Impact of Cr-poisoning on the conductivity of LaNi0.6Fe0.4O3

M.K. Stodolny, Bernard A. Boukamp, David H.A. Blank, F.P.F. van Berkel

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24 Citations (Scopus)


This study demonstrates the significant impact of Cr on the electronic conductivity of a LaNi0.6Fe0.4O3 (LNF) porous cathode layer at 800 °C. Vapor transport of Cr-species, originating from a porous metallic foam, and subsequent reaction with LNF, results in a decrease of the electronic conductivity of the LNF-layer. Cr has been detected throughout the entire cross-section of a 16 μm thick LNF layer, while Ni, besides its compositional distribution in the LNF layer, has also been found in enriched spots forming Ni-rich metal oxide crystals. Transmission electron microscopy revealed that Cr is gradually incorporated into the LNF-grains, while Ni is proportionally expelled. Electron diffraction performed in the center of a sliced grain showed the initial rhombohedral crystal structure of LNF, whereas diffraction performed close to the edge of the grain revealed the orthorhombic perovskite crystal structure, indicating a Cr-enriched perovskite phase. Progressive Cr deposition and penetration into the LNF grains and necks explains the electronic conductivity deterioration. The impact of Cr-poisoning on the electronic conductivity of the LNF porous layer is considerably smaller at 600 °C than at 800 °C.
Original languageUndefined
Pages (from-to)9290-9298
Number of pages9
JournalJournal of power sources
Issue number22
Publication statusPublished - 2011


  • Perovskite
  • IR-81916
  • SOFC interconnect
  • METIS-280121
  • Cr-poisoning
  • SOFC cathode
  • LNF
  • Cr vapor transport

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