Membranes in non-aqueous redox flow battery: A review

Jiashu Yuan, Zheng Ze Pan, Yun Jin, Qianyuan Qiu, Cuijuan Zhang, Yicheng Zhao, Yongdan Li

Research output: Contribution to journalReview articlepeer-review

68 Citations (Scopus)


Redox flow battery (RFB) is promising in grid-scale energy storage, and potentially applicable for facilitating the harvest of the intermittent renewable power sources, like wind and solar, and stabilizing the power grid. Early RFBs are based on aqueous electrolytes and the all-vanadium as well as Zn/Br systems have been demonstrated in close commercial scale. Non-aqueous RFBs (NARFBs) are the second-generation flow batteries based on organic solvent which have potentially much wider electrochemical window, and thus possible much higher energy density, and temperature window than those of the aqueous systems. As a crucial component of NARFBs, the membrane serves to prevent the crossover of the positive and negative active species whilst facilitating the transfer of the supporting electrolyte ions. However, the membranes utilized in the state-of-the-art publications still need great improvements in performance. In this article, the fundamentals, classifications, and performances of the membranes in NARFB are introduced. The recent progresses and challenges on the innovation of NARFB membranes are summarized. A perspective on the near future developments of NARFB membranes are presented. The composite membranes are likely the promising direction to forward the development of the NARFB technologies.

Original languageEnglish
Article number229983
JournalJournal of Power Sources
Publication statusPublished - 2021 Jul 15


  • Composite membranes
  • Dense membranes
  • Energy storage
  • Non-aqueous redox flow battery
  • Porous membranes


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