Polymer solid electrolyte membrane and preparation method thereof

The invention relates to the technical field of lithium ion batteries, in particular to a polymer solid electrolyte membrane and a preparation method thereof. The polymer solid electrolyte membrane comprises a polymer network and a lithium salt, wherein the polymer network is formed by polymerizing 1, 5-naphthalene diisocyanate and amino-terminated PEO, and the lithium salt is dispersed in the polymer network. The polymer solid electrolyte membrane disclosed by the invention is high in strength and thin in thickness, can better meet the requirements of a solid-state lithium battery, is simple in preparation process and convenient for large-scale production, and has a good application prospect. 本发明涉及锂离子电池技术领域，尤其涉及一种聚合物固态电解质膜及其制备方法。聚合物固态电解质膜包括由1,5-萘二异氰酸酯和胺基封端PEO聚合而成的聚合物网络和分散在所述聚合物网络中的锂盐。本发明一种聚合物固态电解质膜强度高、厚度薄，能更好地满足固态锂电池的需求，且制备工艺简单，便于规模化生产，具有良好的应用前景。