Preparation equipment and preparation method of solid electrolyte membrane

Abstract

The invention discloses preparation equipment and a preparation method of a solid electrolyte membrane. The preparation equipment of the solid electrolyte membrane comprises a plurality of rotary spray heads and a baking device, the rotary spray heads pressurize solid electrolyte and then spray the solid electrolyte on a base material, the baking device dries the base material sprayed with the solid electrolyte, and thus the solid electrolyte membrane is formed. The rotary spray heads adopt a rotary spraying process to pressurize solid electrolyte and then spray the solid electrolyte on the base material, and the solid electrolyte can be effectively, uniformly and controllably coated on the base material, so that the solid electrolyte membrane based on the base material is efficiently andstably prepared, and the process problem of large-scale preparation of the solid electrolyte membrane can be effectively solved based on the scheme; the base material plays a role in supporting a framework in the solid electrolyte membrane, so that the mechanical strength of the prepared solid electrolyte membrane is remarkably improved, the performance is excellent, and subsequent battery cell assembly is facilitated; and the membrane thickness of the solid electrolyte membrane is precisely controllable.

Description

technical field [0001] The invention relates to the field of all-solid-state lithium-ion batteries, in particular to a preparation device and a preparation method for a solid-state electrolyte membrane of an all-solid-state lithium-ion battery. Background technique [0002] At present, the electrolyte used in commercial lithium-ion secondary batteries is mainly organic liquid electrolyte, which has potential safety hazards such as flammability, explosion, and leakage. All-solid-state lithium-ion batteries are an important way for the industry to solve the safety problems of lithium-ion batteries. All-solid-state lithium-ion batteries not only inherit the advantages of traditional liquid lithium-ion batteries, such as high working voltage, high specific energy, long cycle life, and clean and pollution-free, but also can solve the problems of leakage and flammability, and improve battery safety performance. As an important part of all-solid-state lithium-ion batteries, solid-s...

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Problems solved by technology

At present, solid-state electrolytes are mostly concentrated in sulfide, oxide, and polymer materials. The solid-state electrolyte membranes based on the above materials are mainly independent self-supporting membranes. Self-supporting solid-state electrolyte membranes are prepared by dipping, coating, and other methods, namely By coating the solid electrolyte on the back material, and then peeling the solid electrolyte from the back material, a self-supporting solid electrolyte film is formed. Since the back material used in this method cannot be recycled, the cost of the method is high, and The complex process has high technical requirements for equipment, and the overall hardware investment is also high, which is not conducive to industrial promotion and use; there are also problems such as high difficulty in batch processing and low strength of the prepared solid electrolyte membrane

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