(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 采用噴霧干燥法合成Li1.3Al0.3Ti1.7(PO4)3的前驅(qū)體，將所得前驅(qū)體在不同溫度下焙燒得到鋰離子固態(tài)電解質(zhì)Li1.3Al0.3Ti1.7(PO4)3，研究固化劑PEG-6000對(duì)合成過(guò)程的影響。通過(guò)X射線衍射(XRD)、掃描電鏡(SEM)、熱重分析(TG-DTA)和傅里葉變換紅外光譜(FTIR)對(duì)合成樣品進(jìn)行表征。結(jié)果表明：噴霧干燥法得到的前驅(qū)體均為球型顆粒，粒度為2~5 μm，添加固化劑的前驅(qū)體顆粒更細(xì)；固化劑降低前驅(qū)體合成純相Li1.3Al0.3Ti1.7(PO4)3的焙燒溫度；無(wú)固化劑的前驅(qū)體在800 ℃下焙燒得到純相Li1.3Al0.3Ti1.7(PO4)3；添加固化劑的前驅(qū)體在700 ℃下得到純相Li1.3Al0.3Ti1.7(PO4)3。
關(guān)鍵字: Li1.3Al0.3Ti1.7(PO4)3；快離子導(dǎo)體；噴霧干燥法
（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
