Integrated Cr and S poisoning of a La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) cathode for solid oxide fuel cells

Abstract

Strontium segregation in a La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) electrode reacts with Cr and S in a solid oxide fuel cell (SOFC), which can cause cell performance deterioration.

Surface Regulating of a Double‐Perovskite Electrode for Protonic Ceramic Fuel Cells to Enhance Oxygen Reduction Activity and Contaminants Poisoning Tolerance

“…To date, extensive efforts have been devoted to studying the Cr deposition behavior and the resulting poisoning effects on (La, Sr)MnO 3‐ δ (LSM)‐based [ 19–23 ] and (La, Sr) (Co, Fe)O 3– δ (LSCF)‐based cathodes [ 24–31 ] for O‐SOFCs. For instance, Li et al.…”

Effect of calcium doping on the electrocatalytic activity of the Bi1−xCaxFeO3−δ oxygen electrode for solid oxide fuel cells

“…3c displays the Fe 2p 3/2 spectra of the BCF x samples. According to the reports, three subpeaks centered at 711.7–712.1 eV, 710–710.9 eV, and 709.0–709.4 eV are related to Fe 4+ , Fe 3+ , and Fe 2+ , respectively, 29,30 and the fitting results of are listed in Table S1 †. The average valence states of Fe are +3.058, +3.119, and +3.233 for BCF0.1, BCF0.2, and BCF0.3, respectively.…”

Assessment of Protective Coatings for Metal-Supported Solid Oxide Electrolysis Cells

“…It is widely used for intermediate temperature SOFCs because of its mixed ionic and electronic conductivity and oxygen reduction reaction catalytic activity . However, Cr vapor species, such as CrO 3 and CrO 2 (OH) 2 , react with LSCF and form SrCrO 4 , leading to an increase of ohmic resistance and polarization resistance. , For the porous metal supports used here, the growth of the chromia oxidation layer in the air atmosphere is a source of Cr vapor species . To prevent Cr poisoning, extensive efforts have been devoted to developing mitigation strategies including discovery of Cr-tolerant catalysts and Cr-getter materials.…”