A film-forming method for a polymer-based solid electrolyte

A technology of solid electrolyte and film-forming method, applied in circuits, fuel cells, electrical components, etc., can solve the problems of exposed polymer film skeleton, uneven distribution of fillers, poor structural uniformity, etc., to achieve good compositional uniformity and easy continuous. The effect of high production and production efficiency
CN109167090BActive Publication Date: 2021-10-15CHANGSHA RES INST OF MINING & METALLURGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGSHA RES INST OF MINING & METALLURGY
Publication Date
2021-10-15

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Abstract

The invention discloses a method for forming a film of a polymer-based solid electrolyte, which comprises the following steps: (1) adding lithium salt and a polymer into a polar solvent, stirring evenly to form a film with a viscosity of 0.1Pa·s to 10Pa·s uniform slurry; (2) scrape or spray the slurry on the rigid substrate to form a layer of wet film, and then cover the porous framework material on the surface of the wet film; (3) uniformly coat the slurry on the porous framework material A layer of wet film is formed on the surface, and then dried to form a polymer-based solid electrolyte membrane. In the film-forming method of the present invention, by coating the film twice, the polymer slurry can be well adsorbed on the inside and surface of the porous skeleton material to achieve the effect of sufficient wetting, which is conducive to the discharge of air bubbles. After drying, it forms smooth, A polymer solid electrolyte membrane with a uniform structure and no internal defects ensures the ionic conductivity and tensile strength of the polymer-based solid electrolyte.
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Description

technical field

[0001] The invention belongs to the technical field of lithium ion battery preparation, and in particular relates to a polymer-based solid electrolyte film-forming process. Background technique

[0002] Solid-state batteries are one of the hottest technical routes in current lithium battery technology, and one of the difficulties affecting the industrialization of solid-state batteries lies in the industrialization process of solid-state electrolyte membranes. At present, the preparation technology of polymer electrolyte membrane is still mainly carried out by liquid phase methods such as pouring and casting, which must have a substrate as a supporting layer for the liquid slurry. In the traditional substrate, the polymer film is prepared by a one-time film-forming method, because the pores generated by the liquid-solid tension two phases on the substrate side cannot be completely wetted, or the bubbles generated in the bottom layer during the solvent volatil...

Claims

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