All-solid-state lithium-ion batteries (ASLBs) are regarded as the next generation of energy storage devices owing to their excellent safety. However, the performance of ASLBs has yet to reach that of currently commercialized liquid electrolyte-based lithium-ion batteries due to numerous problems, including the inferior ionic conductivities of solid electrolytes (SEs) and poor solid-solid interfacial contact between the SE and active material particles. Herein, dimensional control of SE particles using liquid-phase synthesis is demonstrated and its favorable impact on cell performance is investigated. Argyrodite Li₆PS₅Cl SE with high ionic conductivity of 1.54 mS cm⁻¹ and distinct 2D morphology was synthesized using 2D structured reduced graphene oxide as the template. The SE particles with a high aspect ratio improve the long-range connectivity of the SE within the composite electrode and provide a well-connected ionic transport pathway for charge-discharge. The electrochemical impedance spectroscopy analysis of the composite electrode using electron blocking cell configuration revealed a threefold enhancement of the effective ionic transport within the composite. As a result, superior rate performance was demonstrated with 2D SE composite electrodes at high C rates.

全固态锂离子电池（ASLB）由于其出色的安全性而被视为下一代储能设备。然而，由于许多问题，包括固体电解质 (SEs) 的离子电导率差以及 SE 与活性物质之间的固-固界面接触不良，ASLB 的性能尚未达到目前商业化的基于液体电解质的锂离子电池的性能。材料颗粒。在此，展示了使用液相合成对 SE 颗粒的尺寸控制，并研究了其对电池性能的有利影响。Argyrodite Li ₆ PS ₅ Cl SE 具有 1.54 mS cm ^{-1 的}高离子电导率并且使用二维结构的还原氧化石墨烯作为模板合成了独特的二维形态。具有高纵横比的 SE 颗粒改善了复合电极内 SE 的长程连通性，并为充放电提供了连接良好的离子传输途径。使用电子阻挡电池配置的复合电极的电化学阻抗谱分析揭示了复合材料内有效离子传输的三倍增强。因此，2D SE 复合电极在高 C 倍率下表现出优异的倍率性能。