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A Novel Self‐Assembled Cobalt‐Free Perovskite Composite Cathode with Triple‐Conduction for Intermediate Proton‐Conducting Solid Oxide Fuel Cells
Author(s) -
Tong Hua,
Fu Min,
Yang Yang,
Chen Fanglin,
Tao Zetian
Publication year - 2022
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202209695
Subject(s) - materials science , cathode , oxide , electrolyte , cobalt , perovskite (structure) , solid oxide fuel cell , microstructure , composite number , conductivity , chemical engineering , electrode , composite material , chemistry , metallurgy , engineering
A traditional composite cathode for proton‐conducting solid oxide fuel cells (H‐SOFCs) is typically obtained by mixing cathode materials and proton conducting electrolyte of BaCe 0.7 Y 0.2 Zr 0.1 O 3–δ (BZCY), providing chemical and thermal compatibility with the electrolyte. Here, a series of triple‐conducing and cobalt‐free iron‐based perovskites as cathodes for H‐SOFCs is reported. Specifically, BaCe x Fe 1– x O 3–δ ( x = 0.36, 0.43, and 0.50) shows various contents of two single phase perovskites with an in situ heterojunction structure as well as triple conductivity by tailoring the Ce/Fe ratios. The cell performance with the optimized BaCe 0.36 Fe 0.64 O 3–δ (BCF36) cathode composition reaches 1056 mW cm −2 at 700 °C. Moreover, a record cell performance of 1525 mW cm −2 at 700 °C is obtained by modifying the BCF36 cathode microstructure through a spraying method, demonstrating high promise with Co‐free cathodes for H‐SOFCs.