中文摘要：

考察了造孔剂的种类、尺寸、形貌等对Pr0.6Sr0.4（Co0.2 Fe0.8）Sc0.05O3-δ（PSCFS）阴极电催化性能和电极微观结构的影响。通过XRD和BET表征了不同温度焙烧的PSCFS粉体的晶相结构和比表面积，用交流阻抗法和SEM检测了PSCFS／GDC／PSCFS对称电池的电化学性质和截面形貌。结果表明：乙基纤维素（EC）为造孔剂的阴极极化阻抗最小，650℃时为0．18Ω·cm-2，-2μm的球状石墨有利于降低阴极的极化阻抗。

英文摘要：

The effects of species, size, and morphology of pore formers on the microstructure and electrochemical performance of Pr0. 6 Sr0. 4 （ Co0. 2 Fe0.8 ） Sc0.05 O3-δ （ PSCFS ） solid oxide fuel cell （ SOFC ） cathode were investigated. The AC electrochemical impedance spectra measurements were carried out on PSCFS/GDC/PSCFS symmetrical cells. The cathodes with ethyl cellulose （EC） as pore former, the least polarization resistance, eg. 0. 18 Ω . cm-2 at 650 ℃, and the cathodes with - 2μm sphere graphite （GRA） pore formers showed smaller resistance than cathodes with GRA in other sizes was got. The SEM cross - sectional images of cathodes indicated that the cathodes with 1 - 2 μm macro pores and 〈 500 nm micropores showed better cathode performance.