中文摘要：

利用溶胶-凝胶法制备了La0.7Sr0.3Cr0.5Mn0.5O3-δ（LSCM）阳极粉体。X射线衍射（XRD）分析结果显示,在1000℃下焙烧4 h处理后,粉体为单一的钙钛矿相结构。应用单向压力成型方法、空气中1450℃下烧结8 h制备了Ce0.8Sm0.2O1.9（SDC）为电解质片,应用丝网印刷方法在SDC电解质两侧分别涂覆La0.7Sr0.3Cr0.5Mn0.5O3-δ阳极和Pr0.6Sr0.4Co0.8Fe0.2O3-δ-SDC（PSCF-SDC）复合阴极,组成电解质支撑型固体氧化物燃料单电池。扫描电镜（SEM）观察显示,制备的电解质致密,阳极和阴极孔隙大小分布均匀,阳极厚度约为20μm,阴极厚度为10μm。用湿氢气作燃料,在800℃下获得的最大输出功率为232.84 mW/cm^2,短路电流为919.84 mA/cm^2。为了提高LSCM阳极材料催化活性,阳极中掺入少量SDC构成复合阳极。La0.7Sr0.3Cr0.5Mn0.5O3-δ-10%SDC复合阳极的单电池输出功率明显提高,最大输出功率为340 mW/cm^2。

英文摘要：

La0.7Sr0.3Cr1-xMnxO3-δ（x=0.3,0.4,0.5,0.6） powder were synthesized by using a sol-gel combustion method.The phases of the oxide powders calcined at 1000 ℃ were determined by X-ray diffraction（XRD）.The results showed that the single perovskite phase was obtained.SDC electrolyte-supported single cells of LSCM/SDC/PSCF-SDC were prepared.The pictures of SEM indicated that the anode was in porous state with the thickness of 20μm.Compact electrolyte was obtained.LSCM anode single cells feed with humidified hydrogen delivered a reasonable peak density of 232.84mW/cm^2 at 800℃.In order to improve the catalytic activity of LSCM anode materials,LSCM was doped with a certain amount of SDC.A reasonable peak density of 340mW/cm^2 at 800 ℃ for a single cell with La0.7Sr0.3Cr0.5Mn0.5O3-δ-10%SDC anode was obtained.