Coating apparatus, electrode manufacturing apparatus, and method for manufacturing electrode

Abstract

The invention relates to a coating apparatus, an electrode manufacturing apparatus, and a method for manufacturing an electrode. The coating apparatus may include: a separation section configured to separate a composite substrate including a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate; a first slurry nozzle located at one side of the separation portion and configured to apply slurry onto the first surface of the first substrate; and a second slurry nozzle located at the other side of the separation portion and configured to apply another slurry onto the first surface of the second substrate. The electrode manufacturing apparatus may include the coating apparatus.

Description

Technical Field

[0001] This disclosure relates to a coating apparatus, an electrode manufacturing apparatus including the coating apparatus, and a method for manufacturing electrodes. More specifically, this disclosure relates to a coating apparatus for applying a slurry together onto multiple substrates, and an electrode manufacturing apparatus including the coating apparatus. Background Technology

[0002] Unlike primary batteries, which are not designed for recharging, secondary (also known as rechargeable) batteries are designed to discharge and recharge. Low-capacity secondary batteries are widely used in portable small electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for driving motors in hybrid and electric vehicles, as well as for storing electricity (e.g., household and / or utility-scale power storage). A secondary battery typically includes an electrode assembly containing positive and negative electrodes, a housing that houses the electrode assembly, and electrode terminals connected to the electrode assembly.

[0003] Electrode fabrication is a critical operation in the manufacture of secondary batteries. It is known that electrode fabrication can involve efficiency and cost issues. For example, drying the slurry can be time-consuming and costly. Furthermore, it is necessary to reduce the thickness of the electrode substrate to increase the energy density of the secondary battery or improve the productivity of electrode fabrication. However, as the substrate becomes thinner, the battery's durability decreases, which can lead to poor driving stability.

[0004] The information disclosed in this Background section is intended to enhance understanding of the background of this disclosure. This section may contain information that does not constitute related (or prior art). Summary of the Invention

[0005] Embodiments of this disclosure provide a coating apparatus and an electrode manufacturing apparatus including the coating apparatus.

[0006] Embodiments of this disclosure provide a coating apparatus, the coating apparatus comprising: a separation section configured to separate a first substrate and a second substrate in a composite substrate, the composite substrate including the first substrate, the second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate; a first slurry nozzle located on one side of the separation section and configured to apply a first slurry to the first surface of the first substrate; and a second slurry nozzle located on the other side of the separation section and configured to apply a second slurry to the first surface of the second substrate.

[0007] Embodiments of this disclosure provide a coating apparatus comprising: a separation section configured to separate a composite substrate including a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate; a first slurry nozzle located on one side of the separation section and configured to apply a third slurry to the first surface of the first substrate; and a second slurry nozzle located on the other side of the separation section and configured to apply a fourth slurry to the first surface of the second substrate.

[0008] According to some embodiments of this disclosure, the separation section may be configured to separate the first substrate and the second substrate, to place a first partial functional layer, which is part of the central functional layer, on the first surface of the first substrate and to place a second partial functional layer, which is another part of the central functional layer, on the first surface of the second substrate, the first slurry nozzle may be configured to apply the first slurry to one surface of the first partial functional layer, and the second slurry nozzle may be configured to apply the second slurry to one surface of the second partial functional layer.

[0009] In one embodiment, the separation section is configured to separate the central functional layer to form a first partial functional layer on the first surface of the first substrate and a second partial functional layer on the first surface of the second substrate, wherein the first slurry nozzle is configured to apply the third slurry to the exposed surface of the first partial functional layer, and wherein the second slurry nozzle is configured to apply the fourth slurry to the exposed surface of the second partial functional layer.

[0010] According to some embodiments of this disclosure, the separation portion can be configured to divide the central functional layer to form a first partial functional layer and a second partial functional layer having the same thickness.

[0011] In one embodiment, the first partial functional layer and the second partial functional layer have substantially the same thickness.

[0012] According to some embodiments of this disclosure, the coating apparatus may further include a buffer portion located at the end of the separation portion and configured to contact the central functional layer.

[0013] In one embodiment, the coating apparatus further includes a buffer portion located at the end of the separating portion and configured to contact the central functional layer.

[0014] According to some embodiments of this disclosure, the first slurry nozzle may be positioned above the second slurry nozzle relative to the direction of gravity, the first slurry nozzle may be configured to apply the first slurry in a direction opposite to the direction of gravity, and the second slurry nozzle may be configured to apply the second slurry in the direction of gravity.

[0015] In one embodiment, the first slurry nozzle is positioned above the second slurry nozzle relative to the direction of gravity, the first slurry nozzle is configured to apply the third slurry in a direction opposite to the direction of gravity, and the second slurry nozzle is configured to apply the fourth slurry in the direction of gravity.

[0016] According to some embodiments of this disclosure, the application speed of the first slurry through the first slurry nozzle may be different from the application speed of the second slurry through the second slurry nozzle.

[0017] In one embodiment, the application rate of the third slurry via the first slurry nozzle is different from the application rate of the fourth slurry via the second slurry nozzle.

[0018] According to some embodiments of this disclosure, the coating apparatus may further include a slurry channel configured to supply slurry to the first slurry nozzle and the second slurry nozzle in parallel.

[0019] In one embodiment, the coating apparatus may further include a slurry channel configured to supply the third slurry to both the first slurry nozzle and the second slurry nozzle when the fourth slurry is unavailable.

[0020] According to some embodiments of this disclosure, the coating apparatus may further include: a first slurry dispensing channel configured to supply the first slurry to the first slurry nozzle; and a second slurry dispensing channel configured to supply the second slurry to the second slurry nozzle.

[0021] In one embodiment, the coating apparatus further includes: a first slurry dispensing channel configured to supply the third slurry to the first slurry nozzle; and a second slurry dispensing channel configured to supply the fourth slurry to the second slurry nozzle.

[0022] Embodiments of this disclosure provide an electrode manufacturing apparatus, the electrode manufacturing apparatus comprising: a conveying unit configured to convey a composite substrate including a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate; and a coating apparatus comprising: a separating unit configured to separate the first substrate and the second substrate of the conveyed composite substrate; a first slurry nozzle located on one side of the separating unit and configured to apply a first slurry to the first surface of the first substrate; and a second slurry nozzle located on the other side of the separating unit and configured to apply a second slurry to the first surface of the second substrate.

[0023] Embodiments of this disclosure provide an electrode manufacturing apparatus, the electrode manufacturing apparatus comprising: a conveying unit configured to convey a composite substrate including a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate; and a coating apparatus comprising: a separating unit configured to separate the composite substrate; a first slurry nozzle located on one side of the separating unit and configured to apply a third slurry to the first surface of the first substrate; and a second slurry nozzle located on the other side of the separating unit and configured to apply a fourth slurry to the first surface of the second substrate.

[0024] According to some embodiments of this disclosure, the electrode manufacturing apparatus may further include a control unit configured to move the coating apparatus upward or downward relative to the direction of gravity.

[0025] In one embodiment, the electrode manufacturing apparatus further includes a control unit configured to move the coating apparatus upward or downward relative to the direction of gravity.

[0026] According to some embodiments of this disclosure, the electrode manufacturing apparatus may further include: a first slit coater configured to apply a third slurry to a second surface of the first substrate; and a second slit coater configured to apply a fourth slurry to a second surface of the second substrate.

[0027] In one embodiment, the electrode manufacturing apparatus further includes: a first slit coater configured to apply a first slurry to a second surface of the first substrate; and a second slit coater configured to apply a second slurry to the second surface of the second substrate.

[0028] According to some embodiments of this disclosure, the electrode manufacturing apparatus may further include a first drying device configured to dry the composite substrate comprising the first substrate coated with the third slurry and the second substrate coated with the fourth slurry before the first substrate and the second substrate are separated by the separation portion.

[0029] In one embodiment, the electrode manufacturing apparatus further includes a first drying device located in front of the separation section and configured to dry the composite substrate comprising a first substrate coated with the first slurry and a second substrate coated with the second slurry.

[0030] According to some embodiments of this disclosure, the electrode manufacturing apparatus may further include a second drying device configured to dry together the first substrate coated with the first slurry and the second substrate coated with the second slurry.

[0031] In one embodiment, the electrode manufacturing apparatus further includes a second drying device configured to dry the first substrate coated with the third slurry and to dry the second substrate coated with the fourth slurry.

[0032] According to some embodiments of this disclosure, the electrode manufacturing apparatus may further include: a third drying device configured to dry the first substrate coated with the first slurry; and a fourth drying device configured to dry the second substrate coated with the second slurry.

[0033] In one embodiment, the electrode manufacturing apparatus further includes: a second drying device configured to dry the first substrate coated with the third slurry; and a third drying device configured to dry the second substrate coated with the fourth slurry.

[0034] According to some embodiments of this disclosure, the electrode manufacturing apparatus may further include: a first blower configured to supply air to the first surface of the first substrate coated with the first slurry; and a second blower configured to supply air to the first surface of the second substrate coated with the second slurry.

[0035] In one embodiment, the electrode manufacturing apparatus further includes: a first blower configured to supply air to the first surface of the first substrate coated with the third slurry; and a second blower configured to supply air to the first surface of the second substrate coated with the fourth slurry.

[0036] Embodiments of this disclosure provide an electrode manufacturing method, the electrode manufacturing method comprising: conveying a composite substrate including a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate via a conveying section; separating the first substrate and the second substrate of the conveyed composite substrate via a separation section included in a coating apparatus; applying a first slurry to the first surface of the first substrate via a first slurry nozzle included in the coating apparatus and located on one side of the separation section; and applying a second slurry to the first surface of the second substrate via a second slurry nozzle included in the coating apparatus and located on the other side of the separation section.

[0037] Embodiments of this disclosure provide a method for manufacturing an electrode, the method comprising: conveying a composite substrate including a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate; separating the composite substrate via a coating apparatus; applying a third slurry to the first surface of the first substrate; and applying a fourth slurry to the first surface of the second substrate.

[0038] According to some embodiments of this disclosure, the electrode manufacturing method may further include applying a third slurry to the second surface of the first substrate using a first slit coater and applying a fourth slurry to the second surface of the second substrate using a second slit coater.

[0039] In one embodiment, the method further includes: applying a first slurry to a second surface of the first substrate; and applying a second slurry to a second surface of the second substrate.

[0040] According to some embodiments of this disclosure, the electrode manufacturing method may further include: drying the composite substrate, comprising the first substrate coated with the third slurry and the second substrate coated with the fourth slurry, by a first drying device before the first substrate and the second substrate are separated by the separation portion.

[0041] In one embodiment, the method further includes: drying the composite substrate comprising the first substrate coated with the first slurry and the second substrate coated with the second slurry prior to the separation.

[0042] According to some embodiments of this disclosure, the electrode manufacturing method may further include drying the first substrate coated with the first slurry and the second substrate coated with the second slurry together using a second drying device.

[0043] In one embodiment, the method further includes: drying both the first substrate coated with the third slurry and the second substrate coated with the fourth slurry together.

[0044] According to some embodiments of this disclosure, the electrode manufacturing method may further include: drying the first substrate coated with the first slurry using a third drying device; and drying the second substrate coated with the second slurry using a fourth drying device.

[0045] In one embodiment, the method further includes: drying the first substrate coated with the third slurry and the second substrate coated with the fourth slurry, respectively.

[0046] According to various embodiments of this disclosure, the coating apparatus is a single device and can separate the first substrate and the second substrate and perform coating together on the first substrate and the second substrate.

[0047] This can increase the space utilization of the process and improve productivity.

[0048] According to various embodiments of this disclosure, the central functional layer can be segmented after the mixing portion is disposed on the two surfaces. The disposed mixing portion can enhance the rigidity of the first substrate and the second substrate, which are separated from each other. As a result, the first substrate and the second substrate are separated from each other, and thus damage to the first substrate and the second substrate can be prevented.

[0049] According to various embodiments of this disclosure, each substrate included in a composite substrate can be relatively thin compared to the case of using only a single substrate. Because the electrode manufacturing apparatus uses thin substrates to manufacture electrodes, electrodes with high energy density can be manufactured. Furthermore, because the composite substrate is used in the early stages of electrode manufacturing, the initial stability of the composite substrate's movement can be increased.

[0050] According to various embodiments of this disclosure, the uniformity of the quality of electrodes using a first substrate coated with a first slurry and a third slurry and a second substrate coated with a second slurry and a fourth slurry can be ensured.

[0051] According to various embodiments of this disclosure, electrode manufacturing equipment can increase the space utilization rate of electrode manufacturing processes. Attached Figure Description

[0052] The accompanying drawings illustrate embodiments of the present disclosure and, together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. Therefore, the present disclosure should not be construed as limited to the drawings:

[0053] Figure 1 A portion of an electrode manufacturing apparatus according to an embodiment of the present disclosure is shown;

[0054] Figure 2 A portion of a composite substrate according to an embodiment of the present disclosure is shown;

[0055] Figure 3 A coating apparatus according to an embodiment of the present disclosure is shown;

[0056] Figure 4 A coating apparatus according to an embodiment of the present disclosure is shown;

[0057] Figure 5 A coating apparatus according to an embodiment of the present disclosure is shown with a segmented central functional layer;

[0058] Figure 6 shows the electrode manufacturing apparatus according to the comparative example;

[0059] Figure 7 An electrode manufacturing apparatus according to an embodiment of the present disclosure is shown;

[0060] Figure 8 An electrode manufacturing apparatus according to an embodiment of the present disclosure is shown; and

[0061] Figure 9 This is a flowchart illustrating an electrode manufacturing method according to an embodiment of the present disclosure.

[0062] Description of main reference numerals

[0063] 10: Composite substrate

[0064] 100: Electrode manufacturing equipment

[0065] 112: First functional layer

[0066] 114: Second functional layer

[0067] 120: Teleportation Department

[0068] 122: First transmission device

[0069] 124: Second transmission device

[0070] 126: Third transmission device

[0071] 130: First Slit Applicator

[0072] 134: First Mixing Section

[0073] 140: Second slit applicator

[0074] 144: Second Mixing Section

[0075] 150: Drying device

[0076] 160: Coating equipment

[0077] 162: Separation section

[0078] 164: First slurry nozzle

[0079] 164a: Third Mixing Section

[0080] 166: Second slurry nozzle

[0081] 166a: Fourth Mixing Section

[0082] X: Direction of travel

[0083] Y: Direction of gravity

[0084] A: Part of the composite substrate Detailed Implementation

[0085] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be construed as limited to their general or dictionary meanings, and should be interpreted in a manner consistent with the technical spirit of the present disclosure, based on the principle that the inventor is capable of interpreting the concepts of the terms appropriately as his / her own lexicographer.

[0086] The embodiments described in this specification and the configurations shown in the accompanying drawings are only some of the embodiments of this disclosure and do not represent all the technical ideas, aspects, and features of this disclosure. Accordingly, it should be understood that various equivalents and modifications that can replace or modify the embodiments described herein may exist at the time of filing this application.

[0087] It will be understood that when an element or layer is referred to as being "on" another element or layer, "connected to," or "linked to" another element or layer, it can be directly on, directly connected to, or linked to the other element or layer, or one or more intermediary elements or layers may be present. When an element or layer is referred to as being "directly on" another element or layer, "directly connected to," or "directly linked to" another element or layer, no intermediary element or layer is present. For example, when a first element is described as being "linked" or "connected" to a second element, the first element can be directly linked to or connected to the second element, or the first element can be indirectly linked to or connected to the second element via one or more intermediary elements.

[0088] The embodiments described herein can be explained with reference to the cross-sectional and / or plan views that serve as exemplary views of this disclosure. In the drawings, the thickness of films and regions may be exaggerated for the purpose of effectively describing the technical content. Therefore, the regions presented as examples in the drawings have general characteristics, and the shape of the example regions may be used to illustrate specific shapes of device regions. Therefore, this should not be construed as limiting the scope of this disclosure. Although terms such as first, second, and third are used to describe various components in the various embodiments herein, these components should not be limited by these terms. These terms are used only to distinguish one component from another. The embodiments described and illustrated herein include supplementary embodiments thereof. Throughout the specification, the same reference numerals refer to the same elements.

[0089] As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items. Furthermore, when describing embodiments of this disclosure, the use of “may” refers to “one or more embodiments of this disclosure.” Expressions such as “at least one of…” and “any one of…” modify the entire list of elements when following it, not individual elements in the list. When phrases such as “at least one of A, B, and C,” “at least one of A, B, or C,” “at least one selected from the group of A, B, and C,” or “at least one selected from A, B, and C” are used to refer to a list of elements A, B, and C, the phrase may refer to any one of A, B, and C and all suitable combinations or subsets of them, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term “use” may be considered synonymous with the term “utilize.” As used herein, the terms “substantially,” “approximately,” and similar terms are used as approximate terms and not as terms of degree, and are intended to describe the inherent variations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art.

[0090] It will be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or segment from another element, component, region, layer, or segment. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment.

[0091] For ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” and “above” are used herein to describe the relationship between one element or feature illustrated in the figure and another element or feature. It will be understood that spatial relative terms are intended to cover different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features will then be oriented as “above” or “above” other elements or features. Therefore, the term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein should be interpreted accordingly.

[0092] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to limit this disclosure. As used herein, the singular form “a” is intended to include the plural form as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprising” and / or “including” as used in this specification specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0093] Furthermore, any numerical range disclosed and / or described herein is intended to include all subranges with the same numerical precision contained within the described range. For example, the range “1.0 to 10.0” is intended to include all subranges between the described minimum value of 1.0 and the described maximum value of 10.0 (and inclusive of both), i.e., a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described herein is intended to include all higher numerical limits contained therein. Accordingly, the applicant reserves the right to amend this specification, including the claims, to explicitly describe any subranges contained within the scope explicitly described herein.

[0094] Referring to two compared elements, features, etc., as “identical” can mean that they are “substantially identical.” Therefore, the phrase “substantially identical” can include cases where the deviation is considered low in the art (e.g., 5% or less). Additionally, when a parameter is said to be consistent in a given region, it can mean that it is consistent in terms of average value.

[0095] Throughout this specification, unless otherwise stated, each element may be singular or plural.

[0096] Arranging any element "above (or below)" or "above (below)" another element can mean that the arbitrary element can be configured to contact the upper (or lower) surface of the element, and the other element can also be located between the element and the arbitrary element disposed on (or below) the element.

[0097] Additionally, it will be understood that when a component is referred to as a “link,” “connect,” or “attached” to another component, these components can be directly “linked,” “attached,” or “attached” to each other, or another component can be “between” these components.

[0098] Throughout this specification, unless otherwise stated, the phrase "A and / or B" means A, B, or A and B. That is, "and / or" includes any one or all combinations of the listed items. Unless otherwise stated, the phrase "C to D" means C and below D.

[0099] The terminology used in this specification is for describing embodiments of this disclosure and is not intended to limit this disclosure.

[0100] In some embodiments, the slurry may include a positive electrode active material (or a negative electrode active material), a conductive agent, a binder, additives, etc., and may be coated onto a substrate to manufacture an electrode. In some embodiments, the substrate includes a metal thin film substrate, which may include aluminum foil, copper foil, nickel foil, a polymer composite substrate coated with metal, etc., but this disclosure is not limited thereto.

[0101] In some embodiments, the positive electrode active material may include compounds capable of reversibly inserting and deintercalating lithium (e.g., lithiation intercalation compounds). In one embodiment, the positive electrode active material may include one or more composite oxides of lithium and metals including cobalt, manganese, nickel, or combinations thereof. The negative electrode active material may include materials capable of reversibly inserting / deintercalating lithium ions, lithium metal, lithium metal alloys, materials capable of doping and dedoping lithium, or transition metal oxides. A conductive agent is configured to provide conductivity to the electrode and any material that does not cause chemical changes and is conductive can be used in the battery. A binder is configured to help bond the active material and conductive material to the current collector and to help uniformly coat the slurry onto the current collector. In one embodiment, the binder may include a non-aqueous binder, an aqueous binder, a dry binder, or any combination thereof.

[0102] Figure 1 A portion of an electrode manufacturing apparatus 100 according to an embodiment of the present disclosure is shown.

[0103] The electrode manufacturing apparatus 100 may include a transport unit 120 configured to transport the composite substrate 10. The composite substrate 10 may include a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate.

[0104] The conveying unit 120 may include multiple conveying devices 122, 124, and 126. In one embodiment, the conveying unit 120 may include a roller-to-roll assembly. The first conveying device 122 may convey the composite substrate 10 toward the separation section 162 of the coating apparatus 160. A portion of the composite substrate 10 separated by the separation section 162 may be conveyed to the second conveying device 124, and another portion of the separated composite substrate 10 may be conveyed to the third conveying device 126.

[0105] In one embodiment, the electrode manufacturing apparatus 100 may include a first slit coater 130 and a second slit coater 140. The first slit coater 130 applies a first slurry to a second surface (not shown) of a first substrate included in the composite substrate 10. The second surface of the first substrate may be opposite to the first surface (not shown) of the first substrate on which a central functional layer is disposed. Because the first slit coater 130 applies the first slurry, a first mixing portion 134 can be formed on the first substrate. Before applying the first slurry, the first functional layer 112 may be disposed on the second surface of the first substrate. Similarly, the second slit coater 140 applies a second slurry to a second surface (not shown) of a second substrate included in the composite substrate 10. The second surface of the second substrate may be opposite to the first surface (not shown) of the second substrate on which a central functional layer is disposed. Because the second slit coater 140 applies the second slurry, a second mixing portion 144 can be formed on the second substrate. Before applying the second slurry, the second functional layer 114 may be disposed on the second surface of the second substrate. The functional layers 112 and 114, which are placed first, can be bonded to the mixing portions 134 and 144, respectively, and to the substrate. (See reference) Figure 2 The composite substrate 10 is described in detail before the application of the first slurry and / or the second slurry.

[0106] In one embodiment, the composite substrate 10, on which the first mixing section 134 and the second mixing section 144 are formed, can be conveyed to the first drying apparatus 150. The first drying apparatus 150 can dry solvents, etc., contained in the first mixing section 134 and / or the second mixing section 144. Thereafter, the dried composite substrate 10 can be conveyed toward the separation section 162 of the coating apparatus 160.

[0107] Electrode manufacturing apparatus 100 may include coating apparatus 160, which includes a separation section 162, a first slurry nozzle 164, and a second slurry nozzle 166. The separation section 162 can separate a first substrate and a second substrate of the conveyed composite substrate 10. In one embodiment, the separation section 162 can separate the first substrate and the second substrate by dividing a central functional layer included in the composite substrate 10. The first slurry nozzle 164 can apply a third slurry to a first surface of the separated first substrate. The second slurry nozzle 166 can apply a fourth slurry to the first surface of the separated second substrate.

[0108] In one embodiment, the separating portion 162 can separate the first substrate and the second substrate, and place a first partial functional layer corresponding to a portion of the central functional layer on a first surface of the first substrate. In some embodiments, the separating portion 162 can place a second partial functional layer corresponding to another portion of the central functional layer on the first surface of the second substrate. In one embodiment, the separating portion 162 can divide the central functional layer such that a portion of the divided central functional layer can be placed as a first partial functional layer on the first surface of the first substrate, and another portion of the divided central functional layer can be placed as a second partial functional layer on the first surface of the second substrate.

[0109] Subsequently, the first slurry nozzle 164 can apply a third slurry to a surface (e.g., an exposed surface) of the first partial functional layer. The second slurry nozzle 166 can apply a fourth slurry to a surface (e.g., an exposed surface) of the second partial functional layer. By applying the third slurry, a third mixing portion 164a can be formed on the first partial functional layer, and by applying the fourth slurry, a fourth mixing portion 166a can be formed on the second partial functional layer. The first partial functional layer can bond the first substrate and the third mixing portion 164a, and the second partial functional layer can bond the second substrate and the fourth mixing portion 166a.

[0110] In one embodiment, a first electrode plate, including a first mixing section 134, a third mixing section 164a, and a first substrate, can be conveyed to a second drying device (not shown) via a second conveying device 124. In another embodiment, a second electrode plate, including a second mixing section 144, a third mixing section 166a, and a second substrate, can be conveyed to a second drying device or a third drying device (not shown) via a third conveying device 126. The first and second electrode plates dried by the second and / or third drying devices can be used as positive or negative electrodes. The positive or negative electrode can be included in an electrode assembly, and the electrode assembly can be housed in a casing and manufactured as a secondary battery.

[0111] In one embodiment, the direction of entry into the coating apparatus 160 may correspond to the transport direction X of the composite substrate 10. The direction of entry into the coating apparatus 160 may be perpendicular to the gravitational direction Y. In this way, the first substrate of the composite substrate 10 may be located above the second substrate.

[0112] The materials of the first to fourth slurries can be substantially the same as each other, and the materials of the first and second substrates can be substantially the same as each other. However, this disclosure is not limited thereto, and the materials of the first to fourth slurries can be different from each other, and the materials of the first and second substrates can be different from each other. In one embodiment, the first and third slurries can be slurries comprising a positive electrode active material, and the first substrate can be a substrate for a positive electrode. In one embodiment, the second and fourth slurries can be slurries comprising a negative electrode active material, and the second substrate can be a substrate for a negative electrode.

[0113] Embodiments of this disclosure provide a coating apparatus using a composite substrate comprising a first substrate, a second substrate, and a central functional layer. Multiple devices may be required to coat each of the first and second substrates. In one embodiment, the coating apparatus is a single device capable of separating the first and second substrates and performing coating thereon in a cooperative manner. Advantageously, this can increase the space utilization of the process and thus improve productivity.

[0114] In some embodiments, the central functional layer can be segmented after the mixing portion is disposed on two surfaces of the composite substrate 10 (e.g., the second surface of the first substrate and the second surface of the second substrate). The disposed mixing portion can enhance the rigidity of the first substrate and the second substrate, which are separated from each other. Accordingly, the first substrate and the second substrate are separated from each other, and thus damage to the first substrate and the second substrate can be prevented.

[0115] Figure 2 A portion A of the composite substrate according to an embodiment of the present disclosure is shown.

[0116] Figure 2 The composite substrate 10 is shown before the mixing section is placed. The composite substrate 10 may include a first substrate 212 and a second substrate 214. Each of the first substrate 212 and the second substrate 214 may include aluminum foil, copper foil, nickel foil, a polymer composite substrate coated with metal, etc.

[0117] The composite substrate 10 may include a central functional layer 220 between a first surface (corresponding to the lower surface) of the first substrate 212 and a first surface (corresponding to the upper surface) of the second substrate 214. The first functional layer 112 may be disposed on the second surface (corresponding to the upper surface) of the first substrate 212. The second functional layer 114 may be disposed on the second surface (corresponding to the lower surface) of the second substrate 214.

[0118] In one embodiment, the first functional layer 112, the second functional layer 114, and the central functional layer 220 may include a primer layer mixed with a polymer having adhesive properties. In one embodiment, the primer layer may include a mixture of a conductive material and a polymer having adhesive properties. In one embodiment, the first functional layer 112, the second functional layer 114, and the central functional layer 220 may include polyethylene terephthalate (PET), polypropylene (PP), polyamide (PA), polyvinyl alcohol (PVA), polyethylene (PE), polyvinylidene fluoride (PVDF), styrene-butadiene rubber (SBR), and sodium... + Or Li + -Carboxymethyl cellulose (CMC), polyacrylate (ACM), etc. The central functional layer 220 can be adhered to the first substrate 212 and the second substrate 214 via a polymer with adhesive properties.

[0119] Compared to using only a single substrate, each of the substrates 212 and 214 included in the composite substrate 10 can be relatively thin. Because the electrode manufacturing equipment involves using relatively thin substrates, electrodes with high energy density can be manufactured. Furthermore, because the composite substrate is used in the early stages of electrode manufacturing, the initial composite substrate is robust in terms of mechanical stability.

[0120] Figure 3 A coating apparatus 300 according to an embodiment of the present disclosure is shown.

[0121] The coating apparatus 300 may include a separation portion 310 capable of separating a first substrate and a second substrate included in a composite substrate. In some embodiments, the coating apparatus 300 may include a first slurry nozzle 322 and a second slurry nozzle 332, the first slurry nozzle 322 being located on one side of the separation portion 310 to apply a third slurry to a first surface of the first substrate, and the second slurry nozzle 332 being located on the other side of the separation portion 310 to apply a fourth slurry to the first surface of the second substrate.

[0122] In one embodiment, the end of the separating portion 310 may contact the central functional layer to separate the central functional layer. The end of the separating portion 310 may include a dividing device for dividing the central functional layer, and the separation of the central functional layer may refer to the division using the dividing device. The separating portion 310 may include a buffer portion 312 located at the end of the separating portion. The buffer portion 312 may be relatively thicker than the periphery of the end of the separating portion 310. The buffer portion 312 can prevent damage to the end of the separating portion 310 and can buffer the separation of the first substrate and the second substrate.

[0123] In one embodiment, the first slurry nozzle 322 can supply a third slurry through the first slurry distribution channel 324. Additionally, the second slurry nozzle 332 can supply a fourth slurry through the second slurry distribution channel 334. That is, the slurry distribution channel can be connected to each of the first slurry nozzle 322 and the second slurry nozzle 332.

[0124] Figure 4 A coating apparatus 400 according to an embodiment of the present disclosure is shown.

[0125] refer to Figure 4 The coating apparatus 400 may include a separation portion 410 capable of separating a first substrate and a second substrate included in a composite substrate. In some embodiments, the coating apparatus 400 may include a first slurry nozzle 422 and a second slurry nozzle 432, the first slurry nozzle 422 being located on one side of the separation portion 410 to apply a third slurry to a first surface of the first substrate, and the second slurry nozzle 432 being located on the other side of the separation portion 410 to apply a fourth slurry to the first surface of the second substrate.

[0126] In one embodiment, the end of the separating portion 410 may contact the central functional layer to separate the central functional layer. The end of the separating portion 410 may include a dividing device for dividing the central functional layer, and the separation of the central functional layer may refer to the division using the dividing device. The separating portion 410 may include a buffer portion 412 located at the end of the separating portion. The buffer portion 412 may be relatively thicker than the periphery of the end of the separating portion 410. The buffer portion 412 can prevent damage to the end of the separating portion 410 and can buffer the separation of the first substrate and the second substrate. In one embodiment, the first slurry nozzle 422 can supply a third slurry through the first slurry dispensing channel 424. In addition, the second slurry nozzle 432 can supply a fourth slurry through the second slurry dispensing channel 434. That is, the slurry dispensing channel can be connected to each of the first slurry nozzle 422 and the second slurry nozzle 432.

[0127] In one embodiment, the first slurry dispensing channel 424 and the second slurry dispensing channel 434 may be connected to a single slurry channel 440. The slurry channel 440 may supply slurry to the first slurry dispensing channel 424 and the second slurry dispensing channel 434.

[0128] In one embodiment, the slurry channel 440 may be connected to a first slurry nozzle 422 and a second slurry nozzle 432. The slurry channel 440 may supply a third slurry (combined with a fourth slurry) to both the first slurry nozzle 422 and the second slurry nozzle 432. In one embodiment, the slurry channel 440 may supply the third slurry to both the first slurry nozzle 422 and the second slurry nozzle 432 when no fourth slurry is available. In one embodiment, the slurry application rate of the first slurry nozzle 422 and the second slurry nozzle 432 may be different from each other. Thus, the slurry application rate can be controlled by adjusting the specifications of the first slurry nozzle 422 and the second slurry nozzle 432 (e.g., the size of the slurry outlet).

[0129] Figure 5 A coating apparatus 300 according to an embodiment of the present disclosure is shown with a segmented central functional layer 220. Main Reference Figure 5 Describe the coating equipment (see) Figure 3 300) split composite substrate (see Figure 2 (10).

[0130] In one embodiment, the composite substrate 10 can be conveyed toward the separation section 310 of the coating apparatus 300. The central functional layer 220 of the composite substrate 10 can be separated (e.g., divided) by the separation section 310. Accordingly, the separation section 310 can separate the first substrate 212 and the second substrate 214, and can place a first partial functional layer 532, which is part of the central functional layer 214, on the first surface (corresponding to the lower surface) of the first substrate 212. In one embodiment, the separation section 310 can place a second partial functional layer 534, which is another part of the central functional layer 214, on the first surface (corresponding to the upper surface) of the second substrate 214. A buffer section 312 located at the end of the separation section 310 can mitigate the impact that may occur when the central functional layer 220 is divided.

[0131] In one embodiment, the separation portion 310 can form a first partial functional layer 532 and a second partial functional layer 534 having the same (or substantially the same) thickness by separating (e.g., dividing) the central functional layer 214. In one embodiment, by separating the center relative to the thickness direction of the central functional layer 214, the first partial functional layer 532 and the second partial functional layer 534 can have substantially the same thickness. The thickness of the first partial functional layer 532 and the thickness of the second partial functional layer 534 can be different from each other, but this disclosure is not limited thereto.

[0132] In one embodiment, the electrode manufacturing apparatus may include a control unit 510. The control unit 510 may be present as part of a processor included in the electrode manufacturing apparatus, but this disclosure is not limited thereto. The control unit 510 may move the coating apparatus 300 upwards or downwards relative to the gravitational direction Y. By moving the coating apparatus 300 upwards or downwards, the separation portion 310 included in the coating apparatus 300 may segment the target points of the central functional layer 214.

[0133] In one embodiment, the first slurry nozzle 322 may be positioned above the second slurry nozzle 332 relative to the direction of gravity Y. The first slurry nozzle 322 may apply a third slurry in the direction Y' opposite to the direction of gravity, and the second slurry nozzle 332 may apply a fourth slurry in the direction of gravity Y.

[0134] In one embodiment, the application speed of the third slurry through the first slurry nozzle 322 may differ from the application speed of the fourth slurry through the second slurry nozzle 332. In another embodiment, the first slurry nozzle 322 may apply the third slurry in a direction Y' opposite to the direction of gravity, and the second slurry nozzle 332 may apply the fourth slurry in the direction Y of gravity. In this case, the application speed of the third slurry through the first slurry nozzle 322 may be greater than the application speed of the fourth slurry through the second slurry nozzle 332. Accordingly, the slurry can be applied at a controlled speed in response to the movement of the slurry along gravity.

[0135] In one embodiment, the first slurry distribution channel 324 allows the supply of a third slurry via a first slurry pump. The second slurry distribution channel 334 allows the supply of a fourth slurry via a second slurry pump. The slurry supply rates of the first and second slurry pumps can be controlled by the control unit 510.

[0136] In one embodiment, by applying a third slurry, the third mixing portion 164a can be disposed on the first partial functional layer 532, and by applying a fourth slurry, the fourth mixing portion 166a can be disposed on the second partial functional layer 534. At this time, the first partial functional layer 532 can bond the first substrate 212 and the third mixing portion 164a, and the second partial functional layer 534 can bond the second substrate 214 and the fourth mixing portion 166a.

[0137] In one embodiment, the electrode manufacturing apparatus may include a first blower 522 for supplying air to a first surface of a first substrate on which a third mixing portion 164a is disposed. In another embodiment, the electrode manufacturing apparatus may include a second blower 524 for supplying air to a first surface of a second substrate on which a fourth mixing portion 166a is disposed. The third mixing portion 164a and the fourth mixing portion 166a may be in the form of an irregularly distributed slurry, and the blower may disperse the slurry by supplying air to each mixing portion. In this way, a uniformly distributed mixing portion of the slurry can be formed.

[0138] Figure 6 illustrates an electrode manufacturing apparatus 600 according to a comparative example. The electrode manufacturing apparatus 600 described with reference to Figure 6 may not include a coating device (e.g., Figure 1 Coating equipment 160 Figure 3 Coating equipment 300 or Figure 4 The coating equipment 400). In Figure 6, the electrode manufacturing process of electrode manufacturing equipment 600 excluding the coating equipment is described.

[0139] In a comparative example, in the electrode manufacturing apparatus 600, the substrate 60 can be conveyed by a conveying device. The substrate 60 may not include a composite substrate. A first slurry is applied to the first surface of the substrate 60 using a first slit coater 610. The substrate 60, having been coated with the first slurry, is then dried using a first drying apparatus 630. The second surface of the substrate 60 (opposite to the first surface) is coated with a second slurry using a second slit coater 620. The substrate 60, having been coated with the second slurry, is then dried using a second drying apparatus 640. The substrate 60, coated with both the first and second slurries and dried using the first and second drying apparatuses 630 and 640, can be used as a positive or negative electrode.

[0140] Figure 7 An electrode manufacturing apparatus 700 according to an embodiment of the present disclosure is shown. The electrode manufacturing apparatus 700 may include [equipment / components]. Figure 1 Coating equipment 160 Figure 3 Coating equipment 300 or Figure 4 The coating equipment 400 is basically the same as the coating equipment 730.

[0141] In one embodiment, in the electrode manufacturing apparatus 700, the composite substrate 70 can be conveyed by a conveying device. A first slurry can be applied to the first surface of the composite substrate 70 using a first slit coater 710, and a second slurry can be applied to the second surface of the composite substrate 70 using a second slit coater 720. Subsequently, the composite substrate 70, having been coated with both the first and second slurries, can be dried using a first drying apparatus 740.

[0142] The composite substrate 70, dried by the first drying apparatus 740, can be separated into a first substrate 72 and a second substrate 74 by the coating apparatus 730. In some embodiments, the coating apparatus 730 can apply a third slurry to a first surface of the first substrate 72 and a fourth slurry to a first surface of the second substrate 74. Subsequently, the first substrate 72 coated with the third slurry can be dried by the second drying apparatus 750, and the second substrate 74 coated with the fourth slurry can be dried by the third drying apparatus 760. The first substrate 72, coated with the first and third slurries and dried by the first and second drying apparatuses 740 and 750, can be used as a positive or negative electrode. Similarly, the second substrate 74, coated with the second and fourth slurries and dried by the first and third drying apparatuses 740 and 760, can be used as a positive or negative electrode.

[0143] Refer to Figure 6 and Figure 7 The electrode manufacturing equipment 600 in Figure 6 may need to have a higher efficiency than... Figure 7 The electrode manufacturing equipment 700 requires a relatively long substrate. Figure 7 The electrode manufacturing equipment 700 may require a composite substrate 70 with a length equal to or less than approximately half the required length in Figure 6. When the electrode manufacturing speed is the same... Figure 7 The electrode manufacturing equipment 700 is capable of manufacturing electrodes having a length at least twice that of the electrodes manufactured by the electrode manufacturing equipment 600 of FIG. 6.

[0144] Furthermore, to manufacture electrodes of the same length within the same timeframe, the electrode manufacturing apparatus 600 of Figure 6 might require at least four slit coaters and four drying units. In contrast, Figure 7 The electrode manufacturing apparatus 700 may require only two slot coaters, one coating device 730, and three drying units. Advantageously, the electrode manufacturing apparatus 700 according to embodiments of the present disclosure can increase the space utilization of the electrode manufacturing process.

[0145] Figure 8 An electrode manufacturing apparatus 800 according to an embodiment of the present disclosure is shown. The electrode manufacturing apparatus 800 may include, with Figure 1 Coating equipment 160 Figure 3 Coating equipment 300 or Figure 4 The coating equipment 400 is basically the same as the coating equipment 830.

[0146] In one embodiment, in the electrode manufacturing apparatus 800, the composite substrate 80 can be conveyed by a conveying device. A first surface of the composite substrate 80 can be coated with a first slit coater 810, and a second surface of the composite substrate 80 can be coated with a second slit coater 820. Subsequently, the composite substrate 80, coated with both the first and second slits, can be dried using a first drying apparatus 840.

[0147] The composite substrate 80 dried by the first drying apparatus 840 can be separated into a first substrate 82 and a second substrate 84 by the coating apparatus 830. In some embodiments, the coating apparatus 830 can apply a third slurry to a first surface of the first substrate 82 and a fourth slurry to a first surface of the second substrate 84. Thereafter, the first substrate 82 coated with the third slurry and the second substrate 84 coated with the fourth slurry can be dried together using a second drying apparatus 850. The first substrate 82, coated with the first and third slurries and dried by the first and second drying apparatuses 840 and 850, can be used as a positive or negative electrode. Similarly, the second substrate 84, coated with the second and fourth slurries and dried by the first and second drying apparatuses 840 and 850, can be used as a positive or negative electrode.

[0148] In one embodiment, the duration for which the first substrate 82 and the second substrate 84 enter the second drying apparatus 850 can be the same or substantially the same. Accordingly, it is possible to ensure the uniform quality of the electrodes using the first substrate 82 coated with the first slurry and the third slurry and the second substrate 84 coated with the second slurry and the fourth slurry.

[0149] Refer to Figure 6 and Figure 8 The electrode manufacturing equipment 600 in Figure 6 may need to have a higher efficiency than... Figure 8 The electrode manufacturing equipment 800 requires a relatively long substrate. Figure 8 The electrode manufacturing equipment 800 may require a composite substrate 80 with a length equal to or less than approximately half the required length in Figure 6. When the electrode manufacturing speed is the same, Figure 8 The electrode manufacturing equipment 800 is capable of manufacturing electrodes having a length at least twice that of the electrodes manufactured by the electrode manufacturing equipment 600 of Figure 6.

[0150] Furthermore, to manufacture electrodes of the same length within the same timeframe, the electrode manufacturing apparatus 600 in Figure 6 might require at least four slit coaters and four drying units. In contrast, Figure 8 The electrode manufacturing apparatus 800 may require only two slot coaters, one coating device 730, and two drying units. Advantageously, the electrode manufacturing apparatus 800 according to embodiments of the present disclosure can increase the space utilization of the electrode manufacturing process.

[0151] Figure 9 This is a flowchart illustrating an electrode manufacturing method 900 according to an embodiment of the present disclosure. The electrode manufacturing method 900 can be performed using an electrode manufacturing apparatus according to an embodiment of the present disclosure. In one embodiment, the electrode manufacturing apparatus may include a reference... Figure 1 The electrode manufacturing apparatus 100 is described. For example, the electrode manufacturing apparatus may include reference... Figure 7 The electrode manufacturing equipment 700 described and referenced Figure 8 At least one of the electrode manufacturing apparatus 800 described.

[0152] The electrode manufacturing method may begin by conveying a composite substrate comprising a first substrate, a second substrate, and a central functional layer via a transfer unit included in an electrode manufacturing apparatus (S910). The central functional layer may be provided between a first surface of the first substrate and a first surface of the second substrate.

[0153] In one embodiment, a separation unit included in the coating apparatus can separate a first substrate and a second substrate of a conveyed composite substrate (S920). The separation unit can separate the first substrate and the second substrate. The separation unit can place a first partial functional layer, which is part of a central functional layer, on a first surface of the first substrate, and place a second partial functional layer, which is another part of the central functional layer, on the first surface of the second substrate. A first slurry nozzle can apply a third slurry to one surface of the first partial functional layer. A second slurry nozzle can apply a fourth slurry to one surface of the second partial functional layer. In one embodiment, the separation unit can divide the central functional layer to form a first partial functional layer and a second partial functional layer having substantially the same thickness.

[0154] In one embodiment, the electrode manufacturing apparatus may further include a buffer portion located at the end of the separation portion that contacts the central functional layer.

[0155] In one embodiment, the first slurry nozzle may be positioned above the second slurry nozzle relative to the direction of gravity. The first slurry nozzle may apply a third slurry in a direction opposite to the direction of gravity, and the second slurry nozzle may apply a fourth slurry in the direction of gravity. In some embodiments, the application speed of the third slurry through the first slurry nozzle may be different from the application speed of the fourth slurry through the second slurry nozzle.

[0156] In one embodiment, the coating apparatus may further include a slurry channel for supplying slurry together to a first slurry nozzle and a second slurry nozzle. In one embodiment, the coating apparatus may include a first slurry dispensing channel for supplying a third slurry to the first slurry nozzle and a second slurry dispensing channel for supplying a fourth slurry to the second slurry nozzle.

[0157] In one embodiment, the electrode manufacturing apparatus may further include a control unit for moving the coating apparatus upward or downward relative to the direction of gravity.

[0158] In one embodiment, a first slurry nozzle located on one side of the separation section can apply a third slurry to a first surface of the first substrate (S930).

[0159] In one embodiment, a second slurry nozzle located on the other side of the separation section can apply a fourth slurry to the first surface of the second substrate (S940).

[0160] In one embodiment, a first blower can supply air to a first surface of a first substrate coated with a third paste. In some embodiments, a second blower can supply air to a first surface of a second substrate coated with a fourth paste.

[0161] In one embodiment, a first slit coater can apply a first slurry to a second surface of a first substrate. In another embodiment, a second slit coater can apply a second slurry to a second surface of a second substrate. The application of the first slurry can be performed before the first and second substrates are separated. The application of the second slurry can be performed before the first and second substrates are separated.

[0162] In one embodiment, before the first substrate and the second substrate are separated by a separation part, the first drying device can dry a composite substrate comprising a first substrate coated with a first slurry and a second substrate coated with a second slurry.

[0163] In one embodiment, the second drying apparatus can dry the first substrate coated with the third slurry and the second substrate coated with the fourth slurry together.

[0164] In one embodiment, the second drying apparatus can dry the first substrate coated with a third paste. The third drying apparatus can dry the second substrate coated with a fourth paste.

[0165] Figure 9 The flowcharts and descriptions above are merely examples of this disclosure, and the scope of this disclosure is not limited to... Figure 9 The flowchart and the above description are as follows. In one embodiment, one or more steps in the flowchart and the above description may be added / modified / deleted, the order of one or more steps may be changed, and one or more steps may be executed together.

[0166] Although the present disclosure has been described above with reference to embodiments thereof, the present disclosure is not limited thereto. Those skilled in the art will be able to make various modifications and variations thereto within the spirit and scope of the present disclosure.

Claims

1. A coating apparatus, comprising: A separation section is configured to separate a composite substrate comprising a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate. A first slurry nozzle is located on one side of the separation section and is configured to apply a third slurry to the first surface of the first substrate; as well as The second slurry nozzle is located on the other side of the separation section and is configured to apply the fourth slurry to the first surface of the second substrate.

2. The coating apparatus of claim 1, wherein the separating section is configured to separate the central functional layer to form a first partial functional layer on the first surface of the first substrate and a second partial functional layer on the first surface of the second substrate, wherein the first slurry nozzle is configured to apply the third slurry to the exposed surface of the first partial functional layer, and wherein the second slurry nozzle is configured to apply the fourth slurry to the exposed surface of the second partial functional layer.

3. The coating apparatus according to claim 2, wherein the first functional layer and the second functional layer have the same thickness.

4. The coating apparatus according to claim 1, further comprising a buffer portion located at the end of the separating portion and configured to contact the central functional layer.

5. The coating apparatus of claim 1, wherein the first slurry nozzle is located above the second slurry nozzle relative to the direction of gravity, the first slurry nozzle is configured to apply the third slurry in a direction opposite to the direction of gravity, and the second slurry nozzle is configured to apply the fourth slurry in the direction of gravity.

6. The coating apparatus according to claim 1, wherein the coating speed of the third slurry via the first slurry nozzle is different from the coating speed of the fourth slurry via the second slurry nozzle.

7. The coating apparatus according to any one of claims 1 to 6, further comprising a slurry channel configured to supply the third slurry to both the first slurry nozzle and the second slurry nozzle when the fourth slurry is unavailable.

8. The coating apparatus according to any one of claims 1 to 6, further comprising: A first slurry distribution channel is configured to supply the third slurry to the first slurry nozzle; as well as The second slurry distribution channel is configured to supply the fourth slurry to the second slurry nozzle.

9. An electrode manufacturing apparatus, comprising: A conveying unit is configured to convey a composite substrate comprising a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate. as well as Coating equipment, including: A separation section is configured to separate the composite substrate; A first slurry nozzle, located on one side of the separation section, is configured to apply a third slurry to the first surface of the first substrate; and The second slurry nozzle is located on the other side of the separation section and is configured to apply the fourth slurry to the first surface of the second substrate.

10. The electrode manufacturing apparatus of claim 9, further comprising a control unit configured to move the coating apparatus upward or downward relative to the direction of gravity.

11. The electrode manufacturing apparatus according to claim 9, further comprising: A first slit coater is configured to apply a first slurry onto a second surface of the first substrate; as well as A second slit coater is configured to apply a second slurry to a second surface of the second substrate.

12. The electrode manufacturing apparatus of claim 11, further comprising a first drying device located in front of the separation section and configured to dry the composite substrate comprising the first substrate coated with the first slurry and the second substrate coated with the second slurry.

13. The electrode manufacturing apparatus according to any one of claims 9 to 12, further comprising a second drying device configured to dry the first substrate coated with the third slurry, and configured to dry the second substrate coated with the fourth slurry.

14. The electrode manufacturing apparatus according to any one of claims 9 to 12, further comprising: A second drying apparatus is configured to dry the first substrate coated with the third slurry. as well as A third drying apparatus is configured to dry the second substrate coated with the fourth slurry.

15. The electrode manufacturing apparatus according to any one of claims 9 to 12, further comprising: A first blower is configured to supply air to the first surface of the first substrate coated with the third paste; as well as A second blower is configured to supply air to the first surface of the second substrate coated with the fourth paste.

16. A method for manufacturing an electrode, comprising: The transmission includes a composite substrate comprising a first substrate, a second substrate, and a central functional layer between a first surface of the first substrate and a first surface of the second substrate; The composite substrate is separated by a coating device; The third slurry is applied to the first surface of the first substrate; and The fourth slurry is applied to the first surface of the second substrate.

17. The method of claim 16, further comprising: The first slurry is applied to the second surface of the first substrate; as well as The second slurry is applied to the second surface of the second substrate.

18. The method of claim 17, further comprising: Prior to the separation, the composite substrate is dried, comprising the first substrate coated with the first slurry and the second substrate coated with the second slurry.

19. The electrode manufacturing method according to any one of claims 16 to 18, further comprising: Both the first substrate coated with the third slurry and the second substrate coated with the fourth slurry are dried together.

20. The electrode manufacturing method according to any one of claims 16 to 18, further comprising: The first substrate coated with the third slurry and the second substrate coated with the fourth slurry are dried separately.

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