All-solid-state battery and method for manufacturing all

Abstract

To provide an all-solid battery with improved dimensional stability.SOLUTION: An all-solid-state battery comprising a laminate structure comprising a positive electrode current collector layer (A), a positive electrode active material layer (B), a solid electrolyte layer (C), a negative electrode active material layer (D), and a negative electrode current collector layer (E) in this order, and further comprising an insulating member 10 in contact with at least one of a side surface of the positive electrode current collector layer (A) and a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D) and a side surface of the negative electrode current collector layer (E).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an all-solid-state battery and a method for manufacturing an all-solid-state battery. [Background technology]

[0002] There is an all-solid-state battery that has a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer.

[0003] Patent Document 1 describes a method for manufacturing an all-solid-state battery, with the aim of providing a method for manufacturing an all-solid-state battery capable of improving adhesion between a current collecting layer and a composite layer, including the steps of: preparing a first current collecting layer having an adhesive layer; stacking the first composite layer, a solid electrolyte layer, a second composite layer, and a second current collecting layer to prepare a laminate in which the surface of the first composite layer has a convex shape; and stacking the adhesive layer of the first current collecting layer on the first composite layer of the laminate, followed by pressing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-080519 Summary of the Invention [Problem to be solved by the invention]

[0005] According to the investigations of the present inventors, it has become clear that when a structure having a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer is pressed in the manufacturing process of an all-solid-state battery, elongation of the positive electrode current collector layer, the positive electrode active material layer, the negative electrode active material layer, or the negative electrode current collector layer occurs, and the dimensional stability of the all-solid-state battery may be reduced.

[0006] The present invention provides an all-solid-state battery with improved dimensional stability and a method for producing an all-solid-state battery with which an all-solid-state battery with improved dimensional stability can be obtained. [Means for solving the problem]

[0007] The present inventors have conducted extensive research to solve the above-mentioned problems, and as a result, have found that an all-solid-state battery having a laminate structure that includes a positive electrode current collector layer (A), a positive electrode active material layer (B), a solid electrolyte layer (C), a negative electrode active material layer (D), and a negative electrode current collector layer (E) in this order, and further includes an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E), can have improved dimensional stability, thereby completing the present invention.

[0008] According to the present invention, there are provided the following all-solid-state battery and method for manufacturing the all-solid-state battery.

[0009] [1] An all-solid-state battery comprising a laminated structure having, in this order, a positive electrode current collector layer (A), a positive electrode active material layer (B), a solid electrolyte layer (C), a negative electrode active material layer (D), and a negative electrode current collector layer (E), and further having an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E). [2] The all-solid-state battery according to [1], wherein the insulating member is in contact with a side surface of the positive electrode current collector layer (A) and a side surface of the positive electrode active material layer (B). [3] The all-solid-state battery according to [1] or [2], wherein the insulating member covers all of the side surfaces of the positive electrode current collector layer (A) and the positive electrode active material layer (B). [4] The all-solid-state battery according to any one of [1] to [3], wherein the insulating member is in contact with a side surface of the negative electrode active material layer (D) and a side surface of the negative electrode current collector layer (E). [5] The all-solid-state battery according to any one of [1] to [4], wherein the insulating member is further in contact with a side surface of the solid electrolyte layer (C). [6] The all-solid-state battery according to any one of [1] to [5], wherein the insulating member covers all of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), a side surface of the solid electrolyte layer (C), a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E). [7] The all-solid-state battery according to any one of [1] to [6], wherein a surface of the positive electrode active material layer (B) on the side of the solid electrolyte layer (C) is smaller than a surface of the solid electrolyte layer (C) on the side of the positive electrode active material layer (B). [8] The all-solid-state battery according to any one of [1] to [7], wherein all surfaces of the positive electrode active material layer (B) are covered with the positive electrode current collector layer (A), the solid electrolyte layer (C), and the insulating member. [9] The all-solid-state battery according to any one of [1] to [8], wherein the laminate structure further includes, on the side of the negative electrode current collector layer (E) opposite to the negative electrode active material layer (D'), a solid electrolyte layer (C'), a positive electrode active material layer (B'), and a positive electrode current collector layer (A'), in this order.

[10] The all-solid-state battery according to [9], wherein the electrode surface of the positive electrode active material layer (B) and the electrode surface of the positive electrode active material layer (B') coincide with each other when viewed in a direction perpendicular to the electrode surface of the positive electrode active material layer (B).

[11] The all-solid-state battery according to any one of [1] to [8], wherein the laminate structure further includes a positive electrode active material layer (B"), a solid electrolyte layer (C"), a negative electrode active material layer (D"), and a negative electrode current collector layer (E"), in this order, on the side of the positive electrode current collector layer (A) opposite to the positive electrode active material layer (B).

[12] The all-solid-state battery according to

[11] , wherein the electrode surface of the negative electrode active material layer (D) coincides with the electrode surface of the negative electrode active material layer (D'') when viewed in a direction perpendicular to the electrode surface of the negative electrode active material layer (D).

[13] The all-solid-state battery according to any one of [1] to

[12] , wherein the positive electrode current collector layer (A) contains one or more materials selected from the group consisting of aluminum, stainless steel, nickel, titanium, and alloys thereof.

[14] The all-solid-state battery according to any one of [1] to

[13] , wherein the positive electrode active material layer (B) contains one or more positive electrode active materials selected from the group consisting of composite oxides of lithium and transition metals, transition metal sulfides, transition metal oxides, and olivine-type lithium phosphates.

[15] The all-solid-state battery according to any one of [1] to

[14] , wherein the insulating member contains one or more materials selected from the group consisting of a resin-based insulating material, a glass fiber-based insulating material, a butyl rubber-based insulating material, and a material containing an insulating metal oxide.

[16] The all-solid-state battery according to any one of [1] to

[15] , comprising two or more of the laminated structures.

[17] A manufacturing method for manufacturing the all-solid-state battery according to any one of [1] to

[16] , preparing a laminated structure having the positive electrode current collector layer (A), the positive electrode active material layer (B), the solid electrolyte layer (C), the negative electrode active material layer (D), and the negative electrode current collector layer (E) in this order, and further having an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E); pressing the laminated structure; A method for manufacturing an all-solid-state battery, comprising: [Effects of the Invention]

[0010] According to the present invention, it is possible to provide an all-solid-state battery with improved dimensional stability and a method for producing an all-solid-state battery that can obtain an all-solid-state battery with improved dimensional stability. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 2] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 3]FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 4] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 5] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 6] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 7] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 8] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 9] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 10] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 11] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. [Figure 12] FIG. 1 is a schematic cross-sectional view illustrating an example of an all-solid-state battery according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. To avoid complexity, when there are multiple identical components in the same drawing, only one of them may be labeled with a symbol, and not all of them. The drawings are for illustrative purposes only, and the shapes and dimensional ratios of the components in the drawings do not necessarily correspond to the actual products.

[0013] In this embodiment, "A to B" indicating a numerical range means A or more and B or less unless otherwise specified.

[0014] <All-solid-state battery> The all-solid-state battery of this embodiment includes a laminated structure having a positive electrode current collector layer (A), a positive electrode active material layer (B), a solid electrolyte layer (C), a negative electrode active material layer (D), and a negative electrode current collector layer (E) in this order, and further having an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E).

[0015] According to the investigations of the present inventors, it has become clear that when a structure having a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer is pressed in the manufacturing process of an all-solid-state battery, elongation of the positive electrode current collector layer, the positive electrode active material layer, the negative electrode active material layer, or the negative electrode current collector layer occurs, and the dimensional stability of the all-solid-state battery may be reduced.

[0016] As a result of further investigations, the present inventors have found that the occurrence of elongation during pressing can be suppressed by arranging an insulating member on the side surface of the positive electrode current collector layer, positive electrode active material layer, negative electrode active material layer, or negative electrode current collector layer, which elongate when the structure is pressed. In particular, the inventors have found that by arranging an insulating member on the side surface of the positive electrode current collector layer and positive electrode active material layer, or the side surface of the negative electrode active material layer and negative electrode current collector layer, the dimensions of the positive electrode (negative electrode) current collector layer and the positive electrode (negative electrode) active material layer can be made uniform, thereby improving dimensional stability, even if the elongation characteristics of the positive electrode (negative electrode) current collector layer and the positive electrode (negative electrode) active material layer differ.

[0017] Based on the above findings, the present inventors have conducted further studies and found that the dimensional stability of an all-solid-state battery including a laminate structure having a positive electrode current collector layer (A), a positive electrode active material layer (B), a solid electrolyte layer (C), a negative electrode active material layer (D), and a negative electrode current collector layer (E) in this order can be improved by further including an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A) and a side surface of the positive electrode active material layer (B) and a side surface of the negative electrode active material layer (D) and a side surface of the negative electrode current collector layer (E), thereby completing the present invention.

[0018] FIG. 1 is a schematic cross-sectional view showing an example of the all-solid-state battery according to the present embodiment. In the all-solid-state battery of this embodiment, the insulating member 10 contacts the side surface of the positive electrode current collector layer (A) and the side surface of the positive electrode active material layer (B).

[0019] In the all-solid-state battery of this embodiment, the insulating member 10 covers at least a part of each of the side surfaces of the positive electrode current collector layer (A) and the positive electrode active material layer (B). This makes it possible to further suppress elongation of the positive electrode current collector layer (A) and the positive electrode active material layer (B) when pressed, and thus makes it possible to further improve dimensional stability even when the positive electrode current collector layer (A), the positive electrode active material layer (B), or both, contain a material that is easily elongated when pressure is applied.

[0020] In this embodiment, from the viewpoint of further improving dimensional stability, the area of ​​the side surface of the positive electrode current collector layer (A) covered with the insulating member 10 is preferably 10% or more, more preferably 30% or more, even more preferably 50% or more, even more preferably 70% or more, and even more preferably 90% or more, when the total area of ​​the side surface of the positive electrode current collector layer (A) is taken as 100%. There is no particular upper limit to the area of ​​the side surface of the positive electrode current collector layer (A) covered with the insulating member 10 in this embodiment, but it may be, for example, 100% or less.

[0021] In this embodiment, from the viewpoint of further improving dimensional stability, the area of ​​the side surface of the positive electrode current collector layer (A) covered with the insulating member 10 is preferably 10% or more and 100% or less, more preferably 30% or more and 100% or less, even more preferably 50% or more and 100% or less, even more preferably 70% or more and 100% or less, and even more preferably 90% or more and 100% or less, when the total area of ​​the side surface of the positive electrode current collector layer (A) is taken as 100%.

[0022] In this embodiment, from the viewpoint of further improving dimensional stability, the area of ​​the side surface of the positive electrode active material layer (B) covered with the insulating member 10 is preferably 10% or more, more preferably 30% or more, even more preferably 50% or more, even more preferably 70% or more, and even more preferably 90% or more, when the total area of ​​the side surface of the positive electrode active material layer (B) is taken as 100%. The upper limit of the area of ​​the side surface of the positive electrode active material layer (B) covered with the insulating member 10 in this embodiment is not particularly limited, but may be, for example, 100% or less.

[0023] In this embodiment, from the viewpoint of further improving dimensional stability, when the total area of ​​the side surfaces of the positive electrode active material layer (B) is taken as 100%, the area of ​​the side surfaces of the positive electrode active material layer (B) covered with the insulating member 10 is preferably 10% or more and 100% or less, more preferably 30% or more and 100% or less, even more preferably 50% or more and 100% or less, even more preferably 70% or more and 100% or less, and even more preferably 90% or more and 100% or less.

[0024] FIG. 2 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surfaces of the positive electrode current collector layer (A) and the positive electrode active material layer (B).

[0025] In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surfaces of the positive electrode current collector layer (A) and the positive electrode active material layer (B), and therefore, elongation of the positive electrode current collector layer (A) and the positive electrode active material layer (B) during pressing can be further suppressed, and dimensional stability can be further improved even when the positive electrode current collector layer (A), the positive electrode active material layer (B), or both, contain a material that is easily elongated by pressure.

[0026] FIG. 3 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the insulating member 10 contacts the side surface of the negative electrode active material layer (D) and the side surface of the negative electrode current collector layer (E).

[0027] In the all-solid-state battery of this embodiment, the insulating member 10 covers at least a part of each of the side surfaces of the negative electrode active material layer (D) and the negative electrode current collector layer (E). This makes it possible to further suppress elongation of the negative electrode active material layer (D) and the negative electrode current collector layer (E) during pressing, and thus makes it possible to further improve dimensional stability even when the negative electrode active material layer (D), the negative electrode current collector layer (E), or both, contain a material that is easily elongated by pressure.

[0028] In this embodiment, from the viewpoint of further improving dimensional stability, the area of ​​the side surface of the negative electrode active material layer (D) covered with the insulating member 10 is preferably 10% or more, more preferably 30% or more, even more preferably 50% or more, even more preferably 70% or more, and even more preferably 90% or more, when the total area of ​​the side surface of the negative electrode active material layer (D) is taken as 100%. The upper limit of the area of ​​the side surface of the negative electrode active material layer (D) covered with the insulating member 10 in this embodiment is not particularly limited, but may be, for example, 100% or less.

[0029] In this embodiment, from the viewpoint of further improving dimensional stability, the area of ​​the side surface of the negative electrode active material layer (D) covered with the insulating member 10 is preferably 10% or more and 100% or less, more preferably 30% or more and 100% or less, even more preferably 50% or more and 100% or less, even more preferably 70% or more and 100% or less, and even more preferably 90% or more and 100% or less, when the total area of ​​the side surfaces of the negative electrode active material layer (D) is taken as 100%.

[0030] In this embodiment, from the viewpoint of further improving dimensional stability, the area of ​​the side surface of the negative electrode current collector layer (E) covered with the insulating member 10 is preferably 10% or more, more preferably 30% or more, even more preferably 50% or more, even more preferably 70% or more, and even more preferably 90% or more, when the total area of ​​the side surface of the negative electrode current collector layer (E) is taken as 100%. There is no particular upper limit to the area of ​​the side surface of the negative electrode current collector layer (E) covered with the insulating member 10 in this embodiment, but it may be, for example, 100% or less.

[0031] In this embodiment, from the viewpoint of further improving dimensional stability, the area of ​​the side surface of the negative electrode current collector layer (E) covered with the insulating member 10 is preferably 10% or more and 100% or less, more preferably 30% or more and 100% or less, even more preferably 50% or more and 100% or less, even more preferably 70% or more and 100% or less, and even more preferably 90% or more and 100% or less, when the total area of ​​the side surfaces of the negative electrode current collector layer (E) is taken as 100%.

[0032] FIG. 4 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the insulating member 10 is further in contact with the side surface of the solid electrolyte layer (C).

[0033] In the all-solid-state battery of this embodiment, the insulating member 10 covers at least a part of the side surface of the solid electrolyte layer (C), and therefore, protrusion of the solid electrolyte layer (C) outside the positive electrode active material layer (B) or the negative electrode active material layer (D) during pressing can be further suppressed, and the occurrence of a short circuit due to the edge portion of the positive electrode active material layer (B) or the negative electrode active material layer (D) breaking through the protruding solid electrolyte layer (C) can be further suppressed.

[0034] In this embodiment, from the viewpoint of further suppressing the occurrence of short circuits, the area of ​​the side surface of the solid electrolyte layer (C) covered with the insulating member 10 is preferably 10% or more, more preferably 30% or more, even more preferably 50% or more, even more preferably 70% or more, and even more preferably 90% or more, when the total area of ​​the side surface of the solid electrolyte layer (C) is taken as 100%. The upper limit of the area of ​​the side surface of the solid electrolyte layer (C) covered with the insulating member 10 in this embodiment is not particularly limited, but may be, for example, 100% or less.

[0035] In this embodiment, from the viewpoint of further suppressing the occurrence of a short circuit, when the total area of ​​the side surfaces of the solid electrolyte layer (C) is taken as 100%, the area of ​​the side surfaces of the solid electrolyte layer (C) covered with the insulating member 10 is preferably 10% or more and 100% or less, more preferably 30% or more and 100% or less, even more preferably 50% or more and 100% or less, even more preferably 70% or more and 100% or less, and even more preferably 90% or more and 100% or less.

[0036] FIG. 5 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surface of the positive electrode current collector layer (A), the side surface of the positive electrode active material layer (B), the side surface of the solid electrolyte layer (C), the side surface of the negative electrode active material layer (D), and the side surface of the negative electrode current collector layer (E).

[0037] In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surfaces of the positive electrode current collector layer (A), the positive electrode active material layer (B), the negative electrode active material layer (D), and the negative electrode current collector layer (E). This makes it possible to further suppress elongation of the positive electrode current collector layer (A), the positive electrode active material layer (B), the negative electrode active material layer (D), and the negative electrode current collector layer (E) when pressed. This further improves dimensional stability even when any of the positive electrode current collector layer (A), the positive electrode active material layer (B), the negative electrode active material layer (D), and the negative electrode current collector layer (E) contains a material that is easily elongated by pressure.

[0038] In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surfaces of the solid electrolyte layer (C), which further prevents the solid electrolyte layer (C) from protruding outward from the positive electrode active material layer (B) or the negative electrode active material layer (D) during pressing, and further prevents the occurrence of a short circuit caused by the edge portion of the positive electrode active material layer (B) or the negative electrode active material layer (D) breaking through the protruding solid electrolyte layer (C).

[0039] FIG. 6 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the surface of the positive electrode active material layer (B) on the solid electrolyte layer (C) side is smaller than the surface of the solid electrolyte layer (C) on the positive electrode active material layer (B) side.

[0040] In the all-solid-state battery of this embodiment, the surface of the positive electrode active material layer (B) facing the solid electrolyte layer (C) is smaller than the surface of the solid electrolyte layer (C) facing the positive electrode active material layer (B). This makes it possible to further suppress bending of the outer periphery of the positive electrode active material layer (B) during pressing, and to further suppress the occurrence of a short circuit due to contact between the bent positive electrode active material layer (B) and the negative electrode active material layer (D) or the negative electrode current collector layer (E).

[0041] In the all-solid-state battery of this embodiment, the surface of the positive electrode active material layer (B) facing the solid electrolyte layer (C) is smaller than the surface of the solid electrolyte layer (C) facing the positive electrode active material layer (B). This makes it possible to further suppress the occurrence of a short circuit caused by some of the lithium ions in the positive electrode active material layer (B) being unable to reach the negative electrode active material layer (D) during charging.

[0042] In the all-solid-state battery of this embodiment, from the viewpoint of further suppressing the occurrence of a short circuit, preferably, all surfaces of the positive electrode active material layer (B) are covered with the positive electrode current collector layer (A), the solid electrolyte layer (C), and the insulating member 10. This makes it possible to further suppress bending of the outer periphery of the positive electrode active material layer (B) during pressing and protrusion of the positive electrode active material layer (B) outside the solid electrolyte layer (C) during pressing, and to further suppress the occurrence of a short circuit due to contact between the bent positive electrode active material layer (B) or the protruding positive electrode active material layer (B) and the negative electrode active material layer (D) or the negative electrode current collector layer (E).

[0043] FIG. 7 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the surface of the positive electrode active material layer (B) facing the solid electrolyte layer (C) is smaller than the surface of the solid electrolyte layer (C) facing the positive electrode active material layer (B), and the insulating member 10 covers all of the side surfaces of the positive electrode current collector layer (A), the positive electrode active material layer (B), the solid electrolyte layer (C), the negative electrode active material layer (D), and the negative electrode current collector layer (E).

[0044] The all-solid-state battery of this embodiment is an all-solid-state battery of a more preferable aspect than the all-solid-state battery of the embodiment shown in FIG. In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surfaces of the positive electrode current collector layer (A), the positive electrode active material layer (B), the solid electrolyte layer (C), the negative electrode active material layer (D), and the negative electrode current collector layer (E), and therefore, the dimensional stability can be further improved and the occurrence of a short circuit can be further suppressed.

[0045] FIG. 8 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the laminate structure further includes, in this order, a negative electrode active material layer (D'), a solid electrolyte layer (C'), a positive electrode active material layer (B'), and a positive electrode current collector layer (A') on the side of the negative electrode current collector layer (E) opposite to the negative electrode active material layer (D) side.

[0046] In the all-solid-state battery of this embodiment, the negative electrode active material layers (D) and (D'), the solid electrolyte layers (C) and (C'), the positive electrode active material layers (B) and (B'), and the positive electrode current collector layers (A) and (A') are arranged symmetrically in the stacking direction around the negative electrode current collector layer (E), so that the materials at the top and bottom of the stacked structure are uniform during pressing. This makes it possible to further suppress distortion of the entire stacked structure during pressing, thereby further suppressing warping and distortion of each layer and improving dimensional stability.

[0047] In the all-solid-state battery of this embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the positive electrode current collector layer (A) and the electrode surface of the positive electrode current collector layer (A') preferably coincide with each other when viewed in the direction perpendicular to the electrode surface of the positive electrode current collector layer (A).

[0048] In the all-solid-state battery of this embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the positive electrode active material layer (B) and the electrode surface of the positive electrode active material layer (B') preferably coincide with each other when viewed in a direction perpendicular to the electrode surface of the positive electrode active material layer (B).

[0049] In the all-solid-state battery of the present embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the solid electrolyte layer (C) and the electrode surface of the solid electrolyte layer (C') preferably coincide with each other when viewed in the direction perpendicular to the electrode surface of the solid electrolyte layer (C).

[0050] In the all-solid-state battery of this embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the negative electrode active material layer (D) and the electrode surface of the negative electrode active material layer (D') preferably coincide with each other when viewed in the direction perpendicular to the electrode surface of the negative electrode active material layer (D).

[0051] FIG. 9 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the laminate structure further includes an anode active material layer (D'), a solid electrolyte layer (C'), a cathode active material layer (B'), and a cathode current collector layer (A') in this order on the side of the anode current collector layer (E) opposite to the anode active material layer (D) side, and the surface of the cathode active material layer (B) on the solid electrolyte layer (C) side is smaller than the surface of the solid electrolyte layer (C) on the cathode active material layer (B) side, and the solid electrolyte layer ( The surface of the solid electrolyte layer (C') on the positive electrode active material layer (B') side is smaller than the surface of the solid electrolyte layer (C') on the positive electrode active material layer (B') side, and the insulating member 10 covers all of the side surface of the positive electrode current collector layer (A), the side surface of the positive electrode active material layer (B), the side surface of the solid electrolyte layer (C), the side surface of the negative electrode active material layer (D), the side surface of the negative electrode current collector layer (E), the side surface of the negative electrode active material layer (D'), the side surface of the solid electrolyte layer (C'), the side surface of the positive electrode active material layer (B') and the side surface of the positive electrode current collector layer (A').

[0052] The all-solid-state battery of this embodiment is an all-solid-state battery of a more preferable aspect than the all-solid-state battery of the embodiment shown in FIG. In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surface of the positive electrode current collector layer (A), the side surface of the positive electrode active material layer (B), the side surface of the solid electrolyte layer (C), the side surface of the negative electrode active material layer (D), the side surface of the negative electrode current collector layer (E), the side surface of the negative electrode active material layer (D'), the side surface of the solid electrolyte layer (C'), the side surface of the positive electrode active material layer (B'), and the side surface of the positive electrode current collector layer (A'), and therefore, the dimensional stability can be further improved and the occurrence of a short circuit can be further suppressed. In the all-solid-state battery of this embodiment, the surface of the positive electrode active material layer (B) facing the solid electrolyte layer (C) is smaller than the surface of the solid electrolyte layer (C) facing the positive electrode active material layer (B), and the surface of the positive electrode active material layer (B') facing the solid electrolyte layer (C') is smaller than the surface of the solid electrolyte layer (C') facing the positive electrode active material layer (B'), and therefore the occurrence of a short circuit can be further suppressed.

[0053] FIG. 10 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the laminate structure further includes a positive electrode active material layer (B"), a solid electrolyte layer (C"), a negative electrode active material layer (D"), and a negative electrode current collector layer (E") in this order on the side of the positive electrode current collector layer (A) opposite to the positive electrode active material layer (B) side.

[0054] In the all-solid-state battery of this embodiment, the positive electrode active material layers (B) and (B"), the solid electrolyte layers (C) and (C"), the negative electrode active material layers (D) and (D"), and the negative electrode current collector layers (E) and (E") are arranged symmetrically in the stacking direction with the positive electrode current collector layer (A) at the center, so that the materials at the top and bottom of the stacked structure are uniform during pressing. This makes it possible to further suppress distortion of the entire stacked structure during pressing, thereby further suppressing warpage and distortion of each layer and improving dimensional stability.

[0055] In the all-solid-state battery of this embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the positive electrode active material layer (B) and the electrode surface of the positive electrode active material layer (B'') preferably coincide with each other when viewed in a direction perpendicular to the electrode surface of the positive electrode active material layer (B).

[0056] In the all-solid-state battery of this embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the solid electrolyte layer (C) and the electrode surface of the solid electrolyte layer (C'') preferably coincide with each other when viewed in a direction perpendicular to the electrode surface of the solid electrolyte layer (C).

[0057] In the all-solid-state battery of this embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the negative electrode active material layer (D) and the electrode surface of the negative electrode active material layer (D'') preferably coincide with each other when viewed in the direction perpendicular to the electrode surface of the negative electrode active material layer (D).

[0058] In the all-solid-state battery of this embodiment, from the viewpoint of further improving dimensional stability and energy density, the electrode surface of the negative electrode current collector layer (E) and the electrode surface of the negative electrode current collector layer (E") preferably coincide with each other when viewed in a direction perpendicular to the electrode surface of the negative electrode current collector layer (E).

[0059] FIG. 11 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. In the all-solid-state battery of this embodiment, the laminate structure further includes a cathode active material layer (B"), a solid electrolyte layer (C"), an anode active material layer (D"), and an anode current collector layer (E") in this order on the side of the cathode current collector layer (A) opposite to the cathode active material layer (B), and the surface of the cathode active material layer (B) on the solid electrolyte layer (C) side is smaller than the surface of the solid electrolyte layer (C) on the cathode active material layer (B), and the solid electrolyte layer (C") of the cathode active material layer (B") is The surface of the insulating member 10 on the positive electrode current collector layer (A'') side is smaller than the surface of the solid electrolyte layer (C'') on the positive electrode active material layer (B'') side, and the insulating member 10 covers all of the side surface of the positive electrode current collector layer (A), the side surface of the positive electrode active material layer (B), the side surface of the solid electrolyte layer (C), the side surface of the negative electrode active material layer (D), the side surface of the negative electrode current collector layer (E), the side surface of the positive electrode active material layer (B''), the side surface of the solid electrolyte layer (C''), the side surface of the negative electrode active material layer (D'') and the side surface of the negative electrode current collector layer (E'').

[0060] The all-solid-state battery of this embodiment is an all-solid-state battery of a more preferable aspect than the all-solid-state battery of the embodiment shown in FIG. In the all-solid-state battery of this embodiment, the insulating member 10 covers all of the side surface of the positive electrode current collector layer (A), the side surface of the positive electrode active material layer (B), the side surface of the solid electrolyte layer (C), the side surface of the negative electrode active material layer (D), the side surface of the negative electrode current collector layer (E), the side surface of the positive electrode active material layer (B"), the side surface of the solid electrolyte layer (C"), the side surface of the negative electrode active material layer (D"), and the side surface of the negative electrode current collector layer (E"), thereby further improving dimensional stability and further suppressing the occurrence of short circuits. In the all-solid-state battery of this embodiment, the surface of the positive electrode active material layer (B) facing the solid electrolyte layer (C) is smaller than the surface of the solid electrolyte layer (C) facing the positive electrode active material layer (B), and the surface of the positive electrode active material layer (B") facing the solid electrolyte layer (C") is smaller than the surface of the solid electrolyte layer (C") facing the positive electrode active material layer (B"), and therefore the occurrence of a short circuit can be further suppressed.

[0061] FIG. 12 is a schematic cross-sectional view showing an example of the all-solid-state battery according to this embodiment. The all-solid-state battery of this embodiment includes two or more laminate structures.

[0062] The all-solid-state battery of this embodiment may further include one or more layers selected from the group consisting of a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer between the laminate structures.

[0063] <Positive electrode current collector layer (A)> The positive electrode current collector layer (A) of this embodiment preferably contains one or more materials selected from the group consisting of aluminum, stainless steel, nickel, titanium, and alloys thereof.

[0064] The shape of the positive electrode current collector layer (A) of this embodiment is not particularly limited, and may be, for example, a foil, a plate, or a mesh. The thickness of the positive electrode current collector layer (A) of this embodiment is not particularly limited, and is, for example, 1 μm or more and 50 μm or less. In the case of the embodiment shown in FIG. 8, from the viewpoint of further improving dimensional stability, it is preferable that the thickness of the positive electrode current collector layer (A) and the thickness of the positive electrode current collector layer (A') are approximately the same.

[0065] <Cathode active material layer (B)> The positive electrode active material layer (B) of this embodiment is preferably made of a composite oxide of lithium and a transition metal such as lithium-nickel composite oxide, lithium-cobalt composite oxide, lithium-manganese composite oxide, lithium-nickel-manganese composite oxide, lithium-nickel-cobalt composite oxide, lithium-nickel-aluminum composite oxide, lithium-nickel-cobalt-aluminum composite oxide, lithium-nickel-manganese-cobalt composite oxide, lithium-nickel-manganese-aluminum composite oxide, or lithium-nickel-cobalt-manganese-aluminum composite oxide; a transition metal sulfide such as TiS, FeS, or MoS; MnO, VO, or VO 13 and transition metal oxides such as TiO2; and olivine-type lithium phosphate.

[0066] The content of the positive electrode active material in the positive electrode active material layer (B) of this embodiment is preferably 50 parts by mass or more and 100 parts by mass or less, more preferably 70 parts by mass or more and 95 parts by mass or less, and even more preferably 80 parts by mass or more and 90 parts by mass or less, when the total amount of the positive electrode active material layer (B) is 100 parts by mass.

[0067] The positive electrode active material layer (B) of this embodiment preferably contains a conductive auxiliary. Examples of the conductive additive include carbon black, natural graphite, artificial graphite, and carbon fibers such as carbon nanotubes. The graphite may be, for example, flake graphite or spherical graphite. These may be used alone or in combination of two or more.

[0068] The content of the conductive additive in the positive electrode active material layer (B) of this embodiment is preferably 0.01 parts by mass or more and 15 parts by mass or less, more preferably 0.05 parts by mass or more and 10 parts by mass or less, and even more preferably 0.1 parts by mass or more and 8 parts by mass or less, when the total amount of the positive electrode active material layer (B) is taken as 100 parts by mass.

[0069] The positive electrode active material layer (B) of this embodiment preferably contains a binder resin. Examples of binder resins include polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF).

[0070] The content of the binder resin in the positive electrode active material layer (B) of this embodiment is preferably 0.01 parts by mass or more and 15 parts by mass or less, and more preferably 0.1 parts by mass or more and 10 parts by mass or less, when the total amount of the positive electrode active material layer (B) is 100 parts by mass.

[0071] The positive electrode active material layer (B) of this embodiment preferably contains a solid electrolyte. The type of solid electrolyte is not particularly limited, and may include one or more solid electrolyte materials selected from the group consisting of oxide-based solid electrolyte materials, sulfide-based solid electrolyte materials, polymer-based solid electrolyte materials, and halogen-based solid electrolyte materials.

[0072] The content of the solid electrolyte in the positive electrode active material layer (B) of this embodiment is preferably 1 part by mass or more and 50 parts by mass or less, and more preferably 3 parts by mass or more and 30 parts by mass or less, when the total amount of the positive electrode active material layer (B) is 100 parts by mass.

[0073] The thickness of the positive electrode active material layer (B) of this embodiment is preferably 1 μm or more and 300 μm or less, more preferably 5 μm or more and 200 μm or less, and even more preferably 10 μm or more and 150 μm or less. In the case of the embodiment shown in Fig. 8 or the embodiment shown in Fig. 10, from the viewpoint of further improving dimensional stability, it is preferable that the thickness of the positive electrode active material layer (B) is approximately the same as the thickness of the positive electrode active material layer (B') or the positive electrode active material layer (B'').

[0074] <Solid electrolyte layer (C)> The solid electrolyte layer (C) of the present embodiment preferably contains one or more solid electrolyte materials selected from the group consisting of oxide-based solid electrolyte materials, sulfide-based solid electrolyte materials, polymer-based solid electrolyte materials, and halogen-based solid electrolyte materials.

[0075] Examples of oxide-based solid electrolyte materials include NASICON-type solid electrolyte materials such as LiTi2(PO4)3, LiZr2(PO4)3, and LiGe2(PO4)3; 0.5+x Li 0.5-3x ) Perovskite-type solid electrolyte materials such as TiO3; Li2O-P2O5 materials, Li2O-P2O5-Li3N materials, etc. These may be used alone or in combination of two or more.

[0076] Examples of sulfide-based solid electrolyte materials include Li2S-P2S5 materials, Li2S-SiS2 materials, Li2S-GeS2 materials, Li2S-Al2S3 materials, Li2S-SiS2-Li3PO4 materials, Li2S-P2S5-GeS2 materials, Li2S-Li2O-P2S5-SiS2 materials, Li2S-GeS2-P2S5-SiS2 materials, Li2S-SnS2-P2S5-SiS2 materials, Li2S-P2S5-Li3N materials, and Li2S 2+X-P4S3 material, Li2S-P2S5-P4S3 material, etc. These may be used alone or in combination of two or more.

[0077] Examples of polymer-based solid electrolyte materials include polyether-based electrolyte materials such as polyethylene oxide, polypropylene oxide, ethylene oxide-propylene copolymer, and dimethylsiloxane-ethylene oxide copolymer; gel polymer electrolyte materials such as polyacrylonitrile, polyvinylidene fluoride, and vinylidene fluoride-hexafluoropropylene polymer; and polymer solid electrolyte materials using hyperbranched polymers. These may be used alone or in combination of two or more.

[0078] Examples of halogen-based solid electrolyte materials include LiTaOCl4, LiNbOCl4, and LiTa 0.9 Nb 0.1 Metal oxyhalide compounds such as OCl4, metal sulfur halide compounds such as Li2S-P2S5-LiI material, Li2S-P2S5-LiBr material, etc. These may be used alone or in combination of two or more.

[0079] The content of the solid electrolyte in the solid electrolyte layer (C) of the present embodiment is preferably 80 parts by mass or more and 100 parts by mass or less, and more preferably 90 parts by mass or more and 100 parts by mass or less, when the total amount of the solid electrolyte layer (C) is taken as 100 parts by mass.

[0080] The thickness of the solid electrolyte layer (C) of this embodiment is preferably 1 μm or more and 150 μm or less, more preferably 5 μm or more and 100 μm or less, and even more preferably 10 μm or more and 80 μm or less. In the case of the embodiment shown in Fig. 8 or the embodiment shown in Fig. 10, from the viewpoint of further improving dimensional stability, it is preferable that the thickness of the solid electrolyte layer (C) is approximately the same as the thickness of the solid electrolyte layer (C') or the solid electrolyte layer (C'').

[0081] <Negative electrode active material layer (D)> The negative electrode active material layer (D) of the present embodiment preferably contains one or more negative electrode active materials selected from the group consisting of carbon materials such as graphite, amorphous carbon, diamond-like carbon, fullerene, carbon nanotube, and carbon nanohorn that occlude lithium; lithium-based metal materials such as lithium metal and lithium alloy; Si-based materials such as Si, SiO2, SiO x x (0 < x ≤ 2), Si-containing composite materials, etc.; and conductive polymer materials such as polyacene, polyacetylene, and polypyrrole. From the viewpoint of further improving dimensional stability, it more preferably contains a lithium-based metal material.

[0082] The negative electrode active material layer (D) of the present embodiment may contain a binder. Examples of the binder include fluororesins such as polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), and polyvinyl fluoride (PVF); conductive polymers such as polyanilines, polythiophenes, polyacetylenes, and polypyrroles; synthetic rubbers such as styrene-butadiene rubber (SBR), butadiene rubber (BR), chloroprene rubber (CR), isoprene rubber (IR), and acrylonitrile-butadiene rubber (NBR); and polysaccharides such as carboxymethyl cellulose (CMC), xanthan gum, guar gum, and pectin. One of these may be used alone, or two or more of them may be used in combination.

[0083] The negative electrode active material layer (D) of the present embodiment may contain a conductive assistant. Examples of the conductive assistant include carbon fibers such as carbon nanofibers; carbon blacks such as acetylene black and ketjen black; and carbon materials such as activated carbon, mesoporous carbon, fullerenes, and carbon nanotubes. One of these may be used alone, or two or more of them may be used in combination.

[0084] The content of the negative electrode active material in the negative electrode active material layer (D) of this embodiment is preferably 70 parts by mass or more and 100 parts by mass or less, more preferably 80 parts by mass or more and 100 parts by mass or less, and even more preferably 90 parts by mass or more and 100 parts by mass or less, when the total amount of the negative electrode active material layer (D) is taken as 100 parts by mass.

[0085] The thickness of the negative electrode active material layer (D) in this embodiment is preferably 0.1 μm or more and 150 μm or less, more preferably 0.5 μm or more and 100 μm or less, and even more preferably 1 μm or more and 80 μm or less. In the case of the embodiment shown in Fig. 8 or the embodiment shown in Fig. 10, from the viewpoint of further improving dimensional stability, it is preferable that the thickness of the negative electrode active material layer (D) is approximately the same as the thickness of the negative electrode active material layer (D') or the negative electrode active material layer (D").

[0086] <Negative electrode current collector layer (E)> The negative electrode current collector layer (E) of this embodiment preferably contains one or more materials selected from the group consisting of copper, stainless steel, nickel, titanium, or alloys thereof.

[0087] The shape of the negative electrode current collector layer (E) of this embodiment is not particularly limited, and may be, for example, a foil, a plate, or a mesh. The thickness of the negative electrode current collector layer (E) of this embodiment is not particularly limited, and is, for example, 1 μm or more and 50 μm or less. In the embodiment shown in FIG. 10, from the viewpoint of further improving dimensional stability, it is preferable that the thickness of the negative electrode current collector layer (E) and the thickness of the negative electrode current collector layer (E") are approximately the same.

[0088] <Insulating member 10> In order to further improve dimensional stability, the insulating member 10 of this embodiment preferably contains one or more materials selected from the group consisting of resin-based insulating materials, glass fiber-based insulating materials, butyl rubber-based insulating materials, and materials containing insulating metal oxides.

[0089] <Manufacturing method for all-solid-state batteries> The manufacturing method of the all-solid-state battery of this embodiment is a manufacturing method for manufacturing the all-solid-state battery of this embodiment, preparing a laminated structure having a positive electrode current collector layer (A), a positive electrode active material layer (B), a solid electrolyte layer (C), a negative electrode active material layer (D), and a negative electrode current collector layer (E) in this order, and further having an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E); pressing the laminated structure; Includes.

[0090] In the method for producing an all-solid-state battery of this embodiment, the laminate structure is pressed with an insulating member disposed on at least one of the side surfaces of the positive electrode current collector layer (A) and the positive electrode active material layer (B) and the side surfaces of the negative electrode active material layer (D) and the negative electrode current collector layer (E), so that elongation of the current collector layer and the active material layer having an insulating member disposed on their side surfaces can be suppressed. Furthermore, even if the current collector layer and the active material layer have different elongation characteristics, the dimensions of the current collector layer and the active material layer can be made uniform, thereby improving dimensional stability.

[0091] Although the embodiments of the present invention have been described above, these are merely examples of the present invention, and various other configurations can be adopted. Furthermore, the present invention is not limited to the above-described embodiments, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention. [Explanation of symbols]

[0092] (A) Positive electrode current collector layer (B) Positive electrode active material layer (C) Solid electrolyte layer (D) Negative electrode active material layer (E) Negative electrode current collector layer 10. Insulating material

Claims

1. An all-solid-state battery comprising a laminated structure having, in this order, a positive electrode current collector layer (A), a positive electrode active material layer (B), a solid electrolyte layer (C), a negative electrode active material layer (D), and a negative electrode current collector layer (E), and further having an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E).

2. The all-solid-state battery according to claim 1 , wherein the insulating member is in contact with a side surface of the positive electrode current collector layer (A) and a side surface of the positive electrode active material layer (B).

3. The all-solid-state battery according to claim 1 or 2, wherein the insulating member covers all of the side surfaces of the positive electrode current collector layer (A) and the positive electrode active material layer (B).

4. The all-solid-state battery according to any one of claims 1 to 3, wherein the insulating member is in contact with a side surface of the negative electrode active material layer (D) and a side surface of the negative electrode current collector layer (E).

5. The all-solid-state battery according to any one of claims 1 to 4, wherein the insulating member is further in contact with a side surface of the solid electrolyte layer (C).

6. The all-solid-state battery according to any one of claims 1 to 5, wherein the insulating member covers all of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), a side surface of the solid electrolyte layer (C), a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E).

7. 7. The all-solid-state battery according to claim 1, wherein a surface of the positive electrode active material layer (B) on the solid electrolyte layer (C) side is smaller than a surface of the solid electrolyte layer (C) on the positive electrode active material layer (B) side.

8. 8. The all-solid-state battery according to claim 1, wherein all surfaces of the positive electrode active material layer (B) are covered with the positive electrode current collector layer (A), the solid electrolyte layer (C), and the insulating member.

9. The all-solid-state battery according to any one of claims 1 to 8, wherein the laminate structure further includes an anode active material layer (D'), a solid electrolyte layer (C'), a cathode active material layer (B'), and a cathode current collector layer (A') in this order on a side of the anode current collector layer (E) opposite to the anode active material layer (D).

10. 10. The all-solid-state battery according to claim 9, wherein, when viewed in a direction perpendicular to the electrode surface of the positive electrode active material layer (B), the electrode surface of the positive electrode active material layer (B) and the electrode surface of the positive electrode active material layer (B') coincide with each other.

11. The all-solid-state battery according to any one of claims 1 to 8, wherein the laminate structure further includes a positive electrode active material layer (B"), a solid electrolyte layer (C"), a negative electrode active material layer (D"), and a negative electrode current collector layer (E"), in this order, on a side of the positive electrode current collector layer (A) opposite to a side of the positive electrode active material layer (B).

12. 12. The all-solid-state battery according to claim 11, wherein the electrode surface of the negative electrode active material layer (D) and the electrode surface of the negative electrode active material layer (D") coincide with each other when viewed in a direction perpendicular to the electrode surface of the negative electrode active material layer (D).

13. The all-solid-state battery according to any one of claims 1 to 12, wherein the positive electrode current collector layer (A) contains one or more selected from the group consisting of aluminum, stainless steel, nickel, titanium, and alloys thereof.

14. The all-solid-state battery according to any one of claims 1 to 13, wherein the positive electrode active material layer (B) contains one or more positive electrode active materials selected from the group consisting of composite oxides of lithium and transition metals, transition metal sulfides, transition metal oxides, and olivine-type lithium phosphates.

15. The all-solid-state battery according to any one of claims 1 to 14, wherein the insulating member comprises one or more materials selected from the group consisting of a resin-based insulating material, a glass fiber-based insulating material, a butyl rubber-based insulating material, and a material containing an insulating metal oxide.

16. The all-solid-state battery according to any one of claims 1 to 15, comprising two or more of the laminated structures.

17. A manufacturing method for manufacturing the all-solid-state battery according to any one of claims 1 to 16, preparing a laminated structure having the positive electrode current collector layer (A), the positive electrode active material layer (B), the solid electrolyte layer (C), the negative electrode active material layer (D), and the negative electrode current collector layer (E) in this order, and further having an insulating member in contact with at least one of a side surface of the positive electrode current collector layer (A), a side surface of the positive electrode active material layer (B), and a side surface of the negative electrode active material layer (D), and a side surface of the negative electrode current collector layer (E); pressing the laminated structure; A method for manufacturing an all-solid-state battery, comprising:

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