There has been considerable interest in lithium-sulfide glasses with high lithium ion conductivities because of their potential applications in solid-state electrolytes. Here, new sulfide glasses containing alkaline earth cations, Li₂S–P₂S₅–MS (M = Ca, Sr, Ba), were synthesized by melt quenching. Furthermore, the glass-forming regions in these glasses were identified.

Three samples containing equimolar alkaline earth cations (60Li₂S–30P₂S₅–10MS) were selected and their ${\mathrm{Li}}^{+}$ conductivities were measured. Lower ${\mathrm{Li}}^{+}$ conductivities were observed in 60Li₂S–30P₂S₅–10MS than in Li₂S–P₂S₅. The local structures of P and Li were characterized by ³¹P and ⁶Li solid-state magic angle spinning (MAS) NMR to determine the cause for the observed decrease in the ${\mathrm{Li}}^{+}$ conductivities and understand the role of alkaline earth cations in the Li₂S–P₂S₅ glasses. A higher-field shift of the ${\mathrm{PS}}_4^{3-}$ was observed in the ³¹P MAS NMR spectra of the glasses containing alkaline earth cations, which was attributed to the formation of bridging structures between ${\mathrm{PS}}_4^{3-}$ units by alkaline earth cations. Moreover, more than half of the Li had low mobility, which is consistent with the conductivity. These results highlight the presence of an effective conduction path around the ${\mathrm{PS}}_4^{3-}$ in contrast to ${\mathrm{P}}_2{\mathrm{S}}_7^{4-}$ and ${\mathrm{P}}_2{\mathrm{S}}_6^{4-}$.

由于其在固态电解质中的潜在应用，人们对具有高锂离子传导性的硫化锂玻璃有相当大的兴趣。在这里，通过熔融淬火合成了含有碱土金属阳离子Li ₂ S–P ₂ S ₅ –MS（M = Ca，Sr，Ba）的新型硫化物玻璃。此外，确定了这些玻璃中的玻璃形成区域。

选择了三个含有等摩尔碱土金属阳离子（60Li ₂ S–30P ₂ S ₅ –10MS）的样品，${\mathrm{里}}^{+}$测量电导率。降低${\mathrm{里}}^{+}$在60Li ₂ S–30P ₂ S ₅ –10MS中观察到电导率比在Li ₂ S–P ₂ S ₅中观察到。通过³¹ P和⁶ Li固态幻角旋转（MAS）NMR表征P和Li的局部结构，以确定观察到的P和Li降低的原因。${\mathrm{里}}^{+}$导电性并了解碱土金属阳离子在Li ₂ S–P ₂ S ₅玻璃中的作用。高场移${\mathrm{聚苯乙烯}}_4^{3-}$在含有碱土金属阳离子的玻璃的³¹ P MAS NMR光谱中观察到这种现象，这归因于在${\mathrm{聚苯乙烯}}_4^{3-}$单位由碱土金属阳离子组成。而且，超过一半的Li具有低迁移率，这与电导率一致。这些结果突显了在周围存在有效的传导路径。${\mathrm{聚苯乙烯}}_4^{3-}$ 与 ${\mathrm{P}}_2{\mathrm{小号}}_7^{4-}$ 和 ${\mathrm{P}}_2{\mathrm{小号}}_6^{4-}$。