The research and development of new Solid Oxide Fuel Cell cathode materials is an area of intense activity. The kinetic coefficients describing the O 2 -reduction mechanism are the O-ion diffusion ( D chem ) and the O-surface exchange coefficients ( k chem ). These parameters are strongly dependent on the nature of the material, both on its bulk and surface atomic and electronic structures. This review discusses the method for obtaining the kinetic coefficients through the combination of electrochemical impedance spectroscopy with focused ion-beam 3D tomography measurements on porous electrodes (3DT-EIS). The data, together with oxygen non-stoichiometry thermodynamic data, is analysed using the Adler-Lane-Steele model for macro-homogeneous porous electrodes. The results for different families of oxides are compared: single- and double-layered perovskites with O-vacancies defects, based on La-Sr cobalt f...

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固体氧化物燃料电池中的氧还原反应：从动力学参数测量到电极设计

新型固体氧化物燃料电池正极材料的研究和开发是一个活跃的领域。描述O 2还原机理的动力学系数是O离子扩散（D chem）和O表面交换系数（k chem）。这些参数在很大程度上取决于材料的性质，既取决于其体积，又取决于表面的原子和电子结构。这篇综述讨论了通过结合电化学阻抗谱和在多孔电极上聚焦离子束3D层析成像测量（3DT-EIS）来获得动力学系数的方法。使用宏均匀多孔电极的Adler-Lane-Steele模型分析数据以及氧气非化学计量热力学数据。比较了不同氧化物系列的结果：