【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。更多还原

【Abstract】 New lithium fast ion conductors of Li_1.2+x-yY_xTi_1.9-xAl_0.1Si_0.1W_yP_2.9-yO₁₂ 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 measurements show that the initial composition with x=0.10,y=0.10 possesses the highest ionic conductivity of 1.65×10^-5 S·cm¹ 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^-3(S·cm^-1) at 573 K and decomposes at 3.0 V.更多还原