Effect of Electrolyte/Cathode Interface Structure on Cathode Performance of Solid Oxide Fuel Cells

本文采用火焰喷涂和涂覆相结合的方法制备了结构化Pt阴极。采用SEM观察阴极的组织结构，采用电化学交流阻抗谱法研究了结构化阴极极化行为，探讨了电解质/阴极界面结构对阴极极化的影响规律。结果表明，电解质表面结构对阴极极化性能有重要影响，在温度小于850℃时，结构化Pt阴极极化约为平直界面阴极极化的0.3~0.75倍。 In this paper, a structured Pt cathode is prepared by flame spraying and slurry coating. The microstructure of the cathode is characterized by SEM. The electrochemical behavior of single cell with the structured cathode is charac- terized by the electrochemical impedance spectroscopy. Effect of electrolyte/cathode interface structure on electro- chemical behavior is discussed. The results show that the electrolyte surface structure has an important influence on cathode polarization. When the temperature is less than 850˚C, the cathode polarization of the cell with a structured electrolyte is approximately 0.3 to 0.75 times of that with a flat electrolyte.