Lead tab for bonding to electrode tab and all-solid-state battery including structure having lead tab bonded to electrode tab

Abstract

Disclosed are a lead tab for bonding to an electrode tab and an all-solid-state battery including a structure of a lead tab for bonding to an electrode tab, in which a problem of separation of a negative electrode protective layer can be solved by bonding a lead tab made of a predetermined material to an electrode tab with low welding energy, and in which the lead tab is not bonded to the electrode tab, and an all-solid-state battery including a structure of the lead tab for bonding to the electrode tab. In an all-solid-state battery including a structure of a lead tab bonded to an electrode tab, an electrolyte and the lead tab are not in contact with each other, and thus a lithiation reaction is not caused. A lead tab for bonding to an electrode tab is bonded to an electrode tab of an electrode assembly of an all-solid-state battery to form a bonding portion, and a lead included in the bonding portion contains aluminum.

Description

Technical Field

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0104686, filed on August 10, 2023, and Korean Patent Application No. 10-2024-0105049, filed on August 7, 2024, the disclosures of which are incorporated herein by reference in their entirety.

[0002] The present invention relates to a lead tab for bonding to an electrode tab and an all-solid-state battery including the lead tab. More specifically, the present invention relates to a lead tab for bonding to an electrode tab and an all-solid-state battery including the lead tab, wherein the lead tab, made of a specific material, is bonded to the electrode tab using low welding energy, thereby resolving the problem of detachment of the negative electrode protective layer, and wherein the electrolyte does not contact the lead tab, thereby preventing a lithiation reaction. Background Art

[0003] Energy storage technology is gaining increasing attention as its applications expand from mobile phones, tablets, laptops, and camcorders to include energy sources for electric vehicles (EVs) and hybrid electric vehicles (HEVs). This has led to a surge in research and development of electrochemical devices. Within this area, electrochemical devices are receiving the most attention, with the development of rechargeable and rechargeable secondary batteries becoming a key focus. In recent years, the development of these batteries has led to the research and development of new electrode and cell designs to improve capacity density and specific energy.

[0004] When manufacturing such a secondary battery, a welding operation is performed to combine tabs between unit electrodes to obtain an output suitable for an intended use, and in this process, the electrode tabs and lead tabs are joined. Figure 1 is a perspective view showing an electrode tab and a lead tab joined in a conventional secondary battery, Figure 2 FIG is a plan view of a lead tab joined to an electrode tab in a conventional secondary battery. Figure 1 As shown, conventional secondary batteries require electrode tabs 2 (positive tabs or negative tabs) to electrically connect the positive and negative plates constituting the electrode assembly 1 to external devices, such as Figure 2 As shown, these electrode tabs are joined to the lead tabs 3 (positive electrode lead tabs or negative electrode lead tabs) by welding. Figure 2 As shown, the lead tab 3 includes a metal lead 3a and a lead film 3b partially provided on one or both surfaces thereof, wherein the metal lead 3a on one surface is overlapped and joined to the electrode tab.

[0005] More specifically, most secondary batteries use ultrasonic welding, laser welding, or resistance welding to join the negative electrode tab (copper) or positive electrode tab (aluminum) extending outside the electrode of the electrode assembly to the lead tab (copper, nickel) as a separate component. For example, lithium-ion batteries use copper (Cu) as the negative electrode tab, and these tabs are welded to the lead tab (Ni) to join the electrode tab and the lead tab.

[0006] At the same time, from the perspective of safety, an all-solid-state battery that has no explosion risk compared to a lithium secondary battery refers to a battery in which the liquid electrolyte is replaced with a solid electrolyte. Therefore, since it does not use flammable solvents, it will not catch fire or explode due to the decomposition reaction of the conventional electrolyte, so the safety can be significantly improved. Since such all-solid-state batteries can use lithium metal or lithium alloy as the negative electrode material, they have the advantage of significantly improving the energy density per unit mass and per unit volume of the battery. In addition, a protective layer is provided on the surface of such a lithium metal negative electrode (specifically, a layer located between the negative electrode active material and the solid electrolyte to prevent contact between them), but when the negative electrode tab is joined to the lead tab (copper, nickel) by welding, the problem of the negative electrode protective layer falling off will occur. This is because high welding energy is applied in an environment where the adhesion between the negative electrode and the negative electrode protective layer is inevitably low. Therefore, there is a need for a method of joining the electrode tab and the lead tab by welding but preventing the negative electrode protective layer from falling off. Summary of the Invention

[0007] [Technical Issues]

[0008] Therefore, an object of the present invention is to provide a lead tab for joining to an electrode tab and an all-solid-state battery having a lead tab joined to an electrode tab, which can solve the problem of detachment of the negative electrode protective layer by joining a lead tab made of a specific material to the electrode tab using low welding energy, and, in the all-solid-state battery in which the lead tab and the electrode tab are joined, since the electrolyte does not contact the lead tab, no lithiation reaction is caused.

[0009] [Technical solution]

[0010] To achieve the above object, the present invention provides a lead tab for joining with an electrode tab of an electrode assembly of an all-solid-state battery to form a joining portion, wherein the lead included in the joining portion comprises aluminum.

[0011] The present invention also provides an all-solid-state battery comprising a positive electrode, a negative electrode, and a solid electrolyte disposed between the positive electrode and the negative electrode, wherein the lead tab is joined to an electrode tab.

[0012] [Effects of the Invention]

[0013] According to the lead tab for joining to the electrode tab and the all-solid-state battery including the lead tab joined to the electrode tab of the present invention, the lead tab made of a specific material can be joined to the electrode tab using low welding energy, thereby solving the problem of falling off of the negative electrode protective layer, thereby having the advantage of improving the assembly stability of the battery.

[0014] In addition, according to the lead tab for bonding to the electrode tab and the all-solid-state battery including the lead tab bonded to the electrode tab of the present invention, in the all-solid-state battery in which the lead tab and the electrode tab are bonded, there is an advantage that no lithiation reaction is caused because the electrolyte does not contact the lead tab. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a perspective view showing the bonding between an electrode tab and a lead tab in a conventional secondary battery.

[0016] Figure 2 It is a plan view of a lead tab joined to an electrode tab in a conventional secondary battery.

[0017] Figure 3 It is a plan view showing the bonding between an electrode tab and a lead tab in a secondary battery.

[0018] Figure 4 It is a graph showing the performance of batteries according to Examples of the present invention and Comparative Examples.

[0019] Figure 5 It is a graph showing the life performance of the battery according to the embodiment of the present invention.

[0020] Figure 6 It is a graph showing the life performance of batteries of comparative examples. DETAILED DESCRIPTION

[0021] The present invention is described in detail below.

[0022] The lead tab for joining an electrode tab of the present invention is joined to an electrode tab of an all-solid-state battery electrode assembly to form a joint portion, and the lead tab includes an aluminum-containing lead in the joint portion.

[0023] Generally, in the manufacture of secondary batteries, a welding operation is performed to connect tabs between unit electrodes to obtain an output suitable for an application, wherein, for example Figure 2 The conventional lead tabs shown in are soldered to e.g. Figure 1The electrode tabs shown in Figure 1 are also commonly used in most secondary batteries to join the negative electrode tab (copper) or positive electrode tab (aluminum) to the lead tab (copper, nickel) by ultrasonic welding, laser welding, or resistance welding. Furthermore, lithium-ion batteries use copper (Cu) as the negative electrode tab and weld it to the lead tab (Ni) to join the electrode tab and lead tab.

[0024] At the same time, from a safety perspective, all-solid-state batteries, which have no explosion risk compared to lithium secondary batteries, refer to batteries in which the liquid electrolyte is replaced with a solid electrolyte, and such all-solid-state batteries can use lithium metal or lithium alloy as the negative electrode material, so they have the advantage of significantly improving the energy density per unit mass and per unit volume of the battery. In addition, a protective layer is provided on the surface of such a lithium metal negative electrode. At this time, when the negative electrode tab is joined to the lead tab (copper, nickel) by welding, the problem of the negative electrode protective layer falling off will occur. This is because high welding energy is applied in an environment where the adhesion between the negative electrode and the negative electrode protective layer is inevitably low.

[0025] Therefore, the applicant has invented a method for preventing the negative electrode protective layer from falling off by welding the electrode tab to the lead piece, and ensuring that the lead contains aluminum in the joint formed by welding the electrode tab of the all-solid-state battery electrode assembly. The following is a more detailed description of the lead tab for bonding to the electrode tab of the present invention.

[0026] The lead wire constituting the lead tab for joining to the electrode tab of the present invention is similar to a conventional lead wire and is in sheet form and can form a joining portion by joining or adhering to the electrode tab. Figure 2 The reference numeral 3a in the figure constitutes a lead tab for joining to an electrode tab of the present invention, and at the same time, by connecting to the electrode tab (corresponding to Figure 1 2 in the reference numeral 2) to form a joint. In other words, conventionally, copper or nickel is used for the lead of the lead tab. However, in existing all-solid-state batteries, the negative electrode protective layer may fall off when the negative electrode tab is welded to the lead tab. However, the present applicant has solved the problem of negative electrode protective layer falling off by applying aluminum to the lead of the lead tab, enabling low welding energy to be used for bonding to the electrode tab.

[0027] In other words, the lead tab for bonding to the electrode tab of the present invention is bonded to the electrode tab of the all-solid-state battery electrode assembly to form a joint, wherein the lead included in the joint comprises aluminum. Based on the total weight of the lead, the lead may comprise 50 to 100% by weight, preferably 70 to 100% by weight, more preferably 85 to 100% by weight, and most preferably 95 to 100% by weight of aluminum.

[0028] Furthermore, the lead may have a structure or form in which one metal is plated on the surface of another metal, for example, aluminum is plated on the surface of a metal such as copper, manganese, silicon, magnesium, zinc, and nickel.

[0029] In addition, in the case where the lead contains less than 100 wt % of aluminum based on the total weight of the lead, the lead may further contain one selected from the group consisting of copper, manganese, silicon, magnesium, zinc and nickel (here, meaning a uniformly mixed, non-plated state).

[0030] The lead tab for joining the electrode tab of the present invention is preferably the lead tab for joining the negative electrode tab as described above, but can also be used for joining the positive electrode tab as needed. In other words, the lead tab for joining the electrode tab can be suitable for joining the positive electrode tab and the negative electrode tab, or both. In particular, considering the ease of the joining process, the lead tab for joining the electrode tab can preferably be used for joining the positive electrode tab and the negative electrode tab at the same time.

[0031] The lead tabs of the present invention for joining to the electrode tabs are also characterized in that they do not come into contact with the electrolyte contained in the electrode assembly, as will be described in detail below in the section "All-Solid-State Batteries."

[0032] In addition, if Figure 2 As shown, the lead tab for bonding with the electrode tab of the present invention may further include a lead film 3b partially disposed on one or both sides of the lead 3a. The lead film may be made of the same material as the lead film included in the conventional lead tab, such as polypropylene.

[0033] Furthermore, the electrode tabs of the “all-solid-state battery electrode assembly” are preferably electrode tabs of an electrode assembly of a sulfide-based all-solid-state battery.

[0034] Hereinafter, the all-solid-state battery of the present invention will be described.

[0035] The all-solid-state battery includes a structure for bonding the aforementioned lead tabs to the electrode tabs. More specifically, the all-solid-state battery includes the aforementioned lead tabs, which include: a positive lead tab bonded to the positive electrode tab; and a negative lead tab bonded to the negative electrode tab. Furthermore, one or more of the leads in the positive and negative lead tabs are made of aluminum and bonded to the electrode tabs. Preferably, the all-solid-state battery is a sulfide-based all-solid-state battery.

[0036] In one embodiment of the present invention, the manufactured all-solid-state battery may include a positive electrode, a negative electrode, and a solid electrolyte disposed between the positive electrode and the negative electrode. In addition, the all-solid-state battery may be manufactured in any configuration known in the art by any known method.

[0037] The positive electrode may include an active material in particulate form, a conductive material, a binder, etc. Any positive electrode active material can be used without limitation as long as it can be used as a positive electrode active material in a conventional lithium-ion secondary battery. In addition, the positive electrode active material may be a lithium transition metal oxide containing one or more transition metals. For example, the positive electrode active material may be selected from the group consisting of: LiCoO2, LiNiO2, LiMnO2, Li2MnO3, LiMn2O4, Li(Ni a Co b Mn c )O2(0 < a < 1, 0 < b < 1, 0 < c < 1, a + b + c = 1), LiNi 1-y Co y O2(0 < y < 1), LiCo 1-y Mn y O2, LiNi 1-y Mn y O2(0 < y < 1), Li(Ni a Co b Mn c )O4(0 < a < 2, 0 < b < 2, 0 < c < 2, a + b + c = 2), LiMn 2-z Ni z O4(0 < z < 2), LiMn 2-z Co z O4(0 < z < 2) and combinations thereof.

[0038] The above positive electrode conductive materials can also be used without limitation as long as they can be used as positive electrode conductive materials in conventional lithium-ion secondary batteries. For example, the positive electrode conductive material may be a conventional material such as carbon nanotubes (single-walled carbon nanotubes, multi-walled carbon nanotubes) or carbon black.

[0039] The positive electrode binder is mixed with the positive electrode active material and the positive electrode conductive material to bond the components together and assist in particle growth. The binder may be an organic binder, which refers to a binder dissolved or dispersed in an organic solvent, especially N-methylpyrrolidone (NMP), and is distinguished from an aqueous binder using water as a solvent or dispersant. For example, the binder may be selected from the group consisting of: polyvinylidene fluoride (PVDF), vinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HFP), polyvinyl alcohol, starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, polyimide, polyamideimide, polyethylene, polypropylene, ethylene-propylene-diene monomer (EPDM), sulfonated EPDM, styrene-butadiene rubber, and fluororubber, but not limited thereto. In addition, the weight ratios of the above positive electrode active material, positive electrode conductive material, and binder contained in the positive electrode also follow conventional standards.

[0040] The negative electrode may include a negative electrode active material that can be used in a conventional lithium ion secondary battery. For example, the negative electrode active material may include one or more selected from the following: carbon, such as non-graphitizable carbon, graphitic carbon, etc.; metal composite oxides, such as Li x Fe2O3 (0 ≤ x ≤ 1), Li x WO2 (0 ≤ x ≤ 1), Sn x Me 1-x Me' y O z (Me: Mn, Fe, Pb, Ge; Me': Al, B, P, Si, elements of Groups 1, 2, 3 of the periodic table, and halogens; 0 < x ≤ 1; 1 ≤ y ≤ 3; 1 ≤ z ≤ 8); lithium metal; lithium alloy; silicon-based alloy; tin-based alloy; metal oxides, such as SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4, and Bi2O5; conductive polymers, such as polyacetylene; Li-Co-Ni-based materials; titanium oxide; lithium titanium oxide; and so on.

[0041] The solid electrolytes of all-solid-state batteries can be roughly divided into organic (polymer-based) solid electrolytes and mineral-based solid electrolytes. Among them, the types of mineral-based solid electrolytes can be divided into sulfide-based and oxide-based. Currently, the solid electrolyte with the fastest technological development is the sulfide-based solid electrolyte, and its ionic conductivity has developed to be close to the level of organic liquid electrolytes. As described above, among solid electrolytes, sulfide-based solid electrolytes not only have high ionic conductivity, that is, within the range of 10 -3 S / cm to 10 -2 S / cm (high ionic conductivity), but also have excellent thermal stability (thermal stability), and have the advantage of being soft, making their contact with the interface good, which is beneficial to reducing resistance (interface compatibility).

[0042] In the present invention, any of the above solid electrolytes can be used, but sulfide-based solid electrolytes are more preferred. Sulfide-based solid electrolytes may contain a lithium salt, where the lithium salt is an ionizable lithium salt, which can be represented by Li + X - These lithium salts have no particular limitation on the anions, and examples thereof include F - 、Cl - 、Br - 、I - 、NO3 - 、N(CN)2 - 、BF4 - 、ClO4 - 、PF6 - 、(CF3)2PF4 -、(CF3)3PF3 - 、(CF3)4PF2 - 、(CF3)5PF - 、(CF3)6P - CF3SO3 - CF3CF2SO3 - 、(CF3SO2)2N - 、(FSO2)2N - CF3CF2(CF3)2CO - 、(CF3SO2)2CH - 、(SF5)3C - 、(CF3SO2)3C - CF3(CF2)7SO3 - CF3CO2 - 、CH3CO2 - 、SCN - and (CF3CF2SO2)2N - wait.

[0043] In addition, the sulfide-based solid electrolyte may include Li-PS-based glass or Li-PS-based glass-ceramic, which contains sulfur (S) and has the ionic conductivity of a metal belonging to Group 1 or Group 2 of the periodic table. Non-limiting examples of such sulfide-based solid electrolytes include Li2S-P2S5, Li2S-LiI-P2S5, Li2S-LiI-Li2O-P2S5, Li2S-LiBr-P2S5, Li2S-LiCl-P2S5, Li2S-Li2O-P2S5, Li2S-Li3PO4-P2S5, Li2S-P2S5-P2O5, Li2S-P2S5-SiS2, Li2S-P2S5-SnS, Li2S-P2S5-Al2S3, Li2S-GeS2, and Li2S-GeS2-ZnS, etc., and the sulfide-based solid electrolyte may include one or more of these. Furthermore, the sulfide-based solid electrolyte contained as a base material in the solid electrolyte for an all-solid-state battery of the present invention is not limited thereto, and may be composed of a substance constituting a conventional sulfide-based solid electrolyte.

[0044] At the same time, according to the applicant's research results, when the aluminum-containing lead contacts the electrolyte, a lithiation reaction occurs, rendering the battery inoperable. Therefore, the applicant prevents contact between the solid electrolyte and the lead tab for joining the electrode tab in the all-solid-state battery by preventing contact between the lead tab and the solid electrolyte. More specifically, the applicant solved the above problem by setting the end of the lead tab in the direction of joining the electrode tab at a certain distance from the end on the side of the electrode tab of the electrode assembly, and the distance is 1.1 to 5 times, preferably 1.2 to 3 times, and more preferably 1.5 to 2.5 times the average distance between the electrode end and the electrolyte end.

[0045] Figure 3 1 is a top view showing the connection between the electrode tab and the lead tab in the secondary battery. Figure 3 The position of the end of the lead tab in the direction of engagement with the electrode tab will be described in more detail. The position of the end of the lead tab 3a in the direction of engagement with the electrode tab 2 refers to a position spaced apart from the electrode end 5 in the direction of leading out the electrode tab 2, and the distance of the spacing is the distance between the electrode end 5 and the end of the lead tab 3a ( Figure 3 In addition, the average distance between the electrode end 5 and the electrolyte end 7 ( Figure 3 S2) refers to the value obtained by adding the maximum distance and the minimum distance between the electrode terminal 5 and the electrolyte terminal 7 and dividing the sum by 2.

[0046] The present invention also provides a battery module including the all-solid-state battery as a unit cell, a battery pack including the battery module, and a device including the battery pack as a power source. Specific examples of the device include: electric tools driven by electric motors; electric vehicles, including electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs); electric two-wheeled vehicles, including electric bicycles (E-bikes) and electric scooters (E-scooters); electric golf carts; and power storage systems, but are not limited thereto.

[0047] Example

[0048] To illustrate the present invention, embodiments of the present invention are described below, but it will be apparent to those skilled in the art that various changes and modifications may be made within the scope of the present invention and technical ideas, and these changes and modifications fall within the scope of the appended claims.

[0049] [Example 1] Manufacturing of all-solid-state batteries

[0050] First, an electrode assembly is manufactured by stacking unit cells, each comprising a positive electrode containing a lithium transition metal oxide as the positive electrode active material, a lithium metal negative electrode, and a solid electrolyte (Li6PS5Cl) disposed therebetween. The distance from the end of the lead tab in the direction of engagement with the electrode tab to the edge of the electrode assembly where the electrode tab is drawn out is set to twice the average distance between the electrode end and the electrolyte end. An aluminum lead is then bonded to each of the positive and negative electrode tabs.

[0051] [Comparative Example 1] Production of All-Solid-State Batteries

[0052] An all-solid-state battery was manufactured in the same manner as in Example 1, except that a nickel lead was bonded to both the negative electrode tab and the positive electrode tab instead of the aluminum lead.

[0053] [Comparative Example 2] Production of All-Solid-State Batteries

[0054] An all-solid-state battery was manufactured in the same manner as in Example 1 above, except that the distance from the end of the lead tab in the direction of engagement with the electrode tab to the edge of the electrode assembly from which the electrode tab is led is set to 1 times the average distance between the electrode end and the electrolyte end, so that the electrolyte membrane contacts the lead.

[0055] [Experimental Example 1] Evaluation of the performance of all-solid-state batteries

[0056] The all-solid-state batteries manufactured in the above-mentioned Example 1, Comparative Example 1, and Comparative Example 2 were operated under the following charge and discharge conditions at an operating voltage range of 4.25 V to 3.0 V and an operating temperature of 60° C. to evaluate their first cycle ( Figure 1 ) or 100 cycles ( Figure 2 、 Figure 3 ) period, the results are shown in Figures 4 to 6 .

[0057] -Charging conditions: 0.1C, 4.25V, CC / CV, 0.05C cut-off

[0058] -Discharge conditions: 0.1C, 3.0V, CC

[0059] Figure 4 is a graph showing battery performance of examples of the present invention and comparative examples, Figure 5 is a graph showing the life performance of a battery according to an embodiment of the present invention (Example 1). Figure 6 Graph showing the life performance of the battery of the comparative example (Comparative Example 1). The performance of the all-solid-state batteries manufactured in the above-mentioned Example 1, Comparative Example 1 and Comparative Example 2 was evaluated. Figure 4As shown, unlike the all-solid-state battery of Comparative Example 2 in which an aluminum lead was used but the electrolyte membrane and the lead were in contact, the all-solid-state battery of Example 1 in which an aluminum lead was used and the electrolyte membrane and the lead were not in contact was able to charge and discharge normally.

[0060] The all-solid-state battery of Comparative Example 1, which uses nickel leads and has no contact between the electrolyte membrane and the leads, also exhibits similar performance to that of Example 1 in the first cycle. Figure 5 and Figure 6 It can be seen that the performance of the all-solid-state battery of Comparative Example 1 deteriorates rapidly with each cycle, which is caused by performance deviations due to damage to the negative electrode. Therefore, it can be seen that the purpose of the present invention can be achieved simply by using aluminum leads, except that there is no contact between the electrolyte and the lead.

Claims

1. A lead tab for joining an electrode tab, the lead tab being used to join to an electrode tab of an electrode assembly of an all-solid-state battery to form a joining portion, wherein: The lead included in the bonding portion includes aluminum.

2. The lead tab for electrode tab bonding according to claim 1, wherein: The lead wire includes aluminum in an amount of 50 wt % to 100 wt % relative to the total weight of the lead wire.

3. The lead tab for electrode tab bonding according to claim 2, wherein: In the case where the lead wire includes less than 100 wt % of aluminum based on the total weight of the lead wire, the lead wire further includes one selected from the group consisting of copper, manganese, silicon, magnesium, zinc, and nickel.

4. The lead tab for electrode tab bonding according to claim 1, wherein: The lead is in a form in which aluminum is plated on a surface of a metal selected from the group consisting of copper, manganese, silicon, magnesium, zinc, and nickel.

5. The lead tab for electrode tab bonding according to claim 1, wherein: The lead tab is used to connect at least one of a positive electrode tab and a negative electrode tab.

6. The lead tab for electrode tab bonding according to claim 5, wherein: The lead tab is used for joining the positive electrode tab and for joining the negative electrode tab.

7. The lead tab for electrode tab bonding according to claim 1, wherein: The electrode tabs of the electrode assembly of the all-solid-state battery are electrode tabs of the electrode assembly of a sulfide-based all-solid-state battery.

8. An all-solid-state battery comprising: A positive electrode, a negative electrode, and a solid electrolyte disposed between the positive electrode and the negative electrode, wherein the lead tab according to claim 1 is joined to an electrode tab.

9. The all-solid-state battery according to claim 8, wherein: The all-solid-state battery includes a positive lead tab joined to a positive electrode tab and a negative lead tab joined to a negative electrode tab, and one or more leads of the positive and negative lead tabs comprise aluminum and are joined to the electrode tabs.

10. The all-solid-state battery according to claim 8, wherein: The electrolyte does not contact the lead tab included in the all-solid-state battery.

11. The all-solid-state battery according to claim 8, wherein: The distance between the end of the lead tab in the direction of engaging with the electrode tab and the edge of the electrode assembly on the side where the electrode tab is led out is 1.1 to 5 times the average distance between the electrode end and the electrolyte end.

12. The all-solid-state battery according to claim 8, wherein: The all-solid-state battery is a sulfide-based all-solid-state battery.

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