为发展中温固体氧化物燃料电池阴极材料,固相反应法制备了Bi0.99Ba0.11O1.445(BSB)粉,用X-ray衍射方法考察了其成相温度,表明在700℃烧5h,已基本成β-斜方六面体结构.并与Ag复合制成复合阴极,研究了烧结温度对复合阴极微结构的影响.同时以Sm0.2Ce0.8O1.9(SDC)为电解质,用交流阻抗法研究BSB含量对复合阴极的界面阻抗的影响发现,50%(体积分数)BSB时,界面阻抗最小,在650℃和700℃时分别为0.32Ω·cm2和0.12Ω·cm2,比Ag基其它复合阴极材料如Ag-SDC,Ag-YSZ的界面极化电阻要小得多.
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