The solid oxide fuel cell technology offers substantial potential for clean and efficient power generation. La1-xSrxFe1-yMnyO3-δ (LSFM) perovskites are potential materials used as cathode for intermediate temperature solid oxide fuel cell (ITSOFC). They (x=0.1, 0.2, 0.3 and 0.4;y=0.1,0.2 and 0.3) were synthesized by a citrate method. The formed process of perovskite structure was analyzed using TG/DTA analysis. XRD showed the optimum formation of a single perovskite phase is 800℃. Electrical conductivity was measured by a four-probe DC method and La0.6Sr0.4Fe0.9Mn0.1O3-δ shows the highest conductivity. The oxygen nonstoichiometry was measured by Iodometric method. These perovskites display the oxygen deficient composition. LSFM,with increasing the number of Sr and Fe, increase the amount of oxygen vacancies.The synthesized La0.6Sr0.4Fe0.9Mn0.1O3-δ and La0.9Sr0.1Ga0.8Mg0.2O3-δ are chemically and thermally compatible well in XRD and SEM results. In conclusion, the LSFM can be considered as a promising cathode material for ITSOFC.%固体氧化物燃料电池技术提供清洁、高效的发电方式.La1-xSrxFe1-yMnyO3-δ (LSFM)钙钛矿作为中温固体氧化物阴极材料受到人们的关注.本文用柠檬酸盐法合成了La1-xSrxFe1-yMnyO3-δ (x=0.1, 0.2, 0.3,0.4;y=0.1,0.2,0.3)钙钛矿阴极材料.使用同步热分析仪(TG/DTA)研究了钙钛矿结构的形成历程.XRD衍射结果证明单一钙钛矿相的最佳形成温度是800℃.采用直流四探针法测试了样品的电导率,其中La0.6Sr0.4Fe0.9Mn0.1O3-δ显示了最高值.用碘量法测量了LSFM中的非化学计量氧值.随着Sr与Fe的增加,非化学计量氧值增大.通过XRD与SEM分析,La0.6Sr0.4Fe0.9Mn0.1O3-δ与 La0.9Sr0.1Ga0.8Mg0.2O3-δ之间显示出较好的化学和热相容性.结果表明LSFM有望作为中温固体氧化物燃料电池的阴极材料.
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