Selective In Situ Phase Segregation Enabling Efficient and Stable Protonic Ceramic Fuel Cell Cathode Performance.

ABSTRACT: Efficient and reliable protonic ceramic fuel cells (PCFCs) necessitate the development of active and durable cathode materials to accelerate the sluggish oxygen reduction reaction (ORR). The most promising PCFC cathode candidates are perovskite-type structured oxides with mixed oxygen ion, proton, and hole conductivity. However, mixed conductivity often requires materials with alkaline earth elements and the inclusion of these elements in the cathode structure leads to severe degradation in the presence of even small trace amounts of CO₂ in air. Herein, a new approach is presented to address this challenge by inducing selective in situ phase segregation to engineer the cathode surface and bulk separately. This selective phase segregation is achieved via targeted control of the s

SUBMITTER: Feng D 

PROVIDER: S-EPMC12332803 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature