New insight about the working principles of bipolar membranes could guide future fuel cell design

Ion (de)solvation during BPM water dissociation and water formation. Credit: Nature Energy (2024). DOI: 10.1038/s41560-024-01484-z

Bipolar membranes are a class of ion-conductive polymers comprised of two oppositely charged layers, known as the cation-exchange and anion-exchange layer. These membranes are central to the functioning of various technologies, including electrolyzers and hydrogen fuel cells.

While many companies and start-ups are using bipolar membranes to develop new energy technologies, their underlying working principles and ion solvation kinetics have not yet been fully elucidated. Better understanding these principles could inform the future fabrication of these materials and facilitate their successful integration …
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