(中南大学 冶金科学与工程学院，长沙 410083)
摘 要: 以Ti(OC4H9)4、Li(CH3COO)·2H2O、Al(NO3)·9H2O和NH4H2PO4为原料，采用溶胶-凝胶法合成Li1.3Al0.3Ti1.7(PO4)3粉体，并研究热处理温度对粉体结构的影响。通过X射线衍射仪(XRD)、扫描电镜(SEM)和电化学阻抗谱(EIS)对制备粉体的结构与性能进行表征。结果表明：溶胶凝胶法可合成纯相LATP粉体，降低热处理温度，且粉体结晶性良好，粒径小于1 μm，室温下电导率为1.32×10-3 S/cm，673 K时电导率达到8.94×10-2 S/cm，473~673 K下活化能为31.55 kJ/mol。
关键字: 锂快离子导体；Li1.3Al0.3Ti1.7(PO4)3；离子电导率；溶胶-凝胶
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Li1.3Al0.3Ti1.7(PO4)3 powders were prepared by sol-gel method using Ti(OC4H9)4, Li(CH3COO)·2H2O, Al(NO3)·9 H2O and NH4H2PO4 as starting materials. The influence of synthesis temperature on the structure of Li1.3Al0.3Ti1.7(PO4)3 powders was studied. The structure and the characterization of the powders were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM)and electrochemical impedance spectroscopy (EIS). The results show that pure Li1.3Al0.3Ti1.7(PO4)3 powders with good crystallinity and particle size below 1 μm are obtained by sol-gel method, and the heating temperature decreases. The lithium ion conductivity is 1.32×10-3 S/cm at room temperature, while it reaches its maximum 8.94×10-2 S/cm at 673 K, and its activation energy is 31.55 kJ/mol at the temperature range of 473-673 K
Key words: lithium fast ion conductor; Li1.3Al0.3Ti1.7(PO4)3; ionic conductivity; sol-gel method
