Abstract: La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) precursor powder was synthesized by the urea combustion method as cathode catalyst. From the XRD patterns，fine powders with perovskite structure were obtained by calcining at 800 ℃. At 400～900 ℃，LSCF powder had high conductivity，which satisfied the needs of the cathode of solid oxide fuel cell. The electrochemistry performance and desulfurization performance of the single solid oxide fuel cell，(CoS-Mo2S)/BaCe0.9-xZrxY0.1O3(BCZY)/LSCF，with the cathode catalyst LSCF were measured at different temperatures while H2S was the fuel. The results showed that the maximum current density，maximum power density and H2S removal were improved by increasing temperature. At 850℃，the maximum current density of the fuel cell was 39.52 mA·cm－2 and the maximum power density was 6.38 mW·cm－2，when the flow rate of H2S was 50 mL/min. The removal of H2S was 72% at 900℃.

摘要： 采用尿素燃烧法制备La0.6Sr0.4Co0.2Fe0.8O3-δ（记作LSCF，下同）钙钛矿型阴极催化剂前体粉末，经800℃锻烧后具有典型的钙钛矿结构。在400～950 ℃温度范围内，催化剂具有较高的电导率，满足固体氧化物燃料电池阴极的要求。研究了以H2S为燃料气时，单体固体氧化物燃料电池(CoS-Mo2S)/BaCe0.9-xZrxY0.1O3/LSCF在不同温度下的电化学性能以及脱硫性能。结果表明：电池的最大电流密度、最大功率密度以及对H2S的脱除率均随温度的升高而增大；在反应温度为850 ℃，燃气流量为50 mL/min的条件下，电池的最大电流密度和最大功率密度分别为39.52 mA/cm2，6.38 mW/cm2；900 ℃时，H2S的脱除率达72%。