Y_0.08Sr_0.88TiO₃-CeO₂ Composite as a Diffusion Barrier Layer of STS-Supported SOFC

Abstract

Metal-supported SOFC (MS-SOFC) is promising for use at intermediate temperature range (500-700°C) since metal could provide the good thermal conductivity and the mechanical strength in addition to the low cost. The MS-SOFCs are often fabricated by co-firing of in reducing atmosphere to avoid metal oxidation. However, the inter-diffusion between Fe/Cr in stainless steel (STS) and Ni in the anode is detrimental to the electrochemical performance of the cell. In this study, Y0.08Sr0.88TiO3-CeO2 composite was used as a diffusion barrier layer (DBL). The effect of DBL and the cell performance will be discussed.