Metal-supported solid oxide fuel cells are expected to offer several potential advantages over conventional anode (Ni-YSZ) supported cells, such as increased resistance against mechanical and thermal ...stresses and a reduction in materials cost. When Ni-YSZ based anodes are used in metal supported SOFC, electrode material from the active anode layer may interdiffuse with the metallic support during sintering. The purpose of this work is to illustrate how the interdiffusion problem can be circumvented by using an alternative anode design based on porous and electronically conducting layers, into which electrocatalytically active materials are infiltrated after sintering. The paper presents the recent results on the electrochemical performance and durability of the novel planar metal-supported SOFC design. The results presented in the paper show that the novel cell and anode design has a promising performance and durability at a broad range of temperatures and is especially suitable for intermediate temperature operation.
Porous membrane structures consisting of a combination of metallic and ceramic layers have many potential advantages and properties compared with conventional materials used in high temperature ...electrochemical devices and specific filter applications. The metal-ceramic composites can potentially improve functionality, reliability and reduce the manufacturing cost by enabling the use of more economical materials. This work will present a fabrication route based on tape-casting, a cost-efficient and upscalable process, which has been developed to fabricate such composite layers with tailored and graded porosity. By combining metal powder (e.g. ferritic stainless steel) and ceramic powder (e.g. zirconia or SrTiO^sub 3^-based materials) the different properties of the materials can be combined and exploited during processing and in the end product. The graded structure can be further modified by infiltration of various nanostructured materials (e.g. catalytically active materials) and/or be combined with a gas-tight ceramic membrane layer in a single co-sintering step.
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