Li₇La₃Zr₂O₁₂ is a promising material used as solid electrolyte in all-solid-state lithium batteries. However, the lithium ionic conductivity of LLZO is limited, and the cycling stability of lithium symmetric battery based on LLZO is not good. In this research, different Ga-doped LLZO samples were prepared by adding different excess amounts of Li₂O, and the effect of excess amount of Li₂O on the structure and performance of LLZO have been researched. The results show that with the rise of the amount of Li₂O, the lithium ionic concentration increases gradually, and the lithium ionic conductivity and the ratio of grain resistance to total resistance rise first and then drop. When the excess amount of Li₂O is 10 wt.%, the sample exhibits the highest lithium ionic conductivity of 1.36 mS/cm, and the lithium symmetric battery exhibits the most stable operation.

中文翻译：

---

Li6.4Ga0.2La3Zr2O12电解液中Li2O过量对全固态锂离子电池的影响

Li ₇ La ₃ Zr ₂ O ₁₂是一种很有前途的材料，可用作全固态锂电池中的固体电解质。然而，LLZO的锂离子电导率有限，基于LLZO的锂对称电池循环稳定性不佳。本研究通过加入不同过量的Li ₂ O制备不同Ga掺杂的LLZO样品，研究过量的Li ₂ O对LLZO结构和性能的影响。结果表明，随着 Li _{2量的增加}O，锂离子浓度逐渐增加，锂离子电导率和晶粒电阻占总电阻的比值先上升后下降。_{当Li 2} O过量为10 wt.%时，样品表现出最高的锂离子电导率1.36 mS/cm，锂对称电池表现出最稳定的运行。