Electrode stack, all-solid-state battery and manufacturing method therefor

Abstract

The present invention relates to an electrode stack, an all-solid-state battery and an all-solid-state battery manufacturing method. When wrinkles are formed on an anode tab included in the electrode stack, even if the anode tab is made of a metal having poor elongation, the wrinkles of the anode tab can be smoothed out during isostatic pressing and disconnection can be prevented.

Description

Electrode laminate, all-solid-state battery and method for manufacturing the same

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0095637, filed July 19, 2024, and Korean Patent Application No. 10-2025-0097158, filed July 18, 2025, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present invention relates to an electrode laminate, an all-solid-state battery, and a method for manufacturing the same.

[0005] Various batteries are being studied to overcome the limitations of current lithium secondary batteries in terms of battery capacity, safety, output, large-scale development, and miniaturization.

[0006] Representative examples include metal-air batteries with much larger theoretical capacity than lithium secondary batteries, all-solid-state batteries with no risk of explosion in terms of safety, supercapacitors for output, NaS batteries or RFBs (redox flow batteries) for large-scale applications, and thin film batteries for miniaturization, all of which are being continuously researched in academia and industry.

[0007] Among the various next-generation batteries, all-solid-state batteries are batteries that replace the liquid electrolytes used in conventional lithium secondary batteries with solid electrolytes. Since they do not use flammable solvents within the battery, there is no risk of fire or explosion due to decomposition reactions of conventional electrolytes, which can significantly improve safety. Furthermore, among all-solid-state batteries, technological development is continuing for sulfide-based all-solid-state batteries, which have high ionic conductivity of solid electrolytes and can theoretically achieve high energy densities of over 900 Wh / L. Here, the term "sulfide-based all-solid-state battery" refers to an all-solid-state battery that contains a sulfide-based solid electrolyte.

[0008]

[0009] Typically, lithium-ion batteries use copper (Cu) foil as the negative electrode collector. However, in sulfide-based all-solid-state batteries, because sulfur and copper react, stainless steel (SS) foil, which does not react with sulfur, is used instead of Cu foil as the negative electrode collector. Compared to Cu, nickel, or aluminum foil, SS foil has poor elongation, making it less susceptible to shrinkage and expansion.

[0010] The manufacturing process of all-solid-state batteries inevitably involves isostatic pressing. If pressure is applied to the pouch cell from the isostatic pressing jig during isostatic pressing, the pressure may cause the cell to warp or the tabs to be pulled due to the gap between the electrodes. In this case, the tabs of the SS foil used as the negative current collector may not stretch as much as the aluminum foil used as the positive current collector, resulting in a short circuit phenomenon in which the tabs break.

[0011] Therefore, there is a need for the development of a technology that can prevent short circuiting of the negative electrode tab without reacting with sulfur during the isotropic pressing process in the manufacturing process of a sulfide-based all-solid-state battery.

[0012] [Prior Art Literature]

[0013] (Patent Document 1) Japanese Patent Publication No. 2017-059442

[0014] The inventors of the present invention conducted a multifaceted study to solve the above problem, and as a result, formed wrinkles on the negative electrode tab, and confirmed that the wrinkles on the negative electrode tab were partially spread out during the isostatic pressing process, thereby preventing short circuiting of the negative electrode tab.

[0015] Accordingly, an object of the present invention is to provide an electrode laminate for an all-solid-state battery including a negative electrode tab having wrinkles formed thereon.

[0016] Another object of the present invention is to provide an all-solid-state battery manufactured using an electrode laminate for an all-solid-state battery including a negative electrode tab having wrinkles formed thereon.

[0017] In order to achieve the above purpose, the present invention provides an electrode laminate for a sulfide-based all-solid-state battery, comprising a positive electrode, a negative electrode, and a solid electrolyte membrane interposed therebetween.

[0018] The above negative electrode includes a negative electrode current collector and a negative electrode active material layer formed on one surface of the negative electrode current collector,

[0019] Including a negative tab formed on one side of the negative electrode current collector,

[0020] The above negative tab is wrinkled,

[0021] An electrode laminate for an all-solid-state battery is provided, wherein the length of the above-mentioned wrinkled negative tab is equal to or shorter than the length of the positive tab.

[0022] In one embodiment of the present invention, an electrode laminate for an all-solid-state battery is provided, wherein the negative electrode current collector and the negative electrode tab include a metal having an elongation of 10% or less.

[0023] In one embodiment of the present invention, an electrode laminate for an all-solid-state battery is provided, wherein the negative electrode current collector and the negative electrode tab include at least one metal selected from the group consisting of stainless steel (SS), tungsten, molybdenum, beryllium, chromium, bismuth, lead-antimony alloy, hard copper (hard Cu), magnesium, and tin.

[0024] In one embodiment of the present invention, an electrode laminate for an all-solid-state battery is provided, wherein the solid electrolyte membrane includes a sulfide-based solid electrolyte membrane.

[0025]

[0026] The present invention also provides an all-solid-state battery comprising an electrode assembly,

[0027] The electrode assembly includes an anode, a cathode, and a solid electrolyte membrane interposed therebetween,

[0028] The above negative electrode includes a negative electrode current collector and a negative electrode active material layer formed on one surface of the negative electrode current collector,

[0029] Including a negative tab formed on one side of the negative electrode current collector,

[0030] The above negative tab is wrinkled,

[0031] An all-solid-state battery is provided, wherein the length of the above-mentioned wrinkled negative tab is longer than or equal to the length of the positive tab.

[0032] In one embodiment of the present invention, an all-solid-state battery is provided, wherein the all-solid-state battery is a pouch-type all-solid-state battery.

[0033]

[0034] The present invention also comprises a step of forming an electrode laminate in which a positive electrode, a solid electrolyte membrane, and a negative electrode are sequentially laminated (S1);

[0035] (S2) a step of placing the electrode stack inside a pouch-shaped battery case; and

[0036] (S3) A method for manufacturing an all-solid-state battery is provided, including a step of applying isotropic pressure to an electrode laminate disposed inside the pouch-shaped battery case.

[0037] In one embodiment of the present invention, a method for manufacturing an all-solid-state battery is provided, wherein the isostatic pressing is warm isostatic pressing (WIP), hot isostatic pressing (HIP), or cold isostatic pressing (CIP).

[0038] According to the present invention, when a wrinkle is formed on a negative electrode tab included in an electrode laminate for manufacturing an all-solid-state battery, the length of the negative electrode tab increases as the wrinkle is straightened during an isotropic pressing process that inevitably accompanies the manufacturing of the all-solid-state battery, so that disconnection of the negative electrode tab during the isotropic pressing process can be prevented.

[0039] In addition, since the length of the negative electrode tab increases as the wrinkles of the negative electrode tab are spread out during the isostatic pressing process in the above-mentioned all-solid-state manufacturing process, it has the same or similar effect as the length of the negative electrode tab being elongated, so even metals with poor elongation can be applied and used in the negative electrode tab.

[0040] Figure 1a is a schematic diagram of an electrode laminate according to a prior art, and Figure 1b is a schematic diagram of an electrode laminate according to a preferred embodiment of the present invention.

[0041] Hereinafter, the present invention will be described in more detail to help understand the present invention.

[0042] The terms and words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0043] The term “electrode laminate” as used herein means an anode, a cathode and a laminate interposed therebetween, including a cathode tab having a wrinkled shape.

[0044] The term “electrode assembly” used herein refers to the electrode laminate after undergoing an isostatic pressing process. Due to the isostatic pressing process, the degree of wrinkles and length of the negative electrode tabs within the electrode assembly are different from those of the negative electrode tabs within the electrode laminate. In addition, the degree of bonding between internal materials of the electrode in the electrode assembly and the degree of bonding between the electrode and the solid electrolyte membrane are also increased compared to the electrode laminate.

[0045]

[0046] Electrode laminate for all-solid-state batteries

[0047] The present invention relates to an electrode laminate for an all-solid-state battery.

[0048] The electrode laminate for an all-solid-state battery according to the present invention is intended for application in the manufacturing process of an all-solid-state battery. To manufacture an all-solid-state battery, an isostatic pressing (WIP) process is performed. The electrode laminate for an all-solid-state battery according to the present invention may refer to a laminate prior to application to the isostatic pressing process.

[0049]

[0050] Figure 1a is a schematic diagram of an electrode laminate according to a prior art, and Figure 1b is a schematic diagram of an electrode laminate according to a preferred embodiment of the present invention.

[0051] Referring to FIG. 1b, an electrode laminate for an all-solid-state battery according to the present invention includes a positive electrode (20), a negative electrode (10), and a solid electrolyte membrane (30) interposed therebetween, wherein the negative electrode (10) includes a negative electrode current collector (not shown) and a negative electrode active material layer (not shown) formed on one surface of the negative electrode current collector, and includes a negative electrode tab (12) formed on one side of the negative electrode current collector, wherein the negative electrode tab (12) is wrinkled (W). The length (H) of the wrinkled negative electrode tab may be equal to or shorter than the length of the positive electrode tab (22).

[0052] The above negative electrode tab may be formed by welding to one side of the negative electrode collector. The negative electrode tab may be formed offset from the center of one side of the negative electrode collector toward the edge.

[0053] Additionally, the negative tab may be formed with wrinkles. The wrinkles may be formed over the entire negative tab. The wrinkles may be formed using a mold.

[0054] The degree of wrinkle formation, which indicates the degree to which the wrinkles are formed, can be calculated by the following equation 1:

[0055] <Formula 1>

[0056] Wrinkle = (|Cathode tab length before wrinkle formation - Anode tab length|) / (Anode tab length).

[0057] The larger the wrinkle degree calculated in the above equation 1, the more wrinkles are formed.

[0058]

[0059] In one embodiment of the present invention, the negative electrode current collector and the negative electrode tab may include a metal having an elongation of 10% or less. Specifically, the elongation may be 10% or less, 9% or less, 8% or less, 7% or less, 6% or less, 5% or less, 4% or less, 3% or less, 2% or less, 1% or less, 0.9% or less, 0.8% or less, 0.7% or less, or 0.6% or less. The lower limit of the elongation is not particularly limited, but may be, for example, more than 0%, 0.1% or more, 0.2% or more, 0.3% or more, 0.4% or more, or 0.5% or more. The elongation may refer to an elongation at 25°C.

[0060] If wrinkles are formed on the above-mentioned negative tab, the wrinkles are straightened out during the isostatic pressing process, so even if the elongation of the negative tab is somewhat reduced, the problem of the negative tab being disconnected during the isostatic pressing process can be prevented.

[0061] Specifically, the negative electrode tab may include one or more metals selected from the group consisting of stainless steel (SS), tungsten, molybdenum, beryllium, chromium, bismuth, a lead-antimony alloy, hard copper (hard Cu), magnesium, and tin. These metals may be difficult to apply to the negative electrode tab of a battery manufactured by an isostatic pressing process because the elongation thereof is not high. However, these metals can be applied to the negative electrode tab when the negative electrode tab is formed in a wrinkled shape.

[0062] Typically, the electrode tab is in contact with or connected to the electrode current collector to electrically connect the electrode current collector to the outside, and the electrode tab is welded to the electrode current collector. Therefore, the electrode current collector and the electrode tab may be made of the same type of metal.

[0063] Accordingly, the negative electrode current collector may also be made of the same type of metal as the negative electrode tab.

[0064]

[0065] In one embodiment of the present invention, the solid electrolyte membrane may include a sulfide-based solid electrolyte membrane.

[0066] The above sulfide-based solid electrolyte membrane includes a sulfide-based solid electrolyte, and the sulfide-based solid electrolyte is not particularly limited as long as it is one commonly used in all-solid-state batteries. For example, the sulfide-based solid electrolyte may be represented by the following chemical formula 1:

[0067] <Chemical Formula 1>

[0068] Li a M b S c X d

[0069] In the above chemical formula 1, M is selected from P, Sn, Sb, As, and Ge;

[0070] X is selected from Cl, Br and I;

[0071] 5≤a<7.5, 0.5 <b<1.5, 4<c<6 및 0.5<d<2이다.

[0072]

[0073] In one embodiment of the present invention, the positive electrode may include a positive electrode current collector and a positive electrode active material layer formed on one surface of the positive electrode current collector, and a positive electrode tab may be formed by bonding to one side of the positive electrode current collector.

[0074] The above-mentioned positive electrode collector is not particularly limited as long as it is a positive electrode collector used for the positive electrode of an all-solid-state battery. Specifically, the positive electrode collector may include at least one selected from the group consisting of aluminum, nickel, titanium, palladium, and calcined carbon.

[0075] Additionally, the positive electrode tab may be formed by welding and joining to one side of the positive electrode current collector. The positive electrode tab may not be formed in the center of one side of the positive electrode current collector, but may be formed offset toward the edge with respect to the center. When the positive electrode and negative electrode are laminated, the positive electrode tab may be formed so as not to overlap the negative electrode tab.

[0076]

[0077] The electrode laminate as described above is intended for application to a manufacturing process of an all-solid-state battery including an isostatic pressing process, and the insufficient elongation of the negative electrode tab can be compensated for by smoothing out wrinkles during the isostatic pressing process. In particular, when the electrode laminate is applied to a manufacturing process of a sulfide-based all-solid-state battery, side reactions between sulfur and the negative electrode current collector or the negative electrode tab can be prevented, while simultaneously preventing short circuiting of the negative electrode tab.

[0078]

[0079] All-solid-state batteries

[0080] The present invention also relates to an all-solid-state battery including an electrode assembly, wherein the electrode assembly includes a positive electrode, a negative electrode, and a solid electrolyte membrane interposed therebetween, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer or a non-cathode coating layer formed on one surface of the negative electrode current collector, and includes a negative electrode tab formed on one side of the negative electrode current collector, wherein the negative electrode tab is corrugated, and a length of the corrugated negative electrode tab may be longer than or equal to a length of the positive electrode tab. The non-cathode coating layer may be a primer coating layer.

[0081] The materials and forms forming the positive electrode, negative electrode, and solid electrolyte membrane are the same as described above.

[0082] However, in the electrode assembly included in the all-solid-state battery manufactured through the isotropic pressing process, the wrinkle degree and length of the negative electrode tab are different compared to the electrode laminate before the isotropic pressing process.

[0083] The wrinkles formed on the above-described negative tab are straightened out through an isostatic pressing process. As the wrinkles are straightened out, the length of the negative tab increases, and thus, the length of the negative tab included in the all-solid-state battery manufactured through the isostatic pressing process becomes longer than or equal to the length of the positive tab.

[0084]

[0085] In one embodiment of the present invention, the all-solid-state battery may be a pouch-type all-solid-state battery.

[0086] The above pouch-type all-solid-state battery may have the electrode assembly built into a pouch-type battery case.

[0087]

[0088] Manufacturing method of all-solid-state battery

[0089] The present invention also relates to a method for manufacturing an all-solid-state battery.

[0090] A method for manufacturing an all-solid-state battery according to the present invention comprises the steps of (S1) forming an electrode laminate by laminating a solid electrolyte membrane between a positive electrode and a negative electrode; (S2) arranging the electrode laminate inside a pouch-shaped battery case; and (S3) applying isotropic pressure to the electrode laminate arranged inside the pouch-shaped battery case.

[0091]

[0092] Hereinafter, the method for manufacturing an all-solid-state battery according to the present invention will be described in more detail step by step.

[0093]

[0094] In the present invention, in the step (S1), an electrode laminate can be formed in which a positive electrode, a solid electrolyte membrane, and a negative electrode are sequentially laminated. At this time, the lamination method is not particularly limited as long as it allows the positive electrode, the solid electrolyte membrane, and the negative electrode to be sequentially laminated. For example, a positive electrode and a negative electrode including a solid electrolyte membrane can be laminated, or a solid electrolyte membrane can be disposed between the positive electrode and the negative electrode for lamination.

[0095] The above solid electrolyte membrane can be laminated so as to be in contact with the positive electrode active material layer and the negative electrode active material layer.

[0096]

[0097] In addition, the positive electrode tab coupled to the positive electrode collector and the negative electrode tab coupled to the negative electrode collector may be laminated so that they face the same direction, but the positive electrode tab and the negative electrode tab do not overlap.

[0098]

[0099] In the present invention, in the step (S2), the electrode laminate can be placed inside a pouch-shaped battery case.

[0100]

[0101] In the present invention, isotropic pressing can be performed on the electrode laminate disposed inside the pouch-shaped battery case (S3).

[0102] The above isotropic pressurization pressure and temperature are not particularly limited as long as they are within the pressure and temperature ranges generally applied in the all-solid-state battery manufacturing process. For example, the isotropic pressurization may be performed under a pressure of 100 MPa to 600 MPa and a temperature of 25°C to 150°C. Specifically, the pressure may be 100 MPa or more, 150 MPa or more, 200 MPa or more, 250 MPa or more, or 300 MPa or more, and may be 600 MPa or less, 550 MPa or less, 500 MPa or less, 450 MPa or less, or 400 MPa or less. In addition, if the pressure is less than 100 MPa, interfacial contact between materials within the electrode and interfacial contact between the electrode and the solid electrolyte membrane may not be sufficiently formed, which may excessively increase the interfacial resistance. In addition, the temperature may be 25°C or higher, 30°C or higher, 35°C or higher, 40°C or higher, or 45°C or higher, and may be 150°C or lower, 145°C or lower, 140°C or lower, 135°C or lower, or 130°C or lower. If the temperature is lower than 25°C, it may be difficult to sufficiently form interfacial contact between materials within the electrode and interfacial contact between the electrode and the solid electrolyte membrane, and if it exceeds 150°C, an unintended side reaction may occur at the interface between the electrode and the solid electrolyte membrane.

[0103]

[0104] In the all-solid-state battery manufactured after the above isostatic pressing, the wrinkles of the negative electrode tab may be relatively straightened compared to before the isostatic pressing, and accordingly, the length of the negative electrode tab may also be longer than before the isostatic pressing. Therefore, the length of the negative electrode tab after the isostatic pressing may be longer than or equal to the length of the positive electrode tab. The smaller the difference between the lengths of the negative electrode tab and the positive electrode tab, the easier the cell assembly can be.

[0105]

[0106] battery module

[0107] The present invention also relates to a battery module including the all-solid-state battery as a unit battery, a battery pack including the battery module, and a device including the battery pack as a power source.

[0108] At this time, specific examples of the device include, but are not limited to, a power tool that is powered by an electric motor; an electric vehicle including an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), etc.; an electric two-wheeled vehicle including an electric bicycle (E-bike) and an electric scooter (E-scooter); an electric golf cart; and a power storage system.

[0109] Hereinafter, preferred examples are presented to help understand the present invention, but the following examples are only illustrative of the present invention, and it is obvious to those skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it is also natural that such changes and modifications fall within the scope of the appended patent claims.

[0110]

[0111] In the following examples and comparative examples, electrode laminates and all-solid-state batteries were manufactured according to the configuration of the negative electrode as described in Table 1 below.

[0112] Additionally, the wrinkle of the negative tab is calculated by the following equation 1:

[0113] <Formula 1>

[0114] Wrinkle = (|Cathode tab length before wrinkle formation - Anode tab length|) / (Anode tab length).

[0115]

[0116] Negative electrode Negative current collector Negative tab length Before wrinkles are formed Negative tab length Wrinkles Example 1 SSSS1 10.1 Example 2 SSSS1 50.5 Example 3 SSSS2 0 1.0 Comparative example 1 SSSS1 0 No wrinkles 0

[0117]

[0118] Example 1

[0119] 1-1. Manufacturing of electrode laminates

[0120] An electrode laminate was manufactured by sequentially stacking an NCM positive electrode, a sulfide-based solid electrolyte membrane including LiPSCl, and an anode. The NCM positive electrode refers to a positive electrode including a positive electrode material in which nickel (Ni) and manganese (Mn) are combined with lithium cobalt oxide (LCO). The negative electrode may be in the form of a non-cathode and include a primer coating layer on a stainless steel (SS) current collector.

[0121] The above anode includes an Al foil as an anode tab. The anode tab used had a length of 10 mm.

[0122] In addition, the negative electrode includes a stainless steel (SS) foil as a negative electrode tab, and the length of the negative electrode tab before the formation of the wrinkles is 11 mm. The wrinkles were formed so that the wrinkle degree of the negative electrode tab was 0.1. The wrinkles were formed on the negative electrode tab using the mold having the wrinkled shape.

[0123]

[0124] 1-2. All-solid-state battery manufacturing

[0125] After placing the above electrode laminate in a pouch-type battery case, a WIP (Warm Isostatic Press) process was performed by isostatic pressing under pressure and temperature conditions of 500 MPa and 80°C.

[0126]

[0127] Example 2

[0128] An electrode laminate and an all-solid-state battery were manufactured in the same manner as in Example 1, except that the length of the negative tab before the formation of the wrinkles was 15 mm and the wrinkle degree of the negative tab was 0.5.

[0129]

[0130] Example 3

[0131] An electrode laminate and an all-solid-state battery were manufactured in the same manner as in Example 1, except that the length of the negative tab was 20 mm before the wrinkles were formed, and the wrinkle degree of the negative tab was 1.0.

[0132]

[0133] Comparative Example 1

[0134] An electrode laminate and an all-solid-state battery were manufactured in the same manner as in Example 1, except that no wrinkles were formed on the negative tab.

[0135]

[0136] Experimental Example 1: Measurement of wrinkles and length of the cathode tab before and after the isostatic pressing process.

[0137] The length of the positive electrode tab, the length of the negative electrode tab, the degree of wrinkles, and the presence of short circuits before and after the isostatic pressing process for manufacturing an all-solid-state battery were measured using the following method, and the results are shown in Table 2 below.

[0138]

[0139] (1) Measurement of the length of the positive and negative tabs

[0140] The lengths of the positive and negative tabs were measured using a standard ruler.

[0141]

[0142] (2) Measurement of wrinkles on the negative tab

[0143] The wrinkle degree of the negative tab was measured using the following equation 1.

[0144] Wrinkle = (Cathode tab length before wrinkle formation - Anode tab length) / (Anode tab length)

[0145]

[0146] (3) Observe whether the negative tab is open.

[0147] After the WIP process, the open-circuit voltage (OCV) was measured. If a short circuit occurred, OCV was not measured.

[0148]

[0149] Wrinkled cathode tab disconnection occurrence Length (mm) Wrinkle degree Before isostatic pressing After isostatic pressing Before isostatic pressing After isostatic pressing Example 110110.10X Example 21010.50.50.4X Example 31010.41.00.9X Comparative example 1101000○

[0150]

[0151] As a result, as shown in Table 2 above, it was confirmed that no short circuit occurred when isotropic pressing was performed using a negative tab with wrinkles formed.

[0152]

[0153] [Explanation of symbols]

[0154] 1: Electrode laminate

[0155] 10: Cathode

[0156] 11: Negative current collector

[0157] 12: Negative tab

[0158] W: Wrinkles

[0159] H: Length of the corrugated cathode tab

[0160] 20: Bipolar

[0161] 21: Positive current collector

[0162] 22: Positive tab

[0163] 30: Solid electrolyte membrane

Claims

1. An electrode laminate for a sulfide-based all-solid-state battery, comprising a positive electrode, a negative electrode, and a solid electrolyte membrane interposed therebetween, The above negative electrode includes a negative electrode current collector and a negative electrode active material layer formed on one surface of the negative electrode current collector, Including a negative tab formed on one side of the negative electrode current collector, The above negative tab is wrinkled, An electrode laminate for an all-solid-state battery, wherein the length of the above-mentioned wrinkled negative tab is equal to or shorter than the length of the positive tab.

2. In paragraph 1, An electrode laminate for an all-solid-state battery, wherein the negative electrode current collector and the negative electrode tab include a metal having an elongation of 10% or less.

3. In paragraph 1, An electrode laminate for an all-solid-state battery, wherein the negative electrode current collector and the negative electrode tab include at least one metal selected from the group consisting of stainless steel (SS), tungsten, molybdenum, beryllium, chromium, bismuth, lead-antimony alloy, hard copper (hard Cu), magnesium, and tin.

4. In paragraph 1, An electrode laminate for an all-solid-state battery, wherein the solid electrolyte membrane comprises a sulfide-based solid electrolyte membrane.

5. An all-solid-state battery including an electrode assembly, The electrode assembly includes an anode, a cathode, and a solid electrolyte membrane interposed therebetween, The above negative electrode includes a negative electrode current collector and a negative electrode active material layer formed on one surface of the negative electrode current collector, Including a negative tab formed on one side of the negative electrode current collector, The above negative tab is wrinkled, An all-solid-state battery, wherein the length of the negative tab is longer than or equal to the length of the positive tab.

6. In paragraph 5, The above all-solid-state battery is a pouch-type all-solid-state battery. 7.(S1) A step of forming an electrode laminate of claim 1 in which a positive electrode, a solid electrolyte membrane, and a negative electrode are sequentially laminated; (S2) a step of placing the electrode stack inside a pouch-shaped battery case; and (S3) A method for manufacturing an all-solid-state battery, comprising the step of applying isotropic pressure to an electrode laminate disposed inside the pouch-shaped battery case.

8. In paragraph 7, A method for manufacturing an all-solid-state battery, wherein the above isostatic pressing is warm isostatic pressing (WIP), hot isostatic pressing (HIP), or cold isostatic pressing (CIP).

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