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Compatibility of La2NiO4 cathodes with LaGaO3 electrolytes: A computational approach by Nuri Solak; Matvei Zinkevich; Fritz Aldinger is a Materials Science article available to read on EtoBox.

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The available literature information on the phase equilibria for the La-Ga-Ni-O system has been assessed. Based on the known thermodynamics of boundary oxygen containing systems, La-Ni-O, La-Ga-O, and Ga-Ni-O, and experimental data on phase equilibria in the La 2 O 3 -Ga 2 O 3 -NiO quasiquaternary system, models have been defined to describe the Gibbs energy of the individual phases. The model parameters have been optimized by least-squares fit to selected experimental information using the CALPHAD-method (Calculation of Phase Diagrams). Chemical potential diagrams of the systems representing fabrications and cathode-anode side operation conditions of LaGaO 3 -based solid oxide fuel cells (SOFC) were calculated. It has been determined that, neither in fuel cell fabrication conditions nor in operation conditions un-doped LaGaO 3 electrolytes and La 2 NiO 4 cathodes are stable in equilibrium with each other but will react to form another phases.

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Author

Nuri Solak; Matvei Zinkevich; Fritz Aldinger

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0167-2738)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)