Water-based solid electrolyte slurry, solid electrolyte diaphragm and secondary battery

The invention relates to the technical field of secondary batteries, in particular to aqueous solid electrolyte slurry, a solid electrolyte diaphragm and a secondary battery. The water-based solid electrolyte slurry comprises a solid electrolyte, a water-based adhesive thickener, a phthalocyanine salt material, a silicate material, a wetting agent and water, the mass ratio of the solid electrolyte to the water-based adhesive thickening agent to the phthalocyanine salt material to the silicate material to the wetting agent is (90-110): (3-10): (0.01-0.05): (0.01-0.02): (0.05-0.15). By compounding the phthalocyanine salt material and the silicate material, the phthalocyanine salt material and the silicate material can be matched with other components to play a good role, and the structural stability of the solid electrolyte material in an aqueous solution is protected from a formula level, so that the structural stability of the solid electrolyte in slurry is guaranteed, and the ionic conductivity performance l