【摘要】 采用柠檬酸-硝酸盐自蔓延燃烧法合成了中温固体氧化物燃料电池阴极粉体Sm_0.1Sr_0.9Fe_0.2Co_0.8O_3-δ（SSFC）和Sm_0.1Sr_0.9Fe_0.2Co_0.7Ni_0.1O_3-δ（SSFCN）。通过X射线衍射（XRD）技术分析阴极材料的晶体结构，并通过扫描电子显微镜（SEM）来分析材料的组分。同时制备电解质Gd_0.1Ce_0.9O_2-δ（GDC）,构建对称电池SSFC|GDC|SSFC、SSFCN|GDC|SSFCN运用交流阻抗技术记录界面极化行为。结果表明：阴极粉体与GDC在900℃无相互作用，均呈现单一物相；B位掺杂Ni可以降低阴极的极化电阻。更多还原

【Abstract】 Intermediate temperature solid oxide fuel cell cathode powders Sm_0.1Sr_0.9Fe_0.2Co_0.7Ni_0.1O_3-δ（SSFC） and Sm_0.1Sr_0.9Fe_0.2Co_0.7Ni_0.1O_3-δ（SSFCN） are synthesized by citrate-nitrate self-propagation combustion method.The crystal structures of the cathode materials are evaluated by X-ray diffraction（XRD） technique and the components of the materials are analyzed by scanning electron microscopy（SEM）.The electrolyte Gd_0.1Ce_0.9O_2-δ（GDC） is also prepared to construct the symmetric cells SSFC|GDC|SSFC,SSFCN|GDC|SSFCN to record the interface polarization behavior applying AC impedance technique.The results show that the cathode powder and GDC have no interaction at 900 ℃,and both present a single physical phase.B-site doping of Ni can reduce the polarization resistance of the cathode.更多还原