A Novel Self?Assembled Cobalt?Free Perovskite Composite Cathode with Triple?Conduction for Intermediate Proton?Conducting Solid Oxide Fuel Cells

A traditional composite cathode for proton-conducting solid oxide fuel cells (H-SOFCs) is typically obtained by mixing materials and proton conducting electrolyte of BaCe0.7Y0.2Zr0.1O3–? (BZCY), providing chemical thermal compatibility with the electrolyte. Here, a series triple-conducing cobalt-free iron-based perovskites as cathodes H-SOFCs reported. Specifically, BaCexFe1–xO3–? (x = 0.36, 0.43, 0.50) shows various contents two single phase an in situ heterojunction structure well triple conductivity tailoring Ce/Fe ratios. The cell performance optimized BaCe0.36Fe0.64O3–? (BCF36) composition reaches 1056 mW cm?2 at 700 °C. Moreover, record 1525 °C modifying BCF36 microstructure through spraying method, demonstrating high promise Co-free H-SOFCs.