Assessing durability of anion exchange membrane water electrolyzers

Anion exchange membrane water electrolyzers (AEMWEs) are considered one of the most promising low cost clean hydrogen production routes for unlocking sustainable energy storage and generation. They have the advantage of using cheaper non-noble metal base catalysts and less expensive flow fields and bipolar plates.

At the heart of the electrolyzer, however, lies the anion exchange membrane (AEM) and durability of that is essential for the widespread commercial adoption of this technology. A recent review titled “Durability of anion exchange membrane water electrolyzers” was published in the Journal of Energy & Environmental Science provided an in-depth analysis of the progress of the research and development in this arena. The article presents both durability-limiting factors and mitigation strategies for AEMWEs under three operation modes, i.e., pure

water-fed (no liquid electrolyte), concentrated KOH-fed, and 1 wt% K2CO3-fed operating at a differential pressure of 100 psi. In addition, it also presents extended-term behaviors of AEMWEs at the single-cell level and connects their behavior with the electrochemical, chemical, and mechanical instability of single-cell components.

Among the single cell components, the AEM is one the most crucial. Among commercially available options the article especially touts the long-term stability of Dioxide Materials’ Sustainion AEMs and high performance generated by the AEMWEs consequently enabled by them.

These studies provide direction for long-lasting AEMWEs with highly efficient hydrogen production capabilities. To purchase similar materials to advance your research visit our webstore.