Electrode manufacturing device and electrode manufacturing method using the same

Abstract

The present invention relates to an electrode manufacturing apparatus including an unwinder that unwinds an electrode current collector that is not coated with an electrode active material, a rewinder that winds up an electrode current collector that is coated with an electrode active material, a stamping member that is located between the unwinder and the rewinder and applies a coating prevention material to the electrode current collector to prevent the electrode active material from being coated, and an electrode active material supplying member that coats the electrode current collector with the electrode active material, and a method for manufacturing an electrode using the same, which can prevent a slide portion from being formed on the outer periphery of a ground portion of an electrode.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0136373, filed October 13, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to an electrode manufacturing apparatus and an electrode manufacturing method using the same, and more particularly to an electrode manufacturing apparatus and an electrode manufacturing method using the same that can prevent sliding from occurring in a landed portion, which is an electrode active material layer coated on an electrode current collector. [Background technology]

[0003] Rechargeable lithium secondary batteries are widely used as energy sources for wireless mobile devices or wearable devices, as well as for electric vehicles and hybrid electric vehicles, which are presented as alternatives to existing gasoline and diesel vehicles that cause air pollution.

[0004] The electrode of the lithium secondary battery includes a coated portion where an electrode active material is coated on one or both sides of the electrode plate, and an uncoated portion where the electrode active material is not coated, and an electrode tab may be formed on the uncoated portion.

[0005] The manufacturing process of the electrode includes the steps of coating an electrode active material on a portion of an electrode sheet wound into a roll, excluding a portion where an electrode tab is to be formed, drying and rolling the electrode active material, slitting the electrode sheet, and notching the slit electrode sheet into unit electrodes.

[0006] Before the coated area of ​​the electrode active material dries, it may flow down to the outer periphery. This area is called a sliding area. Because the thickness of the electrode is reduced at the sliding area, when the electrode and separator are laminated, the electrode and separator may not adhere to each other and may lift up.

[0007] This phenomenon can slow down the speed of lithium ions passing through the separator, causing negative electrode overpotential, and can deepen the imbalance in the lithium salt concentration in the electrolyte, accelerating electrolyte decomposition and causing the electrolyte to be quickly depleted, which can result in lithium precipitation.

[0008] To solve this problem, a method was attempted in which a CPP film was attached to the sliding portion of the electrode to compensate for the thickness reduction, but this did not completely solve the above problems.

[0009] Alternatively, an etching process has been developed in which the sliding portion is removed using a laser during the process of coating the electrode active material. However, as the thickness of the electrode active material becomes thinner, the process becomes more difficult and fine pinholes may occur, which may affect the quality of the electrode.

[0010] Patent Document 1 discloses a method of forming an electrode mixture layer by forming a dam line coating layer in a shape that surrounds an area to be coated with electrode slurry, and coating the electrode slurry within the area surrounded by the dam line coating layer.

[0011] In Patent Document 1, a dam line coating layer is formed on the edge of the electrode slurry to prevent the electrode slurry from flowing down, thereby preventing the occurrence of sliding portions. However, since the process of forming the dam line coating layer and the process of coating the electrode slurry must be performed separately, the process time may increase, and the process of filling the dam line coating layer with the electrode slurry must be performed carefully.

[0012] Patent Document 2 relates to an electrode having a binder layer and a manufacturing method thereof, in which an electrode active material layer is formed on a current collector having an electrode tab formed on one end thereof, and a binder layer is formed between the current collector and the electrode active material layer, and the binder layer is formed on both ends of the electrode active material layer.

[0013] In Patent Document 2, prior to applying the electrode slurry, a binder composition is applied to both ends of the position where the electrode slurry will be applied, thereby preventing the electrode slurry from being detached from the current collector during the notching process of the current collector.

[0014] That is, Patent Document 2 cannot provide a technique for preventing the formation of a sliding portion in the electrode active material layer.

[0015] Therefore, there is a need for a technology that can prevent problems such as electrolyte depletion and lithium deposition by preventing the formation of a sliding portion at the outer periphery of a land portion coated with an electrode active material and by bonding the electrode and separator to each other at the entire interface, and that can be performed in a continuous process so as not to delay the electrode manufacturing process. [Prior art documents] [Patent documents]

[0016] [Patent Document 1] Korean Patent Publication No. 10-2022-0124918

[0017] [Patent Document 2] Korean Patent Publication No. 10-2022-0000064 Summary of the Invention [Problem to be solved by the invention]

[0018] The present invention has been made to solve the above-mentioned problems, and aims to provide an electrode manufacturing apparatus in which a sliding portion is not formed on the outer periphery of a ground portion coated with an electrode active material, and an electrode manufacturing method using the same. [Means for solving the problem]

[0019] To achieve this object, the electrode manufacturing apparatus according to the present invention includes an unwinder (200) that unwinds an electrode current collector (100) that is not coated with an electrode active material, a rewinder (300) that winds up the electrode current collector (100) that is coated with an electrode active material, a stamping member (400) that is located between the unwinder (200) and the rewinder (300) and that applies a coating prevention material (413, 423) to the electrode current collector (100) to prevent the electrode active material from being coated, and an electrode active material supplying member (500) that coats the electrode current collector (100) with the electrode active material.

[0020] In the electrode manufacturing apparatus, the coating prevention material may include a hydrophobic material.

[0021] The coating prevention material may also include a volatile material.

[0022] Also, the electrode assembly may further include a drying member (600) for drying the electrode active material and volatilizing the coating prevention material.

[0023] In the electrode manufacturing apparatus, the stamping members (400) may be a pair positioned on the upper and lower surfaces of the electrode current collector (100) facing each other.

[0024] In the electrode manufacturing apparatus, the stamping member (400) may include a stamping body (411, 421) including a cylindrical center portion having a rotation axis parallel to the width direction of the electrode current collector (100) and a plurality of protrusions protruding outward from the center portion at regular intervals, and coating members (412, 422) provided at the ends of the protrusions of the stamping bodies (411, 421).

[0025] In addition, the stamping bodies (411, 421) rotate around the rotation axis to supply the coating prevention material (413, 423) to the application members (412, 422), and the application members (412, 422) can apply the coating prevention material (413, 423) onto the electrode current collector (100) at regular intervals while discontinuously contacting the electrode current collector (100).

[0026] In addition, the stamping bodies (411, 421) can rotate in the direction in which the electrode current collector (100) is transported.

[0027] The electrode active material supplying member (500) may be a pair of members positioned on the upper and lower surfaces of the electrode current collector (100) facing each other.

[0028] The electrode active material may include a hydrophilic material.

[0029] The present invention also provides a method for manufacturing an electrode using the electrode manufacturing apparatus, which includes a first step of supplying an electrode current collector, a second step of applying a coating prevention material to the electrode current collector, a third step of applying an electrode active material to the electrode current collector to form a coating layer, and a fourth step of drying the electrode current collector coated with the coating prevention material and the electrode active material.

[0030] In the electrode manufacturing method, the coating prevention material may be applied at regular intervals in the second step.

[0031] In the method for manufacturing an electrode, the electrode active material may not be coated on the area where the coating prevention material is applied.

[0032] The method for manufacturing an electrode may further include the step of connecting an electrode lead to the electrode current collector after removing the coating prevention material from the region where the coating prevention material is applied.

[0033] The method for manufacturing an electrode may further include, after the fourth step, slitting the electrode current collector coated with the coating prevention material and the electrode active material.

[0034] Furthermore, the present invention can also be provided in the form of various combinations of means for solving the above problems. [Effects of the Invention]

[0035] As described above, the electrode manufacturing apparatus and the electrode manufacturing method using the same of the present invention include a stamping member that applies a hydrophobic material, which is a coating prevention material, to the uncoated portion of the electrode current collector, thereby preventing the electrode active material from flowing down and thereby preventing the formation of a sliding portion on the outer periphery of the coated portion.

[0036] In addition, according to the electrode manufacturing apparatus and the electrode manufacturing method using the same of the present invention, since the coating prevention material contains a volatile substance, the volatile substance can be removed during the drying process of the electrode active material, thereby eliminating the need for a separate process for removing the coating prevention material.

[0037] In addition, the electrode manufactured by the electrode manufacturing apparatus and the electrode manufacturing method using the same does not have a sliding portion in the ground portion, so the entire surface of the electrode facing the separator can be adhered to the separator, which can prevent electrolyte depletion and lithium deposition. [Brief explanation of the drawings]

[0038] [Figure 1]1 is a cross-sectional view of an electrode manufacturing apparatus according to a first embodiment of the present invention.

[0039] [Figure 2] FIG. 2 is a partial perspective view of the electrode manufacturing apparatus shown in FIG.

[0040] [Figure 3] FIG. 4 is a cross-sectional view of an electrode manufacturing apparatus according to a second embodiment of the present invention.

[0041] [Figure 4] FIG. 10 is a cross-sectional view of an electrode manufacturing apparatus according to a third embodiment of the present invention.

[0042] [Figure 5] 1 is a flowchart showing the steps of an electrode manufacturing method according to the present invention.

[0043] [Figure 6] 1 is an exemplary view illustrating a process of manufacturing a unit electrode from an electrode current collector having a coated portion and an uncoated portion formed thereon using an electrode manufacturing apparatus according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0044] Hereinafter, with reference to the accompanying drawings, a detailed description will be given of an embodiment of the present invention that will enable a person skilled in the art to easily carry out the present invention. In describing the operation principle of the embodiment of the present invention in detail, detailed description of related well-known functions or configurations will be omitted if it is determined that such detailed description may unnecessarily obscure the gist of the present invention.

[0045] Throughout the drawings, the same reference numerals are used for parts having similar functions and actions. Throughout the specification, when a part is said to be connected to another part, this includes not only a direct connection but also an indirect connection via another element therebetween. Furthermore, unless otherwise specified, "including a certain element" does not mean that other elements are excluded, but that other elements may also be included.

[0046] Descriptions that limit or specify additional elements are applicable to all inventions and are not limited to a particular invention unless otherwise limited.

[0047] Throughout the description and claims of this invention, the singular includes the plural unless otherwise stated.

[0048] Throughout the description and claims, "or" includes "and" unless otherwise stated. Thus, "comprising A or B" means the three cases of including A, including B, or including both A and B.

[0049] The electrode current collector of the present specification is configured in a sheet form, and includes both a coated portion coated with an electrode active material and an uncoated portion not coated with an electrode active material as a target to which a coating prevention material and an electrode active material are applied, before and after the formation of the coated portion.

[0050] The electrode active material is used to mean not only an electrode active material but also an electrode slurry or electrode mixture containing a conductive material, a binder, a solvent, and an additive, and includes both a positive electrode active material and a negative electrode active material.

[0051] The invention will be explained below with reference to the drawings and with reference to detailed embodiments.

[0052] Fig. 1 is a cross-sectional view of an electrode manufacturing apparatus according to a first embodiment of the present invention, and Fig. 2 is a partial perspective view of the electrode manufacturing apparatus shown in Fig. 1. Referring to Figs. 1 and 2, the electrode manufacturing apparatus according to the present invention includes an unwinder 200 that unwinds an electrode current collector 100 that is not coated with an electrode active material, a rewinder 300 that winds up the electrode current collector 100 that is coated with an electrode active material, a stamping member 400 that is located between the unwinder 200 and the rewinder 300 and that applies a coating prevention material to the electrode current collector 100 to prevent the electrode active material from being coated, an electrode active material supplying member 500 that coats the electrode current collector 100 with the electrode active material, and a drying member 600.

[0053] The electrode manufacturing apparatus of FIG. 1 is configured such that a first stamping unit 410 serving as a stamping member 400 positioned above the electrode current collector 100 and a first active material supply unit 510 serving as an electrode active material supply member 500 positioned above the electrode current collector 100 are positioned, so that a first coating prevention material 413 is applied only to the upper surface of the electrode current collector 100, and a first electrode active material 511 is coated thereon.

[0054] First, the stamping member 400 includes a first stamping body 411 having a cylindrical center portion with a rotation axis parallel to the width direction of the electrode current collector 100 and a plurality of protrusions protruding outward from the center portion at regular intervals, and a first application member 412 provided at the end of the protrusions of the first stamping body 411.

[0055] The first stamping body 411 rotates around the rotation axis to supply the coating prevention material to the first application member 412, and the first application member 412 discontinuously contacts the electrode current collector 100 to apply the first coating prevention material 413 onto the electrode current collector 100 at regular intervals.

[0056] Here, the first applicator 412 may be a porous and resilient material, such as a sponge, which absorbs the first coating prevention material 413 and then applies it to the electrode current collector 100. That is, the first coating prevention material 413 supplied to the first stamping body 411 is dispersed into the plurality of protrusions and supplied to the plurality of first applicators 412, and the plurality of first applicators 412 apply the first coating prevention material 413 onto the electrode current collector 100 every time they come into contact with the electrode current collector 100.

[0057] The first coating prevention material 413 is intended to prevent the first electrode active material 511 from being coated on the surface of the electrode current collector 100, and therefore should not be applied to the area where the electrode active material 511 is to be coated. That is, the spacing between the first coating prevention materials 413 may be the same as the length of the area of ​​the land portion 120 where the electrode active material is to be coated.

[0058] Therefore, the electrode current collector 100 unwound from the unwinder 200 is first coated with the first coating prevention material 413 by the stamping member 400, and then coated with the first electrode active material 511 by the electrode active material supplying member 500. Here, since the first stamping member 411 rotates in the transport direction A of the electrode current collector 100, there is no need to temporarily stop the electrode current collector 100 to coat the first coating prevention material 413.

[0059] The stamping member 400 discontinuously applies the coating prevention material 413, and in the case of the electrode active material supply member 500, it is preferable to provide and coat the first electrode active material 511 discontinuously, and it is more preferable to provide it discontinuously toward the area where the coating prevention material 413 is not applied.

[0060] The first coating prevention material 413 may include a hydrophobic material, while the first electrode active material 511 may include a hydrophilic material. Therefore, even if the first electrode active material 511 is partially provided in an area where the coating prevention material 413 is not applied, the first electrode active material 511 is not coated in the area where the first coating prevention material 413 is applied, and therefore, the first electrode active material 511 is coated only in the area where the first coating prevention material 413 is not applied.

[0061] Furthermore, since the first electrode active material 511 is applied between adjacent first coating prevention materials 413, the first coating prevention materials 413 can function as a dam that prevents the first electrode active material 511 from flowing down. Therefore, the electrode manufactured using the electrode manufacturing apparatus according to the present invention does not need to have a sliding portion, thereby solving problems that may arise from the formation of a sliding portion.

[0062] Meanwhile, in consideration of the purpose of providing the first coating prevention material 413 to the electrode current collector 100 to prevent the first electrode active material 511 from flowing down, the thickness of the first coating prevention material 413 may be formed to be thinner than the thickness of the first electrode active material 511, or may be formed to be the same thickness as the first electrode active material 511. Alternatively, in consideration of the fact that the first coating prevention material 413 contains a volatile material and is therefore removed from the desiccant, as described below, the thickness of the first coating prevention material 413 may be formed to be thicker than the thickness of the first electrode active material 511.

[0063] For example, the first coating prevention material may include a hydrophobic polymer and a hydrophobic solvent. The hydrophobic polymer may be at least one selected from the group consisting of polybutadiene, polyurethane, polyimide, polyester, polycarbonate, polyphenylene sulfide (PPS), polyolefin, polydimethylsiloxane (PDMS), styrene-butadiene copolymer, (meth)acrylate, polyacrylonitrile (PAN), polytetrafluoroethylene (PTFE), and mixtures thereof.

[0064] The hydrophobic solvent may be at least one selected from the group consisting of propanol, pentanol, butanol, hexanol, ethylene glycol, propylene glycol, diethylene glycol, glycerol, and mixtures thereof.

[0065] The first electrode active material 511 may include an electrode active material, a binder, a conductive material, an additive, and a solvent, and a hydrophilic material may be used as these.

[0066] For example, a polar solvent corresponds to the hydrophilic solvent constituting the first electrode active material 511, and a representative hydrophilic solvent is water. In addition, the hydrophilic binder may include at least one hydrophilic monomer selected from the group consisting of fumaric acid, (meth)acrylic acid, itaconic acid, sodium p-styrenesulfonate, sodium vinylsulfonate, sodium arylsulfonate, sodium 2-methylarylsulfonate, sodium ethyl methacrylate sulfonate, (meth)acrylamide, N-methylolacrylamide, N,N-dimethylacrylamide, and 2-acrylamido-2-methylpropanesulfonic acid.

[0067] Next, the drying member 600 is configured to dry the first electrode active material 511 and volatilize the first coating prevention material 413.

[0068] Specifically, the electrode current collector 100 provided with the first coating prevention material 413 and the first electrode active material 511 is dried while passing through the drying member 600. The drying member 600 may be configured in the form of the interior of a chamber through which the electrode current collector 100 can pass, or may be configured to heat and dry the upper and lower surfaces of the electrode current collector 100, respectively.

[0069] Since the first coating prevention material 413 contains a volatile material, the first coating prevention material 413 can be removed during the process of passing through the drying member.

[0070] As described above, since the present invention simultaneously dries the first coating prevention material and the first electrode active material, the manufacturing process is simpler than when the drying processes are performed separately, and manufacturing costs can be reduced.

[0071] As described above, the uncoated portion 110 from which the first coating prevention material 413 has been removed and the coated portion 120 coated with the first electrode active material 511 are formed on the electrode current collector 100 that has passed through the drying member 600. As the first coating prevention material 413 is removed from the drying member 600 in this manner, an electrode lead is connected to the uncoated portion 110 on which the first coating prevention material 413 has been provided.

[0072] 3 is a cross-sectional view of an electrode manufacturing apparatus according to a second embodiment of the present invention. Referring to FIG. 3, the electrode manufacturing apparatus according to the second embodiment is similar to the electrode manufacturing apparatus according to the first embodiment, except that a stamping member and an electrode active material supplying member are disposed not only on the upper surface but also on the lower surface of the electrode current collector.

[0073] Specifically, the stamping member 400 includes a pair of first and second stamping units 410 and 420 located on the upper and lower surfaces of the electrode current collector 100 to face each other. The electrode active material supplying member 500 also includes a pair of first and second active material supplying units 510 and 520 located on the upper and lower surfaces of the electrode current collector 100 to face each other.

[0074] The first coating prevention material 413 provided from the first stamping unit 410 and the second coating prevention material 423 provided from the second stamping unit 420 are provided to overlap each other on both sides of the electrode current collector 100, and the first electrode active material 511 provided from the first active material supply unit 510 and the second electrode active material 521 provided from the second active material supply unit 520 are provided to overlap each other on both sides of the electrode current collector 100.

[0075] For example, FIG. 3 shows that the first coating prevention material 413 and the second coating prevention material 423 are simultaneously provided on the upper and lower surfaces of the electrode current collector 100, and that the first electrode active material 511 and the second electrode active material 521 are simultaneously provided. However, it goes without saying that, instead, the first coating prevention material 413 and the first electrode active material 511 can be provided on one of the upper and lower outer surfaces of the electrode current collector 100 and dried, and then the second coating prevention material 423 and the second electrode active material 521 can be provided on the remaining surface of the electrode current collector 100 and dried.

[0076] 4 is a cross-sectional view of an electrode manufacturing apparatus according to a third embodiment of the present invention. Referring to FIG. 4, the electrode manufacturing apparatus according to the first embodiment has the same configuration as the first embodiment except for the stamping member.

[0077] The stamping member 400 according to the third embodiment includes a first stamping body 411 having a substantially rectangular parallelepiped shape and a first applying member 412 provided on the lower surface of the first stamping body 411. The first stamping body 411 applies a first coating prevention material 413 to the outer surface of the electrode current collector 100 at regular intervals while moving up and down by a cylinder (not shown) or a servo motor (not shown).

[0078] As described above, the first applicator 412 is made of a sponge or the like that can absorb the first coating prevention material 413, and when the first coating prevention material 413 is supplied to the first applicator 412 through the first stamping body 411, the first coating prevention material 413 can be provided on the electrode current collector 100 every time the first applicator 412 comes into contact with the electrode current collector 100.

[0079] For example, although Fig. 4 shows the stamping member 400 and the electrode active material supplying member 500 disposed only on the upper surface of the electrode current collector 100, the stamping member 400 and the electrode active material supplying member 500 may also be disposed on the lower surface of the electrode current collector 100. Also, the first and second coating prevention materials may be simultaneously applied to the upper and lower surfaces of the electrode current collector, and the first and second electrode active materials may also be simultaneously applied. Alternatively, it is possible to apply the first coating prevention material and the first electrode active material to the upper surface of the electrode current collector and then dry them, and then apply the second coating prevention material and the second electrode active material to the lower surface of the electrode current collector and then dry them.

[0080] 5 is a flowchart showing the steps of a method for manufacturing an electrode according to the present invention. Referring to FIG. 5, the method for manufacturing an electrode according to the present invention includes a first step of providing an electrode current collector, a second step of applying a coating prevention material to the electrode current collector, a third step of applying an electrode active material to the electrode current collector to form a coating layer, and a fourth step of drying the electrode current collector coated with the coating prevention material and the electrode active material.

[0081] That is, when an electrode current collector is provided, a coating prevention material is first provided on the electrode current collector, and then an electrode active material is coated on the outer surface of the electrode current collector on which the coating prevention material is provided.

[0082] In the second step, the coating prevention material is applied at regular intervals, and in the third step, the electrode active material is not coated in the area where the coating prevention material was applied, and only in the area where the coating prevention material is not applied, a ground portion is formed where the electrode active material is coated.

[0083] In particular, when an electrode active material is applied to an electrode current collector provided with a coating prevention material, the hydrophilic electrode active material is not coated on the surface of the hydrophobic coating prevention material, and therefore, a land area where the electrode active material is applied is formed only in the area where the coating prevention material is not provided. Of course, the coating prevention material can also serve as a support that prevents the electrode active material from flowing down before drying.

[0084] In the fourth step, the volatilizable hydrophobic material contained in the coating prevention material is volatilized and removed as it passes through the drying member. Therefore, the ground portion is not only in a form without a sliding portion, but also the electrode current collector is exposed in the area where the coating prevention material was applied, making it possible to attach an electrode lead.

[0085] The method for manufacturing an electrode according to the present invention may further include forming an electrode lead in the area where the coating prevention material is applied, and slitting the electrode current collector coated with the coating prevention material and the electrode active material.

[0086] Here, the order of the electrode lead forming step and the slitting step is not particularly limited.

[0087] In this regard, FIG. 6 shows an example for explaining a process of manufacturing a unit electrode from an electrode current collector having a coated portion and an uncoated portion formed thereon using an electrode manufacturing apparatus according to the present invention.

[0088] Referring to FIG. 6, first, an electrode current collector that has passed through a drying member can be formed into an uncoated portion 110 that is not coated with an electrode active material and a coated portion 120 that is coated with an electrode active material (step (a)).

[0089] Then, in step (b), the electrode current collector coated with the coating prevention material and the electrode active material is slit. In the case of FIG. 6, four unit electrodes 10 can be manufactured by the slitting process, which separates the electrode current collector at the boundary between the uncoated portion 110 and the coated portion 120.

[0090] In step (c), the coating prevention material is volatilized by a drying process, and the electrode lead 111 is connected to the exposed area of ​​the electrode current collector 100 .

[0091] The unit electrode 10 thus manufactured may be a positive electrode or a negative electrode. After the electrode lead is attached to the electrode current collector, a separator is interposed between the positive electrode and the negative electrode, and the electrode is wound up to manufacture a jelly roll type electrode assembly.

[0092] Alternatively, although FIG. 6 shows a configuration in which one electrode lead 111 is attached to one unit electrode 10, a configuration in which multiple electrode leads are arranged at intervals on one unit electrode 10 is also included within the scope of the present invention.

[0093] As described above, the unit electrode manufactured according to the present invention does not have a sliding portion formed on the ground portion, and therefore when laminated with a separator, no floating area is formed between the unit electrode and the separator, thereby preventing the conventional problems of increased resistance, electrolyte depletion, and lithium deposition.

[0094] Those skilled in the art will be able to make various applications and modifications within the scope of the present invention based on the above content.

[0095] In particular, it goes without saying that the present invention can be applied to a process for manufacturing a plate-type electrode having an electrode tab formed thereon by slitting and notching an electrode current collector. [Explanation of symbols]

[0096] 10 unit electrodes

[0097] 100 Electrode current collector

[0098] 110 Plain section

[0099] 111 Electrode lead

[0100] 120 Landed section

[0101] 130 Slitting Line

[0102] 200 Unwinder

[0103] 300 Rewinder

[0104] 400 stamping parts

[0105] 410 First Stamping Department

[0106] 411 First stamping body 412 First coating member

[0107] 413 First coating prevention substance

[0108] 420 Second Stamping Department

[0109] 421 Second stamping body 422 Second coating member

[0110] 423 Second coating prevention substance

[0111] 500 Electrode active material supply member

[0112] 510 1st active material supply section 511 First electrode active material

[0113] 520 2nd active material supply section 521 2nd electrode active material

[0114] 600 Drying material

Claims

1. an unwinder that unwinds an electrode current collector that is not coated with an electrode active material; a rewinder that winds up the electrode current collector coated with the electrode active material; a stamping member positioned between the unwinder and the rewinder, which applies a coating prevention material to the electrode current collector to prevent the electrode active material from being coated; an electrode active material supplying member for coating the electrode current collector with an electrode active material.

2. The electrode manufacturing apparatus according to claim 1 , wherein the coating prevention material includes a hydrophobic material.

3. The electrode manufacturing apparatus according to claim 2 , wherein the coating prevention substance includes a volatile substance.

4. The electrode manufacturing apparatus according to claim 3 , further comprising a drying member for drying the electrode active material and volatilizing the coating prevention material.

5. The electrode manufacturing apparatus according to claim 1 , wherein the stamping members are a pair of members positioned on the upper and lower surfaces of the electrode current collector so as to face each other.

6. 2. The electrode manufacturing apparatus of claim 1, wherein the stamping member comprises: a stamping body including a cylindrical center portion having a rotation axis parallel to a width direction of the electrode current collector and a plurality of protrusions protruding outward from the center portion at regular intervals; and a coating member provided at an end of the protrusion of the stamping body.

7. 7. The electrode manufacturing apparatus of claim 6, wherein the stamping body supplies the coating prevention material to the applicator while rotating about the rotation axis, and the applicator applies the coating prevention material to the electrode current collector at regular intervals while discontinuously contacting the electrode current collector.

8. The electrode manufacturing apparatus according to claim 7 , wherein the stamping body rotates in a direction in which the electrode current collector is transported.

9. The electrode manufacturing apparatus according to claim 1 , wherein the electrode active material supplying members are a pair of members positioned on the upper and lower surfaces of the electrode current collector so as to face each other.

10. The electrode manufacturing apparatus according to claim 1 , wherein the electrode active material includes a hydrophilic material.

11. An electrode manufacturing method using the electrode manufacturing apparatus according to any one of claims 1 to 10, a first step of providing an electrode current collector; a second step of applying an anti-coating material to the electrode current collector; a third step of applying an electrode active material to the electrode current collector to form a coating layer; and a fourth step of drying the electrode current collector coated with the coating prevention material and the electrode active material.

12. The method of claim 11, wherein the coating prevention material is applied at regular intervals in the second step.

13. The method for manufacturing an electrode according to claim 11 , wherein the electrode active material is not coated on the area where the coating prevention material is applied.

14. The method of claim 11 , further comprising the step of connecting an electrode lead to the electrode current collector after removing the coating prevention material from the area where the coating prevention material is applied.

15. The method of claim 11 , further comprising, after the fourth step, slitting the electrode current collector coated with the coating prevention material and the electrode active material.

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