Li_2O掺杂Li_(3x)La_(2/3-x)TiO_3固体电解质的制备及性能  

PREPARATION OF Li_2O-DOPED Li_(3x)La_(2/3-x)TiO_3 SOLID ELECTROLYTE

作　　者：赵淑金[1] 张杨[1] 李国晶[1] 王涛[1] 

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007

出　　处：《硅酸盐学报》2010年第1期50-53,共4页Journal of The Chinese Ceramic Society

基　　金：黑龙江省自然科学基金(E2007-27);佳木斯大学重点项目(LZ2009-012)资助项目

摘　　要：用高温固相法合成了一系列不同组成的固体电解质Li3xLa2/3-xTiO3(LLTO,x=0.06,0.10,0.12,0.16,摩尔分数),研究了不同Li2O掺杂量对LLTO显微结构和电导率的影响。对样品进行X射线衍射和扫描电子显微镜分析,用交流阻抗技术测试其电导率。结果表明:LLTO为超结构的立方晶体,在LLTO(x=0.12)陶瓷中有Li0.485La0.505TiO3相产生;1150℃烧结的样品晶粒分布较均匀且大部分为球形,1250℃烧结的样品致密度较高,晶粒的形状均匀,为片状,x=0.06时,LLTO的电导率最大,其室温电导率为1.1×10-6S/cm。Li2O-doped Li3xLa2/3-xTiO3 （LLTO,x=0.06,0.10.0.12,0.16,mole fraction） solid electrolytes were prepared by a high temperature solid-state reaction method.The LLTO microstructure and conductivity of the samples sintered at 1150 ℃ and 1250 ℃ were analyzed by X-ray diffractometer and scanning electron microscope.The ionic conductivity was determined by alternating current impedance spectroscopy.The results show that LLTO has a superstructure.There exists Li0.485La0.505TiO3 phase in the LLTO obtained when x=0.12.The crystalline grains in the samples sintered at 1150℃ are spherical and uniform-sized.The sample sintered at 1250℃ has a higher density.The maximum conductivity of the LLTO is obtained when x=0.06 is 1.1×10^-6 S/cm at room temperature.

关 键 词：钛酸镧锂 固体电解质 离子电导率 

分 类 号：TM911.3[电气工程—电力电子与电力传动]