Ba_(1-x)Pr_xCoO_3阴极材料在中温SOFC中的应用  

Application of Ba_(1-x)Pr_xCoO_3 Cathode Materials in IT-SOFC

作　　者：王金霞[1] 姚瑛[1] 许大鹏[2] 苏文辉[2] 

机构地区：[1]宁波工程学院电子与信息工程学院,宁波315016 [2]吉林大学物理学院凝聚态物理系,长春130023

出　　处：《高等学校化学学报》2007年第11期2146-2149,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:30370406);浙江省教育厅科研基金(批准号:20060349)资助

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,将抑制晶粒长大,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.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.

关 键 词：中温固体氧化物燃料电池(IT-SOFC) 阴极 热重-差热 烧结曲线 

分 类 号：O642.2[理学—物理化学] O614.33[理学—化学]