【作者】 陈孔发； 吕喆； 陈相君； 艾娜； 黄喜强； 苏文辉；

【Author】 CHEN Kong-fa Lü Zhe CHEN Xiang-jun AI Na HUANGXi-qiang SU Wen-hui (Department of Physics,Harbin Institute of Technology,Harbin 150001,China)

【机构】 哈尔滨工业大学物理系；

【摘要】 采用固相混合法和浸渍法分别在阳极支撑的氧化钇稳定的氧化锆（YSZ）薄膜上制备了 La_0．7Sr_0．3MnO₃ （LSM）-Sm_0．2Ce_0．8O_1．9（SDC）复合阴极．结果表明,使用浸渍阴极的单电池获得更好的输出性能；但浸渍阴极的孔隙率较低,在高温区容易出现浓差极化现象．通过降低浸渍阴极的厚度,可以有效地提高电极的气体扩散速率．通过调整浸渍电极的厚度,可以在不同温度下获得理想的电池性能．采用4μm 厚浸渍阴极的单电池,800℃的最高功率密度为1100mW/cm²；采用28μm 厚浸渍阴极的单电池,600℃的最高功率密度为295mW/cm²．更多还原

【Abstract】 La_0.7Sr_0.3MnO₃ （LSM）-Sm_0.2Ce_0.8O_1.9 （SDC） composite cathodes were fabricated on anode-supported yttrin-stabilized zirconia （YSZ） films by solid-state mixing and impregnation methods,respectively.The results showed that the single cell based on the cathode fabricated by the impregnation process produced a better output performance.At the same time,electrode concentration polarization was readily observed due to insufficient cathode porosity at high operating temperatures.Through lowering the cathode thickness,the gas transport rate at the cathode was promoted effectively.Considerable cell performance could be achieved at various temperatures by using the impregnated cathode with varied thickness.Using a 4μm-thick impregnated cathode,the single cell yielded a maximum power density of 1100 mW/cm² at 800℃.On the other hand,using a 28μm-thick impregnated cathode,the single cell yielded a maximum power density of 295 mW/cm² at 600℃.更多还原