Composite solid electrolyte and preparation method thereof, solid-state battery and electric equipment

• Main Authors: SHI LIURONG, LYU SHUN
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a composite solid electrolyte and a preparation method thereof, a solid-state battery and electric equipment, and belongs to the technical field of solid-state battery manufacturing. The composite solid electrolyte comprises a polymer nanofiber membrane and a filler, wherein the polymer nanofiber membrane is of a porous structure; the filler comprises a polydopamine-coated inorganic electrolyte, a polymer electrolyte and a lithium salt which are mixed, the filler is filled in the porous structure, the composite solid electrolyte has the advantage of relatively high ionic conductivity, and correspondingly, the battery corresponding to the composite solid electrolyte has relatively excellent cycle performance and rate capability. 本申请提供一种复合固态电解质及其制备方法、固态电池以及用电设备，属于固态电池制造技术领域。复合固态电解质包括聚合物纳米纤维膜以及填充物，聚合物纳米纤维膜为多孔结构；填充物包括混合的聚多巴胺包覆的无机电解质、聚合物电解质和锂盐，填充物填充于多孔结构内，该复合固态电解质具有离子电导率较高的优势，相应地，其对应的电池具有较为优异的循环性能和倍率性能。