<p>Redox flow batteries (RFBs) have represented an important research focus for long-term energy storage due to their long lifespan, decoupled power and energy, environmental friendliness, and flexible installation options. An essential part of RFBs is the ion exchange membrane, which enables ion conduction while suppressing electrolyte penetration. Polymers of intrinsic microporosity (PIMs), characterized by their subnanometer pores, are promising materials for making ion exchange membranes because of their ability to attain high ion conductivity and high selectivity. This review summarizes the use of PIM membranes in RFBs, including all-vanadium redox flow batteries (VRFBs), zinc-based redox flow batteries (ZRFBs), and aqueous organic redox flow batteries (AORFBs), over the past five years. We analyze the construction strategy of ion conduction channels and explore how polymer structure influences membrane properties and cell performance, intending to furnish insights for the engineering of high-performance RFB membranes.</p> Graphical Abstract <p></p>

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Ion exchange membranes derived from polymers of intrinsic microporosity for redox flow batteries

  • Siyu Chen,
  • Kang Peng,
  • Xinchi Ma,
  • Shuo Yang,
  • Chenxiao Jiang,
  • Zhengjin Yang,
  • Tongwen Xu

摘要

Redox flow batteries (RFBs) have represented an important research focus for long-term energy storage due to their long lifespan, decoupled power and energy, environmental friendliness, and flexible installation options. An essential part of RFBs is the ion exchange membrane, which enables ion conduction while suppressing electrolyte penetration. Polymers of intrinsic microporosity (PIMs), characterized by their subnanometer pores, are promising materials for making ion exchange membranes because of their ability to attain high ion conductivity and high selectivity. This review summarizes the use of PIM membranes in RFBs, including all-vanadium redox flow batteries (VRFBs), zinc-based redox flow batteries (ZRFBs), and aqueous organic redox flow batteries (AORFBs), over the past five years. We analyze the construction strategy of ion conduction channels and explore how polymer structure influences membrane properties and cell performance, intending to furnish insights for the engineering of high-performance RFB membranes.

Graphical Abstract