Oxygen nonstoichiometry and valence state of manganese in La_1-xCa_xMnO_3+δ

Perovskite oxides are intriguing materials that offer considerable substitutional flexibility at the cation site. We can harness the wealth of properties facilitated by the substitution in materials design, but it also presents complex, sparsely explored phase diagrams that obscure the utility. In our recent paper, we present a materials science study of ABO₃-type perovskite LaMnO₃ focusing on the effects of Calcium doping (x=0–0.5) at the A site and temperature on the defect chemistry pertaining to oxygen non-stoichiometry and Mn charge state. The resulting data can inform rational functionalization within the application scope of LaMnO₃, spanning solid oxide fuel cells, electrolyzers, oxygen sensors, and supercapacitors.