复合固态电解质，固态电池及其制备方法

本发明属于电池技术领域，尤其涉及一种复合固态电解质，包括：有机聚合物、锂盐、离子液体和无机固态电解质材料；其中，所述聚合物、所述锂盐、所述离子液体和所述无机固态电解质材料的质量比为1：(0.1～0.6)：(0.1～1)：(0.05～0.2)。本发明复合固态电解质的离子电导率高，稳定性高，和正负极相容性好，机械性能优异，其中，聚合物骨架使复合固态电解质具有优异的机械性能；锂盐为固态电解质提供锂离子；离子液体提高电解质的电导率；无机固态电解质材料可以与聚合物交联进一步提高固态电解质的机械性能，增加强度。

The invention belongs to the technical field of batteries, and particularly relates to a composite solid-state electrolyte which comprises an organic polymer, a lithium salt, an ionic liquid and an inorganic solid electrolyte material, wherein the mass ratio of the polymer to the lithium salt to the ionic liquid to the inorganic solid electrolyte material is 1: (0.1-0.6): (0.1-1): (0.05-0.2). Thecomposite solid-state electrolyte disclosed by the invention is high in ionic conductivity, high in stability, good in compatibility with positive and negative electrodes and excellent in mechanical property, and the composite solid-state electrolyte has excellent mechanical property due to a polymer framework; the lithium salt provides lithium ions for the solid electrolyte; the ionic liquid improves the conductivity of the electrolyte; the inorganic solid electrolyte material can be crosslinked with the polymer to further improve the mechanical properties of the solid electrolyte and increase the strength.