Al^(3+)、S^(6+)掺杂的矿物锂快离子导体Li_(1.2+x-y)Al_(0.1+x)Ti_(1.9-x)Si_(0.1)S_yP_(2.9-y)O_(12)系统的合成与表征  

The synthesis and characterization of Al^(3+),S^(6+)-doped mineral lithium fast ion conductors Li_(1.2+x-y)Al_(0.1+x)Ti_(1.9-x)Si_(0.1)S_yP_(2.9-y)O_(12) system

作　　者：张玉荣[1] 陈宇[1] 

机构地区：[1]福州大学化学化工学院,福建福州350002

出　　处：《功能材料》2006年第10期1596-1598,1602,共4页Journal of Functional Materials

基　　金：福建省青年人才科技创新专项基金资助项目(2001J019);福州大学科技发展基金资助项目(2003-XQ-06)

摘　　要：以LiTi2(PO4)3为母体,以天然高岭石为起始原料,经高温固相反应制得了一系列新的锂快离子导体Li1.2+x-yAl0.1+xTi1.9-xSi0.1SyP2.9-yO12(以下简称Al-S-Lisicon)。X射线粉末衍射分析结果表明在x≤0.30,y<0.2+x的组成范围内均能得到类似于Nasi-con三方结构的相。应用交流阻抗技术测定电导率的结果表明起始组成为x=0.20,y=0.20的合成物电导率最高,室温下为6.01×10-5S/cm,573K时达1.11×10-2S/cm,其在373~573K间的活化能为28.6kJ/mol,分解电压为3.1V。New lithium fast ion conductors of Li1.2＋x-yAl0.1＋xTi1.9-xSi0.1SyP2.9-yO12 based on LiTi2 （PO4）3 have been prepared by high temperature solid state reaction using refined natural kaolinite as a starting material. Xray powder diffraction analysis indicates that a phase with Nasicon-like structure exists in the composition range of x≤0.30, y〈0.2＋x. AC impedance measurements show that the initial composition with x=0.20, y=0.20 possesses the highest ionic conductivities of 6.01×10^5S/cm at room temperature and 1.11×10^-2S/cm at 573K with activation energy of 28. 6kJ/mol in the temperature range of 373 - 573K, DC polarizing measurement shows that its decomposing voltage is 3.1V.

关 键 词：矿物锂快离子导体 Al-S-Lisicon 高岭石 

分 类 号：O646.1[理学—物理化学]