Ionomer degradation in catalyst layers of anion exchange membrane fuel cells.

ABSTRACT: Anion exchange membrane fuel cells (AEMFCs) that operate at high pH, offer the advantage of enabling the use of abundant 3d-transition metal-based electrocatalysts. While they have shown remarkable improvement in performance, their long-term durability remains insufficient for practical applications with the alkaline polymer electrolytes (APEs) being the limiting factor. The stability of APEs is generally evaluated in concentrated alkaline solutions, which overlooks/oversimplifies the complex electrochemical environment of the catalyst layer in membrane electrode assembly (MEA) devices. Herein, we report a study of the degradation of the membrane and ionomer independently under realistic H₂-air (CO₂ free) fuel cell operation, using proton nuclear magnetic resonance (<

SUBMITTER: Li Q 

PROVIDER: S-EPMC10548514 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature