for non-aqueous redox flow battery

Jiashu Yuan, Cuijuan Zhang*, Qianyuan Qiu, Zhengze Pan, Lijun Fan, Yicheng Zhao, Yongdan Li*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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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.

Original languageEnglish
Article number133564
Number of pages8
JournalChemical Engineering Journal
Publication statusPublished - 1 Apr 2022
MoE publication typeA1 Journal article-refereed


  • Energy storage
  • Membrane
  • Metal-organic frameworks
  • Redox flow battery
  • Separator


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