Architectured interfaces and electrochemical modelling in an anode supported SOFC

Maya Geagea (1) , Jian Ouyang (2) , Bo Chi (2) , Francesco Delloro (1) , Anthony Chesnaud (1) , Armelle Ringuedé (3) , Michel Cassir (3) , Alain Thorel (1)

1 CDM - Centre des Matériaux
2 HUST - Huazhong University of Science and Technology [Wuhan]
3 LECIME - Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie (LECIME - UMR 7575)

Increasing the SOFC performances is many-fold: i/ at low current density, through the enhancement of the catalytic properties of the electrodes, ii/ at the ohmic loss region, through lower resistance, iii/ at the high current density region, via the optimization of the electrodes microstructure. The present work proposes to explore how the corrugation of electrode/electrolyte interfaces impacts the performances of SOFCs. Taking ideas from the battery community, this approach was applied to the anode/electrolyte interface of a SOFC based on standard compositions. Patterning of this interface was achieved with different geometries at the 10-100µm scale by cold pressing. Thin electrolyte layers have been deposited on top of these architectures by different techniques. In parallel, an electrochemical model was carried out and implemented throughout the interface in FEM (finite element method) with COMSOL Multiphysics. The results showed a 25 % increase in the total current density for a certain ellipsoid geometry.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Maya Geagea, Jian Ouyang, Bo Chi, Francesco Delloro, Anthony Chesnaud, et al.. Architectured interfaces and electrochemical modelling in an anode supported SOFC. SOFC-XIV: Anodes 2, Jul 2015, Glasgow, United Kingdom. ⟨10.1149/06801.2961ecst⟩. ⟨hal-01199302⟩