To improve the Li ion conductivity in a glass-ceramic solid electrolyte, the microstructural control for Li₂S-P₂S₅ glass ceramics was investigated based on crystallization kinetics. 75Li₂S∙25P₂S₅ (mol.%) glass was synthesized by a ball-milling method, and glass-ceramics were prepared by crystallization with heat treatment at various temperatures with appropriate holding times. Crystallization kinetics—nucleation rate, I, and crystal growth rate, U, of 75Li₂S∙25P₂S₅ glass—were determined by differential thermal analysis and in situ transmission electron microscopy (TEM). The obtained parameters were referred to optimize the heat treatment conditions. Through the optimization, Li ion conductivity was improved by 80% in comparison with the glass electrolyte, in which a conductivity of 1.33 × 10⁻³ S cm⁻¹ was achieved at room temperature by controlling the microstructure and the formation of a network structure in the glass matrix. This approach brings out the best performance of 75Li₂S∙25P₂S₅ glass-ceramics. The effective medium theory was adopted to discuss the formation of a fast ion-conducting network for the improvement of Li ion conductivity. The present method can provide an effective preparation route of a glass-ceramic solid electrolyte for all-solid Li-ion batteries.

为了提高玻璃陶瓷固体电解质中的Li离子电导率，基于结晶动力学研究了Li ₂ S-P ₂ S ₅玻璃陶瓷的微结构控制。通过球磨法合成75Li ₂ S·25P ₂ S ₅（摩尔％）玻璃，并通过在适当的保持时间下在各种温度下进行热处理结晶化来制备玻璃陶瓷。结晶动力学-75Li ₂ S∙25P ₂ S ₅的成核速率I和晶体生长速率U玻璃-通过差热分析和原位透射电子显微镜（TEM）确定。参考获得的参数以优化热处理条件。通过优化，与玻璃电解质相比，Li离子电导率提高了80％，其中通过控制微结构和网状结构的形成，在室温下可获得1.33×10 ^-3  S cm ^-1的电导率。玻璃基质。这种方法可以发挥出75Li ₂ S∙25P ₂ S ₅的最佳性能玻璃陶瓷。采用有效介质理论讨论了快速离子导电网络的形成，以提高Li离子电导率。本方法可以为全固态锂离子电池提供一种玻璃陶瓷固态电解质的有效制备途径。