All-solid-state battery

Abstract

The present invention relates to an all-solid-state battery which can be applied to a secondary battery, i.e., a secondary battery using, for example, a solid electrolyte. The present invention provides an all-solid-state battery using a solid electrolyte, the all-solid-state battery comprising: a first electrode layer; a second electrode layer positioned to face the first electrode layer; a first cell region defined between the first electrode layer and the second electrode layer; a second battery region defined between the first electrode layer and the second electrode layer at a position adjacent to the first battery region; and a cathode layer positioned in the first cell region and the second cell region.

Description

Technical Field

[0001] The present disclosure relates to an all-solid-state battery suitable for a secondary battery, that is, a secondary battery using a solid electrolyte, for example. Background Art

[0002] Rechargeable secondary batteries are widely used as high-capacity power storage batteries for applications such as electric vehicles or energy storage systems, and as compact, high-performance energy sources for portable electronic devices such as mobile phones, camcorders, and laptop computers.

[0003] Among secondary batteries, lithium-ion batteries offer advantages in ease of use due to their higher capacity per unit area, lower self-discharge rate, and absence of memory effect compared to nickel-manganese batteries or nickel-cadmium batteries.

[0004] Lithium-ion batteries include a carbon-based negative electrode, an electrolyte containing an organic solvent, and a lithium oxide positive electrode. Lithium-ion batteries are characterized by the fact that during charging, lithium ions are released from the positive electrode and migrate through the electrolyte to the carbon-based negative electrode through chemical reactions occurring at the positive and negative electrodes, and during discharging, a reverse charging process occurs.

[0005] However, because lithium ion batteries use a liquid electrolyte containing an organic solvent, there are various concerns regarding battery stability, such as leakage due to the use of highly volatile organic solvents and damage caused by impact.

[0006] Therefore, in order to ensure the safety of lithium-ion batteries, research is being actively conducted on all-solid-state batteries that use solid electrolytes instead of liquid electrolytes.

[0007] Because such all-solid-state batteries do not use flammable organic solvents within the battery, safety devices can be simplified, and manufacturing costs and productivity can be advantageous. In addition, all-solid-state batteries using sulfide-based solid electrolytes can offer the advantage of excellent lithium ion conductivity.

[0008] However, compared with conventional lithium-ion batteries using liquid electrolytes, all-solid-state batteries have limitations in energy density and output performance. Therefore, to overcome these limitations, improvements are needed in various aspects, including material and structural design.

[0009] Figure 1 Schematic diagram of a typical all-solid-state battery. A typical all-solid-state battery generally includes a positive electrode layer (or cathode layer) 10, a solid electrolyte layer 20, and a negative electrode layer (or anode layer) 30. The positive electrode layer 10, the solid electrolyte layer 20, and the negative electrode layer 30 may be disposed between a first electrode 40 and a second electrode 50.

[0010] The positive electrode layer 10 may include a positive electrode active material (positive electrode material or cathode material) 11 and a solid electrolyte 12 , and may further include a conductive material (not shown) and a binder 13 .

[0011] The solid electrolyte layer 20 may include a solid electrolyte 21 .

[0012] Similar to the positive electrode layer 10, the negative electrode layer 30 may include a negative electrode active material 31. In addition, the negative electrode layer 30 may further include a conductive material and a binder.

[0013] This all-solid-state battery is a battery system that replaces the organic electrolyte of commercial lithium secondary batteries with a solid electrolyte, and employs materials with high conductivity and flame retardancy, thereby providing not only enhanced safety but also high energy density and high output density.

[0014] Unlike liquid-based batteries, all-solid-state batteries use a solid electrolyte that also serves as a separator. Furthermore, by using a bipolar stacking method to manufacture high-voltage unit cells, the battery pack structure can be simplified, resulting in a battery system with a simpler structure than conventional lithium-ion batteries.

[0015] However, due to electrochemical side reactions during initial charge and discharge, mobile lithium participating in the reversible reaction is consumed, and the number of effective lithium ions decreases rapidly even during the first discharge, resulting in a decrease in electrode energy.

[0016] Therefore, gaps may be formed between the active material particles and the electrolyte. Therefore, the volume of the battery may increase, and the interface resistance between the active material particles and the electrolyte may increase.

[0017] Therefore, a solution is needed to address these problems. Summary of the Invention

[0018] Technical issues

[0019] One aspect of the present disclosure is to provide an all-solid-state battery capable of solving various interface problems that may occur in the all-solid-state battery.

[0020] In one example, an all-solid-state battery capable of mitigating formation of voids between a positive electrode active material and an electrolyte is provided.

[0021] In addition, an all-solid-state battery capable of alleviating interface formation between a positive electrode active material and a positive electrode is provided.

[0022] In addition, an all-solid-state battery capable of alleviating the formation of voids between a negative electrode active material and an electrolyte is provided.

[0023] In addition, an all-solid-state battery capable of reducing interface formation between a negative electrode active material and a negative electrode is provided.

[0024] Technical Solution

[0025] According to the first aspect for achieving the above-mentioned purpose, the all-solid-state battery using a solid electrolyte disclosed in the present invention includes: a first electrode layer; a second electrode layer, which is arranged opposite to the first electrode layer; a first battery region, which is defined between the first electrode layer and the second electrode layer; a second battery region, which is defined between the first electrode layer and the second electrode layer at a position adjacent to the first battery region; and a positive electrode layer, which is arranged in the first battery region and the second battery region.

[0026] In an exemplary embodiment, the first cell region and the second cell region may be repeatedly disposed in a direction parallel to the first electrode layer or the second electrode layer.

[0027] In an exemplary embodiment, a pair of the first and second cell regions may be defined by a first partition wall extending from one of the first and second electrodes.

[0028] In example embodiments, the first partition wall may be formed to be connected to the first electrode.

[0029] In an exemplary embodiment, the negative electrode material (or anode material) may be disposed between the first cell region and the second cell region.

[0030] In exemplary embodiments, the negative electrode material may be provided between the first electrode layer and the second electrode layer in the form of a partition wall.

[0031] In exemplary embodiments, the negative electrode material may be disposed on the second separator wall connected to the second electrode layer.

[0032] In exemplary embodiments, at least one of the first cell region or the second cell region may be defined between the negative electrode material and the first separator wall.

[0033] In exemplary embodiments, stress generated during charge and discharge may be offset in at least one of the first separator wall or the negative electrode material.

[0034] In exemplary embodiments, the electrolyte layer may be provided on at least one side surface of the negative electrode material.

[0035] In exemplary embodiments, an insulating adhesive layer may be provided between the first electrode layer and the negative electrode material.

[0036] In example embodiments, an insulating layer may be provided on the second electrode layer.

[0037] In exemplary embodiments, the positive electrode layer may include a positive electrode material (or cathode material) in contact with an electrolyte.

[0038] In exemplary embodiments, at least one of the electrolyte or the positive electrode material may be disposed on the elastic core.

[0039] In exemplary embodiments, the elastic core may include polymer particles.

[0040] According to the second aspect for achieving the above-mentioned purpose, the all-solid-state battery using a solid electrolyte disclosed in the present invention includes: a first electrode layer; a second electrode layer, which is arranged opposite to the first electrode layer; a first partition wall, which divides the space between the first electrode layer and the second electrode layer along one direction; a first battery region, which is defined on one side of the first partition wall; a second battery region, which is defined on the opposite side of the first partition wall at a position adjacent to the first battery region; and a positive electrode layer, which is arranged in the first battery region and the second battery region.

[0041] Beneficial effects

[0042] According to the embodiments of the present disclosure, the following effects can be achieved.

[0043] First, according to the embodiment of the present disclosure, the formation of voids between the positive electrode active material and the electrolyte may be alleviated, thereby alleviating an increase in the interface resistance of the positive electrode active material.

[0044] In addition, an increase in the interface resistance between the positive electrode active material and the positive electrode can be alleviated.

[0045] In addition, an increase in interface resistance between the negative electrode active material and the electrolyte can be alleviated.

[0046] In addition, an increase in interface resistance between the negative electrode active material and the negative electrode can be alleviated.

[0047] In addition, according to the embodiments of the present disclosure, additional technical effects not mentioned herein may also be presented, and those skilled in the art will understand this from the entire specification and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a diagram schematically showing the configuration of a general all-solid-state battery.

[0049] Figure 2 is a cross-sectional view schematically showing the configuration of an all-solid-state battery applicable to the present disclosure.

[0050] Figure 3is a cross-sectional view schematically illustrating an expansion phenomenon caused by voids in an all-solid-state battery applicable to the present disclosure.

[0051] Figure 4 is a conceptual diagram illustrating an all-solid-state battery according to an embodiment of the present disclosure.

[0052] Figure 5 is a cross-sectional view showing an all-solid-state battery according to an embodiment of the present disclosure.

[0053] Figure 6 is a cross-sectional view showing a positive electrode layer of an all-solid-state battery according to an embodiment of the present disclosure.

[0054] Figure 7 is a cross-sectional view illustrating a stress cancellation process in an all-solid-state battery according to an embodiment of the present disclosure.

[0055] Figures 8 to 14 is a schematic cross-sectional view illustrating a process of manufacturing an all-solid-state battery according to an embodiment of the present disclosure.

[0056] Figure 15 is a schematic cross-sectional view showing a portion of an all-solid-state battery according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0057] Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or similar components, and redundant descriptions thereof will be omitted. As used herein, the suffixes "module" and "unit" may be added or used interchangeably to facilitate the preparation of this specification and are not intended to imply unique meanings or functions.

[0058] When describing the embodiments disclosed in this specification, in order not to obscure the subject matter of the embodiments disclosed in this specification, the relevant known technologies may not be described in detail. In addition, it should be noted that the drawings are only for facilitating the understanding of the embodiments disclosed in this specification and should not be construed as limiting the technical concepts disclosed in this specification.

[0059] Furthermore, although the drawings are described individually for simplicity, embodiments implemented by combining at least two or more drawings are also within the scope of the present disclosure.

[0060] In addition, when an element such as a layer, region or module is referred to as being “on” another element, it should be understood that the element can be directly on the other element or intervening elements may be present therebetween.

[0061] Figure 2 is a cross-sectional view schematically showing the configuration of an all-solid-state battery applicable to the present disclosure. Figure 3 is a cross-sectional view schematically illustrating an expansion phenomenon caused by voids in an all-solid-state battery applicable to the present disclosure.

[0062] refer to Figure 2 The all-solid-state battery applicable to the present disclosure generally includes a positive electrode layer 10, a solid electrolyte layer 20, and a negative electrode layer 30. The positive electrode layer 10, the solid electrolyte layer 20, and the negative electrode layer 30 may be disposed between a first electrode (first current collector) 40 and a second electrode (second current collector) 50.

[0063] As mentioned above Figure 1 As described above, the positive electrode layer 10 includes a positive electrode active material (positive electrode material or cathode material) 11. In the case of a lithium ion battery, the positive electrode material 11 contains a large amount of lithium ions.

[0064] Unlike liquid batteries, in all-solid-state batteries, the mobile lithium involved in the reversible reaction is consumed due to electrochemical side reactions during the initial charge and discharge. As the charge and discharge are repeated, the number of effective lithium ions decreases rapidly, resulting in a decrease in electrode energy.

[0065] Therefore, as the size of the particles of the positive electrode active material 11 decreases, voids may be formed between the particles of the positive electrode active material 11 and the particles of the solid electrolyte 12. This problem may be referred to as an interface problem.

[0066] During charging and discharging, lithium ions (Li + ) is generated in the positive electrode active material (positive electrode material) 11 and migrates through the solid electrolyte 12. As charge and discharge are repeated, gaps may be formed between the positive electrode material 11 and the solid electrolyte 12. As charge and discharge are repeated, the size of these gaps may increase.

[0067] In liquid batteries, such gaps can be easily filled. However, in all-solid-state batteries, because the electrolyte is in a solid state, such gaps may be difficult to fill. As a result, the migration of lithium ions may be hindered, resulting in increased resistance.

[0068] Additionally, as these voids grow and become more difficult to fill, the overall volume of the battery 1a may increase, e.g. Figure 3 shown.

[0069] In the all-solid-state battery 1 or 1a, the positive electrode layer 10 occupies a relatively large portion of the total volume. Therefore, as charge and discharge are repeated, the size of the voids may increase, which mainly leads to an increase in the volume of the positive electrode layer 10, which may cause an increase in the total volume of the all-solid-state battery 1 or 1a, as shown in FIG. Figure 3This volume expansion generally occurs in a direction toward the positive electrode layer 10 . That is, the volume expansion of the positive electrode layer 10 may generally occur in a direction toward the first electrode (positive electrode) 40 .

[0070] Figure 4 is a conceptual diagram illustrating an all-solid-state battery according to an embodiment of the present disclosure.

[0071] refer to Figure 4 , schematically illustrating a concept for solving the above-mentioned problem caused by the formation of voids throughout the all-solid-state batteries 1a and 1b.

[0072] As described above, the volume expansion generally occurs in the direction toward the positive electrode layer 10. That is, the volume expansion of the positive electrode layer 10 may generally occur in the direction toward the first electrode (positive electrode) 40.

[0073] Therefore, according to the embodiment of the present disclosure, the plurality of unit all-solid-state batteries 1 a and 1 b may be configured such that their respective volume expansions occur toward each other, thereby allowing the volume expansions to be offset.

[0074] For example, the first all-solid-state battery 1a and the second all-solid-state battery 1b can be configured to face each other. Specifically, if the positive electrode layer of the first all-solid-state battery 1a and the positive electrode layer of the second all-solid-state battery 1b are arranged to face each other, the all-solid-state batteries 1a and 1b can apply pressure to each other due to their respective volume expansion, thereby allowing the volume expansion to be offset. In addition, if the all-solid-state batteries 1a and 1b apply pressure to each other due to their respective volume expansion, the voids formed during charging and discharging can be eliminated or reduced by this pressure.

[0075] Figure 5 is a cross-sectional view showing an all-solid-state battery according to an embodiment of the present disclosure.

[0076] refer to Figure 5 , the all-solid-state battery 100 using a solid electrolyte according to an embodiment of the present disclosure may include a first electrode layer 500 and a second electrode layer 510 disposed opposite to the first electrode layer 500 .

[0077] The first electrode layer 500 and the second electrode layer 510 disposed opposite to each other may have a relatively large area compared to the distance therebetween. Figure 5 , but the first electrode layer 500 and the second electrode layer 510 disposed opposite to each other may have a square or rectangular shape. Figure 5 The configuration shown may be part of the entire all-solid-state battery 100 .

[0078] A first cell region 110 and a second cell region 120 adjacent to each other may be defined between the first electrode layer 500 and the second electrode layer 510. The positive electrode layer 200 may be provided in the first cell region 110 and the second cell region 120.

[0079] As shown in the figure, the first cell region 110 and the second cell region 120 may be repeatedly arranged in a direction parallel to the first electrode layer 500 or the second electrode layer 510 .

[0080] In this case, a combination of the first cell region 110 and the second cell region 120 may be defined by a first partition wall 520 extending from one of the first electrode 500 and the second electrode 510 .

[0081] In this manner, the first partition walls 520 can divide the space between the first electrode layer 500 and the second electrode layer 510 in one direction. In this case, the first cell region 110 can be defined on one side of each of the first partition walls 520, and the second cell region 120 can be defined on the other side of each of the first partition walls 520. In addition, the first cell region 110 and the second cell region 120 can be filled with the positive electrode layer 200.

[0082] In an exemplary embodiment, reference Figure 5 , the first partition walls 520 may extend from the first electrode 500. That is, the first partition walls 520 may be provided at regular intervals on the first electrode 500. In one example, the first partition walls 520 may protrude in a direction perpendicular to a plane direction of the first electrode 500.

[0083] refer to Figure 5 A combination of the first and second cell regions 110 and 120 or a pair of the first and second cell regions 110 and 120 may be provided between adjacent first partition walls 520. Since the positive electrode layer 200 is provided in the first and second cell regions 110 and 120, expansion of the positive electrode layer 200 caused by charging and discharging can be offset. This will be described in detail later.

[0084] Furthermore, a negative electrode material (or anode material) 400 may be provided between the first cell region 110 and the second cell region 120. The negative electrode material 400 may be provided between the first electrode layer 500 and the second electrode layer 510 in the form of a partition wall. For example, the negative electrode material 400 may have the same meaning as the negative electrode layer described above. Thus, at least one of the first cell region 110 or the second cell region 120 may be defined between the negative electrode material 400 and the first partition wall 520.

[0085] As described above, in the exemplary embodiment, the combination of the first cell region 110 and the second cell region 120 may be arranged between the first partition wall 520, and the negative electrode material 400 in the form of a partition wall may be arranged between the first cell region 110 and the second cell region 120 to separate the first cell region 110 and the second cell region 120. Adjacent first cell regions 110 and second cell regions 120 may be arranged symmetrically with respect to each other, with the partition wall-shaped negative electrode material 400 interposed therebetween. Furthermore, the first cell region 110 and the second cell region 120 may be repeatedly arranged along the planar direction of the first electrode layer 500 and the second electrode layer 510.

[0086] Due to the above-described structure of the battery, stress generated during charge and discharge may be offset in at least one of the first partition wall 520 or the partition wall-shaped negative electrode material 400 .

[0087] In addition, the electrolyte layer 310 may be provided on the negative electrode material 400. That is, the electrolyte layers 311 and 312 may be provided on at least one side surface of the negative electrode material 400. Specifically, the first electrolyte layer 311 may be provided on the first surface of the partition wall-shaped negative electrode material 400, and the second electrolyte layer 312 may be provided on the second surface of the negative electrode material 400. In this case, the positive electrode layer 200 may be in contact with the electrolyte layer 310. In addition, the positive electrode layer 200 may include the positive electrode material 210 in contact with the electrolyte layer 310 (see Figure 6 ).

[0088] Furthermore, in the above structure, the insulating adhesive layer 600 may be provided between the first electrode layer 500 and the negative electrode material 400. That is, the insulating adhesive layer 600 may be provided on the lower surface of the first electrode layer 500. In other words, the first electrode layer 500 and the positive electrode layer 200 may be insulated from each other by the insulating adhesive layer 600. The insulating adhesive layer 600 may be in contact with the first partition wall 520.

[0089] In addition, the insulating layer 620 may be provided on the upper surface of the second electrode layer 510. The insulating layer 620 may be in contact with the first partition wall 520. Therefore, the second electrode layer 510 and the positive electrode layer 200 may be insulated from each other by the insulating layer 620.

[0090] Thus, one side of the positive electrode layer 200 may contact the first separation wall 520 connected to the first electrode layer 500 , and the other side of the positive electrode layer 200 may contact the electrolyte layer 310 disposed on the negative electrode material 400 .

[0091] Alternatively, the structure associated with the first electrode layer 500 and the structure associated with the second electrode layer 510 may be separately manufactured and then bonded to each other. In this case, the insulating adhesive layer 600 may allow these upper and lower structures to adhere to each other and remain bonded. This will be described in detail later.

[0092] Figure 6 is a cross-sectional view showing a positive electrode layer of an all-solid-state battery according to an embodiment of the present disclosure.

[0093] refer to Figure 6 , the positive electrode layer 200 may include a positive electrode material 210 and an electrolyte 220. In an exemplary embodiment, at least one of the electrolyte 220 or the positive electrode material 210 may be disposed on an elastic core 230. The elastic core 230 may include polymer particles.

[0094] The elastic core 230 may be elastically deformed in response to expansion and contraction of the positive electrode material 210 caused by charge and discharge.

[0095] The electrolyte 220 may have a thickness sufficient to cover the outer surface of the elastic core 230. In this way, the positive electrode material 210 and the electrolyte 220 may continuously cover the outer surface of the elastic core 230.

[0096] Due to the configuration of the elastic core 230 , the possibility of void formation between the positive electrode material 210 and the electrolyte 220 in the positive electrode layer 200 can be significantly reduced, thereby resolving interface issues that typically occur in all-solid-state batteries.

[0097] In other words, in a typical all-solid-state battery, during charge and discharge, voids may form between the positive electrode material 210 and the electrolyte 220, which may lead to an increase in interfacial resistance. However, due to the elasticity of the elastic core 230, the contact between the positive electrode material 210 and the electrolyte 220 can be fixed and maintained, thereby effectively solving this interfacial problem.

[0098] When an external force is applied or deformation occurs, the elastic core 230 may be compressed and reduced in size due to the elasticity of the elastic core 230. During this process, contact between the positive electrode material 210 and the electrolyte 220 may be maintained.

[0099] Additionally, when the externally applied force is removed or reduced, the elastic core 230 may restore its original size, thereby maintaining contact between the positive electrode material 210 and the electrolyte 220 .

[0100] This removal or reduction of the externally applied force may occur when the size of the positive electrode material 210 is reduced due to the generation of lithium ions. This may also occur when ions including lithium ions are released from the positive electrode material 210.

[0101] Figure 7 is a cross-sectional view illustrating a stress cancellation process in an all-solid-state battery according to an embodiment of the present disclosure.

[0102] As described above, in the all-solid-state battery 100, during charging and discharging, expansion and contraction may occur in the positive electrode layer 200, which may act as stress. In addition, during this process, voids may be formed between the positive electrode material 210 and the electrolyte 220. These voids may be included in the positive electrode layer 200, and this phenomenon may cause expansion of the all-solid-state battery 100.

[0103] refer to Figure 7 , the direction in which stress is generated during charging and discharging of the all-solid-state battery 100 according to an embodiment of the present disclosure is indicated by an arrow. Figure 7 In FIG. 1 , the arrows indicate stress caused by expansion mainly due to the formation of voids. If contraction occurs in the positive electrode layer 200 during charge and discharge, the direction of the arrows may be different from the direction of the positive electrode layer 200. Figure 7 The directions shown are opposite.

[0104] During the charge and discharge of the all-solid-state battery 100, stress may act on at least one of the first partition wall 520 or the partition wall-shaped negative electrode material 400. As described above, during the charge and discharge of the all-solid-state battery 100, stress may be generated mainly by the action of the positive electrode layer 200. This stress may act in a direction parallel to the first electrode layer 500 and the second electrode layer 510. Therefore, stress may act on at least one of the first partition wall 520 or the partition wall-shaped negative electrode material 400.

[0105] In this case, the stress generated in the all-solid-state battery 100 during charging and discharging can be offset between the adjacent battery regions 110 and 120. Specifically, the stress generated in the first battery region 110 and the stress generated in the second battery region 120 can be offset. That is, the stress can act in opposite directions on at least one of the first partition wall 520 or the partition wall-shaped negative electrode material 400 and can be offset.

[0106] More specifically, the stress generated in the first cell region 110 may act toward the second cell region 120, and the stress generated in the second cell region 120 may act toward the first cell region 110. Therefore, the stress generated in the first cell region 110 and the stress generated in the second cell region 120 may offset each other.

[0107] Through this process, the expansion directions may face each other, and thus, a void between the positive electrode material 210 and the electrolyte 220 , which may be included in the positive electrode layer 200 , may be eliminated or reduced.

[0108] Figures 8 to 14 is a schematic cross-sectional view illustrating a process of manufacturing an all-solid-state battery according to an embodiment of the present disclosure.

[0109] In the following, reference will be made to Figures 8 to 14 A process of manufacturing an all-solid-state battery according to an embodiment of the present disclosure is described in detail.

[0110] As described above, the structure associated with the first electrode layer 500 (the upper structure 102 ) and the structure associated with the second electrode layer 510 (the lower structure 101 ) may be separately manufactured and then bonded to each other.

[0111] First, refer to Figures 8 to 10 The structure associated with the second electrode layer 510 (lower structure 101 ) is described.

[0112] refer to Figure 8 , the partition wall-shaped negative electrode material 400 may be formed on the second electrode layer 510. The partition wall-shaped negative electrode material 400 may be formed at regular intervals on the second electrode layer 510. Therefore, the negative electrode material 400 may be repeatedly disposed along the plane direction of the second electrode layer 510.

[0113] The interval between the partition wall-shaped negative electrode materials 400 may correspond to the width of a region including a combination of the first cell region 110 and the second cell region 120 .

[0114] Then, refer to Figure 9 , an insulating layer 620 may be formed on the second electrode layer 510. The insulating layer 620 may prevent electrical contact between the second electrode layer 510 and the positive electrode layer 200.

[0115] The insulating layer 620 may be formed on the second electrode layer 510 in regions corresponding to the first cell region 110 and the second cell region 120 .

[0116] Then, refer to Figure 10 , the electrolyte layer 310 may be formed on both surfaces of the partition wall-shaped negative electrode material 400. Specifically, the first electrolyte layer 311 may be formed on the first surface of the partition wall-shaped negative electrode material 400, and the second electrolyte layer 312 may be formed on the second surface of the negative electrode material 400.

[0117] Through the above process, the lower structure 101 associated with the second electrode layer 510 may be manufactured.

[0118] Then, reference will be made to Figure 11 and Figure 12 The structure associated with the first electrode layer 500 (upper structure 101 ) is described.

[0119] refer to Figure 11 , the first electrode layer 500 including the first partition walls 520 may be formed. Specifically, the first electrode layer 500 may be formed such that the first partition walls 520 are arranged at regular intervals. The first partition walls 520 may be formed to extend in one direction.

[0120] In this way, the first partition walls 520 may be repeatedly provided along the planar direction of the first electrode layer 500. An interval between the first partition walls 520 may correspond to a width of a region including a combination of the first cell region 110 and the second cell region 120.

[0121] Then, refer to Figure 12 , an insulating adhesive layer 600 may be formed on the first electrode layer 500. The insulating adhesive layer 600 may prevent electrical contact between the first electrode layer 500 and the positive electrode layer 200.

[0122] The insulating adhesive layer 600 may be formed on the second electrode layer 510 in regions corresponding to the first cell region 110 and the second cell region 120 .

[0123] Through the above process, the upper structure 102 associated with the first electrode layer 500 may be manufactured.

[0124] The insulating adhesive layer 600 may allow the lower structure 101 and the upper structure 102 to adhere to each other and maintain an adhered state. That is, the lower structure 101 and the upper structure 102 may be fixed by the insulating adhesive layer 600 .

[0125] refer to Figure 13 In the lower structure 101, the first cell region 110 and the second cell region 120 defined by the partition wall-shaped negative electrode material 400 may be filled with the positive electrode layer 200. As described above, the first electrolyte layer 311 may be provided on the first surface of the partition wall-shaped negative electrode material 400, and the second electrolyte layer 312 may be provided on the second surface of the negative electrode material 400. The positive electrode layer 200 may be provided in contact with the electrolyte layers 311 and 312.

[0126] refer to Figure 14, the upper structure 102 described above may be bonded to the lower structure 101. In this case, bonding may be performed so that each of the first partition walls 520 of the upper structure 102 is disposed between two negative electrode materials 400. In one example, the upper structure 102 may be bonded to the lower structure 101 so that each of the first partition walls 520 is disposed at a central position between two adjacent negative electrode materials in the negative electrode materials 400.

[0127] During this process, the first separator 520 may penetrate the positive electrode layer 200 to contact the insulating layer 620 of the lower structure 101 , and the upper portions of the positive electrode layer 200 , the electrolyte layer 310 , and the negative electrode material 400 may contact and be fixed to the insulating adhesive layer 600 .

[0128] In this way, when the upper structure 102 is joined to the lower structure 101, a Figure 5 An all-solid-state battery 100 having the structure shown.

[0129] Figure 15 is a schematic cross-sectional view showing a portion of an all-solid-state battery according to another embodiment of the present disclosure.

[0130] The second electrode layer 510 may include a portion extending upward, or a second partition wall 511 made of the same material as the second electrode layer 510 may be formed on the second electrode layer 510. In addition, the negative electrode material 410 may be formed on a surface of the second partition wall 511.

[0131] That is, instead of using the above-described partition wall-shaped negative electrode material 400 , the negative electrode material 410 may be formed on the surface of the second partition wall 511 .

[0132] As such, the negative electrode material 410 may be disposed on the second partition wall 511 connected to the second electrode layer 510 .

[0133] With this structure, the efficiency of collecting electrons generated in the positive electrode layer 200 to the second electrode layer (current collector) 510 via the negative electrode material 410 can be improved.

[0134] The above description is provided only as an example to illustrate the present invention, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the essential characteristics of the present invention.

[0135] Therefore, the embodiments disclosed herein are intended to illustrate but not limit the scope of the present invention, and the scope of the present invention should not be interpreted as being limited by these embodiments.

[0136] The protection scope of the present invention should be defined by the claims, and all modifications or equivalents falling within the scope of the claims should be construed as being included in the scope of the present invention.

[0137] Industrial Applicability

[0138] According to the present disclosure, an all-solid-state battery as a secondary battery using a solid electrolyte can be provided.

Claims

1. An all-solid-state battery using a solid electrolyte, the all-solid-state battery comprising: a first electrode layer; a second electrode layer, the second electrode layer being arranged opposite to the first electrode layer; a first battery region defined between the first electrode layer and the second electrode layer; a second battery region defined between the first electrode layer and the second electrode layer at a position adjacent to the first battery region; as well as A positive electrode layer is provided in the first battery region and the second battery region.

2. The all-solid-state battery according to claim 1, wherein: The first battery region and the second battery region are repeatedly arranged in a direction parallel to the first electrode layer or the second electrode layer.

3. The all-solid-state battery according to claim 2, wherein: A pair of the first and second cell regions is defined by a first partition wall extending from one of the first electrode and the second electrode.

4. The all-solid-state battery according to claim 3, wherein: The first partition wall is formed to be connected to the first electrode. 5 . The all-solid-state battery according to claim 1 , comprising a negative electrode material disposed between the first battery region and the second battery region.

6. The all-solid-state battery according to claim 5, wherein: The negative electrode material is provided between the first electrode layer and the second electrode layer in the form of a partition wall.

7. The all-solid-state battery according to claim 5, wherein: The negative electrode material is disposed on a second separator wall connected to the second electrode layer.

8. The all-solid-state battery according to claim 5, wherein: At least one of the first cell region or the second cell region is defined between the negative electrode material and the first separator wall.

9. The all-solid-state battery according to claim 5, wherein: Stress generated during charge and discharge of the all-solid-state battery is counteracted in at least one of the first separator wall or the negative electrode material. 10 . The all-solid-state battery according to claim 5 , comprising an electrolyte layer provided on at least one side surface of the negative electrode material.

11. The all-solid-state battery according to claim 1, wherein: The positive electrode layer includes a positive electrode material in contact with an electrolyte.

12. The all-solid-state battery according to claim 11, wherein: At least one of the electrolyte or the positive electrode material is disposed on an elastic core.

13. An all-solid-state battery using a solid electrolyte, the all-solid-state battery comprising: a first electrode layer; a second electrode layer, the second electrode layer being arranged opposite to the first electrode layer; a first partition wall, the first partition wall dividing the space between the first electrode layer and the second electrode layer along one direction; a first battery region defined on one side of the first partition wall; a second battery region defined on an opposite side of the first partition wall at a position adjacent to the first battery region; as well as A positive electrode layer is provided in the first battery region and the second battery region.

14. The all-solid-state battery according to claim 13, wherein: The first battery region and the second battery region are repeatedly arranged in a direction parallel to the first electrode layer or the second electrode layer.

15. The all-solid-state battery according to claim 13, wherein: The first partition wall is formed to be connected to the first electrode. 16 . The all-solid-state battery according to claim 13 , comprising a negative electrode material disposed between the first battery region and the second battery region.

17. The all-solid-state battery according to claim 16, wherein: The negative electrode material is provided between the first electrode layer and the second electrode layer in the form of a partition wall.

18. The all-solid-state battery according to claim 16, wherein: The negative electrode material is disposed on a second separator wall connected to the second electrode.

19. The all-solid-state battery according to claim 16, wherein: At least one of the first cell region or the second cell region is defined between the negative electrode material and the first separator wall. 20 . The all-solid-state battery according to claim 16 , comprising an electrolyte layer provided on at least one side surface of the negative electrode material.

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