Impact of the Sr content on the redox thermodynamics and kinetics of CaSrMnO for tailored properties.

CaMnO-based perovskites find application in a variety of thermochemical cycles, oxygen partial pressure adjustment, chemical looping processes, and thermochemical energy storage. The applicability of these materials is governed by their thermodynamic and kinetic properties. Therefore, tunability of these properties is desirable to adapt the material to the required conditions.

Controlling thermal expansion and phase transitions in CaSrMnO by Sr-content.

Perovskite oxides of the general formula ABO, with A and B being metal cations, present themselves in various crystal structures that originate from a distorted ideal cubic perovskite. Understanding how composition, temperature, atmosphere and reduction extent of these non-stoichiometric redox materials induce structural changes on an atomic, as well as macroscopic, level is crucial to transfer newly developed materials to industrial scale applications in the redox-based energy conversion sector. Herein, CaSrMnO ( ∈ [0,0.