LAUSR

Polymer electrolyte membranes (PEMs) play vital roles in electrochemical energy conversion and storage devices, such as polymer electrolyte membrane fuel cell (PEMFC), redox flow battery (RFB), and water electrolysis (WE). As the crucial component of these devices, PEMs need to possess high ion conductivity and electronic insulation, remarkable mechanical and chemical stability, and outstanding isolation function for the materials on both sides of the cathode and anode. Polyvinylpyrrolidone has received widespread attention in the research of PEMs owing to its tertiary amine basic groups and exceptional hydrophilic properties. Combined with the research reports of our group and domestic as well as foreign groups, this report reviews the application status of polyvinylpyrrolidone-based PEMs in PEMFC, vanadium redox flow battery (VRFB), and alkaline water electrolysis (AWE), and describes in detail their contributions to the key scientific problems in these fields, providing constructive suggestions and guidance for the application of polyvinylpyrrolidone-based PEMs in electrochemical energy conversion and storage devices.