KR-20260063452-A - All-solid-state battery

Abstract

A solid-state battery according to one embodiment comprises a laminate including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer stacked along a first direction, a first external electrode disposed outside the laminate and connected to the positive electrode layer, and a second external electrode disposed outside the laminate and connected to the negative electrode layer, wherein a through hole is disposed along the first direction in the central portion of the laminate, and the cross-sectional shape of the laminate may be trapezoidal.

Inventors

• 김동원
• 금동훈

Assignees

• 삼성전기주식회사

Dates

Publication Date

20260507

Application Date

20241030

Claims (19)

1. A laminate comprising an anode layer, a solid electrolyte layer, and a cathode layer stacked along a first direction, A first external electrode disposed outside the laminate and connected to the anode layer, and A second external electrode disposed outside the laminate and connected to the cathode layer Includes, A through hole is arranged along the first direction in the central part of the above laminate, and A solid-state battery in which the cross-sectional shape of the above-mentioned laminate is trapezoidal.
2. In paragraph 1, A solid-state battery in which the cross-section of the above-described laminate intersects the anode layer, the solid electrolyte layer, and the cathode layer simultaneously.
3. In paragraph 1, The above laminate includes a first surface and a second surface positioned opposite each other in the first direction, and A solid-state battery in which the area of the first surface and the area of the second surface are different.
4. In paragraph 1, The above through hole includes a first opening and a second opening positioned opposite each other in the first direction, and A solid-state battery in which the area of the first opening and the area of the second opening are the same.
5. In Paragraph 4, The above-mentioned through hole is a cylindrical shape, in an all-solid-state battery.
6. In paragraph 1, The above through hole includes a first opening and a second opening positioned opposite each other in the first direction, and A solid-state battery in which the area of the first opening and the area of the second opening are different.
7. In paragraph 6, The above-mentioned through hole has a frustum shape, in an all-solid-state battery.
8. In paragraph 1, A solid-state battery in which, when viewed from the first direction, the outer circumference of the laminate includes a curved portion.
9. In paragraph 8, All-solid-state battery, wherein when viewed from the first direction, the through hole is circular and the outer circumference of the laminate is circular.
10. In Paragraph 9, A solid-state battery in which the center of the through hole and the center of the outer circumference of the laminate are at the same location.
11. In paragraph 8, A solid-state battery in which, when viewed from the first direction, the through hole is circular and the radius of the through hole is the same as the radius of curvature of the curved portion.
12. In paragraph 8, A solid-state battery in which, when viewed from the first direction, the through hole is circular and the radius of the through hole is different from the radius of curvature of the curved portion.
13. In paragraph 8, When viewed from the first direction, the outer circumference of the laminate is a straight section connected to the curved section. A solid-state battery further comprising
14. In Paragraph 13, The above straight section is, A first straight section and a second straight section located on opposite sides in a second direction intersecting the first direction, and A solid-state battery comprising a third straight section and a fourth straight section located opposite each other in a third direction that intersects simultaneously with the first direction and the second direction.
15. In Paragraph 14, The first straight section and the second straight section have the same length, A solid-state battery having the same length for the third straight section and the fourth straight section.
16. In Paragraph 15, A solid-state battery in which the first straight section, the second straight section, the third straight section, and the fourth straight section all have the same length.
17. In Paragraph 14, The above curved section is, A first curved section positioned between the first straight section and the fourth straight section, A second curved section positioned between the fourth straight section and the second straight section, A third curved section disposed between the second straight section and the third straight section, and A fourth curved section positioned between the third straight section and the first straight section. All-solid-state battery including
18. In Paragraph 13, A solid-state battery in which, when viewed from the first direction, the through hole is circular and the radius of the through hole is the same as the radius of curvature of the curved portion.
19. In Paragraph 13, A solid-state battery in which, when viewed from the first direction, the through hole is circular and the radius of the through hole is different from the radius of curvature of the curved portion.

Description

All-solid-state battery The present disclosure relates to an all-solid-state battery. Since commercially available lithium-ion batteries use electrolytes containing flammable organic solvents, there is a possibility of overheating and fire in the event of a short circuit. Therefore, all-solid-state batteries using solid electrolytes instead of liquid electrolytes are being proposed. Recently, wearable electronic devices have become widespread, and there is a demand for all-solid-state batteries that can be mounted in wearable electronic devices of various shapes. FIG. 1 is a schematic perspective view illustrating an all-solid-state battery according to one embodiment. FIG. 2 is a perspective view schematically illustrating the laminate of FIG. 1. Figure 3 is a schematic plan view illustrating the laminate of Figure 1. Figure 4 is a cross-sectional view taken along line II' of Figure 1. FIG. 5 is a partial cross-sectional view schematically illustrating the positive electrode layer of the all-solid-state battery of FIG. 1. FIG. 6 is a partial cross-sectional view schematically illustrating the negative electrode layer of the all-solid-state battery of FIG. 1. Figure 7 is a cross-sectional view taken along the line II-II' of Figure 4. Figure 8 is a cross-sectional view taken along the line III-III' of Figure 4. Figure 9 is a cross-sectional view taken along the line IV-IV' of Figure 1. Figure 10 is a cross-sectional view taken along the V-V' line of Figure 1. FIG. 11 is a schematic perspective view illustrating an all-solid-state battery according to another embodiment. FIG. 12 is a perspective view schematically illustrating the laminate of FIG. 11. FIG. 13 is a schematic plan view illustrating the laminate of FIG. 11. Figure 14 is a cross-sectional view taken along the line VI-VI' of Figure 11. FIG. 15 is a cross-sectional view taken along the line VII-VII' of FIG. 14. FIG. 16 is a cross-sectional view taken along the line VIII-VIII' of FIG. 14. FIG. 17 is a cross-sectional view schematically illustrating an all-solid-state battery according to another embodiment. FIG. 18 is a schematic perspective view illustrating the laminate of FIG. 17. FIG. 19 is a cross-sectional view schematically illustrating an all-solid-state battery according to another embodiment. FIG. 20 is a perspective view schematically illustrating the laminate of FIG. 19. FIG. 21 is a cross-sectional view schematically illustrating a ring-shaped wearable electronic device having an all-solid-state battery mounted thereon according to one embodiment. Fig. 22 is a plan view of Fig. 21. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. In order to clearly explain the invention in the drawings, parts unrelated to the explanation have been omitted, and the same reference numerals have been used for identical or similar components throughout the specification. Furthermore, in the attached drawings, some components may be exaggerated, omitted, or schematically depicted, and the size of each component does not entirely reflect its actual size. The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that all modifications, equivalents, and substitutions included within the concept and technical scope of the present invention are included. Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Throughout the specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Accordingly, when a part is said to “comprising” a certain component, unless specifically stated otherwise, this means that it may include additional components rather than excluding o