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2~5μm,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.
@@@@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?5μm. 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℃.
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