Investigation of SmBaCuCoO5+δ double-perovskite as cathode for proton-conducting solid oxide fuel cells

Zhiwen Zhu, Zetian Tao, Lei Bi, Wei Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

SmBaCuCoO5+δ, a double-perovskite oxide, was synthesized by the modified Pechini method and developed as cathode material for proton-conducting solid oxide fuel cells. The SmBaCuCoO5+δ powders calcined at 800 °C, show the double-perovskite structure in powder XRD pattern. SmBaCuCoO5+δ has a more suitable thermal expansion coefficient than SmBaCo2O5+δ for BaCe 0.7Zr0.1Y0.2O3-δ electrolyte-based solid oxide fuel cells. The single cell was tested with humidified hydrogen (∼3% H2O) as the fuel and static air as the oxidant. The performance of the cell was characterized by DC Electronic Load and AC impedance spectroscopy. The peak power densities reached 355-86 mW cm -2 in the range of 700-550 °C and the interfacial polarization resistance decreased with increasing operation temperature, from 3.1 Ω cm2 at 550 °C to 0.22 Ω cm2 at 700 °C. The high power density and low polarization demonstrate that SmBaCuCoO 5+δ is a potential candidate for proton-conducting solid oxide fuel cells.

Original languageEnglish (US)
Pages (from-to)1771-1774
Number of pages4
JournalMaterials Research Bulletin
Volume45
Issue number11
DOIs
StatePublished - Nov 2010
Externally publishedYes

Keywords

  • A. Ceramics
  • C.Impedance spectroscopy
  • C.X-ray diffraction
  • D.Electrochemical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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