Synthesis and electrochemical characterization of La_0.75Sr_0.25Mn_0.5Cr_0.5−xAl_xO₃, for IT‐ and HT‐SOFCs

Abstract

The main emphasis of this work is to create a new perovskite material with three different compositions (La 0.75 Sr 0.25 Mn 0.5 Cr 0.5−x AlxO 3 , x = 0.1, 0.2, 0.3) applied in both Intermediate-and High-temperature Solid Oxide Fuel Cells (IT-and HT-SOFCs). Perovskite-type polycrystalline La 0.75 Sr 0.25 Mn 0.5 Cr 0.5−x Al x O 3−δ (x = 0.1, 0.2, 0.3) powders were synthesized and formed in a single phase structure by a dry chemistry route (standard solid-state reaction method). The effect of Al doping on physicochemical and surface properties has been discovered. The compounds were crystallized in single phase rhombohedral symmetry (R-3C Space. Group). Total conductivity of Al doping in wet 5% H 2 was higher than both dry 5% H 2 and air. The obtained results enhance the electro-catalytic performance and the material conductivity as well, which will be good for anode materials in IT-and HT-SOFCs and the optimum doping is 10%. K E Y W O R D S AC conductivity, binding energy, electrical conductivity, perovskite, XPS F I G U R E 1 Rietveld refinement profile of XRD data of La 0.75 Sr 0.25 Mn 0.5 Cr 0.3 Al 0.2 O 3−δ in the rhombohedral symmetry [Color figure can be viewed at wileyonlinelibrary.com] How to cite this article: Abdalla AM, Kamel M, Hossain S, Irvine JTS, Azad AK. Synthesis and electrochemical characterization of La 0.75 Sr 0.25 Mn 0.5 Cr 0.5−x Al x O 3 , for IT-and HT-SOFCs.