Layered SmBaCuCoO5+δ and SmBaCuFeO5+δ perovskite oxides as cathode materials for proton-conducting SOFCs

Qiong Nian, Ling Zhao, Beibei He, Bin Lin, Ranran Peng, Guangyao Meng, Xingqin Liu

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

A dense BaCe0.8Sm0.2O5+δ (BCS) electrolyte was fabricated on a porous anode by in situ drop-coating to develop a simple and cost-effective route to fabricate proton-conducting solid oxide fuel cells (SOFCs). Layered perovskite-structure oxides SmBaCuCoO5+δ (SBCC) and SmBaCuFeO5+δ (SBCF) were prepared and the electrical conductivity, the thermal expansion coefficient and electrochemical performance were investigated as potential cathode materials for proton-conducting SOFCs. Thermal expansion coefficients of SBCC and SBCF were suitable for BCS electrolyte and the electrical conductivity of the SBCC is higher than that of the SBCF. The maximum power density of 449 mW cm2 and 333 mW cm2 at 700 °C were obtained for the SBCC/BCS/NiO-BCS and SBCF/BCS/NiO-BCS cells, respectively. The interfacial polarization resistances for SBCC and SBCF cathode are as low as 0.137 Ω cm-2 and 0.196 Ω cm-2 at 700 °C, respectively. The results indicate that the SBCC and SBCF are promising cathode materials for proton-conducting SOFCs.

Original languageEnglish (US)
Pages (from-to)291-294
Number of pages4
JournalJournal of Alloys and Compounds
Volume492
Issue number1-2
DOIs
StatePublished - Mar 4 2010

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Keywords

  • Drop-coating
  • Layered perovskite-structure cathodes
  • Proton-conducting SOFCs

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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