Preparation method of three-dimensional network quasi-solid polymer electrolyte membrane and product and application thereof

The invention discloses a preparation method of a three-dimensional network quasi-solid polymer electrolyte membrane as well as a product and application of the three-dimensional network quasi-solid polymer electrolyte membrane, and belongs to the technical field of electrolyte. The preparation method comprises the following steps: providing an allyl functionalized covalent organic framework material, and dispersing the allyl functionalized covalent organic framework material, pentaerythritol tetra-3-mercaptopropionate, ethoxylated trimethylolpropane triacrylate and a photoinitiator in an organic solvent to prepare a precursor solution; and putting a mixed solution of the precursor solution, a lithium salt and a linear polymer in an inert atmosphere to carry out photocuring film formation, and carrying out vacuum drying on an intermediate film product to obtain the three-dimensional network quasi-solid polymer electrolyte film. According to the preparation method disclosed by the invention, the prepared three