Publication date: 10th April 2024
Oxygen electrode/electrolyte interface is critical to the performance and stability of solid oxide fuel cells. Typically, the formation of a tight oxygen electrode/electrolyte interface is achieved by minimizing the surface energy between solid phases during high temperature sintering. For conventional LSM and LSCF electrodes, a large number of studies have shown that the formation of LSM/YSZ and LSCF/GDC interfaces is accompanied by cationic interdiffusion, which may subsequently lead to phase segregation, interfacial reactions, and performance degradation under operating conditions. However, researchers have paid little attention to the oxygen electrode/electrolyte interface of protonic ceramic fuel cells (PCFCs), and the formation and evolution mechanism of the interface under practical working conditions are still unclear. Herein, LSM, LSF, PBSCF, and BCFZY oxygen electrodes were prepared on BaZr0.1Ce0.7Y0.1Yb0.1O3-δ electrolyte by high-temperature sintering and treated under actual working conditions. The effects of electrode composition, treatment conditions on ionic interdiffusion and elemental segregation were systematically investigated by exploring the morphology, phase composition, elemental distribution and valence states on the electrolyte surface, and the effects on the oxygen electrode/electrolyte interface were further investigated.
High Temperature Oxide Protonic Membrane Electrochemical/Chemical Hybrid Catalytic Reaction for Green Ammonia Synthesis (41210502); High Temperature Solid Oxide Electrolyzer for Hydrogen/Ammonia Platform Construction (41220102).
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