Development of Metal-Supported Planar SOFCs Fabricated by All Wet Process on Metallurgical Porous Substrates

Abstract

In this study, metal-supported solid oxide fuel cells (MSCs) are successfully fabricated by all-wet process on the porous stainless-steel substrate. This stainless-steel substrate is made by a powder metallurgy technique which can control its porosity and shrinkage behavior. MSCs were fabricated by co-firing with electrolyte and anode layers with the substrate. This process is similar to that of conventional anode supported cells. Anode and electrolyte layers were coated on the porous metal substrate by screen printing. Then, these layers were sintered by co-firing at 1250 ºC in a reducing atmosphere. The cathode is sintered at 750 ºC in air before electrochemical measurement, keeping the reducing atmosphere on the anode and substrate side. The MSC prepared by the all-wet process on porous stainless-steel substrate showed 1.0 W cm-2 of maximum power output at 750 ºC. This process is expected to contribute the low-cost fabrication of large size MSCs.