在La0.7Sr0.3Co0.95Cu0.05O3-δ中掺入不同比例的Ce0.8Sm0.2O1.9制成中温固体氧化物燃料电池(IT-SOFC)复合阴极材料,对其进行晶体结构表征和高温电导率、热膨胀系数和阴极过电位测试.结果表明,Ce0.8Sm0.2O1.9的掺入不但有效地降低了La0.7Sr0.3Co0.95Cu0.05O3-δ阴极材料的热膨胀系数,而且Ce0.8Sm0.2O1.9掺入量为10%(质量分数,下同)的样品,其电导率高于La0.7Sr0.3Co0.95Cu0.05O3-δ,并且它在相同过电位下其阴极电流密度也大于其他样品.以其为阴极的SOFC单电池,在850 ℃最大短路电流密度达511 mA/cm2,最大输出功率密度为106 mW/cm2.
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