中温SOFC阴极材料La_(0.7)Sr_(0.3)Co_(1-x)Cu_xO_(3-δ)的制备及性能  

Preparation and Performance of Cathode Materials of La_(0.7)Sr_(0.3)Co_(1-x)Cu_xO_(3-δ) for IT-SOFC

作　　者：荆波[1] 吕喆[2] 许大鹏[1] 苏文辉[1] 

机构地区：[1]吉林大学物理学院,长春130021 [2]哈尔滨工业大学凝聚态科学与技术研究中心,哈尔滨150001

出　　处：《吉林大学学报（理学版）》2005年第5期650-653,共4页Journal of Jilin University:Science Edition

基　　金：国家"863"计划项目基金(批准号:2001AA323090)

摘　　要：采用固相反应法制备了La0.7Sr0.3Co1-xCuxO3-δ系列中温固体氧化物燃料电池(SOFC)阴极材料粉体.对其进行晶体结构表征,高温电导率和热膨胀曲线测试,并选取其中性能较好的样品进行了单电池实验.结果表明,Cu的掺杂降低了(La,Sr)CoO3体系阴极材料的热膨胀系数,在x=0.05时电导率略高于未掺Cu的样品.以La0.7Sr0.3Co0.95Cu0.05O3-δ为阴极、Ce0.8Sm0.2O1.9为电解质组成的SOFC单电池,在850℃最大短路电流密度达511 mA/cm2,最大输出功率密度约为0.106 W/cm2.The powders of cathode material LA0.7Sr0.3Co1-xCuxO3-δ for intermediate temperature solid oxide fuel cell （IT-SOFC） were prepared with the solid reaction method. The crystal structure, high temperature conductivity and thermal expansion curve of these samples were characteristiced and a selected sample was tested in the single cell. The results show that the thermal expansion coefficients of （La, Sr）CoO3 are decreased by Cu doping, while the conductivity at x = 0.05 is higher than that of the one without Cu. A single fuel cell with LA0.7Sr0.3Co1-xCuxO3-δ as the cathode and Ce0.8 Sm0.2 O1.9 as the electrolyte was tested, the maximum current density was 511 mA/cm^2, and the maximum power density was 0. 106 W/cm^2 at 850 ℃.

关 键 词：中温固体氧化物燃料电池 阴极材料 LA0.7Sr0.3Co1-xCuxO3-δ 

分 类 号：TM911.4[电气工程—电力电子与电力传动]