锂快离子导体Li_(1+2x)Al_xTi_yGe_(2-x-y)Si_xP_(3-x)O_(12)系统的研究  

The study of new lithium fast ion conductors Li_(1+2x)Al_xTi_yGe_(2-x-y)Si_xP_(3-x)O_(12) system

作　　者：张玉荣[1] 王文继[1] 

机构地区：[1]福州大学化学系,福建福州350002

出　　处：《功能材料》2002年第2期178-179,182,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目 (59772 0 4 3)

摘　　要：以高岭石为起始原料 ,经高温固相反应 (～ 10 0 0℃ )合成了Li1+ 2xAlxTiyGe2 -x-ySixP3 -xO12 (以下简称Ti Ge Lisicon)系统的锂快离子导体。应用交流阻抗技术测定的电导率数据结果表明 ,y =1.5 ,x =0 .2的合成物的电导率最好 ,40 0℃时电导率达 2 .13× 10 -2 S/cm ,2 0 0～ 40 0℃内的电导激活能为 3 0 .6kJ/mol。XRD分析结果表明在一定的组成范围内得到空间群为R3 - c的合成物。New lithium fast ion conductors Li 1+2 x Al x Ti y Ge 2- x-y Si x P 3- x O 12 (referred to as Ti Ge Lisicon) was prepared by solid state reaction at about 1000℃ using kaolinite as a starting materials.X ray diffraction analysis shows that a lisicon phase with a space R3-c exists in a proper composition range. AC impedence measurements indicate that the composition with x =0.2, y =1.5 has the best ion conductivity of 2.13×10 -2 S/cm at 400℃,its activation energy is 30.6kJ/mol in the temperature range of 200～400℃.

关 键 词：锂快离子导体 Ti-Ge-Lisicon 高岭石 锂电池 

分 类 号：TM911.14[电气工程—电力电子与电力传动]