Ultra-thin polymer membranes enable fast, selective ion transport for energy storage

https://phys.org/news/2025-06-ultra-thin-polymer-membranes-enable.html

"irregular/ disordered pore structures leads to trade-off between selectivity/ permeability... overcome using interfacial 3-μm-thick polymeric membrane cross-linking separation layer on top of polymeric supporting layer... enables 82.38% vanadium flow battery energy efficiency, 300 mA/cm2 current density... tune separation layer  thickness/ morphology by varying cross-linking time/ types of agents... precise angstrom-scale ion sieving, high ion selectivity/ low resistance... membrane-based separation, energy storage"

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