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中文摘要：
La0.6Sr0.4Co0.2Fe0.8O3-δ（LSCF）钙钛矿型复合氧化物具有优良的电子-离子混合导电性能,是目前温固体氧化物燃料电池（SOFC）最理想中的阴极材料之一。以水和乙醇作为溶剂,按照La0.6Sr0.4Co0.2Fe0.8的元素摩尔比为6∶4∶2∶8的元素比配制溶液,采用超声喷雾裂解方法,在700℃时通过喷雾裂解制备球形LSCF粉体。该粉体和GDC电解质按照7∶3的比例,制备阴极浆料,涂于NiO-GDC｜｜GDC半电池电解质表面,并在1150℃烧结制备电池阴极。通过SEM、XRD等表征手段研究粉体以及电池阴极结构,并研究了LSCF-GDC复合阴极材料的电性能。研究表明,该电池在750℃条件下的电池性能达到了553 mW·cm^-2,电池性能比固相法制备的阴极粉体性能高出111 mW·cm^-2,展现了较好的电催化活性。
英文摘要：
Perovskite type oxide La0.6Sr0.4Co0.2Fe0.8O3-δ（LSCF） is currently one of the most ideal SOFC cathode materials. LSCF powders with pure perovskite structure and uniform particle size were synthesized by ultrasonic spray pyrolysis method at 700 ℃. The crystallinity and morphological features of the LSCF powders were characterized by scanning electron microscopy（SEM）, and X-ray diffraction（XRD）. The powders are almost spherical with a diameter in the range of 0.2-2μm. Cathode was formed on Ni O-GDC｜｜GDC half fuel cells, according to the mass ratio between GDC∶LSCF = 3∶7. The polarization resistances of fuel cell with such cathode was 0.35 Ω·cm^2 at 750 ℃, leading to a peak power density of 553 mW·cm^-2, which is 111 mW·cm^-2 higher than that of the solid phase synthesized LSCF cathode.
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