中文摘要：

为探索适于中温条件下使用的固体氧化物燃料电池的阴极材料，用固相反应法制备了Gd0．8Sr0．2CoO3（GSC）阴极粉体，用X射线衍射考察了GSC的成相温度。采用丝网印刷法将GSC-（Sm2O3）0．1（CeO2）0．8（SDC）沉积在SDC电解质圆片上，制成对称阴极，在不同温度下烧结。用交流阻抗谱从．500～750℃测量了GSD-SDC复合阴极和SDC电解质之间的界面电阻。结果表明，GSC-SDC复合阴极的界面电阻比GSC阴极降低了3～5倍；750℃时，GSC—SDC阴极的界面电阻仅为0．15Ω·cm^2。

英文摘要：

Gd0. 8 Sr0.2 CoO3 （GSC） was prepared by solid state reaction （SSR） for intermediate temperature solid oxide fuel cell （ITSOFC）. Symmetrical electrodes of GSC were coated on Sm0.2Ce0.8O1.9 （SDC） by screen-printing and sintered at temperature from 850- 1050℃. The electrochemical properties of the interfaces between GSC cathodes and SDC electrolytes were investigated using AC impedance spectroscopy. The results show that the interracial resistance of GSC-SDC cathode is 3-5 times lower than that of GSC cathode at the same temperature. The interracial resistance of GSC-SDC cathode is only 0.15Ω·cm^2 at 750℃.