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新型La₂Mo₂O₉基氧离子导体的研究进展

Research Status of the Novel La₂Mo₂O₉-based Oxide-ion Conductors

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【Author】 FANG Qian-Feng, WANG Xian-Ping, Cheng Zhi-Jun, ZHANG Guo-Guang ( Department of Materials Sciences and Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China; Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Heifei 230031, China)

【机构】南昌航空工业学院材料科学与工程系；中国科学院固体物理研究所材料物理重点实验室；南昌航空工业学院材料科学与工程系南昌 330034 中国科学院固体物理研究所材料物理重点实验室；合肥 230031；南昌 330034；

【摘要】自2000年Lacorre等人报道La2Mo2O9具有较高的氧离子电导率以来,La2Mo2O9 基氧离子导体由于具有优异的性能而受到人们的关注．本文综述了新型氧离子导体La2Mo2O9 的研究现状．重点介绍了纯La2Mo2O9及其掺杂体系的结构与相变、氧离子电导率、氧空位扩散机理、化学稳定性和热膨胀系数等性能．已有的研究结果表明,基于La2Mo2O9的氧离子导体可望在固体氧化物燃料电池、氧传感器、透氧膜等方面得到应用．更多还原

【Abstract】 La₂Mo₂O₉-based oxide-ion conductors have attracted more and more attention since they were reported having high ionic conductivity in 2000 by Lacorre et. al. In this paper the recent investigation on the novel La2Mo2O9-based oxide-ion conductors is reviewed. It is focused on the structure and phase transition, oxide-ion conductivity, mechanism of oxygen vacancy diffusion, chemical stability, and thermal expansion coefficient in the pure and doped La2Mo2O9 samples. It is pointed out that the La2Mo2O9-based oxide-ion conductors could be possibly applied in the field such as solid oxide fuel cells, oxygen sensors, oxygen permeable membrane.更多还原