中文摘要：

采用湿化学法合成系列阴极材料Ba1-xPrxCoO3（x=0．3，0．4，0．5，0．6）．TG—DTA和烧结曲线测试结果表明，在950℃时样品发生相变，形成了晶相．样品的SEM结果显示，Pr离子掺杂到一定量时，将抑制品粒长大，减少阴极的孔洞率．单电池测量结果表明，用x=0．5的阴极材料制成的单电池表现出最好的输出特性，具有最大短路电流密度和最大输出功率密度，是掺杂Y的BaCeO3基电解质的一种优化配比阴极材料．

英文摘要：

Cathode materials Ba1-x PrxCoO3 （x = 0.3, 0.4, 0. 5, 0. 6） were prepared with wet chemical method. TG-DTA and sintering curves show that the materials were crystallized in a single perovskite phase at around 950 ℃. The SEM images show that the prohibition of the particle growth and the decrease of the hole ratio were produced when the increase of Pr ions dopant to a certain quantity. The results of the single cell tests show that the fuel cell with the cathodes x = 0. 5 have the best output performance and the greatest short current density and the maximum output power density, so it has more proper ratio than the other samples and fit Y^3＋ -doped BaCeO3 based solid electrolyte material perfectly.