采用固相反应法合成了中温固体氧化物燃料电池阴极材料BaCo0.7Fe0．2Nb0．1O5＋δ（BCFN）．结果表明：BCFN与电解质La0．9Sr0．1Ga0．8Mg0．2O2．85（LSGM）在10000C烧结5h没有生成其他杂相，表明其与LSGM电解质在高温时具有很好的化学兼容性．BCFN在700℃时极化电阻仅为0．128Ωcm2．在800℃时，BCFN的过电位为49mV时的电流密度是46mAcm-2．%Cathode material BaCo0.7Fe0.2Nb0.1O5＋δ （BCFN） for intermediate - temperature solid oxide fuel cell （ IT - SOFC） is prepared by solid - state reaction method. The results show that BCFN cathode is chemically compatible with the intermediate - temperature electrolyte LSGM. No chemical reaction of the binary - mixed BCFN - LSGM system is detected upon sintering at 1000℃ for 5 h. The polarization resistance for BCFN cathode is as low as 0. 128 Ω cm2 at 700℃. The overpotential for BCFN is 49 mV when current density is 46 mA cm -2 at 800℃.
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