锂离子固体电解质Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3的合成与表征

Synthesis and Characterization of Li-ion Solid-state Electrolyte Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3

以固相法合成锂离子固体电解质Li1.3Al0.3Ti1.7(PO4)3(以下简称LATP)。研究了合成温度以及烧结时间对其离子电导率的影响。采用X射线衍射、扫描电子显微镜和交流阻抗技术对合成材料的物相、形貌和离子导电性进行表征。结果表明:900℃条件下合成了纯相LATP,颗粒大小均匀,900℃下烧结4 h,得到的烧结片致密,离子电导率达3.07×10-4S/cm。

The Li-ion solid-state electrolyte Li1. 3Al0. 3Ti1. 7（PO4）3（LATP） was prepared by solid state reaction. The effects of resultant temperature and sintered time on the ionic conductivities of LATP pellet were studied. The phases and features of the prepared materials were investigated by X-ray diffraction and scanning electron microscope. The ionic conductivities were measured by AC impedance spectra. The results show that the LATP prepared at 900 ℃ is pure phase and the size of particles is uniformity.Among the LATP substrates,the one sintered at 900 ℃ for 4 h shows the highest compact and the highest ionic conductivity of 3. 07 × 10- 4S /cm.