Reactivity in LaGaO3/Ni and CeO2/Ni systems

N. Solak*, M. Zinkevich, F. Aldinger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The reactivity in CeO2/Ni and LaGaO3/Ni systems, which are constituents of intermediate temperature solid oxide fuel cell (IT-SOFC) anodes, has been investigated both computationally and experimentally. The CALPHAD-method (CAL-culating of PHAse Diagrams), employing BINGSS and THERMOCALC software, was used to obtain a self-consistent set of Gibbs energy functions describing the systems. Interactions in the LaGaO3/Ni system were predicted using a thermodynamic database developed for the La-Ga-Ni-O system. Similarly, to analyze the CeO2/Ni system, the Ce-Ni-O ternary phase diagram was calculated using known thermodynamic data for binary Ce-O, Ni-O, and Ce-Ni systems. The experimental work was designed based on the calculated phase diagrams. While the La-Ga-Ni-O system experiments were conducted in air, the Ce-Ni-O system was also investigated in a reducing atmosphere. The calculated Ce-Ni-O diagram is in good agreement with the experimental results. It has been found that NiO does not react with CeO 2. Extended solid solutions of La(Ga,Ni)O3, La 2(Ni,Ga)O4, and La4(Ni,Ga)3O 10 were found in the La-Ga-Ni-O system. Additionally, the compound LaNiG11O19, with magnetoplumbite-type structure, has been found, which has not been reported in the literature so far. It is concluded that La2NiO4 is not chemically compatible, as a cathode material, with the LSGM electrolyte.

Original languageEnglish
Pages (from-to)87-92
Number of pages6
JournalFuel Cells
Issue number2
Publication statusPublished - Apr 2006
Externally publishedYes


  • Ceria
  • LaNiO
  • LSGM
  • Nickel
  • SOFC


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