KR-20260063212-A - ELASTIC SHEET FOR ALL-SOLID-STATE BATTERY, METHOD OF MANUFACTURING THE SAME AND ALL-SOLID-STATE BATTERY USING THE SAME

Abstract

The present invention relates to an elastic sheet for an all-solid-state battery, and more specifically, may comprise a support layer having a porous structure including a plurality of pores; and a polymer resin and a flame retardant additive within the support layer. The flame retardant additive may include phosphorus (P), and the pores of the support layer may include empty spaces capable of accommodating the polymer resin and the flame retardant additive.

Inventors

• 우창희
• 조익환
• 유지완
• 강영훈
• 류영균
• 김홍정

Assignees

• 삼성에스디아이 주식회사

Dates

Publication Date

20260507

Application Date

20241030

Claims (20)

1. A support layer having a porous structure including multiple pores; The above support layer includes a polymer resin and a flame retardant additive, wherein The above flame retardant additive contains phosphorus (P), and The pores of the support layer include empty spaces capable of accommodating the polymer resin and the flame retardant additive. Elastic sheet for all-solid-state batteries.
2. In Article 1, The flame retardant additive comprises phosphate, phosphite, phosphonate, phosphinate, phosphine oxide, or a combination thereof. Elastic sheet for all-solid-state batteries.
3. In Article 1, The above polymer resin comprises at least one of acrylic, urethane, and silicone-based resins, Elastic sheet for all-solid-state batteries.
4. In Article 1, The above support layer is in the form of melamine foam containing melamine resin, Elastic sheet for all-solid-state batteries.
5. In Article 1, Characterized by an impact absorption rate of 30% or more based on a falling ball impact test, Elastic sheet for all-solid-state batteries.
6. In Article 1, The above polymer resin comprises a UV-curable polymer, Elastic sheet for all-solid-state batteries.
7. In Article 1, The weight ratio of the flame retardant additive relative to the polymer resin is 20% by weight or more and 45% by weight or less, Elastic sheet for all-solid-state batteries.
8. In Article 1, The thickness of the above support layer is 0.1 mm to 3 mm, Elastic sheet for all-solid-state batteries.
9. A step of providing a support layer having a porous structure; A step of impregnating the support layer in a polymer precursor solution; and The method includes the step of curing the above polymer precursor solution, The polymer precursor solution comprises at least one precursor among a monomer and a prepolymer, and a flame retardant additive, and The weight ratio of the flame retardant additive to the precursor is 20% to 45% by weight, Method for manufacturing an elastic sheet for all-solid-state batteries.
10. In Article 9, The above support layer includes a plurality of pores, and The above impregnation step comprises filling the interior of the pores of the support layer with the polymer precursor solution. Method for manufacturing an elastic sheet for all-solid-state batteries.
11. In Article 10, The above support layer is in the form of melamine foam containing melamine resin, Method for manufacturing an elastic sheet for all-solid-state batteries.
12. In Article 9, The above precursor comprises at least one of acrylic, urethane, and silicone-based monomers and prepolymers, and The above curing step includes irradiating the polymer precursor solution with ultraviolet light. Method for manufacturing an elastic sheet for all-solid-state batteries.
13. In Article 9, The flame retardant additive comprises phosphate, phosphite, phosphonate, phosphinate, phosphine oxide, or a combination thereof. Method for manufacturing an elastic sheet for all-solid-state batteries.
14. In Article 9, The above-mentioned elastic sheet for a solid-state battery has an impact absorption rate of 30% or more in a drop ball impact test, Method for manufacturing an elastic sheet for all-solid-state batteries.
15. In Paragraph 14, The density of the above support layer is 0.1 g/cc to 0.5 g/cc, Method for manufacturing an elastic sheet for all-solid-state batteries.
16. In Article 9, The compression recovery rate of the elastic sheet for the all-solid-state battery above is 75% or more at a pressure of 2 MPa, Method for manufacturing an elastic sheet for all-solid-state batteries.
17. In Article 9, The thickness of the above support layer is 0.1 mm to 3 mm, Method for manufacturing an elastic sheet for all-solid-state batteries.
18. Multiple unit cells; and It includes an elastic sheet according to any one of claims 1 to 8, wherein Each of the above unit cells includes an anode and a cathode on the anode, and The elastic sheet is provided between two adjacent unit cells among the plurality of unit cells, All-solid-state battery.
19. In Paragraph 18, The above cathode includes a cathode coating layer and a cathode current collector, wherein The above cathode coating layer comprises at least one selected from carbon material and metal, All-solid-state battery.
20. In Paragraph 19, The above cathode further comprises a lithium precipitation layer between the cathode current collector and the cathode coating layer, All-solid-state battery.

Description

Elastic sheet for all-solid-state battery, method of manufacturing the same, and all-solid-state battery using the same The invention relates to an elastic sheet for an all-solid-state battery, a method for manufacturing the same, and an all-solid-state battery including the same. Recently, driven by industrial demands, the development of batteries with high energy density and stability is actively underway. For example, lithium-ion batteries are being commercialized not only in the fields of information and communication devices but also in the automotive sector. In the automotive sector, safety is considered particularly important because it is directly related to human life. Recently, all-solid-state batteries in which liquid electrolytes are replaced with solid electrolytes have been proposed. By not using flammable organic dispersion media, all-solid-state batteries can significantly reduce the likelihood of fire or explosion in the event of a short circuit. Therefore, these all-solid-state batteries can offer significantly higher safety compared to lithium-ion batteries that use liquid electrolytes. FIGS. 1 and FIGS. 2 are cross-sectional views schematically illustrating an all-solid-state battery according to one embodiment of the present invention. FIG. 3 is a plan view for explaining an all-solid-state battery according to one embodiment of the present invention. FIGS. 4 to 6 are cross-sectional views taken along line A-A' of FIG. 3 to illustrate an all-solid-state battery according to an embodiment of the present invention. FIG. 7 is a flowchart illustrating a method for manufacturing an elastic sheet for an all-solid-state battery according to one embodiment of the present invention. FIG. 8 is an electron microscope image of an elastic sheet for an all-solid-state battery according to one embodiment of the present invention. FIG. 9 is a cross-sectional view schematically illustrating an all-solid-state battery according to one embodiment of the present invention. FIG. 10 is a cross-sectional view of the enlarged area M of FIG. 9, intended to explain an elastic sheet for an all-solid-state battery according to one embodiment of the present invention. FIG. 11 is a cross-sectional view schematically illustrating an all-solid-state battery according to one embodiment of the present invention. FIG. 12 is a table showing the results of Evaluation Examples 1 to 4 for Examples 1 to 3 and Comparative Examples 1 to 3. In order to fully understand the structure and effects of the present invention, preferred embodiments of the present invention are described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various modifications can be made. The description of these embodiments is provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Additionally, in the drawings, the thicknesses of the components are exaggerated for the effective description of the technical content. Throughout the specification, parts indicated by the same reference numeral represent the same components. The embodiments described herein will be described with reference to cross-sectional and/or plan views, which are exemplary illustrations of the invention. In the drawings, the thicknesses of films and regions are exaggerated for effective description of the technical content. Accordingly, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific forms of regions of the device and are not intended to limit the scope of the invention. Although terms such as first, second, third, etc., have been used to describe various components in the various embodiments of this specification, these components should not be limited by such terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include their complementary embodiments. The terms used herein are for describing the embodiments and are not intended to limit the invention. Unless otherwise specified herein, singular forms may also include plural forms. Additionally, unless otherwise specified, "A or B" may mean "comprising A, comprising B, or comprising A and B." As used herein, "comprises" and/or "comprising" do not exclude the presence or addition of one or more other components to the mentioned components. Unless otherwise defined in this specification, the particle size may be the average particle size. Additionally, the particle size refers to the average particle size (D50), which means the dia