Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第23卷    第2期    总第167期    2013年2月

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文章编号:1004-0609(2013)02-0463-06
固化剂对喷雾干燥-焙烧法制备快离子导体Li1.3Al0.3Ti1.7(PO4)3的影响
杨  波,李新海,郭华军,王志兴,吴飞翔

(中南大学 冶金科学与工程学院,长沙 410083)

摘 要: 采用喷雾干燥法合成Li1.3Al0.3Ti1.7(PO4)3的前驱体,将所得前驱体在不同温度下焙烧得到锂离子固态电解质Li1.3Al0.3Ti1.7(PO4)3,研究固化剂PEG-6000对合成过程的影响。通过X射线衍射(XRD)、扫描电镜(SEM)、热重分析(TG-DTA)和傅里叶变换红外光谱(FTIR)对合成样品进行表征。结果表明:喷雾干燥法得到的前驱体均为球型颗粒,粒度为2~5 μm,添加固化剂的前驱体颗粒更细;固化剂降低前驱体合成纯相Li1.3Al0.3Ti1.7(PO4)3的焙烧温度;无固化剂的前驱体在800 ℃下焙烧得到纯相Li1.3Al0.3Ti1.7(PO4)3;添加固化剂的前驱体在700 ℃下得到纯相Li1.3Al0.3Ti1.7(PO4)3

 

关键字: Li1.3Al0.3Ti1.7(PO4)3;快离子导体;喷雾干燥法

Effect of solidifying agent on preparation of Li1.3Al0.3Ti1.7(PO4)3 by spray-drying and post-calcining method
YANG Bo, LI Xin-hai, GUO Hua-jun, WANG Zhi-xing, WU fei-xiang

School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

Abstract:The solid state electrolyte Li1.3Al0.3Ti1.7(PO4)3 was prepared by post-calcining the precursors obtained through spray-drying method. The effect of PEG-6000 addition on the microstructure and calcination temperature of Li1.3Al0.3Ti1.7(PO4)3 was studied. The prepared samples were characterized by X-ray powder diffraction, scanning electron microscopy, thermogravimetric analysis and differential thermal analysis and Fourier transform infrared spectroscopy. The results show that the precursors obtained by spray-drying are spherical particles with the average size of 2-5 μm. With the addition of PEG-6000, the decomposition and crystallinity temperature decrease, the particle sizes of the powders become smaller. The precursors without PEG-6000 calcined at 800 ℃ are well crystallized while the precursors with PEG-6000 are also well crystallized at only 700 ℃.

 

Key words: Li1.3Al0.3Ti1.7(PO4)3; fast ionic conductor; spray-drying

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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