Compatibility between strontium-doped ferrite cathode and metallic interconnects in solid oxide fuel cells

Multi-scale analysis of the diffusion barrier layer of gadolinia-doped ceria in a solid oxide fuel cell operated in a stack for 3000 h

“…One of the main contributions to the poor performance and degradation comes from the cathode electrode. Several authors have evaluated the importance of cation diffusivities for surface segregation of Sr and thus for a major degradation mechanism of SOFC cathodes [4,5]. Currently, mixed ionic-electronic conductors (MIECs), such as lanthanum strontium cobalt iron oxide La 1-…”

Evaluation of Using LaNi0.6Fe0.4O3–δ Contact Layer Between La0.6Sr0.4FeO3 Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

“…The mixed ionic-electronic conductors (MIECs), such as La 1-x Sr x CoO 3 (LSC), La 1-x Sr x Co 1-y Fe y O 3 (LSCF) or La 1-x Sr x FeO 3 (LSF), are being investigated because they provide high power densities at lower temperatures [13][14][15]. However, several studies have shown that Sr-doped perovskite contact materials react with chromium from the surface of metallic interconnect to form SrCrO 4 [16]. One solution to avoid the crystallization of this phase is to use LaNi 1-x M x O 3 (M=Co or Fe) coatings with a high electrical conductivity [17,18].…”