Fabrication and Generation of Intermediate Temperature Operating SOFCBased on Y-doped BaZrO_3 Proton Conducting Oxides

摘要

An electrolyte supported intermediate temperature SOFC (ITSOFC)using 15 mol% Y-doped BaZrO_3 (BZY15) is fabricatedand tested in the temperature range from 550°C to 650°C to studyfundamental properties of an IT-SOFC using proton conductors.The measurement of I-V characteristics and impedance spectrareveal that BZY15 is superior to oxygen ionic conductors as anelectrolyte material from the viewpoint of electrolyte resistance inthe tested temperature range. The results also confirm the necessityof reducing cathodic overpotential.