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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
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)
