Abstract
The development of solid oxide electrochemical cells (SOCs) coincides with the policy of emission peak and carbon neutrality, and possesses significant commercial prospects in the future energy market. Developing perovskite oxides with mixed oxygen ionic and electronic conductivity is an effective approach to alleviate the issues caused by lowering the operating temperature and the utilization of hydrocarbon fuel. Recently, Sr2Fe1.5Mo0.5O6-δ with double perovskite structure exhibits high conductivity, excellent redox stability and catalytic activity in both air and hydrogen environments, and presents broad application prospects in SOCs. Surface modification and element doping further enhance the electro-catalytic activity of the Sr2Fe1.5Mo0.5O6-δ electrode, enabling a broader application prospect in SOCs. This review summarizes the structures, properties, applications, shortcomings, and optimizations of the Sr2Fe1.5Mo0.5O6-δ-based oxides in detail. The research and development of the Sr2Fe1.5Mo0.5O6-δ-based oxides have specific guidance and assistance for the progress of intermediate temperature SOCs.
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