Electrical Property of La0.7Sr0.3Cr0.5-yMn0.5-zCo(y+z)O3±δ as Anode of SOFC

摘要：

La<,0.7>Sr<,0.3>Cr<,0.5>Mn<,0.4>Co<,0.1>O<,3±δ> anode material was synthesized by glycine nitrate process. X-ray diffraction patterns indicate that single perovskite phase was created after sintering the predecessor at 1623K for 5h. By means o fourprobe direct current, the electrical conductivities of La <,0.7>Sr<,0.3>Cr<,0.5>Mn<,0.4>Co<,0.1>O<,3±δ> were tested in different atmospheres, the maximum values were 10.2S· cm<-1> in air, 4.5S·cm<-1> in CH<,4> and 0.42S·cm<-1> in H <,2> at 1073K, respectively. The compatibility between La<,0.7> Sr<,0.3>Cr<,0.5>Mn<,0.4>Co<,0.1>O<,3±δ> and La<,0.9>Sr <,0.1>Ga<,0.8>Mg<,0.2>O<,3-δ> were investigated via X-ray diffraction and scanning electron microscopy, which shows that La <,0.7>Sr<,0.3>Cr<,0.5>Mn<,0.4>Co<,0.1>O<,3±δ> oxide, has good chemical and thermal compatibility with La<,0.9>Sr <,0.1>Ga<,0.8>Mg<,0.2>O<,3-δ>. An electrolyte supported single cell consisted of La<,0.7>Sr<,0.3>Cr<,0.5>Mn<,0.4>Co <,0.1> O<,3±δ>|La<,0.9>Sr<,0.1>Ga<,0.8>Mg<,0.2>O<,3- δ>| La<,0.9>Sr<,0.1>Ca<,0.1>Fe<,0.8>Co<,0.2>O<,3±δ> was fabricated through screen printing method. The open circuit voltage of the cell is about 0.92V, and the maximum power density is about 75mW·cm<-2> at 1123K.

关键词： perovskite glycine nitrate process anode solid oxide fuel cell rare earths

作者: He Enquan(何恩全) Ma Wenhui(马文会) Yu Jie(于洁) Liu Ronghui(刘荣辉) Dai Yongnian(戴永年)

作者单位: Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, China

会议类型: 国际会议

会议名称: 第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)

会议地点: 包头

会议语种:英文

页码: 382-386

在线出版日期: 2007-08-07（万方平台首次上网日期，不代表论文的发表时间）