Impact of Mn4+ ion substitution on La0.4Sr0.6Fe1-xMnxO3 perovskite conductivity (x = 0.2, 0.4 and 0.6) as a solid fuel cell cathode

Abstract

Abstract The samples La0.4Sr0.6Fe1-xMnxO3 (x = 0.2, 0.4, and 0.6) as solid fuel cell cathodes have been successfully synthesized and characterized. Samples were made using the solid-state reaction method with the wet milling technique. X-ray diffraction is used to see the phases formed. Surface morphology in the form of particle shape and size is characterized using scanning electron microscopy, while electronic conductivity at room temperature is measured by measuring its resistivity. Sample x = 0.4 has a single phase, while two other samples, x = 0.2 and 0.6 are still detected secondary phase. Surface morphology has a heterogeneous grain shape with a size between 63-250 nm. The best electronic conductivity at room temperature is obtained at a composition of x = 0.4 of 3.39 x 10-3 S.cm-1 so that it can be used as a candidate material for a solid fuel cell cathode.