Thermo-elastic properties of SOFC/SOEC electrode materials determined from three-dimensional microstructural reconstructions |
| |
| Authors: | G. Delette J. Laurencin F. Usseglio-Viretta J. Villanova P. Bleuet E. Lay-Grindler T. Le Bihan |
| |
| Affiliation: | 1. CEA-LITEN, 17 rue des martyrs, F-38054 Grenoble Cedex 9, France;2. ESRF, 6 rue Jules Horowitz BP 220, 38043 Grenoble, France;3. CEA, LETI, MINATEC Campus, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France;4. CEA, DAM, Le Ripault, F-37260 Monts, France |
| |
| Abstract: | Thermo-mechanical properties of SOFC/SOEC electrodes have been computed by homogenization from three-dimensional reconstructions of their microstructure. The support and the functional layer of a Ni/YSZ supported cell and the oxygen electrode made of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) have been studied. Values of the effective Young's modulus obtained for the thick porous Ni/YSZ support are in good agreement with the experimental data (E = 35 GPa). Besides, for thin functional layers, the methodology supplies original values that are difficult to obtain by conventional experimental methods (E = 105 GPa for the Ni/YSZ Functional Layer and E = 55 GPa for the LSCF electrode). Furthermore, it has been shown that the effective elastic parameters are influenced by the following morphological parameters: the porosity and the formation factor that could also be related to the manufacturing process. Theses morphological parameters have however negligible effect on the effective thermal expansion. |
| |
| Keywords: | SOFC SOEC Electrode Mechanical properties Homogenization Microstructure |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
