Multi-scale 3D imaging of absorbing porous materials for solid oxide fuel cells. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Materials Science Année : 2014

Multi-scale 3D imaging of absorbing porous materials for solid oxide fuel cells.

Résumé

The performance of advanced functional materials for fuel cell applications are closely linked to the material composition and morphology at the micro and nano-scales. 3D characterization techniques that can provide bulk information at these fine scales are therefore essential for microstructure optimization of these materials. Here, the X-ray nano-holotomography technique is used to image various multi-phase and absorbing solid oxide fuel cell electrodes. Different porous structures for typical commercial cells and innovative electrode designs obtained using a freeze-casting process are studied. Taking advantage of the geometrical setup and the use of high energy X-rays, both large reconstructions (field of view: 150 A mu m) and local tomography at higher resolution (field of view: 50 A mu m) can be performed on the same sample to have a multi-scale approach. This produces highly representative sample volumes with a size/resolution ratio that allows the geometric and physical properties of the materials to be calculated, e.g., connectivity of each phase, mean particles diameters, specific surface area, particle size distributions, tortuosity factors, and densities of triple boundary lengths.

Domaines

Matériaux
Fichier non déposé

Dates et versions

hal-01073076 , version 1 (08-10-2014)

Identifiants

Citer

J. Villanova, P. Cloetens, H. Suhonen, J. Laurencin, F. Usseglio-Viretta, et al.. Multi-scale 3D imaging of absorbing porous materials for solid oxide fuel cells.. Journal of Materials Science, 2014, 49 (16), pp.5626-5634. ⟨10.1007/s10853-014-8275-3⟩. ⟨hal-01073076⟩
118 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More