Electrode stack module

Abstract

This disclosure aims to suppress the breakage of connection points between multiple electrode stacks due to bending. [Solution] The electrode stack module 100 of the present disclosure comprises a plurality of electrode stacks 300, a positive electrode metal vapor-deposited resin layer 610, and a negative electrode metal vapor-deposited resin layer 620, wherein each positive electrode metal foil 310 of the plurality of electrode stacks 300 is in contact with the positive electrode vapor-deposited metal film of the positive electrode metal vapor-deposited resin layer 610, thereby electrically connecting the plurality of positive electrode metal foils 310 in parallel, and each negative electrode metal foil 350 of the plurality of electrode stacks 300 is in contact with the negative electrode vapor-deposited metal film of the negative electrode metal vapor-deposited resin layer 620, thereby electrically connecting the plurality of negative electrode metal foils 350 in parallel, and the positive electrode metal foil 310, the negative electrode metal foil 350, and the resin sealing member 400 seal the positive electrode active material layer 320, the separator layer 330 or solid electrolyte layer, and the negative electrode active material layer 340.

Description

[Technical Field]

[0001] This disclosure relates to an electrode stack module. [Background technology]

[0002] An electrode laminate module is an electrode laminate containing at least a positive electrode metal foil, a positive electrode active material layer, a separator layer or solid electrolyte layer, a negative electrode active material layer, and a negative electrode metal foil in this order, housed in an outer casing or the like.

[0003] In recent years, with the development of portable electronic devices such as mobile phones and the practical application of electric vehicles, there has been a growing demand for small, lightweight, high-capacity, and high-energy-density electrode stack modules. For example, as described in Patent Documents 1 and 2, electrode stack modules comprising multiple electrode stacks connected in parallel are being considered.

[0004] For example, Patent Document 1 discloses a battery characterized in that a series of thin-type batteries, each consisting of a positive electrode active material, a separator, and a negative electrode active material arranged between current collectors on the upper and lower surfaces, with their peripheries sealed and bonded with adhesive, are connected by the adhesive and current collector portions, and at least a portion of the connecting portion of the battery is provided with a notch or recess. According to the battery described in Patent Document 1, it is possible to easily obtain the required battery capacity and to facilitate parallel connection of batteries.

[0005] Furthermore, Patent Document 2 discloses a flexible battery in which a plurality of power generation elements are sealed inside an outer casing, wherein each power generation element has a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, the positive electrode has a positive electrode mixture layer and a sheet-like conductive substrate disposed on the surface of the positive electrode mixture layer, the negative electrode has a negative electrode mixture layer and a sheet-like conductive substrate disposed on the surface of the negative electrode mixture layer, the plurality of power generation elements are arranged on a flexible substrate, and each positive electrode is directly connected to a current collector so that the positive electrodes are connected to each other by the current collector, and each negative electrode is directly connected to a current collector so that the negative electrodes are connected to each other by the current collector, and external connection terminals are connected to each of the current collectors that connect the positive electrodes and the current collectors that connect the negative electrodes. The flexible battery described in Patent Document 2 is said to have reduced internal resistance. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 6-333551 [Patent Document 2] International Publication No. 2024 / 070724 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] In the above-described battery, where multiple electrode stacks are connected in parallel, the battery is used by bending it at the connection points between the multiple electrode stacks. Metal foil is placed at these connection points to connect adjacent electrode stacks to each other. When metal foil is used at such connection points, it is prone to breakage due to metal fatigue caused by repeated bending.

[0008] Therefore, the present disclosure aims to suppress the breakage of connection portions between multiple electrode stacks due to bending. [Means for solving the problem]

[0009] This disclosure aims to achieve the above objectives by the following means:

[0010] (Aspect 1) The device comprises multiple electrode stacks, a positive electrode metal vapor-deposited resin layer, and a negative electrode metal vapor-deposited resin layer. Each of the above-mentioned electrode laminates includes, in this order, at least a positive electrode metal foil, a positive electrode active material layer, a separator layer or solid electrolyte layer, a negative electrode active material layer, and a negative electrode metal foil. Each of the positive electrode metal foils in the above-mentioned plurality of electrode stacks is in contact with the positive electrode metal deposition metal film of the positive electrode metal deposition resin layer, thereby electrically connecting the plurality of positive electrode metal foils in parallel with one another. Each of the negative electrode metal foils of the above-mentioned plurality of electrode stacks is in contact with the negative electrode metal deposition metal film of the negative electrode metal deposition resin layer, thereby the plurality of negative electrode metal foils are electrically connected in parallel to one another, The positive electrode metal foil, the negative electrode metal foil, and the resin sealing member between the positive electrode metal foil and the negative electrode metal foil seal each of the plurality of electrode laminates, respectively, seal the positive electrode active material layer, the separator layer or the solid electrolyte layer, and the negative electrode active material layer. Electrode stack module. (Aspect 2) When viewed from the stacking direction of the electrode stack, the dimensions of the separator layer or the solid electrolyte layer, and the dimensions of the negative electrode active material layer are larger than the dimensions of the positive electrode active material layer, The resin sealing member is in contact with the peripheral edge of the separator layer or the solid electrolyte layer and / or the peripheral edge of the negative electrode active material layer, and is not in contact with the peripheral edge of the positive electrode active material layer. An electrode stack module according to embodiment 1. (Aspect 3) The electrode laminate module according to embodiment 1 or 2, wherein the thickness of the positive electrode deposited metal film and / or the negative electrode deposited metal film is 1.0 μm or less. (Aspect 4) The electrode laminate module according to any one of Aspects 1 to 3, wherein the thickness of the positive electrode metal foil and / or the negative electrode metal foil is 5 μm or more and 500 μm or less. (Aspect 5) When viewed from the lamination direction of the positive electrode metal-deposited resin layer and the negative electrode metal-deposited resin layer, it has a sealed portion sealed by the resin sealing member and a non-sealed portion other than the sealed portion. When viewed from the lamination direction of the positive electrode metal-deposited resin layer and the negative electrode metal-deposited resin layer, in the non-sealed portion, the positive electrode deposited metal film and the negative electrode deposited metal film do not overlap. The electrode laminate module according to any one of Aspects 1 to 4.

Advantages of the Invention

[0011] According to the present disclosure, it is possible to suppress the connection portion between a plurality of electrode laminates from being broken by bending.

Brief Description of the Drawings

[0012] [Figure 1] FIG. 1 is a schematic diagram of the electrode laminate module of the present disclosure. [Figure 2] FIG. 2 is a schematic diagram of the electrode laminate module of the present disclosure. [Figure 3] FIG. 3 is a schematic diagram for explaining an example of the present disclosure.

Modes for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present disclosure will be described in detail. The present disclosure is not limited to the following embodiments, and can be variously modified and implemented within the scope of the gist of the present disclosure. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted.

[0014] ≪Electrode Laminate Module≫ The electrode laminate module of the present disclosure includes a plurality of electrode laminates, a positive electrode metal-deposited resin layer, and a negative electrode metal-deposited resin layer. Each of the above-mentioned electrode laminates includes, in this order, at least a positive electrode metal foil, a positive electrode active material layer, a separator layer or solid electrolyte layer, a negative electrode active material layer, and a negative electrode metal foil. Each of the positive electrode metal foils in the above-mentioned plurality of electrode stacks is in contact with the positive electrode metal deposition metal film of the positive electrode metal deposition resin layer, thereby electrically connecting the plurality of positive electrode metal foils in parallel with one another. Each of the negative electrode metal foils of the above-mentioned plurality of electrode stacks is in contact with the negative electrode metal deposition metal film of the negative electrode metal deposition resin layer, thereby the plurality of negative electrode metal foils are electrically connected in parallel to one another, The positive electrode metal foil, the negative electrode metal foil, and the resin sealing member between the positive electrode metal foil and the negative electrode metal foil seal the positive electrode active material layer, the separator layer, or the solid electrolyte layer, and the negative electrode active material layer of each of the plurality of electrode laminates.

[0015] According to the electrode stack module described above, it is possible to suppress the breakage of the connection points between multiple electrode stacks due to bending.

[0016] In conventional electrode stack modules, metal foil was present at the connection points between multiple electrode stacks. In this case, the metal foil at the connection points was at risk of fracture due to metal fatigue caused by repeated bending. Therefore, the inventors of this invention investigated how to suppress the fracture of the metal foil at the connection points by replacing the metal foil with a metal-deposited resin layer. However, in this case, since the metal-deposited resin layer has higher gas permeability compared to the metal foil, there was a problem that moisture that permeated the metal-deposited resin layer could easily come into contact with the electrode stacks.

[0017] In contrast, the electrode laminate module of this disclosure can suppress the breakage of the metal foil at the connection point while also suppressing the likelihood of moisture coming into contact with the electrode laminate.

[0018] A cross-sectional view of the electrode stack module of this disclosure is shown in Figure 1, but the embodiments of this disclosure are not limited thereto. According to the electrode stack module of this disclosure shown in Figure 1, a positive electrode metal vapor-deposited resin layer 610 and / or a negative electrode metal vapor-deposited resin layer 620 are used at the connection points between a plurality of electrode stacks 300. Compared to metal foil, the metal vapor-deposited resin layer has bending resistance, so it is possible to suppress fracture due to metal fatigue at the connection points. In addition, since the positive electrode metal foil 310, the negative electrode metal foil 350, and the resin sealing member 400 seal the respective positive electrode active material layer 320, separator layer 330 or solid electrolyte layer (not shown), and negative electrode active material layer 340 of the plurality of electrode stacks 300, it is possible to suppress contact of moisture with the electrode stack 300.

[0019] In this disclosure, the electrode laminate module has a sealed portion 200 in which the electrode laminate is sealed by a resin sealing member 400, and an unsealed portion 500 other than the sealed portion 200, and the electrode laminate module of this disclosure may be bent at the unsealed portion 500.

[0020] In the electrode laminate module of this disclosure, when viewed from the stacking direction of the positive electrode metal-deposited resin layer and the negative electrode metal-deposited resin layer, the positive electrode-deposited metal film and the negative electrode-deposited metal film do not have to overlap in the unsealed portion. This makes it possible to suppress contact between the positive electrode-deposited metal film and the negative electrode-deposited metal film when the electrode laminate module is bent in the unsealed portion.

[0021] <Electrode Laminate> In this disclosure, a plurality of electrode stacks are provided in an electrode stack module, and each of the plurality of electrode stacks includes, in this order, at least a positive electrode metal foil, a positive electrode active material layer, a separator layer or solid electrolyte layer, a negative electrode active material layer, and a negative electrode metal foil.

[0022] In this disclosure, the electrode stack may be a liquid-based electrode stack or a solid-electrode stack. In this disclosure, "liquid-based electrode stack" means a battery that uses an electrolyte solution as the electrolyte, and "solid-electrode stack" means a battery that uses at least a solid electrolyte as the electrolyte. Therefore, the solid-electrode stack may use only a solid electrolyte or a combination of a solid electrolyte and a liquid electrolyte (electrolyte solution) as the electrolyte.

[0023] In this disclosure, the shape of the electrode stack when viewed from the stacking direction is not particularly limited, but examples include triangles, squares, hexagons, circles as shown in Figure 2, etc.

[0024] (Positive electrode metal foil) In this disclosure, each positive electrode metal foil of the plurality of electrode stacks is in contact with the positive electrode metal vapor-deposited metal film of the positive electrode metal vapor-deposited resin layer, thereby electrically connecting the plurality of positive electrode metal foils in parallel.

[0025] In this disclosure, examples of materials for the positive electrode metal foil include, but are not limited to, aluminum, aluminum alloys, stainless steel, and nickel. Metals with particularly good oxidation resistance are preferred as the material for the positive electrode metal foil.

[0026] In this disclosure, the thickness of the positive electrode metal foil is not particularly limited, but may be 1 μm or more, 5 μm or more, 10 μm or more, 20 μm or more, 30 μm or more, or 40 μm or more, or 500 μm or less, 300 μm or less, 100 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, or 50 μm or less.

[0027] (Cathode active material layer) In this disclosure, the positive electrode active material layer is included in each of a plurality of electrode stacks. The positive electrode active material layer of this disclosure comprises at least positive electrode active material particles and optionally comprises a solid electrolyte, a binder, and a conductive additive. For example, a positive electrode active material layer can be obtained by coating a positive electrode mixture containing at least positive electrode active material particles onto a separator layer or a solid electrolyte layer.

[0028] The content of the positive electrode active material in the positive electrode active material layer of this disclosure is not particularly limited, but may be 1% by mass or more, 5% by mass or more, 10% by mass or more, or 15% by mass or more, and may be 50% by mass or less, 45% by mass or less, 40% by mass or less, or 35% by mass or less.

[0029] The material of the positive electrode active material is not particularly limited. Examples of positive electrode active materials include lithium cobalt oxide (LiCoO2), lithium manganese oxide (LiMn2O4), and nickel-cobalt-lithium manganese oxide (NCM:LiCO2). 1 / 3 Ni 1 / 3 Mn 1 / 3 It may be O2, LiNiCoMn, etc., but is not limited to these.

[0030] The positive electrode active material may have any shape, such as spherical or fibrous.

[0031] Particle size D of positive electrode active material 50 For example, the particle size D may be 1 nm or more, 5 nm or more, or 10 nm or more, and may also be 500 μm or less, 100 μm or less, 50 μm or less, or 30 μm or less. 50 This is the particle diameter (median diameter) at 50% of the integrated value in the volume-based particle size distribution determined by laser diffraction and scattering.

[0032] The solid electrolyte optionally included in the positive electrode active material layer of this disclosure may be one known as a solid electrolyte for secondary batteries. Examples of solid electrolytes include inorganic solid electrolytes such as sulfide solid electrolytes and oxide solid electrolytes, and organic polymer electrolytes such as polymer electrolytes. From the viewpoint of heat resistance, sulfide solid electrolytes and oxide solid electrolytes are particularly preferred. The solid electrolyte may be in particulate form, for example. Only one type of solid electrolyte may be used alone, or two or more types may be used in combination.

[0033] Examples of the sulfide solid electrolyte include, but are not limited to, Li2S-P2S5, LiI-LiBr-Li2S-P2S5, and Li2S-GeS2. The sulfide solid electrolyte may be glass (amorphous) or glass ceramics.

[0034] Examples of the oxide solid electrolyte include, but are not limited to, Li7La3Zr2O 12 , Li 7-3x La3Zr2Al x O 12 and the like. The oxide solid electrolyte may be amorphous or crystalline.

[0035] Examples of the polymer electrolyte include, but are not limited to, polyethylene oxide (PEO), polypropylene oxide (PPO), and copolymers thereof.

[0036] The content of the solid electrolyte optionally contained in the positive electrode active material layer of the present disclosure is not particularly limited, but may be 1% by mass or more, 5% by mass or more, 10% by mass or more, or 13% by mass or more, and may be 60% by mass or less, 50% by mass or less, 40% by mass or less, or 30% by mass or less.

[0037] In the present disclosure, as the conductive assistant optionally contained in the positive electrode active material layer, those known as conductive assistants used in secondary batteries may be used. Specific examples of the conductive assistant include carbon materials such as vapor grown carbon fiber (VGCF), carbon nanotube (CNT), carbon nanofiber (CNF), and graphite. Only one kind of conductive assistant may be used alone, or a combination of two or more kinds may be used. The shape of the conductive assistant may be various shapes such as powder and fiber.

[0038] The content of the conductive assistant optionally contained in the positive electrode active material layer of the present disclosure is not particularly limited, but may be 0.1% by mass or more, 0.5% by mass or more, 1% by mass or more, or 3% by mass or more, and may be 20% by mass or less, 15% by mass or less, 10% by mass or less, or 8% by mass or less.

[0039] The binder optionally included in the positive electrode active material layer of this disclosure may be one known as a binder used in secondary batteries. Examples of binders include styrene-butadiene rubber (SBR), butadiene rubber (BR), polyvinylidene fluoride (PVDF), and polytetrafluoroethylene (PTFE). The binder may be used alone or in combination of two or more types.

[0040] The binder content optionally included in the positive electrode active material layer of this disclosure is not particularly limited, but may be 0.1% by mass or more, 0.5% by mass or more, 1% by mass or more, or 3% by mass or more, and may be 20% by mass or less, 15% by mass or less, 10% by mass or less, or 8% by mass or less.

[0041] (Separator layer) In this disclosure, the separator layer may be included in each of the multiple electrode stacks.

[0042] In this disclosure, the separator layer may be any separator layer commonly used in secondary batteries, such as those made of butadiene rubber (BR), polyethylene (PE), polypropylene (PP), polyester, and polyamide resins. The separator layer may be a single-layer structure or a multi-layer structure. Examples of multi-layer separator layers include a two-layer PE / PP separator, or a three-layer PP / PE / PP or PE / PP / PE separator. The separator layer may be made of a nonwoven fabric such as a cellulose nonwoven fabric, a resin nonwoven fabric, or a glass fiber nonwoven fabric. In this disclosure, the separator layer may further contain a solid electrolyte.

[0043] In this disclosure, when viewed from the stacking direction of the electrode stack, the dimensions of the separator layer may be the same as the dimensions of the positive electrode active material layer, or they may be larger than the dimensions of the positive electrode active material layer. In this disclosure, "larger dimensions" means that when the two shapes are superimposed, one shape encompasses the entirety of the other shape.

[0044] (Solid electrolyte layer) In this disclosure, the solid electrolyte layer may be included in each of the multiple electrode stacks.

[0045] In this disclosure, when viewed from the stacking direction of the electrode stack, the dimensions of the solid electrolyte layer may be the same as the dimensions of the positive electrode active material layer, or they may be larger than the dimensions of the positive electrode active material layer.

[0046] The solid electrolyte layer of this disclosure includes at least a solid electrolyte. Details of the solid electrolyte contained in the solid electrolyte of this disclosure can be found in the above description relating to the positive electrode active material layer of this disclosure.

[0047] (Negative electrode active material layer) In this disclosure, the negative electrode active material layer is included in each of a plurality of electrode stacks. The negative electrode active material layer of this disclosure comprises at least negative electrode active material particles and optionally comprises a solid electrolyte, a binder, and a conductive additive. For example, a negative electrode active material layer can be obtained by coating a negative electrode mixture containing at least negative electrode active material particles onto a separator layer or a solid electrolyte layer.

[0048] In this disclosure, the dimensions of the negative electrode active material layer may be larger than the dimensions of the positive electrode active material layer when viewed from the stacking direction of the electrode stack.

[0049] The negative electrode active material is not particularly limited and may be metallic lithium, or a material capable of intercepting and releasing metallic ions such as lithium ions. Examples of materials capable of intercepting and releasing metallic ions such as lithium ions include alloy-based negative electrode active materials, carbon materials, and lithium titanate (Li4Ti5O4). 12 Examples include, but are not limited to, those listed above.

[0050] The alloy-based anode active material is not particularly limited and includes, for example, Si alloy-based anode active materials and Sn alloy-based anode active materials. Si alloy-based anode active materials include silicon, silicon oxide, silicon carbide, silicon nitride, etc., or solid solutions thereof. Si alloy-based anode active materials may also contain metallic elements other than silicon, such as Fe, Co, Sb, Bi, Pb, Ni, Cu, Zn, Ge, In, Sn, Ti, etc. Sn alloy-based anode active materials include tin, tin oxide, tin nitride, etc., or solid solutions thereof. Sn alloy-based anode active materials may also contain metallic elements other than tin.

[0051] The carbon material is not particularly limited, and examples include graphite.

[0052] The shape of the negative electrode active material is not particularly limited and may be spherical, fibrous, or the like.

[0053] Particle size D of the negative electrode active material 50 For example, the particle size D may be 1 nm or more, 5 nm or more, or 10 nm or more, and may also be 500 μm or less, 100 μm or less, 50 μm or less, or 30 μm or less. 50 This is the particle diameter (median diameter) at 50% of the integrated value in the volume-based particle size distribution determined by laser diffraction and scattering.

[0054] For details of the negative electrode active material layer of this disclosure, refer to the description of the positive electrode active material layer of this disclosure.

[0055] (Negative electrode metal foil) In this disclosure, each negative electrode metal foil of the plurality of electrode stacks is in contact with the negative electrode metal deposition metal film of the negative electrode metal deposition resin layer, thereby electrically connecting the plurality of negative electrode metal foils in parallel.

[0056] For details of the negative electrode metal foil of this disclosure, refer to the description of the positive electrode metal foil of this disclosure. In particular, metals with reduction resistance are preferred as the material for the negative electrode metal foil of this disclosure.

[0057] <Positive metal vapor deposited resin layer> In this disclosure, the positive electrode metal-deposited resin layer comprises a resin layer and a positive electrode-deposited metal film.

[0058] (Resin layer) In this disclosure, the resin layer of the positive electrode metal vapor-deposited resin layer is not particularly limited, but a resin with high heat resistance is preferably used. Examples of such resin layers include, but are not limited to, polypropylene (PP) and polyethylene terephthalate (PET).

[0059] In this disclosure, the thickness of the resin layer is not particularly limited, but may be 0.1 μm or more, 0.3 μm or more, 0.5 μm or more, 1.0 μm or more, or 5.0 μm or more, and may be 100 μm or less, 80 μm or less, 30 μm or less, 10 μm or less, or 5.0 μm or less.

[0060] (Positive electrode evaporated metal film) In this disclosure, the positive electrode deposited metal film is deposited on a resin layer and is in contact with each positive electrode metal foil of a plurality of electrode stacks, thereby electrically connected to the positive electrode metal foil.

[0061] In this disclosure, the thickness of the cathode deposited metal film is not particularly limited, but may be 1 nm or more, 3 nm or more, 10 nm or more, 50 nm or more, or 100 nm or more, and may be 1.0 μm or less, 800 nm or less, 500 nm or less, or 150 nm or less.

[0062] Examples of materials for the cathode deposited metal film in this disclosure include, but are not limited to, aluminum, aluminum alloys, stainless steel, and nickel.

[0063] <Negative metal vapor deposited resin layer> In this disclosure, the negative electrode metal-deposited resin layer comprises a resin layer and a negative electrode-deposited metal film.

[0064] (Resin layer) Details of the resin layer of the negative electrode metal vapor-deposited resin layer of this disclosure can be found in the above description relating to the positive electrode metal vapor-deposited resin layer of this disclosure.

[0065] (Negative electrode evaporated metal film) In this disclosure, the negative electrode deposited metal film is deposited on a resin layer and is in contact with each negative electrode metal foil of a plurality of electrode stacks, thereby electrically connected to the negative electrode metal foil.

[0066] For details of the negative electrode vapor-deposited metal film of this disclosure, refer to the description relating to the positive electrode vapor-deposited metal film of this disclosure.

[0067] <Resin encapsulating material> In this disclosure, the resin sealing member is provided between the positive electrode metal foil and the negative electrode metal foil, and the positive electrode active material layer, separator layer or solid electrolyte layer, and negative electrode active material layer of each of the multiple electrode laminates are sealed by the resin sealing member, the positive electrode metal foil, and the negative electrode metal foil.

[0068] In this disclosure, the resin encapsulant is not particularly limited as long as it is a resin that can be welded to a metal. Examples of resin encapsulants include, but are not limited to, thermoplastic films containing polypropylene (PP).

[0069] In this disclosure, the resin encapsulating member only needs to encapsulate the positive electrode active material layer, separator layer or solid electrolyte layer and the negative electrode active material layer of each of the multiple electrode laminates, and its shape and / or position are not particularly limited. That is, for example, the resin encapsulating member may or may not be in contact with the positive electrode active material layer, separator layer or solid electrolyte layer and / or the negative electrode active material layer. Also, the peripheral edge of the resin encapsulating member may or may not be in direct contact with the positive electrode vapor-deposited metal film and / or the negative electrode vapor-deposited metal film.

[0070] Furthermore, in this disclosure, when viewed from the stacking direction of the electrode stack, the dimensions of the separator layer or solid electrolyte layer, and / or the dimensions of the negative electrode active material layer, may be larger than the dimensions of the positive electrode active material layer. Also, the resin sealing member may be in contact with the peripheral edge of the separator layer or solid electrolyte layer, and / or the peripheral edge of the negative electrode active material layer, and may or may not be in contact with the peripheral edge of the positive electrode active material layer. In other words, in this disclosure, when viewed from the stacking direction of the electrode stack, the dimensions of the separator layer or solid electrolyte layer, and / or the dimensions of the negative electrode active material layer, may be larger than the dimensions of the positive electrode active material layer, and the resin sealing member may be in contact with the peripheral edge of the separator layer or solid electrolyte layer, and / or the peripheral edge of the negative electrode active material layer.

[0071] The present disclosure will be further described with reference to the following embodiments, but the scope of the present disclosure is not limited to these embodiments. [Examples]

[0072] ≪Example 1≫ (Fabrication of electrode stacks) A positive electrode mixture was prepared containing LiNiCoMn as the positive electrode active material, LiI-LiBr-Li2S-P2S5 as the solid electrolyte, vapor-phase carbon fiber as the conductive additive, and butadiene rubber as the binder. A negative electrode mixture was also prepared containing graphite as the negative electrode active material, LiI-LiBr-Li2S-P2S5 as the solid electrolyte, vapor-phase carbon fiber as the conductive additive, and butadiene rubber as the binder.

[0073] Figure 3 shows the details of the example. A positive electrode mixture was applied to one side of a separator layer 330, which is a mixture of a solid electrolyte and butadiene rubber, and a negative electrode mixture was applied to the other side to prepare a positive electrode active material layer 320 and a negative electrode active material layer 340, respectively (Figure 3(a)).

[0074] Subsequently, the positive electrode metal foil 310 (aluminum foil) and the negative electrode metal foil 350 (nickel foil) were arranged so that the positive electrode active material layer 320 and the positive electrode metal foil 310 were in contact with each other, and the negative electrode active material layer 340 and the negative electrode metal foil 350 were in contact with each other. Then, a thermoplastic film containing polypropylene as a resin sealing member 400 was placed between the positive electrode metal foil 310 and the negative electrode metal foil 350, at the periphery of the separator layer 330. After that, the assembly was heated under reduced pressure at 150°C for 1 minute to produce multiple electrode laminates 300 in which the positive electrode metal foil 310, positive electrode active material layer 320, separator layer 330, negative electrode active material layer 340, and negative electrode metal foil 350 were laminated in this order (Figure 3(b)). In each of the electrode laminates 300, the positive electrode active material layer 320, the separator layer 330, and the negative electrode active material layer 340 were sealed by the positive electrode metal foil 310, the resin sealing member 400, and the negative electrode metal foil 350.

[0075] (Fabrication of electrode stack modules) A polyethylene terephthalate film with aluminum vapor-deposited on one side was prepared as the positive electrode metal vapor-deposited resin layer 610 and the negative electrode metal vapor-deposited resin layer 620. The film was then arranged so that the aluminum-deposited side of the positive electrode metal vapor-deposited resin layer 610 was in contact with the positive electrode metal foil 310, and the aluminum-deposited side of the negative electrode metal vapor-deposited resin layer 620 was in contact with the negative electrode metal foil 350. Subsequently, the film was heated under reduced pressure at 160°C for 1 minute to produce an electrode laminate module 100 in which the positive electrode metal vapor-deposited resin layer 610 and the positive electrode metal foil 310, and the negative electrode metal vapor-deposited resin layer 620 and the negative electrode metal foil 350 were connected. The resin sealing member 400 of the electrode laminate module was in contact with the positive electrode metal vapor-deposited resin layer 610 and the negative electrode metal vapor-deposited resin layer 620.

[0076] The electrode stack module fabricated in Example 1 could be repeatedly bent at the unsealed portion. [Explanation of Symbols]

[0077] 100 Electrode Stack Module 200 Sealing part 300 electrode stack 310 Positive electrode metal foil 320 Cathode active material layer 330 Separator layer 340 Negative electrode active material layer 350 Negative electrode metal foil 400 Resin sealing member 500 Unsealed part 610 Positive electrode metal vapor deposited resin layer 620 Negative metal vapor deposited resin layer

Claims

1. The device comprises multiple electrode stacks, a positive electrode metal vapor-deposited resin layer, and a negative electrode metal vapor-deposited resin layer. Each of the plurality of electrode laminates includes, in this order, at least a positive electrode metal foil, a positive electrode active material layer, a separator layer or a solid electrolyte layer, a negative electrode active material layer, and a negative electrode metal foil. Each of the positive electrode metal foils of the plurality of electrode stacks is in contact with the positive electrode metal deposition metal film of the positive electrode metal deposition resin layer, thereby connecting the plurality of positive electrode metal foils to each other electrically in parallel. Each of the negative electrode metal foils of the plurality of electrode stacks is in contact with the negative electrode metal deposition metal film of the negative electrode metal deposition resin layer, thereby the plurality of negative electrode metal foils are electrically connected in parallel to one another, The positive electrode metal foil, the negative electrode metal foil, and the resin sealing member between the positive electrode metal foil and the negative electrode metal foil seal the positive electrode active material layer, the separator layer, or the solid electrolyte layer, and the negative electrode active material layer of each of the plurality of electrode laminates. Electrode stack module.

2. When viewed from the stacking direction of the electrode stack, the dimensions of the separator layer or the solid electrolyte layer, and the dimensions of the negative electrode active material layer are larger than the dimensions of the positive electrode active material layer, and The resin sealing member is in contact with the peripheral edge of the separator layer or the solid electrolyte layer and / or the peripheral edge of the negative electrode active material layer, and is not in contact with the peripheral edge of the positive electrode active material layer. The electrode stack module according to claim 1.

3. The electrode laminate module according to claim 1 or 2, wherein the thickness of the positive electrode deposited metal film and / or the negative electrode deposited metal film is 1.0 μm or less.

4. The electrode laminate module according to claim 1 or 2, wherein the thickness of the positive electrode metal foil and / or the negative electrode metal foil is 5 μm or more and 500 μm or less.

5. When viewed from the lamination direction of the positive electrode metal vapor-deposited resin layer and the negative electrode metal vapor-deposited resin layer, it has a sealed portion sealed by the resin sealing member and an unsealed portion other than the sealed portion, When viewed from the lamination direction of the positive electrode metal vapor-deposited resin layer and the negative electrode metal vapor-deposited resin layer, the positive electrode vapor-deposited metal film and the negative electrode vapor-deposited metal film do not overlap in the unsealed portion. The electrode stack module according to claim 1 or 2.

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