中文摘要：

通过柠檬酸低温燃烧法合成了A位缺位的La_（0.6）Sr_（1.4）MgMoO_6-δ（x=0,0.02,0.04,0.06,0.08,0.1）固体氧化物燃料电池阳极材料。系统研究了A位缺位量对材料晶体结构、电导率以及电化学性能的影响规律。研究结果表明,A位缺位的LSMM均为双钙钛矿相结构,在5%H2/Ar还原气氛中经1250℃煅烧10 h具有良好的结构稳定性。A位缺位提高了LSMM在空气中的结构稳定性,随着缺位量的增加材料的电子电导率逐渐减小,阳极的极化电阻逐渐减小,电池的功率密度逐渐增加。

英文摘要：

（La_（0.6）Sr_（1.4）MgMoO_6-δ（x = 0,0.02,0.04,0.06,0.08,0.1） anode material for solid oxide fuel cell（SOFC） was synthesized via citrate acid-complex low temperature combustion method.The effects of A-site deficiency on lattice structure,electrical conductivity and electrochemical performance were systematically investigated.The results show that all of the LSMM with A-site deficient have a pure double perovskite structure,and have good structural stability after reducing in 5% H2/Ar at1250 ℃ for 10 h.A-site deficient can improve the structural stability in air.The electronic conductivity and the polarization resistance of La_（0.6）Sr_（1.4）MgMoO_6-δwere decreased with the A-site deficient amount increasing,resulting in the improved power density of single cell.