Stabilizing Perovskite Structure by Interdiffusional Tailoring and Its Application in Composite Mixed Oxygen-Ionic and Electronic Conductors.

Perovskite oxides have been under intense investigation as promising candidates for devices in the field of energy conversion and storage. Unfortunately, these perovskites are probably subjected to a frequent performance loss caused by phase transition. A phase-stabilization approach via interdiffusional tailoring is identified in perovskite-based composites. As an example, a phase-stabilized perovskite-fluorite composite material with both components possessing cubic symmetry was obtained by an appropriate one-pot strategy. These findings render possible to develop a high-performance and extremely stable dual-phase oxygen-transporting membrane for intermediate-temperature air separation as well as syngas production, which also opens up numerous opportunities to overcome the phase-transition-induced performance degradation in other systems.