Preparation and Performance of a La0.6Sr0.4CoxFe1−xO3 Cathode for Solid Oxide Fuel Cells

Microextrusion Printing of Multilayer Hierarchically Organized Planar Nanostructures Based on NiO, (CeO2)0.8(Sm2O3)0.2 and La0.6Sr0.4Co0.2Fe0.8O3−δ

“…One of the most frequently used compositions of intermediate-temperature electrolyte materials is solid solutions based on cerium dioxide doped with rare-earth oxides [11][12][13]. When considering electrode materials compatible with CeO 2 -based electrolytes in terms of their mutual chemical inertness and thermophysical characteristics, composite cathode materials are usually chosen, representing a mixture of perovskite oxides based on lanthanum cobaltite containing strontium and iron (La 1-x Sr x Co y Fe 1-y O 3-δ ), together with an electrolyte [14][15][16], as well as anode materials containing nickel or its oxide, combined with a solid electrolyte [17,18]. When searching for the optimal composition of cathode and anode materials, not only is the aim to reach a compromise between the linear thermal expansion coefficient and the value of the oxygen-ion conductivity of the electrodes, but it is also to reduce their polarization resistance and to promote an oxygen reduction reaction (ORR) on the cathode, as well as a hydrogen oxidation reaction (HOR) on the anode.…”

“…For oxides of complex composition based on lanthanum cobaltite doped with strontium and iron, combustion methods (glycolcitrate, citrate-nitrate, glycine-nitrate, etc.) are the most suitable way to synthesize them, corresponding to the specific chemical nature of their constituent oxides [16,55,56].…”