Pr0.6Sr0.4CoO3-δ-Ce0.8Sm0.2O1.9复合阴极材料的性能

Performance of Pr0.6Sr0.4CoO3-δ-Ce0.8Sm0.2O1.9 composite cathode materials

采用甘氨酸硝酸盐法(GNP)制备Pr0.6Sr0.4CoO3-δ—xCe0.8Sm0.2O1.9(PSCxSDC,10%≤x≤40%)复合阴极材料,研究PSCxSDC的电性能、电化学性能、热膨胀性能。结果表明:PSC、SDC之间的化学相容性良好。PSCxSDC复合阴极材料的电导率在600~800℃中温范围内均远高于100S/cm,PSCxSDC中SDC最佳复合量为30%,1000℃煅烧的PSC30%SDC复合阴极材料与电解质接触良好,在750℃测得的界面极化电阻为0.054Ω·cm^2。PSC与SDC复合适当降低了阴极材料的热膨胀系数,PSC30%SDC的热膨胀系数为16.77×10^-6K^-1。

Pr0.6Sr0.4 CoO 3-δ-xCe0.8Sm 0.2O1.9 (PSC- x SDC,10%≤x≤40%) were synthesized by the glycine-nitrate process (GNP). Performance of electrochemical, electrical conductivity and thermal expansion for PSC- x SDC cathode materials were investigated. Results showed that PSC had good chemical compatibility with SDC. The corresponding electrical conductivities of PSC-x SDC were more than 100S/cm in the intermediate temperature range of 600~800℃. In the series of PSC-x SDC composite cathodes, the PSC-30%SDC cathode calcined at 1000℃ exhibited good contact with SDC and the lowest polarization resistance (0.054Ω·cm^2 ) at 750℃. The thermal expansion coefficient of PSC-30%SDC composite cathode was reduced to 16.77×10^-6 K^-1 .