Oxygen semi-permeation properties of La_1−xSr_xFeO_3−δ perovskite membranes under high oxygen gradient

Abstract

Abstract

Exploring the defect equilibrium and charge transport in electrode material La0.5Sr0.5Fe0.9Mo0.1O3−δ

“…Perovskite-type ferrites La 1Àx Sr x FeO 3Àd are known to possess a good combination of oxygen ion and electron conductivity and redox stability; therefore, they attract much attention as promising materials for oxygen transport membranes and electrodes of solid oxide fuel cells (SOFCs) and solid oxide electrolysis cells (SOECs). [1][2][3][4][5][6] The La : Sr ratio determines the average oxidation state of iron and the oxygen vacancy concentration, and therefore strongly affects the functionally important properties of the material. For instance, LaFeO 3 is characterized by very low electrical conductivity due to the nominal oxidation state of iron ions 3+.…”