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Structure–Property–Performance Relationship of Graphene Oxide Modified Composite Membranes for Anion Exchange Membrane Electrolyzers
(John Wiley and Sons Inc, 2026) Devrim, Yılser; Altinisik, Hasan; Abay, Ogün; Özalp, Ercan; Kim, Hern; Önel, Nisa Gökçen
In this study, graphene oxide (GO)-modified poly (phenylene oxide, PPO) anion exchange membranes (F/GO) were developed forapplication in anion exchange membrane electrolyzers (AEMELs). The incorporation of GO enhanced membrane hydration, ion-exchange capacity, and hydroxide-ion conductivity, resulting in an ~15% increase in current density at 2.0 V and 80°C (0.551 A/cm2) compared with the pristine membrane (0.480 A/cm−2). The F/GO membranes also showed enhanced hydrogen productionrates and an HHV-based energy efficiency of 76% at 0.5 A/cm2 and 80°C. These results underscore the potential for F/GO mem-branes in scalable AEMEL applications. Mechanical and alkaline stability tests confirmed robustness under harsh conditions.These findings demonstrate that the incorporation of GO provides a simple, scalable, and potentially lower-cost modificationstrategy compared with highly engineered polymer architectures, while also improving overall electrolyzer performance, high-lighting the potential of GO-modified membranes for practical hydrogen production in AEMEL systems.