Conductivity and electrochemical characterization of PrFe1-xNixO3-δ at high temperature

S. Hashimoto, K. Kammer, F. W. Poulsen, M. Mogensen

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

PrFe1-xNixO3-δ (x = 0.4-0.6) compounds were synthesized and characterized by powder XRD, electrical conductivity and electrochemical impedance spectroscopy on point electrodes on a Ce0.9Gd0.1O2-δ (CGO10) electrolyte. As a reference, the electrochemical performance of LaFe0.4Ni0.6O3-δ was also measured. The main phase in the PrFe1-xNixO3-δ series was perovskite-type structure and belonged to the orthorhombic crystal system. The conductivities are fairly high, e.g. around 220 S cm-1 at 873 K for the x = 0.4 compound. The electrochemical performance of the PrFe1-xNixO3-δ series is similar to that of La0.6Sr0.4Fe0.8Co0.2O3-δ, which is a good candidate as a cathode material for SOFCs operating at intermediate temperature. The electrochemical performance of LaFe0.4Ni0.6O3-δ was even higher than that of the PrFe1-xNixO3-δ series and the polarization resistance was 0.14 Ω cm2 at 1073 K measured on a point electrode.

Original languageEnglish
Pages (from-to)256-261
Number of pages6
JournalJournal of Alloys and Compounds
Volume428
Issue number1-2
DOIs
Publication statusPublished - 2007 Jan 31

Keywords

  • Ceramics
  • Crystal structure and symmetry
  • Electronic transport
  • Fuel cell
  • X-ray diffraction

ASJC Scopus subject areas

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

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