Recently LaNi1–xFexO3 materials have been indicated as good candidates for cathodes for intermediate temperature solid oxide fuel cells (IT-SOFCs), and LaNi0.6Fe0.4O3 (LNF) showed the highest specific conductivity in the LaNi1–xFexO3 series. Here we report the results of our investigation on the performances of LNF, synthesized by the coprecipitation method. A detailed local structure analysis, performed using X-ray absorption near edge spectroscopy (XANES ) and extended X-ray absorption fine structure (EXAFS) techniques, indicated that both Fe and Ni are in the (III) oxidation state with coordination numbers of ∼6, suggesting the absence of appreciable amount of oxygen vacancies.

Preparation, characterization and electrochemical properties of pure and composite LaNi0.6Fe0.4O3 – based cathodes for IT-SOFC

MONTINI, TIZIANO;TAVAGNACCO, CLAUDIO;FORNASIERO, Paolo;GRAZIANI, MAURO
2007

Abstract

Recently LaNi1–xFexO3 materials have been indicated as good candidates for cathodes for intermediate temperature solid oxide fuel cells (IT-SOFCs), and LaNi0.6Fe0.4O3 (LNF) showed the highest specific conductivity in the LaNi1–xFexO3 series. Here we report the results of our investigation on the performances of LNF, synthesized by the coprecipitation method. A detailed local structure analysis, performed using X-ray absorption near edge spectroscopy (XANES ) and extended X-ray absorption fine structure (EXAFS) techniques, indicated that both Fe and Ni are in the (III) oxidation state with coordination numbers of ∼6, suggesting the absence of appreciable amount of oxygen vacancies.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/1694283
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