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KR-20260062680-A - All-solid-state battery and its manufacturing method

KR20260062680AKR 20260062680 AKR20260062680 AKR 20260062680AKR-20260062680-A

Abstract

A method for manufacturing an all-solid-state battery comprising: preparing a first transfer member by forming a first transfer layer on a first peelable substrate; slitting one side of the first transfer member; transferring the first transfer layer on the first peelable substrate onto an anode substrate; and preparing a first electrode by slitting the other side of the first transfer layer together with the anode substrate, wherein the first transfer layer comprises at least one of a first solid electrolyte layer and an anode active material layer.

Inventors

  • 이민석
  • 황수민
  • 민명기
  • 류영균

Assignees

  • 삼성에스디아이 주식회사

Dates

Publication Date
20260507
Application Date
20241029

Claims (20)

  1. Preparing a first transfer member by forming a first transfer layer on a first peelable substrate; Slitting one side of the first transfer member; Transferring the first transfer layer on the first peeling substrate onto the positive substrate; and The method includes preparing a first electrode by slitting the other side of the first transfer layer together with the anode substrate, wherein A method for manufacturing an all-solid-state battery, wherein the first transfer layer comprises at least one of a first solid electrolyte layer and a positive electrode active material layer.
  2. In paragraph 1, Transferring the above-mentioned first transfer layer is: Inverting the first transfer member and laminating it onto the anode substrate; and A method for manufacturing an all-solid-state battery comprising removing the first peeling substrate.
  3. In paragraph 1, The first transfer layer comprises the first solid electrolyte layer and the positive active material layer, and Preparing the above-mentioned first transfer member is: Forming the first solid electrolyte layer on the first peelable substrate; and A method for manufacturing an all-solid-state battery, comprising forming a positive active material layer on the first solid electrolyte layer.
  4. In paragraph 3, Forming the above positive active material layer is: A method for manufacturing an all-solid-state battery, comprising coating a positive electrode active material slurry on the first solid electrolyte layer.
  5. In paragraph 1, Preparing a second transfer member by forming a second transfer layer on a second peelable substrate; Slitting one side of the above-mentioned second transfer member; The method further comprises transferring the second transfer layer on the second peeling substrate onto the first transfer layer, The first transfer layer comprises the first solid electrolyte layer, and The above second transfer layer comprises the above positive active material layer, Method for manufacturing an all-solid-state battery.
  6. In paragraph 5, Transferring the second transfer layer onto the first transfer layer is performed before transferring the first transfer layer onto the anode substrate, and A method for manufacturing an all-solid-state battery in which the first transfer layer and the second transfer layer are transferred together onto the positive electrode substrate.
  7. In paragraph 5, Transferring the above second transfer layer onto the above first transfer layer is, A method for manufacturing an all-solid-state battery, performed after transferring the first transfer layer onto the positive electrode substrate.
  8. In paragraph 1, Slitting the one side of the first transfer member is: Based on the vertical direction from the upper surface to the lower surface of the first transfer member, A method for manufacturing an all-solid-state battery, comprising slitting one side of the first transfer member at an angle within ±5°.
  9. In paragraph 1, One side of the anode substrate includes a first tab portion protruding in a first direction, and A method for manufacturing an all-solid-state battery, wherein one side of the anode substrate is adjacent to one slit side of the first transfer layer.
  10. In paragraph 1, Forming a cathode coating layer on a cathode substrate; and A method for manufacturing an all-solid-state battery, further comprising forming a second solid electrolyte layer on the above-mentioned negative electrode coating layer to prepare a second electrode.
  11. In Paragraph 10, Arranging the first electrode and the second electrode so that the first and second solid electrolyte layers are adjacent to each other; and A method for manufacturing an all-solid-state battery, further comprising laminating the first electrode and the second electrode.
  12. A positive layer comprising a positive substrate and a positive active material layer on the positive substrate; and The above-mentioned anode layer includes a first solid electrolyte layer, wherein One side of the anode substrate includes a first tab portion protruding in a first direction, and The above positive active material layer includes a first side adjacent to the first tab portion, and The first solid electrolyte layer includes a second side adjacent to the first tab portion, and A solid-state battery in which the first angle of inclination formed by the first side and the lower surface of the anode layer is greater than 85° and less than 90°, or greater than 90° and less than 95°.
  13. In Paragraph 12, The above-mentioned first side and the above-mentioned second side are aligned with each other, forming an all-solid-state battery.
  14. In Paragraph 12, A solid-state battery in which the second angle of inclination and the first angle of inclination formed by the second side and the lower surface of the anode layer are substantially the same.
  15. In Paragraph 12, The above positive active material layer includes a fourth side spaced apart from the first side in the first direction, and The first solid electrolyte layer includes a fifth side spaced apart from the second side in the first direction, and The above anode substrate includes a sixth side adjacent to the fourth side, and The above-mentioned fourth to sixth sides are aligned with each other, forming an all-solid-state battery.
  16. In Paragraph 12, A second solid electrolyte layer on the first solid electrolyte layer; and All-solid-state battery comprising a negative electrode layer on the second solid electrolyte layer.
  17. In Paragraph 16, An all-solid-state battery in which the ratio of the thickness of the second solid electrolyte layer to the thickness of the first solid electrolyte layer is 1 to 20.
  18. In Paragraph 12, An all-solid-state battery having a thickness of 1 μm to 25 μm for the first solid electrolyte layer.
  19. A positive layer comprising a positive substrate and a positive active material layer on the positive substrate; and The above-mentioned anode layer includes a first solid electrolyte layer, wherein One side of the anode substrate includes a first tab portion protruding in a first direction, and The above positive active material layer includes a first side adjacent to the first tab portion, and The first solid electrolyte layer includes a second side adjacent to the first tab portion, and The above-mentioned first side and the above-mentioned second side are aligned with each other, forming an all-solid-state battery.
  20. In Paragraph 19, A second solid electrolyte layer on the first solid electrolyte layer; and All-solid-state battery comprising a negative electrode layer on the second solid electrolyte layer.

Description

All-solid-state battery and its manufacturing method The present invention relates to an all-solid-state battery and a method for manufacturing the same. Recently, driven by industrial demands, the development of batteries with high energy density and safety 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 have been proposed in which the liquid electrolyte of lithium-ion batteries is replaced with a solid electrolyte. 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, such all-solid-state batteries can possess excellent safety. FIG. 1 is a cross-sectional view of an all-solid-state battery according to one embodiment of the present invention. FIG. 2 is a plan view of an all-solid-state battery according to one embodiment of the present invention. FIG. 3 is a cross-sectional view of an all-solid-state battery according to another embodiment of the present invention. FIG. 4 is a cross-sectional view of an all-solid-state battery according to another embodiment of the present invention. FIG. 5 is a cross-sectional view of an all-solid-state battery according to another embodiment of the present invention. FIG. 6 is a cross-sectional view of an all-solid-state battery according to another embodiment of the present invention. FIG. 7 is a cross-sectional view of an all-solid-state battery according to another embodiment of the present invention. FIG. 8a is a plan view illustrating a positive electrode for an all-solid-state battery according to a comparative example. FIG. 8b is a cross-sectional view along the line A-A' of FIG. 8a. FIG. 9 is a flowchart for explaining a method for manufacturing an all-solid-state battery according to one embodiment of the present invention. FIGS. 10a to 10d are cross-sectional views illustrating the formation of a first transfer layer on a first release substrate. FIG. 10e is a cross-sectional view along line A-A' of FIG. 10d. FIG. 10f is a cross-sectional view along line B-B' of FIG. 10d. FIG. 10g is a cross-sectional view illustrating the removal of the first peeling substrate. FIG. 10h is a cross-sectional view illustrating slitting the other side of the first electrode. FIG. 12a is a cross-sectional view illustrating the preparation of the first and second transfer members. FIGS. 12b and FIGS. 12c are cross-sectional views illustrating slitting one side of the first and second transfer members. FIGS. 12d to 12g are cross-sectional views for illustrating the transfer of the transfer layers of the first and second transfer members. FIG. 12h is a cross-sectional view illustrating slitting the other side of the first electrode. FIG. 13a is a plan view illustrating the first electrode of an all-solid-state battery manufactured by the manufacturing method (S10) described above with reference to FIG. 9. FIG. 13b is a cross-sectional view along the line A-A' of FIG. 13a. FIG. 13c is a cross-sectional view along the line B-B' of FIG. 13a. FIG. 14a is a plan view illustrating a first electrode of an all-solid-state battery manufactured by the manufacturing method (S10a) described above with reference to FIG. 11. FIG. 14b is a cross-sectional view along the line A-A' of FIG. 14a. FIG. 14c to 14e are examples of partial modifications of the first electrode of FIG. 14a. 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