La_(1.9)Ba_(0.1)Mo_(1.9)Al_(0.1)O_(8.8)电解质材料的制备及性能研究  

Preparation and Property of La_(1.9)Ba_(0.1)Mo_(1.9)Al_(0.1)O_(8.8) Electrolyte Material

作　　者：田长安[1] 曹严[1] 尹奇异[1] 谢劲松[1] 王春阳[1] 杨娟[1] 王明[1] 阳杰[1] 

机构地区：[1]合肥学院化学与材料工程系,合肥230601

出　　处：《硅酸盐通报》2013年第12期2554-2558,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51102073);安徽省自然科学基金(1308085QB35);教育部项目(201211059006,201211059007,201211059011);安徽省教育厅项目(KJ2012B154,KJ2013B229);江苏省新型环保重点实验室开放课题基金(AE201361)资助

摘　　要：采用溶胶-凝胶法制备了电解质材料La1.9Ba0.1Mo1.9Al0.1O8.8(LBMA),通过热重-差示扫描量热分析(TGDSC)、X射线衍射(XRD)、透射电镜(TEM)、扫描电镜(SEM)和电化学阻抗谱(EIS)等方法对样品进行测试研究。研究表明干凝胶经700℃煅烧处理即可得到立方相氧化物LBMA,煅烧后的粉体为分散性较好的球形纳米颗粒,平均粒径约为35 nm。SEM分析和致密度研究表明溶胶-凝胶法制备的粉体具有良好的烧结性能,在1100℃烧结2 h能得到相对密度高于98%的致密的陶瓷烧结体。电化学性能研究表明LBMA具有较高的离子电导率,1100℃烧结的LBMA电解质在800℃时电导率达到17.87 mS/cm,电导活化能为1.22 eV,其有望应用于中低温固体氧化物燃料电池。La1.9Ba0.1M01.9A10.1O8.8 samples were characterized by th and EIS spectrum, respectively. after the precursor was calcined .s （LBMA） ermogravim The results at 700 ℃ electrolyte material was synthesized by sol-gel method. The etric-differential thermogravimetric analysis, XRD, TEM, SEM show the powders with pure fluorite structure can be obtained The TEM microphotographs show that the calcined powders are spherical nano-particles with good dispersion, and the average grain size of the powders is 35 nm. The SEM analysis and density determination show that the as-prepared powders have good sinterability and the relative density of the electrolyte pellet sintered at 1100 ℃ for 2 h is over 98%. The electrical conductivity was measured using two-probe impedance spectroscopy. The sample cal exhibits a conductivity of 17.87 mS/cm at 800 ℃, and the activation energy is 1.22 e LBMA is a promising electrolyte for intermediate-to-low temperature solid oxide fuel ce cined at 1100 ℃ V, indicating that 11.

关 键 词：固体氧化物燃料电池 La2Mo2O9 溶胶一凝胶 电导率 

分 类 号：O614[理学—无机化学]