Determination of Oxygen Diffusion Coefficients in La1-xSrxFe1-yGayO3-δ Perovskites Using Oxygen Semi-Permeation and Conductivity Relaxation Methods
| Autor: | Aurélien Vivet, Pierre-Marie Geffroy, Y. Hu, G. Dezanneau, Thierry Chartier |
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| Přispěvatelé: | Axe 1 : procédés céramiques, Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Structures, Propriétés et Modélisation des solides (SPMS), Institut de Chimie du CNRS (INC)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Diffusion Analytical chemistry chemistry.chemical_element Relaxation (iterative method) [CHIM.MATE]Chemical Sciences/Material chemistry Permeation Conductivity Condensed Matter Physics Oxygen Surfaces Coatings and Films Electronic Optical and Magnetic Materials Membrane chemistry Materials Chemistry Electrochemistry Oxygen diffusion Physics::Chemical Physics Perovskite (structure) |
| Zdroj: | Journal of The Electrochemical Society Journal of The Electrochemical Society, Electrochemical Society, 2014, 161 (3), pp.F153-F160. ⟨10.1149/2.003403jes⟩ |
| ISSN: | 0013-4651 1945-7111 |
| DOI: | 10.1149/2.003403jes⟩ |
| Popis: | International audience; This paper reports new evidence that oxygen surface exchange and bulk diffusion in a mixed conductor can be simultaneously determined via the oxygen semi-permeation method. Herein, we report the use of an original apparatus for oxygen activity measurements at both membrane surfaces to evaluate the oxygen surface exchange and bulk diffusion coefficients. Oxygen surface exchange and bulk diffusion in the La1-xSrxFe1-yGayO3-δ perovskite series are also determined and compared with the results from three different methods: isotopic exchange, conductivity relaxation, and oxygen semi-permeation. Although the thermodynamic conditions for these methods are not exactly the same, the values obtained for the oxygen surface exchange and bulk diffusion coefficients are in good agreement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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