LI Dong, FU Mengyu, JIN Yingmin, XIONG Yueping

(School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150000, Heilongjiang, China)

Abstract: Solid oxide fuel cell (SOFC) has attracted extensive attentions due to its high energy conversion efficiency, fuel diversity, environmental friendliness and all-solid structure. However, the commercialization of SOFC is hindered owing to the problems, especially the degradation of cathode performance during long-term operation. Factors causing the degradation of cathode performance and corresponding degradation mechanisms are discussed in detail from the aspects of micromorphology variation, solid phase reaction at cathode-electrolyte interface, element surface segregation, S and Cr poisoning. To this end, strategies to address the corresponding issues are briefly introduced.
Key words: solid oxide fuel cell cathode; long-term stability; element surface segregation; poisoning