Preparation of SDC Interlayer and Influence on Performances of Anode Supported Solid Oxide Fuel Cells
A single cell with a two-layer electrolyte consisting of an yttria stabilized zirconia (YSZ, Y2O3 8 mol%) layer and an Sm-doped ceria (SDC, Sm2O3 20mol%) interlayer has been fabricated on porous YSZ-NiO anode support. The layer of YSZ electrolyte was prepared by modified electrostatic powder coating method and the SDC interlayer by screen-printed method on the green YSZ layer. After co-firing at 1400°C for 5 h, the two-layer film with a dense YSZ film of about 15μm and porous SDC film of about 25μm was fabricated. The performances of as-fabricated single cell using La0.8Sr0.2FeO3 as cathode were tested using H2-3% H2O as fuel and air as oxidant at 800°C. Results indicated that the peak power density of a single cell with SDC interlayer reaches 469 mW/cm2 at 800°C, obviously higher than that of without SDC interlayer, which is about 300 mW/cm2 at 800°C.
Wei Pan and Jianghong Gong
W. T. Bao, J. F. Gao, G. Y. Meng, "Preparation of SDC Interlayer and Influence on Performances of Anode Supported Solid Oxide Fuel Cells", Key Engineering Materials, Vols. 336-338, pp. 486-489, 2007