A first-principles study on divergent reactions of using a Sr₃Fe₂O₇ cathode in both oxygen ion conducting and proton conducting solid oxide fuel cells.

ABSTRACT: Exploring mechanisms for sluggish cathode reactions is of great importance for solid oxide fuel cells (SOFCs), which will benefit the development of suitable cathode materials and then accelerate cathode reaction rates. Moreover, possible reaction mechanisms for one cathode should be different when operating in oxygen ion conducting SOFCs (O-SOFC) and in proton conducting SOFCs (P-SOFCs), and therefore, they lead to different reaction rates. In this work, a Ruddlesden-Popper (R-P) oxide, Sr₃Fe₂O₇ (SFO), was selected as a promising cathode for both O-SOFCs and P-SOFCs. Using the first-principles approach, a microscopic understanding of the O₂ reactions over this cathode surface was investigated operating in both cells. Compared with La_0.5

SUBMITTER: Tan W 

PROVIDER: S-EPMC9083137 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature