Preparation and performance of IT-SOFC with anode-supported thin GDC electrolytes by tape casting process

摘要

A modified tape casting technique was employed to fabricate Ce{sub}0.9Gd{sub}0.1O{sub}1.95 (GDC) electrolyte films, Ni/GDC cermet anode (with 60 wt.% NiO) membranes, as well as anode support/GDC film hi-layers. The slurry preparation and the membrane formation process, particularly the sintering process were routinely studied. The porosity, pore size distribution and electrical conductivity of the obtained membranes were characterized, and the coherency of the electrolyte film to the anode support was investigated. Performance of the SOFC based on the hi-layer structure and screen-printed La{sub}0.6Sr{sub}0.4Co{sub}0.2Fe{sub}0.8O{sub}3 (LSCF) cathode was tested in a H{sub}2-3%H{sub}2O/air configuration. A maximum power density of 110 mW/cm{sup}2 was obtained for the cell with a 150 μm thick GDC electrolyte at 650°C.