Oxygen electrode characteristics of Pr2NiO4 + δ-infiltrated porous (La0.9Sr0.1)(Ga0.8Mg0.2)O3-δ

Justin G. Railsback, Zhan Gao, Scott A. Barnett*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Pr2NiO4 + δ was wet infiltrated into porous LSGM scaffolds to form solid oxide cell oxygen electrodes on LSGM-electrolyte symmetrical cells. The minimum calcination temperature required to form this nickelate phase was between 950 °C and 1000 °C. X-ray diffraction measurements of electrodes tested at 650 °C showed little evidence of any phase change, in contrast to 650 °C annealed Pr2NiO4 + δ powders that decomposed to Pr4Ni3O10 and Pr6O11. Polarization resistance followed an Arrhenius temperature dependence with an activation barrier of 1.40 eV, and a value as low as 0.11 Ω cm2 was observed at 650 °C for a Pr2NiO4 + δ loading of 14 vol.%. The present resistance values appear to be the lowest reported to date for a Ruddlesden-Popper phase electrode, and are competitive with perovskite-structure electrodes. The low resistance, combined with the good stability of infiltrated Pr2NiO4 + δ and the advantages of being Co- and Sr-free, make this an exciting new contender for intermediate-temperature solid oxide cell applications.

Original languageEnglish (US)
Pages (from-to)134-139
Number of pages6
JournalSolid State Ionics
Volume274
DOIs
StatePublished - Jun 1 2015

Keywords

  • Electrolysis
  • IT-SOFC
  • KNiF
  • Nickelate
  • Ruddlesden-Popper
  • Solid oxide fuel cell

ASJC Scopus subject areas

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

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