【摘要】 通过共沉淀法制备了Al₂O₃-CeO₂复合材料，并将其作为电解质应用于半导体离子燃料电池（SIFC）。探究了Al₂O₃、CeO₂物质的量之比不同的Al₂O₃-CeO₂复合电解质对SIFC电化学性能的影响。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对材料进行了表征。其中，Al₂O₃、CeO₂物质的量之比为1∶0.5的Al₂O₃-CeO₂（1∶0.5）电池获得了最佳性能，在550℃下，开路电压为1.099 V时最大功率密度为1 142 mW·cm^-2。得益于复合电解质在测试气氛下两相间的界面效应，Al₂O₃-CeO₂（1∶0.5）电池在较低测试温度下取得了优异的混合离子传导和功率输出性能。更多还原

【Abstract】 Al₂O₃-CeO₂ composite was prepared by coprecipitation method and used as electrolytes in semiconductor ionic fuel cells（SIFCs）.We investigated the impact of Al₂O₃-CeO₂ composite electrolyte with different molar ratio of Al₂O₃ and CeO₂ on the electrochemical performance of fuel cells.The composites were characterized by X-ray diffraction （XRD）,X-ray photoelectron spectroscopy （XPS）,scanning electron microscopy （SEM）,and transmission electron microscopy （TEM） techniques.Among the composites,the obtained Al₂O₃-CeO₂ when the molar ratio was 1∶0.5 exhibited the best performance,and its maximum power density was 1 142 mW·cm^-2 when the open-circuit voltage was 1.099 V at 550℃.Furthermore,the Al₂O₃-CeO₂ cell displayed excellent mixed ionic conduction and power output performance due to the interface effect of the composite material as the fuel cell electrolyte in the test atmosphere.更多还原