Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3的溶胶凝胶法制备及其性质研究  

Preparation and characterization of Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3 prepared by sol-gel

作　　者：吴显明[1] 肖卓炳[1] 麻明友[1] 何则强[1] 许名飞[2] 李新海[2] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《功能材料》2005年第5期701-703,共3页Journal of Functional Materials

摘　　要：采用溶胶凝胶法及固相反应法合成锂离子固体电解质Li1.3Al0.3Ti1.7(PO4)3,用X射线衍射检测合成产物的物相,用循环伏安及交流阻抗技术测试产物的电化学窗口及离子电导率等电化学性质。研究表明溶胶凝胶法合成的Li1.3Al0.3Ti1.7(PO4)3的电化学窗口为2.4V。与固相反应法相比,溶胶凝胶法合成的Li1.3Al0.3Ti1.7(PO4)3具有更好的结晶性,其烧结片具有较高的离子电导率和较小的活化能。Li1.3Al0.3Ti1.7 (PO4)3 solid electrolyte was prepared by sol-gel method using Li(CH3COO) &middot 2H2O, Al(NO3)3 &middot 9H2O, CH3OCH2CH2OH, PO(OC4H9)4 and (Ti(OC4H9)4) as starting materials. The phase identification of the synthesized powder was studied by X-ray diffraction. Electrochemical window and ionic conductivity were measured by cyclic voltagram and AC. impedance. The results show that Li1.3Al0.3Ti1.7 (PO4)3 prepared by sol-gel has better crystallinity than that prepared by solid state reaction. The electrochemical window of Li1.3Al0.3Ti1.7 (PO4)3 derived from sol-gel was beyond 2.4 V. The ionic conductivity of the sintered pellet prepared by sol-gel was higher than that prepared by solid-state reaction, while its activation energy was a bit smaller than that prepared by the latter.

关 键 词：固体电解质 溶胶-凝胶 电化学窗口 离子电导率 

分 类 号：O646[理学—物理化学]