锂快离子导体Li_(1+2x+2y)Al_xMg_yTi_(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+2y) Al_xMg_yTi_(2-x-y)Si_x P_(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》2001年第5期510-511,共2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LiTi2 (PO4 ) 3 为基以天然高岭石为起始原料 ,经高温固相反应 (～ 90 0℃ )制得了一系列新的锂快离子导体材料Li1+ 2x + 2yAlxMgyTi2 -x-ySixP3 -xO12 (以下简称Ti Mg Lisicon)。系统的合成温度随x和y值的增大而降低。应用交流阻抗技术测定的电导率数据结果表明x =0 .1,y =0 .1的合成物的室温电导率最好为 1.0 1× 10 -4 S/cm ,而 40 0℃时x =0 .1,y =0 .3的合成物的电导率最大 ,为 2 .5 3× 10 -2 S/cm。XRD分析结果表明在x =0 .1,y≤ 0 .8;x =0 .2 ,y≤ 0 .6的组成范围内均能得到空间群为R3-Refined natural kaolinite has been used as a starting material for preparing new lithium fast ion conductors Li 1+2 x+2y Al x Mg y Ti 2- x-y Si x P 3- x O 12 system by high temperature (～900℃) solid phase reaction for about 20h.The syntheses temperatures lower with increasing the value of x and y for the above system. X ray powder diffraction showed that a Lisicon phase with R3c space group exists in the composition range of x=0.1, y ≤0.8 and x=0.2, y ≤0.6. The composition with x=0.1, y =0.1 possesses maximum ionic conductivity of 1.01×10 -4 S/cm at room temperature, while at 673K the composition with x=0.1, y =0.3 possesses the best ionic conductivity of 2.53×10 -2 S/cm.

关 键 词：锂快离子导体 Ti-Mg-Lisicon 高岭石 

分 类 号：TM91[电气工程—电力电子与电力传动] TM24[一般工业技术—材料科学与工程]