Architectured Interfaces and Electrochemical Modelling in an Anode Supported SOFC

• Published in: ECS transactions Vol. 68; no. 1; pp. 2961 - 2969
• Main Authors: Geagea, Maya, Ouyang, Jian, Chi, Bo, Delloro, Francesco, Chesnaud, Anthony, Ringuedé, Armelle, Cassir, Michel, Thorel, Alain
• Format: Journal Article
• Language: English
• Published: 2015
• ISSN: 1938-5862; 1938-6737
• DOI: 10.1149/06801.2961ecst

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