Y^(3+),W^(6+)掺杂的矿物锂快离子导体Li_(1.2+x-y)Y_xTi_(1.9-x)Al_(0.1)Si_(0.1)W_yP_(2.9-y)O_(12)系统的合成与表征  

Synthesis and Characterization of Y^(3+),W^(6+)-Doped Mineral Lithium Fast Ion Conductor Li_(1.2+x-y)Y_xTi_(1.9-x)Al_(0.1)Si_(0.1)W_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：《中国稀土学报》2006年第4期452-455,共4页Journal of the Chinese Society of Rare Earths

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-yYxTi1.9-xAl0.1Si0.1WyP2.9-yO12(以下简称Y-W-Lisicon)。X射线粉末衍射分析结果表明,在x=0.10,y≤0.20及x=0.20,y≤0.20的组成范围内能得到空间群为R3c,类似于Nasicon的三方结构,但在上述组成范围内均有杂相存在。应用交流阻抗技术测定电导率的结果表明,起始组成为x=0.10,y=0.10的样品在室温下具有较高的离子电导率,为1.65×10-5S.cm-1;组成为x=0.20,y=0.10的样品在573 K时具有较高的离子电导率,为6.53×10-3S.cm-1,该样品的分解电压为3.0 V。New lithium fast ion conductors of Li1.2＋x-y YxTi1.9-X Al0.1Si0. 1WyP2.9- y O12 based on LiTi2 （ PO4 ）3 were prepared by high temperature solid state reaction using refined natural kaolinite as a starting material. X-ray powder diffraction analysis indicates that a phase with Nasicon-like structure exists together with other phases in the composition range of x = 0.1, y≤0.2 and x = 0.2, y≤ 0.2. AC impedance measure ments show that the initial composition with x = 0.10, y = 0.10 possesses the highest ionic conductivity of 1.65×10^-5 S·cm^-1 at room temperature, while the sample with initial composition of x = 0.20, y = 0.10 has the best ionic conductivity of 6.53×10^-3S·cm^-1 at 573 K and decomposes at 3.0 V.

关 键 词：矿物锂快离子导体 Y-W-Lisicon 高岭石 稀土 

分 类 号：O646.1[理学—物理化学]