新型氧离子导体La_2Mo_2O_9  

Novel La_2Mo_2O_9 Oxide-Ion Conductor

作　　者：阮北[1,2] 闫柏军[1] 张家芸[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]河北师范大学化学学院,石家庄050016

出　　处：《化学进展》2010年第1期44-50,共7页Progress in Chemistry

基　　金：国家自然科学基金项目(No.50604002)资助

摘　　要：La2Mo2O9是一种具有高离子导电性的新型氧离子导体,其氧离子电导率在1073K时高达0.06S/cm,与YSZ在1273K时的电导率相当。这种高的离子导电性使它在中温固体氧化物燃料电池、氧传感器、透氧膜、固态离子器件等领域有着重要的潜在应用前景。本文从La2Mo2O9的结构、性质、氧离子扩散机理及其掺杂改性4个方面综述了近年来La2Mo2O9基固体电解质的研究热点和新进展,为该固体电解质材料的研究提供了有价值的信息。La_2Mo_2O_9 is a novel type of oxide-ion conductor with high oxide-ion conductivity.Its conductivity is about 0.06 S/cm at 1 073K,which is comparable to that of yttria-stabilized zirconia at 1 273K.Consequently,it has potential applications in intermediate-temperature solid oxide fuel cells,oxygen sensors,oxygen permeable membrane,solid-state ionic devices,etc.In this paper,the recent research progresses regarding the structure,properties,doping,diffusion mechanism of oxide-ion in La_2Mo_2O_9 crystal are reviewed.Valuable information is provided,which will be beneficial for the future research on these oxide-ion solid electrolytes.

关 键 词：钼酸镧 固体电解质 氧离子 固体氧化物燃料电池 掺杂 

分 类 号：O614.33[理学—无机化学] O611.3[理学—化学]