Evaluation of the La0.75Sr0.25Mn0.8Co0.2O3-d system as cathode material for ITSOFCs with La9Sr1Si6O26.5 apatite as electrolyte
| Autor: | Pierre-Marie Geffroy, Sophie Beaudet-Savignat, Claire Bonhomme, Thierry Chartier, Anne-Laure Sauvet |
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| Přispěvatelé: | 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), CEA Le Ripault (CEA Le Ripault), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Axe 1 : procédés céramiques, 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Oxide Mineralogy 02 engineering and technology Electrolyte Tape casting 010402 general chemistry 7. Clean energy 01 natural sciences law.invention chemistry.chemical_compound law Materials Chemistry Fast ion conductor Ionic conductivity Apatite Fuel cells Perovskite (structure) Composites 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Dielectric spectroscopy chemistry Chemical engineering Ceramics and Composites Electrical properties 0210 nano-technology |
| Zdroj: | Journal of the European Ceramic Society Journal of the European Ceramic Society, 2009, 29, pp.1781-1788. ⟨10.1016/j.jeurceramsoc.2008.11.009⟩ Journal of the European Ceramic Society, Elsevier, 2009, 29, pp.1781-1788. ⟨10.1016/j.jeurceramsoc.2008.11.009⟩ |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2008.11.009⟩ |
| Popis: | International audience; In the past years, a major interest has been devoted to decrease the working temperature of solid oxide fuel cells (SOFCs) down to about 700 ◦C. Apatite materials (La10−xSrxSi6O27−x/2) are attractive candidates for solid electrolytes, with a high ionic conductivity at 700 ◦C, a chemical and a dimensional stability for a pO2 ranging from 10−25 to 0.2 atm. A perovskite oxide (La0.75Sr0.25Mn0.8Co0.2O3−δ) has been used as a cathode material. Symmetrical cathode/electrolyte/cathode cells were fabricated by stacking layers obtained by tape casting of apatite and perovskite powders and co-sintering at 1400 ◦C for 2 h in air. Impedance spectroscopy measurements were performed on these cells in order to determine the electrode resistance. It has been shown that the latter decreases with the porosity content of the cathode and with the use of a composite material (apatite/perovskite) instead of a simple perovskite. |
| Databáze: | OpenAIRE |
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