Ferrite-based perovskites as cathode materials for anode-supported solid oxide fuel cellsPart II. Influence of the CGO interlayer

Sensitivity of Stresses and Failure Mechanisms in SOFCs to the Mechanical Properties and Geometry of the Constitutive Layers

“…Even though cracking of LSCF cathode has been reported [5,6], this would have generated unlikely results. Therefore, simulations were carried out with only the lowest temperature-dependent CTE, together with a smaller Young's modulus of 10 GPa reported for LSM [16].…”

“…Typical examples include the ceria-or yttria-based compatibility layer (GDC or YDC) to limit interactions between the yttria-stabilised zirconia (YSZ) electrolyte and a lanthanum strontium cobaltite ferrite (LSCF) cathode [5,6], and a compensating anode layer to reduce cell curvature, hence facilitate the assembly and current collection [7]. All SOFC designs are based on the concept of a distinct supporting layer, to facilitate and maximise the improvement of the electrochemical properties of the others.…”

Strontium Diffusion in Magnetron Sputtered Gadolinia‐Doped Ceria Thin Film Barrier Coatings for Solid Oxide Fuel Cells

“…However, at these temperatures CGO and YSZ form a solid solution which has a significantly lower oxide ion conductivity compared to both of the pure compounds. [21][22][23] An alternative way to fabricate CGO barriers are by physical vapor deposition techniques such as magnetron sputtering, pulsed laser ablation, and electron beam evaporation. [16,20,24] Studies comparing deposition techniques have provided evidence that CGO barrier layers fabricated by reactive magnetron sputtering show better performance.…”

“…[16,25] This may be associated with higher density of such layers reached at lower temperatures than by wet ceramic deposition techniques. [16,20,21,25] The effectiveness of the sputter deposited CGO as barrier is closely related to the microstructure and density of the film which can be controlled by tuning the deposition parameters such as deposition temperature and substrate bias voltage. [26] As these studies have shown, it is of great scientific interest to understand the Sr diffusion mechanism in order to tailor the microstructure of the barrier layer in such a way that Sr diffusion may be prevented and the improvements possible by using Fe-Co perovskite based cathodes can be fully utilized.…”

Carbon deposition behaviour in metal-infiltrated gadolinia doped ceria electrodes for simulated biogas upgrading in solid oxide electrolysis cells

“…A CGO interlayer was screen printed on the other side of the electrolyte using the same ink to prevent possible SrZrO 3 and La 2 Zr 2 O 7 phase formation between the electrolyte and the air electrode. [38,39] After sintering at 1350 °C in air for 2 hours, a CGO-(La 0.6 Sr 0.4 )(Co 0.2 Fe 0.8 )O 3-δ air electrode was screen printed on top of the interlayer and sintered at 900 °C for 2 hours.…”