Electrochemical Study of IT-SOFC Unit Cell Prepared By Tape Casting Process and Co-sintering

Abstract

Anode-supported electrolyte with a large electrode area of 7.5×7.5 cm2 was fabricated using tape casting method aided by co-sintering process, in which the thickness of electrolyte layer is about 10 μm. SEM morphology showed the thin film of electrolyte with dense and crack-free structure which was formed between anode and cathode. As a result, open circuit voltage (OCV) of unit cell was around 1.1 V and its maximum power density was 0.214 W/cm2 at 800{degree sign}C. Impedance results of unit cell indicated that the ohmic resistance was 0.267 Ωcm2 at 800{degree sign}C, which was a suitable for the operation of SOFC at the intermediate temperature. In this study, we demonstrated that the tape casting process aided by co-sintering method is a suitable method for the mass production of planar SOFC unit cell with large electrode area.