高氧离子电导钙钛矿的影响因素分析和设计策略

Oxygen conductor, such as perovskite oxide (ABO₃-type), are widely applied to fuel cell, oxygen sensors and oxygen permeable membranes. Improving the oxygen transport performance within perovskite oxide lattice is the key to increasing the efficiency of the oxygen conductor equipment. The transport performance of perovskite oxygen ions is affected by complex factors such as crystal structure, A/B site ions, anions and oxygen vacancies, which brings great challenges to the development of perovskite materials with high oxygen ion conductivity. This article first analyzes the mechanism of oxygen transport in the perovskite, and summarizes in detail the common factors that control the oxygen transport in the perovskite, including the crystal structure, the concentration of oxygen vacancies and the distribution of oxygen vacancies. Then focus on the analysis of the way and mechanism of these influencing factors on the oxygen transport process of the perovskite, and introduces the simple means and principles of regulating these influencing factors. This article further clarifies the prediction method for the oxygen transport performance of perovskite and the corresponding characterization method, such as O₂-temperature programmed desorption, X-ray absorption spectroscopy, high-resolution transmission electron microscopy and theoretical calculations. Combining theoretical calculations and experimental results, we can directly observe the internal microscopic properties of the material to promote the understanding of the oxygen ion transport process of the perovskite oxide. This paper aims to find a more accurate and convenient design strategy to rapidly screen perovskite oxides with high oxygen ion conductance.