Enhancing Efficiency and Durability of Anion-Exchange Membrane Water Electrolyzers for Hydrogen Production
Key Ideas
  • Identified critical role of water back-diffusion in affecting species transport and electrode kinetics in AEMWEs.
  • Unraveled electrode structural effects on efficiency losses, especially under industrially relevant conditions.
  • Demonstrated durable operation of AEMWEs by selecting key additives to fine-tune ink properties for scalable electrode manufacturing.
  • Achieved drastic improvement in AEMWE efficiency and durability through a rational electrode design strategy.
Anion-exchange membrane water electrolyzers (AEMWEs) hold promise for efficient and cost-effective hydrogen production. This study delves into the challenges hindering large-scale deployment of AEMWEs, focusing on efficiency and durability concerns. By investigating water back-diffusion and electrode structural effects on efficiency losses, the researchers highlight the importance of optimizing electrode design for improved performance. The study showcases the significance of water gradient and membrane hydration in enhancing mass transport, as well as the impact of electrode architecture on oxygen transport and overpotential behaviors. Through precise tuning of catalyst ink rheology and stability using additives, the research team achieves scalable fabrication of electrodes with enhanced transport features, enabling AEMWEs to operate efficiently for extended periods with minimal degradation. The findings offer valuable insights into degradation mechanisms and present a promising strategy for advancing AEMWE technology towards sustainable hydrogen production.
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