Abstract Perovskite-type Li3x-yLa1-xAl1-yTiyO3 (x = 5y/12) solid electrolytes with varying Ti content (y = 0.4, 0.6, 0.8, 0.9, and 1) were prepared by conventional solid-state reaction process. Furthermore, the crystal structure, Li-ion conductivity, and electrochemical stability were investigated by X-ray diffraction, alternating current impedance, and cyclic voltammetry. X-ray diffraction analysis showed minimum impurities and a change from cubic to tetragonal with increasing Ti content. Maximum bulk and total conductivities of 1.99 × 10–3 S cm–1 and 4.53 × 10–4 S cm–1 were obtained in Li0.25La0.583TiO3, with activation energy of 0.28 eV and electronic conductivity of 2.30 × 10–9 S cm–1 at 20 °C. Cyclic voltammetry showed that Al-contained materials such as Li0.2La0.667Al0.2Ti0.8O3, and Li0.225La0.625Al0.1Ti0.9O3 were slightly more stable than Li0.25La0.583TiO3 vs. Li+/ Li. LiFePO4/Li batteries were fabricated using Li0.225La0.625Al0.1Ti0.9O3, and Li0.25La0.583TiO3 as solid electrolyte separators, a capacity of 79.0, and 112.0 mA h g–1 at 25 °C were maintained over 100 cycles, respectively.

中文翻译：

---

A位缺陷钙钛矿结构Li3x-yLa1-xAl1-yTiyO3电解质的锂离子电导率和电化学稳定性

摘要 通过常规固相反应工艺制备了具有不同 Ti 含量（y = 0.4、0.6、0.8、0.9 和 1）的钙钛矿型 Li3x-yLa1-xAl1-yTiyO3 (x = 5y/12) 固体电解质。此外，通过X射线衍射、交流阻抗和循环伏安法研究了晶体结构、锂离子电导率和电化学稳定性。X 射线衍射分析显示杂质最少，并且随着 Ti 含量的增加，从立方体变为四方体。在 Li0.25La0.583TiO3 中获得的最大体积和总电导率为 1.99 × 10-3 S cm-1 和 4.53 × 10-4 S cm-1，活化能为 0.28 eV，电子电导率为 2.30 × 10-9 S cm–1 在 20 °C。循环伏安法表明，含铝材料如 Li0.2La0.667Al0.2Ti0.8O3 和 Li0.225La0.625Al0.1Ti0。9O3 比 Li0.25La0.583TiO3 相对于 Li+/Li 稍微更稳定。使用 Li0.225La0.625Al0.1Ti0.9O3 和 Li0.25La0.583TiO3 作为固体电解质隔膜制造 LiFePO4/Li 电池，在 25°C 下的容量分别为 79.0 和 112.0 mA hg-1，并保持 100 次循环.