solid-state batteries

Abstract

To provide a solid-state battery in which an insulating frame can be stably disposed.SOLUTION: A solid-state battery 100 includes: an electrode laminate 110 in which a negative electrode mixture layer 112, a solid electrolyte layer 114, and a positive electrode mixture layer 115 are sequentially laminated over a negative electrode current collector 111; and a positive electrode current collector 120. An insulating frame 130 is provided along an outer periphery of the positive electrode mixture layer 115 and an outer periphery of the positive electrode current collector 120. In the solid-state battery 100, a positive electrode tab 120A extends from the positive electrode current collector 120. In a cross section parallel to a laminating direction of the electrode laminate 110 and perpendicular to a direction in which the positive electrode tab 120A extends, the solid electrolyte layer 114 has a first region 114a disposed inside the insulating frame 130 and a second region 114b disposed outside the insulating frame 130. When the solid-state battery 100 is viewed from above, an outer peripheral edge of the second region 114b is located outside an outer peripheral edge of the first region 114a.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This invention relates to a solid-state battery. [Background technology]

[0002] In recent years, research and development of rechargeable batteries that contribute to energy efficiency have been conducted to ensure that many people have access to affordable, reliable, sustainable, and advanced energy.

[0003] Patent Document 1 describes an all-solid-state battery comprising: a positive electrode current collector layer; a first positive electrode active material layer laminated on one side surface of the positive electrode current collector layer; a second positive electrode active material layer laminated on the other side surface of the positive electrode current collector layer; a first solid electrolyte layer laminated on one side surface of the first positive electrode active material layer; a second solid electrolyte layer laminated on the other side surface of the second positive electrode active material layer; a first negative electrode active material layer laminated on one side surface of the first solid electrolyte layer; a second negative electrode active material layer laminated on the other side surface of the second solid electrolyte layer; a first negative electrode current collector layer laminated on one side surface of the first negative electrode active material layer; and a second negative electrode current collector layer laminated on the other side surface of the second negative electrode active material layer. In this all-solid-state battery, the positive electrode current collector layer extends outward beyond the first negative electrode active material layer and the second negative electrode active material layer, forming an extension portion, and an insulating resin layer is continuously provided across one side surface of the extension portion, the side surface of the extension portion, and the other side surface of the extension portion. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-4697 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, the all-solid-state battery described in Patent Document 1 has the problem of insufficient strength.

[0006] To improve the strength of solid-state batteries, for example, an insulating frame can be installed around the outer periphery of the solid-state battery, but it is desirable to be able to install the insulating frame stably.

[0007] The present invention aims to provide a solid-state battery that allows for the stable installation of an insulating frame. [Means for solving the problem]

[0008] (1) A solid-state battery comprising an electrode laminate in which a negative electrode composite layer, a solid electrolyte layer, and a positive electrode composite layer are sequentially laminated on a negative electrode current collector, and a positive electrode current collector, wherein an insulating frame is provided on the outer periphery of the positive electrode composite layer and the positive electrode current collector, a positive electrode tab extends from the positive electrode current collector, and in a cross section parallel to the lamination direction of the electrode laminate and perpendicular to the direction in which the positive electrode tab extends, the solid electrolyte layer has a first region located inside the insulating frame and a second region located outside the insulating frame, and when the solid-state battery is viewed from above, the outer periphery of the second region is located outside the outer periphery of the first region.

[0009] (2) The solid battery according to (1), wherein, when the solid battery is viewed from above, the outer edge of the first region is at the same position as the outer edge of the positive electrode composite layer, or is located outside the outer edge of the positive electrode composite layer, and the outer edge of the second region is at the same position as the outer edge of the negative electrode composite layer, or is located outside the outer edge of the negative electrode composite layer.

[0010] (3) The insulating frame has a communication hole, the solid battery as described in (1) or (2).

[0011] (4) The solid battery according to any one of (1) to (3), wherein the first region and the second region are joined by applying a solvent capable of dissolving the solid electrolyte or a slurry containing the solid electrolyte.

[0012] A solid battery comprising: an electrode laminate in which a positive electrode mixture layer, a solid electrolyte layer, and a negative electrode mixture layer are sequentially laminated on a positive electrode current collector; and a negative electrode current collector, wherein an insulating frame is provided on an outer peripheral portion of the negative electrode mixture layer and the negative electrode current collector, a negative electrode tab extends from the negative electrode current collector, in a cross section parallel to a lamination direction of the electrode laminate and perpendicular to an extending direction of the negative electrode tab, the solid electrolyte layer has a first region disposed inside the insulating frame and a second region disposed outside the insulating frame, and when the solid battery is viewed from a top surface, an outer peripheral edge of the second region is located outside an outer peripheral edge of the first region. Effects of the Invention

[0013] According to the present invention, a solid battery in which an insulating frame can be stably installed can be provided. Brief Description of Drawings

[0014] [Figure 1] It is a top view showing an example of the solid battery of the present embodiment. [Figure 2] It is a cross-sectional view showing the solid battery of FIG. 1. [Figure 3] It is a cross-sectional view showing another example of the solid battery of the present embodiment. [Figure 4] It is a schematic diagram (No. 1) for explaining the manufacturing method of the solid battery of FIG. 1. [Figure 5] It is a schematic diagram (No. 2) for explaining the manufacturing method of the solid battery of FIG. 1. [Figure 6] It is a schematic diagram (No. 3) for explaining the manufacturing method of the solid battery of FIG. 1. [Figure 7] It is a cross-sectional view showing a modification of the solid battery of FIG. 1. Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0016] Figures 1 and 2 show an example of a solid-state battery according to this embodiment. Figures 2(a) and 2(b) are cross-sectional views in the AA and BB directions of Figure 1, respectively.

[0017] The solid-state battery 100 is an electrode laminate 110 in which a negative electrode composite layer 112, an intermediate layer 113, a solid electrolyte layer 114, and a positive electrode composite layer 115 are sequentially stacked on a negative electrode current collector 111, with a positive electrode current collector 120 sandwiched in between. In this case, the negative electrode tab 111A extends from the negative electrode current collector 111, and the positive electrode tab 120A extends from the positive electrode current collector 120. In this case, the direction in which the negative electrode tab 111A extends is opposite to the direction in which the positive electrode tab 120A extends. Furthermore, the solid-state battery 100 is provided with insulating frames 130 on the outer periphery of the positive electrode composite layer 115 and the positive electrode current collector 120. This improves the strength of the solid-state battery 100. However, in the region where the positive electrode tab 120A extends from the positive electrode current collector 120, the insulating frame 130 is not provided, and an insulating layer 140 is formed therein. As a result, the occurrence of short circuits is suppressed in the solid battery 100. Furthermore, in a cross section parallel to the stacking direction of the electrode stack 110 and perpendicular to the direction in which the positive electrode tab 120A extends, i.e., in the BB direction, the solid electrolyte layer 114 has a first region 114a located inside the insulating frame 130 and a second region 114b located outside the insulating frame 130.

[0018] Here, when viewing the solid battery 100 from above, the outer edge of the second region 114b is located outside the outer edge of the first region 114a in a direction perpendicular to the direction in which the positive electrode tab 120A extends (see Figure 2(b)). On the other hand, when viewing the solid battery 100 from above, the outer edge of the second region 114b is located at the same position as the outer edge of the first region 114a in the direction in which the positive electrode tab 120A extends (see Figure 2(a)). In other words, when viewing the solid battery 100 from above, the outer edge of the second region 114b is located outside the outer edge of the first region 114a. As a result, the insulating frame 130 is stably installed, and consequently, the occurrence of stacking misalignment and uneven contact of the solid battery 100 is suppressed.

[0019] In this specification and in the claims, "when the solid battery is viewed from above, the outer edge of the second region is located outside the outer edge of the first region" means that when the solid battery is viewed from above, at least a portion of the outer edge of the second region is located outside the outer edge of the first region, and the outer edge of the first region is not located outside the outer edge of the second region.

[0020] Furthermore, when the solid battery 100 is viewed from above, the outer edge of the second region 114b may be located outside the outer edge of the first region 114a in the direction in which the positive electrode tab 120A extends. In this case, when the solid battery 100 is viewed from above, the outer edge of the second region 114b may be located at the same position as the outer edge of the first region 114a in a direction perpendicular to the direction in which the positive electrode tab 120A extends.

[0021] When the solid-state battery 100 is viewed from above, the outer edge of the first region 114a is at the same position as the outer edge of the positive electrode composite layer 115, or is located outside the outer edge of the positive electrode composite layer 115, and the outer edge of the second region 114b is located outside the outer edge of the negative electrode composite layer 112 (see Figures 2(a) and (b)). As a result, the occurrence of short circuits is suppressed in the solid-state battery 100.

[0022] Furthermore, when the solid battery 100 is viewed from above, the outer edge of the second region 114b may be located at the same position as the outer edge of the negative electrode composite layer 112.

[0023] The materials constituting the insulating frame 130 are not particularly limited as long as they have electronic insulating properties, but examples include insulating oxides such as alumina, resins such as polyvinylidene fluoride (PVDF), and rubbers such as styrene-butadiene rubber (SBR).

[0024] The insulating frame 130 may also have ionic conductivity.

[0025] Furthermore, the insulating frame 130 may have communication holes. This makes it easier to remove the solvent used when joining the first region 114a and the second region 114b, as described later, or the solvent contained in the slurry. In this case, it is preferable that the communication holes are formed on a surface parallel to the direction in which the negative electrode tab 111A and the positive electrode tab 120A of the insulating frame 130 extend.

[0026] Examples of insulating frames 130 having communication holes include foam, mesh, and the like.

[0027] The material constituting the insulating layer 140 is not particularly limited as long as it has electronic insulating properties, but examples include resins such as polyvinylidene fluoride (PVDF) and rubbers such as styrene-butadiene rubber (SBR).

[0028] The insulating layer 140 may also have ionic conductivity.

[0029] When the solid battery 100 is viewed from above, the outer edge of the insulating layer 140 is located outside the outer edge of the solid electrolyte layer 114 on the side from which the positive electrode tab 120A extends. In other words, the insulating layer 140 is in contact with a portion of the positive electrode tab 120A on the side of the positive electrode current collector 120. As a result, the occurrence of short circuits is suppressed, and the strength of the solid battery 100 is improved.

[0030] Furthermore, when the solid battery 100 is viewed from above, the outer peripheral end on the side from which the positive electrode tab 120A of the first region 114a extends may be located outside the outer peripheral end on the side from which the positive electrode tab 120A of the second region 114b extends. In this case, the outer peripheral end of the insulating layer 140 is located outside the outer peripheral end on the side from which the positive electrode tab 120A of the first region 114a extends.

[0031] Furthermore, when the solid battery 100 is viewed from above, the outer edge of the insulating layer 140 may be located at the same position as the outer edge of the solid electrolyte layer 114 on the side from which the positive electrode tab 120A extends.

[0032] When the solid battery 100 is viewed from above, the outer peripheral end of the second region 114b on the side where the negative electrode tab 111A extends is located outside the outer peripheral end of the negative electrode current collector 111. In other words, the second region 114b is in contact with a portion of the negative electrode tab 111A on the side of the negative electrode current collector 111. This improves the strength of the solid battery 100.

[0033] Furthermore, when the solid battery 100 is viewed from above, the outer peripheral end of the second region 114b on the side from which the negative electrode tab 111A extends may be in the same position as the outer peripheral end of the negative electrode current collector 111.

[0034] When the solid battery 100 is viewed from above, the outer edge of the intermediate layer 113 is located outside the outer edge of the negative electrode composite layer 112, and is in the same position as the outer edge of the negative electrode current collector 111. In other words, the intermediate layer 113 is in contact with a part of the outer edge of the negative electrode current collector 111. Therefore, the occurrence of short circuits is suppressed.

[0035] Furthermore, when the solid battery 100 is viewed from above, the outer edge of the intermediate layer 113 may be in the same position as the outer edge of the negative electrode composite layer 112.

[0036] For example, if the solid battery 100 is a lithium metal secondary battery, the intermediate layer 113 has the function of uniformly depositing Li metal. As a result, the interface between the intermediate layer 113 and the solid electrolyte layer 114 is stabilized. Here, the lithium metal secondary battery may be an anode-free battery in which the negative electrode composite layer 112 does not exist at the time of the first charge. In this case, after the first charge and discharge, a lithium metal layer is formed as the negative electrode composite layer 112.

[0037] The material constituting the intermediate layer 113 is not particularly limited, but examples include carbon on which a metal capable of alloying with Li (e.g., Ag) is supported.

[0038] Furthermore, the electrode laminate 110 may be configured without the intermediate layer 113 and / or insulating layer 140, if necessary. Also, the electrode laminate 110 sandwiching the positive electrode current collector 120 may be the same or different.

[0039] Figure 3 shows another example of the solid-state battery of this embodiment.

[0040] The solid-state battery 200 is made up of multiple solid-state batteries 100 stacked on top of each other, with the negative electrode current collectors 111 of adjacent solid-state batteries 100 in contact with each other.

[0041] The manufacturing method of the solid-state battery 100 will be explained using Figures 4 to 6.

[0042] A positive electrode composite layer 115 and an insulating layer 140 are formed on predetermined areas on both sides of the positive electrode current collector substrate 410 by a coating method (see Figure 4(a)). Next, a first region 114a of the solid electrolyte layer 114 is formed on the predetermined area of ​​the positive electrode current collector substrate 410 on which the positive electrode composite layer 115 and the insulating layer 140 are formed by a transfer method or a coating method. Next, after roll pressing, it is punched out into a predetermined shape (see Figure 4(c)) to obtain a positive electrode-solid electrolyte laminate 420 (see Figure 4(d)). As a result, the shape and dimensions of the ends of the positive electrode-solid electrolyte laminate 420 can be controlled, and misalignment of the positive electrode composite layer 115 on the front and back sides of the positive electrode current collector 120 is suppressed. In addition, the adhesion between the positive electrode composite layer 115 and the first region 114a is improved, and the protrusion of the first region 114a is suppressed.

[0043] A negative electrode composite layer 112 is formed on a predetermined area on one side of the negative electrode current collector substrate 510 by a coating method (see Figure 5(a)). Next, an intermediate layer 113 is formed on a predetermined area of ​​the negative electrode current collector substrate 510 on which the negative electrode composite layer 112 is formed by a transfer method or a coating method (see Figure 5(b)). Next, a second area 114b of the solid electrolyte layer 114 is formed on a predetermined area of ​​the negative electrode current collector substrate 510 on which the intermediate layer 113 is formed by a transfer method or a coating method (see Figure 5(c)). Next, after roll pressing, it is punched out into a predetermined shape (see Figure 5(d)) to obtain a negative electrode-intermediate layer-solid electrolyte laminate 520 (see Figure 5(e)). This suppresses contact between the negative electrode composite layer 112 and the second area 114b, and also suppresses the detachment of the intermediate layer 113. Furthermore, the adhesion between the negative electrode composite layer 112, the intermediate layer 113, and the second region 114b is improved, and the protrusion of the intermediate layer 113 and the second region 114b is suppressed.

[0044] An insulating frame 130 is placed in a predetermined position on the negative electrode-intermediate layer-solid electrolyte laminate 520 (see Figure 6(a)) (see Figure 6(b)). Next, the positive electrode-solid electrolyte laminate 420 is placed in a predetermined position on the negative electrode-intermediate layer-solid electrolyte laminate 520 where the insulating frame 130 is placed, such that the first region 114a and the second region 114b of the solid electrolyte layer 114 face each other (see Figure 6(c)). After placing the negative electrode-intermediate layer-solid electrolyte laminate 520 in a predetermined position on the negative electrode-intermediate layer-solid electrolyte laminate 520 where the insulating frame 130 and the positive electrode-solid electrolyte laminate 420 are placed, such that the first region 114a and the second region 114b of the solid electrolyte layer 114 face each other, it is uniaxially pressed to obtain a solid battery 100 (see Figure 6(d)).

[0045] Here, when arranging the positive electrode-solid electrolyte laminate 420 (see Figure 6(c)) and the negative electrode-intermediate layer-solid electrolyte laminate 520 (see Figure 6(d)), a solvent capable of dissolving the solid electrolyte constituting the solid electrolyte layer 114, or a slurry containing the solid electrolyte constituting the solid electrolyte layer 114, is applied to the surface of the first region 114a and / or the second region 114b. As a result, the first region 114a and the second region 114b are joined, and the interfacial resistance is reduced. If necessary, heating and drying may be performed to remove the solvent used to join the first region 114a and the second region 114b, or the solvent contained in the slurry. The timing of heating and drying may be before or after uniaxial pressing. For example, heating and drying may be performed after the solid battery 100 is restrained by the end plate. This suppresses the occurrence of stacking misalignment and uneven contact of the solid battery 100.

[0046] Figure 7 shows a modified example of the solid-state battery 100. Note that Figure 7 is a cross-sectional view corresponding to the AA direction in Figure 1.

[0047] The solid battery 300 has the same configuration as the solid battery 100, except that instead of the insulating layer 140, it has a solid electrolyte layer 310 and an insulating tape 320 attached to the outer periphery of the solid electrolyte layer 310.

[0048] When the solid battery 300 is viewed from above, the outer edge of the solid electrolyte layer 310 is located at the same position as the outer edge of the solid electrolyte layer 114 on the side from which the positive electrode tab 120A extends.

[0049] Furthermore, when the solid battery 100 is viewed from above, the outer edge of the solid electrolyte layer 310 may be located outside the outer edge of the solid electrolyte layer 114 on the side from which the positive electrode tab 120A extends. In this case, the insulating tape 320 does not need to be attached to the outer edge of the solid electrolyte layer 310.

[0050] The material constituting the solid electrolyte layer 310 may be the same as or different from the material constituting the solid electrolyte layer 114.

[0051] The material constituting the insulating tape 320 is not particularly limited as long as it has electronic insulating properties, and examples thereof include resins such as polyimide. Examples of commercially available polyimide films constituting the insulating tape 320 include Kapton (manufactured by Toray DuPont) and the like.

[0052] Note that the insulating tape 320 may have ionic conductivity.

[0053] Hereinafter, the case where the solid-state battery of the present embodiment is an all-solid lithium secondary battery will be described.

[0054] The positive electrode current collector is not particularly limited, and examples thereof include aluminum foil.

[0055] The positive electrode mixture layer contains a positive electrode active material, and may further contain a solid electrolyte, a conductive aid, a binder, and the like.

[0056] The positive electrode active material is not particularly limited as long as it can occlude and release lithium ions, and examples thereof include LiCoO₂, Li(Ni 5 / 10 Co 2 / 10 Mn 3 / 10 )O 2、 Li(Ni 6 / 10 Co 2 / 10 Mn 2 / 10 )O 2、 Li(Ni 8 / 10 Co 1 / 10 Mn 1 / 10 )O 2、 Li(Ni 0.8 Co 0.15 Al 0.05 )O 2、 Li(Ni 1 / 6 Co 4 / 6 Mn 1 / 6 )O 2、 Li(Ni 1 / 3 Co 1 / 3 Mn 1 / 3 )O 2、 LiCoO₄, LiMn₂O₄, LiNiO₂, LiFePO₄, lithium sulfide, sulfur and the like can be mentioned.

[0057] The solid electrolyte constituting the solid electrolyte layer is not particularly limited as long as it is a material capable of conducting lithium ions, but examples include oxide-based electrolytes and sulfide-based electrolytes.

[0058] The solvent capable of dissolving solid electrolytes is not particularly limited, but examples include butyl butyrate. Similarly, the solvent used in a slurry containing a solid electrolyte is not particularly limited, but examples include butyl butyrate.

[0059] The negative electrode composite layer contains a negative electrode active material and may further contain a solid electrolyte, a conductive additive, a binder, and the like.

[0060] The negative electrode active material is not particularly limited as long as it is capable of intercalating and releasing lithium ions, but examples include metallic lithium, lithium alloys, metal oxides, metal sulfides, metal nitrides, Si, SiO, and carbon materials. Examples of carbon materials include artificial graphite, natural graphite, hard carbon, and soft carbon.

[0061] The negative electrode current collector is not particularly limited, but examples include copper foil.

[0062] Although embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and the above embodiments may be modified as appropriate within the scope of the spirit of the present invention. For example, the arrangement of the positive electrode and negative electrode in the solid battery may be reversed. In this case, the solid battery comprises an electrode laminate in which a positive electrode composite layer, a solid electrolyte layer, and a negative electrode composite layer are sequentially laminated on a positive electrode current collector, and a negative electrode current collector, with insulating frames provided on the outer periphery of the negative electrode composite layer and the negative electrode current collector. Furthermore, in a cross-section parallel to the lamination direction of the electrode laminate and perpendicular to the direction in which the negative electrode tab extends, the solid electrolyte layer has a first region located inside the insulating frame and a second region located outside the insulating frame. [Explanation of symbols]

[0063] 100, 200 solid state battery 110 Electrode Stack 111 Negative electrode current collector 111A Negative Electrode Tab 112 Negative electrode composite layer 113 Middle Class 114 Solid electrolyte layer 114a First area 114b Second area 115 Positive electrode composite layer 120 Positive electrode current collector 120A Positive Tab 130 Insulation frame 140 Insulating layer 310 Solid electrolyte layer 320 Insulating Tape 410 Base material for positive electrode current collector 420 Cathode-Solid Electrolyte Laminate 510 Base material for negative electrode current collector 520 Negative electrode-intermediate layer-solid electrolyte laminate

Claims

1. A solid-state battery comprising an electrode laminate in which a negative electrode composite layer, a solid electrolyte layer, and a positive electrode composite layer are sequentially laminated on a negative electrode current collector, and a positive electrode current collector, When the solid battery is viewed from the stacking direction of the electrode stack, an insulating frame is provided on the outer periphery of the positive electrode composite layer and the positive electrode current collector. A positive electrode tab extends from the positive electrode current collector, In a cross-section parallel to the stacking direction of the electrode stack and perpendicular to the direction in which the positive electrode tab extends, the solid electrolyte layer has a first region located inside the insulating frame and a second region located outside the insulating frame. When the solid battery is viewed from the stacking direction of the electrode stack, the outer edge of the second region is located outside the outer edge of the first region. A solid-state battery in which, when viewed from the stacking direction of the electrode stack, the outer edge of the first region is at the same position as the outer edge of the positive electrode composite layer, or is located outside the outer edge of the positive electrode composite layer, and the outer edge of the second region is at the same position as the outer edge of the negative electrode composite layer, or is located outside the outer edge of the negative electrode composite layer.

2. A solid-state battery comprising an electrode laminate in which a negative electrode composite layer, a solid electrolyte layer, and a positive electrode composite layer are sequentially laminated on a negative electrode current collector, and a positive electrode current collector, When the solid battery is viewed from the stacking direction of the electrode stack, an insulating frame is provided on the outer periphery of the positive electrode composite layer and the positive electrode current collector. A positive electrode tab extends from the positive electrode current collector, In a cross-section parallel to the stacking direction of the electrode stack and perpendicular to the direction in which the positive electrode tab extends, the solid electrolyte layer has a first region located inside the insulating frame and a second region located outside the insulating frame. When the solid battery is viewed from the stacking direction of the electrode stack, the outer edge of the second region is located outside the outer edge of the first region. The insulating frame is a solid battery having a communication hole.

3. A method for manufacturing a solid battery, The solid-state battery comprises an electrode laminate in which a negative electrode composite layer, a solid electrolyte layer, and a positive electrode composite layer are sequentially stacked on a negative electrode current collector, and a positive electrode current collector. When the solid battery is viewed from the stacking direction of the electrode stack, an insulating frame is provided on the outer periphery of the positive electrode composite layer and the positive electrode current collector. The solid battery has a positive electrode tab extending from the positive electrode current collector, In a cross-section of the solid battery that is parallel to the stacking direction of the electrode stack and perpendicular to the direction in which the positive electrode tab extends, the solid electrolyte layer has a first region located inside the insulating frame and a second region located outside the insulating frame. When the solid battery is viewed from the stacking direction of the electrode stack, the outer edge of the second region is located outside the outer edge of the first region. A method for manufacturing a solid-state battery, comprising the step of joining the first region and the second region by applying a solvent capable of dissolving the solid electrolyte, or a slurry containing the solid electrolyte, to the surface of the first region and / or the second region.

4. A solid-state battery comprising an electrode laminate in which a positive electrode composite layer, a solid electrolyte layer, and a negative electrode composite layer are sequentially laminated on a positive electrode current collector, and a negative electrode current collector, When the solid battery is viewed from the stacking direction of the electrode stack, an insulating frame is provided on the outer periphery of the negative electrode composite layer and the negative electrode current collector. A negative electrode tab extends from the aforementioned negative electrode current collector. In a cross-section parallel to the stacking direction of the electrode stack and perpendicular to the direction in which the negative electrode tab extends, the solid electrolyte layer has a first region located inside the insulating frame and a second region located outside the insulating frame. When the solid battery is viewed from the stacking direction of the electrode stack, the outer edge of the second region is located outside the outer edge of the first region. A solid-state battery in which, when viewed from the stacking direction of the electrode stack, the outer edge of the first region is at the same position as the outer edge of the negative electrode composite layer, or is located outside the outer edge of the negative electrode composite layer, and the outer edge of the second region is at the same position as the outer edge of the positive electrode composite layer, or is located outside the outer edge of the positive electrode composite layer.

5. A solid-state battery comprising an electrode laminate in which a positive electrode composite layer, a solid electrolyte layer, and a negative electrode composite layer are sequentially laminated on a positive electrode current collector, and a negative electrode current collector, When the solid battery is viewed from the stacking direction of the electrode stack, an insulating frame is provided on the outer periphery of the negative electrode composite layer and the negative electrode current collector. A negative electrode tab extends from the aforementioned negative electrode current collector. In a cross-section parallel to the stacking direction of the electrode stack and perpendicular to the direction in which the negative electrode tab extends, the solid electrolyte layer has a first region located inside the insulating frame and a second region located outside the insulating frame. When the solid battery is viewed from the stacking direction of the electrode stack, the outer edge of the second region is located outside the outer edge of the first region. The insulating frame is a solid battery having a communication hole.

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