固体氧化物燃料电池（SOFC）在长期实际运行中会经受各种侵蚀，如阴极会经受CO2、湿、铬等侵蚀。为推动SOFC发展，提高阴极在实际运行条件下的耐侵蚀性尤为重要。混合电导钙钛矿结构的阴极在中低温下具有较高活性，尤其Ba0.9Co0.7Fe0.2Nb0.1O3-δ(BCFN)表现出高的电化学活性和好的化学稳定性，但对其长期耐侵蚀性研究较少，机理也不清晰。针对此问题，本项目以BCFN为研究对象，评价CO2、湿、铬侵蚀下的性能及荷电下的长期稳定性，深入探讨CO2、湿、铬侵蚀机理，为SOFC商业化应用奠定基础。本项目将利用差热热重、高温XRD等对其在CO2、湿、铬侵蚀下的反应特性、结构演变进行研究；利用交流阻抗、程序升温脱附等对CO2、湿、铬侵蚀下的氧还原活性进行考察；通过原位拉曼、透射电镜及能谱分析产物组成，结合热力学计算阐明侵蚀机理。项目研究将为阴极材料体系的开发及应用提供理论依据和实验指导。

Solid Oxide Fuel Cell (SOFC) suffers different contaminations when the cell is operated under the practical application environment. For example, cathode suffers corrosion from CO2, water vapor, Cr and other impurities. Therefore, to promote the development of SOFC, it is vital to improve the corrosion resistance of SOFC cathode under the practical application environment. Mixed-conducting perovskite cathodes exhibit high catalytic activities in intermediate and low temperatures. Among those, Ba0.9Co0.7Fe0.2Nb0.1O3-δ(BCFN) has been widely studied due to its excellent electrochemical performance and chemical stability. However, there are few studies on its corrosion resistance properties and mechanism. In this project, the corrosion resistance properties of BCFN cathode under CO2, water vapor and Cr conditions will be evaluated; the mechanism and the long stability under corrosion will be systematically assessed. High temperature XRD and DTA-TG techniques will be used to study the changes of crystalline structure and the reaction property of BCFN under CO2, water vapor and Cr; electrochemistry impedance spectroscopy(EIS) and temperature programmed desorption (TPD) will be used to study the conduction characteristic and electrocatalytic property. At the same time, the mechanism of corrosion resistance will be characterized and elucidated through in-situ Raman spectrum and TEM analysis, combined with thermodynamic estimation method. Theoretical foundation and experiment guidance will be provided through this project for the development and practical application of cathode material in SOFC.