A Chemistry and Microstructure Perspective on Ion‐Conducting Membranes for Redox Flow Batteries

The membrane in redox flow batteries (RFBs) plays a critical role in their practical application. Promising RFB membranes require the deliberate design of their materials chemistry and microstructure. This Review highlights the design rationales of recently reported RFB membranes at the molecular level with in-depth discussion of the structure–property relationships, and subsequently discusses future prospect in the field.