锂离子电池由于能量密度大、工作电压高等优点，成为现代高性能电池的代表，具有很好的开发前景。而电解质作为其重要组成部分，是重点的研究对象之一。本研究针对聚丙烯腈（PAN）基凝胶聚合物电解质，通过添加填料的方式尝试对其改性。其中，惰性填料选择SiO₂，活性填料选择Li₇La₃Zr_1.4Ta_0.6O₁₂（LLZTO），并使用双（三氟甲磺酰）亚胺锂（LiTFSI）作为锂盐，四乙二醇二甲醚（G4）离子液体作为增塑剂。实验探究了不同配比含量的填料对电解质性能的影响。通过离子电导率等电化学测试方法，对实验变量与电解质性能之间的内在关联进行充分分析后，发现了随着SiO₂含量上升，电解质的膜孔隙率、电解液吸收量和离子电导率都有所上升，而LLZTO填料需要精准控制浓度等结论。并通过X射线衍射（XRD）和场发射扫描电子显微镜（SEM）对其结构组成进行了表征。本研究系统分析了制备过程中上述各变量因素与电解质电化学性能之间的内在关联，对进一步开发高性能聚合物电解质提供了指引，推动了高容量密度全固态电池的产业化。

Lithium-ion battery has become the representative of modern high-performance battery due to its high energy density and high working voltage, and has a good development prospect. Electrolyte, as an important component, is one of the key research objects. In this study, PAN-based gel polymer electrolyte was modified by adding filler. Among them, the inert filler selected SiO₂, the active filler selected LLZTO, LiTFSI as lithium salt, G4 ionic liquid as plasticizer. The effects of different proportions of fillers on the properties of electrolytes were investigated. Through electrochemical testing methods such as ionic conductivity, the internal correlation between experimental variables and electrolyte performance was fully analyzed, and it was found that with the increase of SiO₂ content, the membrane porosity, electrolyte absorption and ionic conductivity of the electrolyte all increased, and LLZTO packing requires precise control of concentration and other conclusions. Its structure and composition were characterized by XRD and SEM. This study systematically analyzed the internal relationship between various variables in the preparation process and electrochemical performance of electrolytes, which provided guidance for further development of high performance polymer electrolytes and promoted the industrialization of high volume density all-solid-state batteries.