新型中温SOFC阴极材料Sm_(0.5)Sr_(0.5)VO_4的制备与性能分析  

Preparation and performance of new cathode material Sm_(0.5)Sr_(0.5)VO_4 for ITSOFC

作　　者：孙雪丽[1] 王成力[1] 孙俊才[1] 李嵩[1] 季世军[1] 任玲[1] 

机构地区：[1]大连海事大学机电与材料工程学院,辽宁大连116026

出　　处：《大连海事大学学报》2007年第2期20-22,52,共4页Journal of Dalian Maritime University

摘　　要：为降低固体氧化物燃料电池（SOFC）的工作温度,发展新型中低温固体氧化物燃料电池阴极材料,采用固相反应方法,将元素Sr替代Sm进行掺杂制备一种新型阴极材料Sm0.5Sr0.5VO4.XRD谱图显示, 在900 ℃下处理的样品形成了单相稳定的四方钙钛矿结构晶体,其晶格常数比没有进行掺杂的SmVO4晶格常数略微降低,说明Sr已经很好地掺杂进入SmVO4的晶格结构中;在650～750 ℃,单电池最大输出功率密度为209.5 mW/cm^2,最大输出电流密度为138.3 mA/cm^2.制备的阴极材料显示了良好的电化学性能.A novel cathode material Sm0.5 Sr0.5 VO4 was synthesized by solid-state reaction method using Sr instead of Sm doped with SmVO4 for preparing an intermediate temperature solid oxide fuel cell （ITSOFC） so as to reduce the operation temperature. It was found that the tetragonal perovskite structure formed at 900 ℃ and the lattice parameters kept nearly the same as those of not doping with SmVO4. It meant that Sm was well doped by Sr. The maximum power density and the maximum current density of the cell obtained at 750℃ were 209.5 mW/cm^2 and 138.3 mA/cm^2 respectively. The cell performance shows that Sm0.5Sr0.5VO4 is a kind of potential material as the cathode for SOFCs operating just at intermediate temperatures.

关 键 词：固体氧化物燃料电池 阴极材料 Sm0.5Sr0.5VO4 固相反应 四方钙钛矿结构 

分 类 号：O613[理学—无机化学]