In this work, we prepared an iodine-doped Li₃PS₄ solid electrolyte by wet ball milling. We added pure iodine to the Li₃PS₄ solid electrolyte to achieve a novel composite/phase. We optimized the highest ionic conductivity of the composite by changing the iodine concentration and sintering temperature. The selected Li₆P₂S₈I solid electrolyte exhibited the ionic conductivity of 1 × 10^-3 S cm⁻¹, at room temperature. We used high-power X-ray diffraction to analyse the crystalline nature and find the formation of a new, unknown phase. We studied the surface morphology of the electrolyte by field-emission microscopy. We analysed the surface functional group of the Li₆P₂S₈I solid electrolyte by X-ray photoelectron spectroscopy and its electrochemical behaviour by cyclic voltammetry, DC polarization, charge–discharge and impedance spectroscopy. The cyclic voltammetry and DC polarization showed that the synthesized Li₆P₂S₈I solid electrolyte is highly stable to Li. The fabricated In/ Li₆P₂S₈I /NCM composite 2032-type asymmetric cell exhibited the specific capacity of 135.1 mAh g⁻¹ and showed good cycle stability.

在这项工作中，我们通过湿式球磨制备了碘掺杂的Li ₃ PS ₄固体电解质。我们向Li ₃ PS ₄固体电解质中添加了纯碘，以实现新型的复合物/相。我们通过改变碘浓度和烧结温度来优化复合材料的最高离子电导率。所选的Li ₆ P ₂ S ₈ I固体电解质的离子电导率为1×10 ^-3 S cm ^-1， 在室温下。我们使用高功率X射线衍射来分析晶体性质，并发现新的未知相的形成。我们通过场发射显微镜研究了电解质的表面形态。我们通过X射线光电子能谱分析了Li ₆ P ₂ S ₈ I固体电解质的表面官能团，并通过循环伏安法，DC极化，充放电和阻抗谱分析了其电化学行为。循环伏安法和直流极化显示合成的Li ₆ P ₂ S ₈ I固体电解质对Li高度稳定。制成的In / Li ₆ P ₂ S ₈I / NCM复合2032型不对称电池的比容量为135.1 mAh g ^-1，并且具有良好的循环稳定性。