Recent Progress in Sr₂Fe_1.5Mo_0.5O_6-δ-Based Multifunctional Materials for Energy Conversion and Storage

Perovskite oxides, particularly double perovskite oxides, have drawn significant research interest within the fields of solid-state chemistry and materials science. As a quintessential double perovskite oxide, Sr₂Fe_1.5Mo_0.5O_6-δ (SFM) has unique electronic, magnetic, and catalytic properties. These attributes make it a promising candidate for energy conversion and storage applications. This review offers a comprehensive overview of advancements using SFM across various applications, including solid oxide cells, protonic ceramic cells, and electrocatalysis. Notably, the review highlights emerging optimization strategies that enhance functionality based on a fundamental understanding of the reaction mechanisms. The review concludes by discussing the persistent challenges facing SFM-based functional materials, as well as their prospects, considering both fundamental research and industrial applications.