A Solid Oxide Fuel Cell with Lanthanum and Calcium Co-Doped Strontium Titanate as Support

Abstract

Alternative anodes are of great interest for robust solid oxide fuel cells (SOFCs). A-site deficient strontium titanate co-doped with lanthanum and calcium, La0.2Sr0.25Ca0.45TiO3 (LSCTA-), has been investigated as a potential anode for SOFCs. Flat multilayer ceramics have been produced by controlling the sintering behavior of LSCTA-, resulting in a 450 µm thick porous LSCTA- scaffold with a well adhered 40 µm dense YSZ electrolyte. Impregnation of CeO2 and Ni has resulted in power densities of 0.96 Wcm-2 at 800 oC, higher than 0.125 Wcm-2 without impregnation and 0.38 Wcm-2 for Ni alone, demonstrating encouraging performance. Work continues to improve understanding of catalyst-scaffold interactions and scaling up the concept.