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Caractérisation électrochimique de matériaux céramiques à microstructure contrôlée pour Piles à Combustible SOFC fonctionnant à température réduite

Abstract : This study deals with the elaboration and the characterisation of the three components of a SOFC cell working at intermediate temperature (650-750°C).
A pure ionic conductivity of 9x10-3 S.cm-1 was found at 700°C for the retained electrolyte of composition La9Sr1Si6O26.5. This material with an apatite structure is chemically compatible with the mixed conducting cathode material Nd1.95NiO4+Δ. The study of the oxygen reduction process showed that the reaction is limited by the oxide ions transfer at the interface cathode/electrolyte. The anodic cermet Ni-apatite was elaborated by impregnation of the porous matrix with a nickel salt. This method allowed a better stabilisation of the nickel phase in the host structure. Thus this work provides evidence for the interest of a new ITSOFC based on a silicate electrolyte.
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https://tel.archives-ouvertes.fr/tel-00103670
Contributor : Annabelle Brisse <>
Submitted on : Thursday, October 5, 2006 - 9:16:47 AM
Last modification on : Thursday, November 19, 2020 - 1:50:06 PM
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Annabelle Brisse. Caractérisation électrochimique de matériaux céramiques à microstructure contrôlée pour Piles à Combustible SOFC fonctionnant à température réduite. Matériaux. Université Joseph-Fourier - Grenoble I, 2006. Français. ⟨tel-00103670⟩

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