Li_2-3xAl_xS (0 ≤ x ≤ 0.1667) was prepared via the planetary ball-milling method. Diffuse reflection UV-Vis measurements revealed that the band gap and electronic structure of Li₂S changed with the formation of defective Li_2-3xAl_xS. Compared with x = 0, the ionic conductivity for the sample with x = 0.1334 improved by ∼3 orders of magnitude. The lithium movement activation energy and pre-exponential factor A were found to be dependent on the x value. Compared with Li₂S, a ∼10-fold improvement in the electronic conductivity was realized with the addition of Al₂S₃. Additionally, the all-solid-state Li-S battery cell performance also displayed an enhancement in both the initial capacity and stability for sample x = 0.1667 compared with x = 0. This study highlighted the importance of the intrinsic electronic conductivity of the active materials (but not the electrode) on the performance of the all-solid-state Li-S battery.

Li _2-3x Al _x S（0≤X≤0.1667）是通过行星球磨法制备的。漫反射UV-Vis测量表明，Li ₂ S的带隙和电子结构随缺陷Li _2-3x Al _x S的形成而变化。X = 0时，样品的离子电导率 X= 0.1334提高了约3个数量级。发现锂运动活化能和指数前因子A取决于X值。与Li ₂ S相比，添加Al ₂ S ₃可使电子传导率提高约10倍。此外，全固态Li-S电池的性能还显示出样品的初始容量和稳定性都有所提高X = 0.1667与 X =0。这项研究强调了活性材料（而非电极）固有的电子电导率对全固态Li-S电池性能的重要性。