【摘要】 合成具有单相正交钙钛矿结构的La1-xSrxCuO3-δ(x=0.15,0.2,0.3,0.4)系列样品,碘量滴定法实验结果表明,随着Sr掺入量的增加,Cu3+离子的含量逐渐增加.电学性能研究结果表明,La0.7Sr0.3CuO3-δ电导率最高,与La0.6Sr0.4CoO3-δ相比,La0.7Sr0.3CuO3-δ具有更好的电化学性能,可作为一种新的中温固体氧化物燃料电池(IT-SOFC)阴极材料.将La0.7Sr0.3CuO3-δ与不同质量比的中温电解质Ce0.85Sm0.15O2-δ(SDC)固相混合,制备复合阴极材料,电化学性能测试结果表明,掺入适量的SDC有利于降低La0.7Sr0.3CuO3-δ电极的极化,获得性能更优越的IT-SOFC阴极材料,提高在中温区单电池的输出功率.更多还原

【Abstract】 The cathode material La_1-xSr_xCuO_3-δ（x=0.15,0.2,0.3,0.4）was synthesized by a sol-gel method.X-ray diffraction reveals that it is a single phase of perovskite.The investigation of the electrical properties suggest that La_0.7Sr_0.3CuO_3-δ has the highest electrical conductivity.La_0.7Sr_0.3CuO_3-δ powder was mixed with different amount of SDC(Sm_0.15Ce_0.85O_1.925) powder（5%-30%,mass fraction） as composite cathodes.Electrochemical properties of the composite cathodes were researched further.The investigation suggests the addition of appropriate amount SDC to La_0.7Sr_0.3CuO_3δ can improve the electrochemical properties,and a better cathodic performance can be obtained.Using La_0.7Sr_0.3CuO_3-δ-SDC composite materials as a cathode based on SDC electrolyte higher current density and power density can be obtained at intermediate temperatures.更多还原