A study of Pr0.7Sr0.3Fe1-xNi xO3-δ as a cathode material for SOFCs with intermediate operating temperature

Shin Ichi Hashimoto, Kent Kammer, Peter Halvor Larsen, Finn Willy Poulsen, Mogens Mogensen

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Pr0.7Sr0.3Fe1-xNixO 3-δ(PSFN; x=0.2-0.5) compounds were synthesized and characterized by powder X-ray diffraction (XRD), thermal expansion coefficient (TEC) measurements, electrical conductivity and electrochemical impedance spectroscopy on cone-shaped electrodes on a Ce0.9Gd 0.1O1.95 (CGO10) electrolyte. The main phase of the powders belongs to the orthorhombic crystal system. The conductivities are fairly high, e.g., around 450 Scm-1 at 600 °C for the x=0.3 compound. The TEC of the compounds is close to the values of ceria-based electrolytes. PSFN showed hysteresis in the temperature dependence of the conductivity, TEC and area-specific polarization resistance Rpol. It is considered that the hysteresis was caused by relatively slow adjustment of the oxygen stoichiometry. The electrochemical performance Rpol -1 of the PSFN compounds is similar to that of La 0.6Sr0.4Fe0.8Co0.2O 3-δ.

Original languageEnglish
Pages (from-to)1013-1020
Number of pages8
JournalSolid State Ionics
Volume176
Issue number11-12
DOIs
Publication statusPublished - 2005 Mar 31

Keywords

  • Cathode
  • Conductivity
  • Perovskite
  • Point electrode
  • Thermal expansion coefficient

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'A study of Pr<sub>0.7</sub>Sr<sub>0.3</sub>Fe<sub>1-x</sub>Ni <sub>x</sub>O<sub>3-δ</sub> as a cathode material for SOFCs with intermediate operating temperature'. Together they form a unique fingerprint.

  • Cite this

    Hashimoto, S. I., Kammer, K., Larsen, P. H., Poulsen, F. W., & Mogensen, M. (2005). A study of Pr0.7Sr0.3Fe1-xNi xO3-δ as a cathode material for SOFCs with intermediate operating temperature. Solid State Ionics, 176(11-12), 1013-1020. https://doi.org/10.1016/j.ssi.2004.09.010