论文部分内容阅读
利用甘氨酸-硝酸盐燃烧法合成La1.0Sr1.0FeO4+δ(LSF1010)钙钛矿材料。XRD结果表明,材料具有K2NiF4层状结构。制备La1.0Sr1.0FeO4+δ-Sm0.2Ce0.8O1.9(LSF1010-SDC)复合材料,并考察了它们作为中温固体氧化物燃料电池的阴极性能。XRD结果表明:经1000℃烧结,La1.0Sr1.0FeO4+δ和SDC之间没有化滨反应发生。就LSF1010-30%SDC电极而言,SEM结果显示经1000℃烧结2h可以得到较好的电极微观结构,电极和电解质之间可以形成较好的接触。和纯LSF1010电极相比,LSF1010-SDC复合电极表现出了较好的阴极性能。尤其是LSF1010-30%SDC电极对氧还原反应拥有最好的催化活性。700℃时,在SDC电解质上,LSF1010-30%SDC电极的极化电阻为0.80Ω·cm2,和纯LSF1010电极相比,极化电阻差不多降低了5倍,在150m A·cm-2极化电流作用下,阴极过电势为?86mV。
Synthesis of La1.0Sr1.0FeO4 + δ (LSF1010) Perovskite Material by Glycine - Nitrate Combustion. XRD results show that the material has a K2NiF4 layered structure. La1.0Sr1.0FeO4 + δ-Sm0.2Ce0.8O1.9 (LSF1010-SDC) composites were prepared and their cathode performances were investigated as medium temperature solid oxide fuel cells. XRD results show that there is no ablation reaction between La1.0Sr1.0FeO4 + δ and SDC after sintering at 1000 ℃. For the LSF1010-30% SDC electrode, SEM results show that the microstructure of the electrode can be obtained by sintering at 1000 ℃ for 2h, and the electrode and electrolyte can form better contact. The LSF1010-SDC composite electrode shows better cathode performance than the pure LSF1010 electrode. In particular, LSF1010-30% SDC electrode has the best catalytic activity for oxygen reduction. At 700 ℃, the polarization resistance of LSF1010-30% SDC electrode was 0.80Ω · cm2 on the SDC electrolyte. The polarization resistance of the LSF1010-30% SDC electrode decreased about 5 times compared with that of the pure LSF1010 electrode. At 150m A · cm -2 polarization Under the action of current, the cathode overpotential is? 86mV.