Architectured Interfaces and Electrochemical Modelling in an Anode Supported SOFC
This approach was applied to the anode/electrolyte interface of a SOFC based on standard compositions, YSZ (or YDC) for the electrolyte, and YSZ (or YDC) + nickel for the anode. The corrugation of surfaces was obtained through the patterning of this interface with different geometries (flat, pyramids, shallow and deep ellipsoids) at the 10-100 µm scale by cold pressing, templating or serigraphy. Thin electrolyte layers have been deposited on top of these architectures by Atomic Layer Deposition (ALD). In parallel, an electrochemical model was carried out and implemented by considering masses and charges conservation, gas transport and electrochemical reaction kinetics 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.