WO2013168910A1 - 금속메쉬층을 포함하는 전지용 집전체 및 이의 제조방법 - Google Patents
금속메쉬층을 포함하는 전지용 집전체 및 이의 제조방법 Download PDFInfo
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- WO2013168910A1 WO2013168910A1 PCT/KR2013/003371 KR2013003371W WO2013168910A1 WO 2013168910 A1 WO2013168910 A1 WO 2013168910A1 KR 2013003371 W KR2013003371 W KR 2013003371W WO 2013168910 A1 WO2013168910 A1 WO 2013168910A1
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- metal mesh
- layer
- adhesive layer
- base substrate
- mesh layer
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/72—Grids
- H01M4/74—Meshes or woven material; Expanded metal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0438—Processes of manufacture in general by electrochemical processing
- H01M4/045—Electrochemical coating; Electrochemical impregnation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the present invention relates to a battery current collector including a metal mesh layer and a method of manufacturing the same, and more particularly, to a battery current collector including a metal mesh layer capable of preventing detachment of an active material and a method of manufacturing the same.
- the lithium secondary battery has an operating voltage of 3.6 V or more, which is three times higher than that of a nickel-cadmium battery or a nickel-hydrogen battery, which is widely used as a power source for portable electronic devices, and rapidly expands in terms of high energy density per unit weight. There is a trend.
- Lithium secondary batteries generate electrical energy by oxidation and reduction reactions when lithium ions are intercalated / deintercalated at the positive and negative electrodes.
- a lithium secondary battery is prepared by using a material capable of reversibly intercalating / deintercalating lithium ions as an active material of a positive electrode and a negative electrode, and filling an organic electrolyte or a polymer electrolyte between the positive electrode and the negative electrode.
- a lithium secondary battery includes an electrode assembly in which a negative electrode plate and a positive electrode plate are wound in a form such as a jelly-roll with a separator interposed therebetween, a can containing the electrode assembly and the electrolyte, and a can of the can It consists of a cap assembly assembled to the top.
- the negative electrode plate and the positive electrode plate may be formed by coating each active material, that is, a negative electrode active material or a positive electrode active material on each current collector, for example, a negative electrode current collector or a positive electrode current collector.
- the active material is detached from the current collector while repeating the charging and discharging of several tens to hundreds of times, thereby deteriorating battery efficiency.
- An object of the present invention is to provide a method for manufacturing a current collector for secondary batteries that can prevent the positive electrode active material or negative electrode active material from being detached from the negative electrode current collector or the positive electrode current collector.
- the present invention provides a base substrate; An adhesive layer positioned on the base substrate; And a metal mesh layer disposed on the adhesive layer, wherein the metal mesh layer includes a plurality of metal mesh patterns and a hole disposed between the metal mesh patterns.
- the present invention provides a method for preparing a base substrate comprising: providing a base substrate; Providing a metal mesh layer including a plurality of metal mesh patterns and a hole located between the metal mesh patterns; Forming an adhesive layer on the base substrate; And positioning a metal mesh layer on the adhesive layer and compressing the metal mesh layer.
- the present invention is a base substrate; A metal mesh layer positioned on the base substrate; And an adhesive layer disposed between the base substrate and the metal mesh layer, wherein the metal mesh layer includes a plurality of metal mesh patterns and a hole located between the metal mesh patterns.
- the present invention provides a method for preparing a base substrate comprising: providing a base substrate; Providing a metal mesh layer including a plurality of metal mesh patterns and a hole located between the metal mesh patterns; Forming an adhesive layer on the metal mesh layer; And positioning the adhesive layer on the base substrate and compressing the adhesive layer.
- the active material is applied on the metal mesh layer through the holes of the metal mesh layer, thereby increasing the contact area of the metal mesh layer and the active material, thereby suppressing detachment of the active material from the current collector
- the cycle life characteristics of the battery can be improved.
- the active material since the active material is also applied to the adhesive layer through holes located between the metal mesh patterns, the active material may be more firmly coated according to the adhesive property of the adhesive layer.
- FIG. 1 is an exploded cross-sectional view illustrating an electrode assembly of a typical lithium secondary battery.
- Figure 3 is a cross-sectional view showing a current collector for a secondary battery according to a second embodiment of the present invention.
- Figure 4 is a schematic perspective view showing a mesh-type negative electrode drum of the metal mesh manufacturing apparatus according to the present invention
- Figure 5 is a cross-sectional view showing a part of the mesh-type negative electrode drum
- Figure 6 is for producing a metal mesh according to the present invention It is a schematic block diagram which shows a continuous pole apparatus
- FIG. 7 is a process flowchart which shows the manufacturing method of the metal mesh which concerns on this invention.
- FIGS. 8 to 11 are cross-sectional views illustrating a method of manufacturing a current collector for a secondary battery according to the present invention.
- FIG. 12 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a first embodiment of the present invention
- Figure 13 is a process showing a method of manufacturing a current collector for a secondary battery according to a first embodiment of the present invention
- 14 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a second embodiment of the present invention.
- Figure 15 is a schematic configuration diagram for manufacturing a secondary battery current collector according to a modification of the first embodiment of the present invention
- Figure 16 is a method of manufacturing a current collector for secondary batteries according to a modification of the first embodiment of the present invention
- 17 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a modification of the second embodiment of the present invention.
- FIG. 18 is a photograph showing an example of the metal mesh layer according to the present invention
- FIG. 19 is a photograph showing another example of the metal mesh layer according to the present invention.
- FIG. 20 is a cross-sectional view showing a current collector for a secondary battery according to a third embodiment of the present invention
- Figure 21 is a cross-sectional view showing a current collector for a secondary battery according to a fourth embodiment of the present invention
- Figure 22 is a view of the present invention It is sectional drawing which shows the electrical power collector for secondary batteries which concerns on 5th Example.
- FIG. 23 is a photograph showing a cross section of a metal mesh pattern of a secondary battery current collector according to a third embodiment of the present invention
- FIG. 24 is a cross section of a metal mesh pattern of a current collector for secondary batteries according to a fourth embodiment of the present invention
- 25 is a photograph showing a cross section of a metal mesh pattern of a current collector for a secondary battery according to a fifth embodiment of the present invention.
- 26 is a cross-sectional view illustrating a current collector for a secondary battery according to a sixth embodiment of the present invention.
- FIG. 27 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a sixth embodiment of the present invention
- FIG. 28 is a process illustrating a method of manufacturing a current collector for a secondary battery according to a sixth embodiment of the present invention. It is a flow chart.
- FIG. 29 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a modification of the sixth embodiment of the present invention
- FIG. 30 is a method of manufacturing a current collector for a secondary battery according to a modification of the sixth embodiment of the present invention. It is a process flowchart showing the following.
- FIG. 31 is a cross-sectional view illustrating a current collector for a secondary battery according to a seventh embodiment of the present invention
- FIG. 32 is a cross-sectional view illustrating a current collector for a secondary battery according to an eighth embodiment of the present invention.
- 33 to 36 are cross-sectional views illustrating a method of manufacturing a current collector for a secondary battery according to a seventh embodiment of the present invention.
- FIG. 37 is a schematic structural diagram for manufacturing a current collector for a secondary battery according to a seventh embodiment of the present invention
- FIG. 38 is a process illustrating a method of manufacturing a current collector for a secondary battery according to a seventh embodiment of the present invention
- 39 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to an eighth embodiment of the present invention.
- FIG. 40 is a schematic configuration diagram for manufacturing a secondary battery current collector according to a modification of the seventh embodiment of the present invention
- FIG. 41 is a method of manufacturing a current collector for secondary batteries according to a modification of the seventeenth embodiment of the present invention
- 42 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a modification of the eighth embodiment of the present invention.
- first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, of course, the first component mentioned below may be a second component within the technical spirit of the present invention.
- spatially relative terms below “, “ beneath “, “ lower”, “ above “, “ upper” It can be used to easily describe a component's correlation with other components. Spatially relative terms are to be understood as including terms in different directions of components in use or operation in addition to the directions shown in the figures. For example, when flipping a component shown in the drawing, a component described as “below” or “beneath” of another component may be placed “above” the other component. Can be. Thus, the exemplary term “below” can encompass both an orientation of above and below. The components can be oriented in other directions as well, so that spatially relative terms can be interpreted according to the orientation.
- FIG. 1 is an exploded cross-sectional view illustrating an electrode assembly of a typical lithium secondary battery.
- an electrode assembly 1 of a general lithium secondary battery includes a first electrode 10 (hereinafter referred to as an anode), a second electrode 20 (hereinafter referred to as a cathode), and separators 2a and 2b. ).
- the electrode assembly 1 may have the positive electrode 10, the negative electrode 20, and the separators 2a and 2b stacked and wound to form a jelly roll.
- the separator may include a first separator 2b positioned between the anode 10 and the cathode 20 and a second separator 2a positioned below or above the two electrodes 10 and 20.
- the two electrodes stacked and wound are interposed in abutting part to prevent a short circuit between the two electrodes.
- the separator may be formed of a thermoplastic resin such as polyethylene (PE), polypropylene (PP), and the like, but the present invention is not limited to the material of the separator.
- the positive electrode 10 is a positive electrode current collector 11 that collects electrons generated by a chemical reaction and transfers them to an external circuit, and a slurry for the positive electrode including a positive electrode active material is coated on one or both surfaces of the positive electrode current collector 11. Consisting of positive electrode active material layers 12a and 12b.
- the anode 10 may include an insulating member 13 formed to cover at least one of both ends of the cathode active material layers 12a and 12b.
- one side or both sides of both ends of the positive electrode current collector 11 is not coated with a slurry for the positive electrode including the positive electrode active material, so that the positive electrode non-coating portion is formed to expose the positive electrode current collector 11, and the positive electrode non-coating portion is formed on the positive electrode non-coating portion. Electrodes collected in the whole 11 are transferred to an external circuit, and a positive electrode tab 14, which may be formed of a thin plate made of nickel or aluminum, is bonded.
- a protective member 14a may be provided at an upper surface of the portion where the positive electrode tab 14 is bonded.
- the positive electrode current collector 11 may be stainless steel, nickel, aluminum, titanium or alloys thereof, or a surface treated with carbon, nickel, titanium, or silver on the surface of aluminum or stainless steel, among which aluminum or aluminum An alloy is preferable and the material of the positive electrode current collector 11 is not limited in the present invention.
- the cathode active material of the cathode active material layer includes a cathode active material capable of reversibly intercalating and deintercalating lithium ions.
- Representative examples of the cathode active material include LiCoO 2 , LiNiO 2 , LiMnO 2 , and LiMn 2 O 4.
- lithium-transition metal oxides such as LiNi1-x-yCo xMyO 2 (0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, 0 ⁇ x + y ⁇ 1, M is a metal such as Al, Sr, Mg, La, etc.) It may be used, but does not limit the type of the positive electrode active material in the present invention.
- the negative electrode 20 includes a negative electrode current collector 21 for collecting electrons generated by a chemical reaction and delivering the electrons to an external circuit, and a negative electrode slurry including a negative electrode active material on one or both surfaces of the negative electrode current collector 21. It consists of the negative electrode active material layers 22a and 22b apply
- the negative electrode 20 may include an insulating member 23 formed to cover at least one of both ends of the negative electrode active material layers 22a and 22b.
- one side or both sides of both ends of the negative electrode current collector 21 is not coated with the negative electrode slurry containing the negative electrode active material, so that the negative electrode non-coating portion is formed to expose the negative electrode current collector 21 as it is, and the negative electrode non-coating portion has a negative electrode Electrodes collected in the current collector 21 are transferred to an external circuit, and a negative electrode tab 24, which may be formed of a thin plate made of nickel, is bonded.
- a protective member 24a may be provided at an upper surface of a portion at which the negative electrode tab 24 is bonded.
- the negative electrode current collector 21 a surface treated with carbon, nickel, titanium, silver on the surface of stainless steel, nickel, copper, titanium or alloys thereof, copper or stainless steel, and the like, and among them, copper or copper An alloy is preferable and the material of the negative electrode current collector 23a is not limited in the present invention.
- the negative electrode active material of the negative electrode active material layer may include a negative electrode active material capable of intercalating and deintercalating lithium ions, and the negative electrode active material may be a crystalline or amorphous carbon or a carbon-based negative electrode active material of a carbon composite.
- the present invention is not limited to the type of the negative electrode active material.
- the negative electrode and the positive electrode are coated with respective active materials, that is, the negative electrode active material or the positive electrode active material, on each current collector, for example, the negative electrode current collector or the positive electrode current collector, to function as a secondary battery.
- the secondary battery current collector according to the present invention may be a negative electrode current collector or a positive electrode current collector as described above
- the secondary battery in the present invention is a concept including all kinds of secondary batteries capable of repeating the charging and discharging
- it may be a secondary battery including the electrode assembly as shown in FIG. 1 described above.
- Figure 3 is a cross-sectional view showing a current collector for a secondary battery according to a second embodiment of the present invention.
- the secondary battery current collector 100 includes a base substrate 110.
- the base substrate 110 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector.
- the base substrate 110 may include carbon, nickel, titanium, or silver on the surface of stainless steel, nickel, aluminum, titanium, or an alloy thereof, aluminum, or stainless steel.
- the thing etc. which were processed can be used, Among these, aluminum or an aluminum alloy is preferable.
- the base substrate 110 is a surface treatment of carbon, nickel, titanium, silver on the surface of stainless steel, nickel, copper, titanium or their alloys, copper or stainless steel The thing etc. can be used and a copper or copper alloy is preferable among these.
- the secondary battery current collector 100 includes a first adhesive layer 120a positioned on the first surface of the base substrate 110.
- the second adhesive layer 120b is disposed on the second surface of the base substrate 110.
- the first adhesive layer 120a and the second adhesive layer 120b are for attaching a metal mesh layer to be described later on the base substrate 110, and the first adhesive layer and the second adhesive layer may be solder layers.
- the layer may be made of lead (Pb), tin (Sn), zinc (Zn), indium (In), cadmium (Cd), bismuth (Bi), or alloys thereof.
- the secondary battery current collector 100 may include a first metal mesh layer 130a and a second adhesive layer on the first adhesive layer 120a. And a second metal mesh layer 130b positioned on 120b.
- the metal mesh layers 130a and 130b may be formed of at least one of copper (Cu), silver (Ag), chromium (Cr), nickel (Ni), iron (Fe), cobalt (Co), and alloys thereof. Although it may be made, the present invention is not limited to the material of the metal mesh layer.
- the metal mesh layer also serves as a current collector inherent to a secondary battery.
- the metal mesh layer is preferably aluminum or an aluminum alloy.
- the metal mesh layer is preferably copper or a copper alloy.
- the first metal mesh layer 130a includes a first hole 132a positioned between the plurality of first metal mesh patterns 131a and the first metal mesh pattern 131a
- the second The metal mesh layer 130b includes a plurality of second metal mesh patterns 131b and a second hole 132b positioned between the second metal mesh patterns 131b.
- the secondary battery current collector 100 includes metal mesh layers 130a and 130b formed on the first and second surfaces of the base substrate 110, respectively.
- the mesh layer includes a plurality of metal mesh patterns 131a and 131b and holes 132a and 132b positioned between the metal mesh patterns, respectively, in which an adhesive layer 120a is attached to the base substrate and the metal mesh layer. , 120b).
- a metal mesh layer is attached to the current collector to be coated with the active material, more specifically, the base substrate through an adhesive layer, and the metal mesh layer includes holes 132a and 132b positioned between the metal mesh patterns. Therefore, an active material is applied onto the metal mesh layer through the holes 132a and 132b, thereby increasing the contact area between the metal mesh layer and the active material, thereby suppressing detachment of the active material from the current collector, Cycle life characteristics can be improved.
- the active material is applied on the metal mesh layer, in this case, the active material is also applied to the adhesive layer through a hole located between the metal mesh pattern, accordingly, according to the adhesive properties of the adhesive layer, The active material can be applied more firmly.
- the secondary battery current collector 200 includes a base substrate 210, an adhesive layer 220 and an adhesive layer (located on the base substrate 210). And a metal mesh layer 230 positioned on the 220.
- the metal mesh layer 230 includes a plurality of metal mesh patterns 231 and holes 232 disposed between the metal mesh patterns 231.
- the positive electrode may apply the positive electrode active material to one side or both sides of the positive electrode current collector.
- the secondary battery current collector 200 is an embodiment in which the metal mesh layer 230 is formed only on one surface of the base substrate 210. Therefore, in the present invention, the metal mesh layer is It can be formed in the 1st surface and / or 2nd surface of a base base material.
- the current collector for the secondary battery according to the second embodiment may be the same as the current collector for the secondary battery according to the first embodiment except as described above, a detailed description thereof will be omitted.
- Figure 4 is a schematic perspective view showing a mesh-type negative electrode drum of the metal mesh manufacturing apparatus according to the present invention
- Figure 5 is a cross-sectional view showing a part of the mesh-type negative electrode drum
- Figure 6 is for producing a metal mesh according to the present invention It is a schematic block diagram which shows a continuous pole apparatus
- FIG. 7 is a process flowchart which shows the manufacturing method of the metal mesh which concerns on this invention.
- the mesh type cathode drum 40 of the metal mesh manufacturing apparatus has a constant width surrounding the rotating shaft 41b and the rotating shaft 41b to be rotatable
- the branch includes a cylindrical drum 41a.
- one side end of the rotating shaft 41b may be coupled to a chain connected to a motor providing a rotational force so that the drum 41a is rotated.
- a mesh 42 having a shape to be manufactured is formed on the surface of the drum 40.
- the mesh 42 may be formed in a net shape in which a plurality of hexagons are connected to each other, and may be configured as a honeycomb, but the shape of the mesh may be a quadrangle, a triangle, a pentagon, and the like.
- the shape of the mesh is not limited.
- the mesh 42 may be formed of a single metal or an alloy according to the component of the electrolyte to be plated. It can be configured to be used, by directly processing the surface of the cylindrical drum (41a) to be formed integrally with the cylindrical drum (41a), or a weaving type or arrangement formed by weaving like a thread with a metal wire It can be used by attaching the mesh 50 processed into a batch type to the surface of the said cylindrical drum 41a.
- an insulating layer 43 is positioned in a space between the mesh 42 and the mesh 42, and the insulating layer is made of plastic such as epoxy resin, Teflon resin, or fluororesin. It may be a resin.
- insulating layer 43 in the space between the mesh and the mesh, after forming the mesh 42 of the shape to be manufactured on the surface of the cylindrical drum (41a) as described above, known spray method or The insulating material may be applied by a vapor deposition method, and the cross section may be planarized by a known chemical mechanical polishing (CMP) process.
- CMP chemical mechanical polishing
- a metal mesh layer (not shown) is formed on the mesh 42 of the surface of the mesh type cathode drum through the mesh type cathode drum 40, and the metal mesh layer (not shown) is peeled off. In this manner, the metal mesh can be formed by the electroforming process.
- the mesh type cathode drum corresponds to a pole master
- the pole master includes a mesh having a shape corresponding to the shape of the metal mesh layer to be manufactured so as to form the metal mesh layer by the pole casting process.
- all members which may be drum-type as shown in FIG. 4, alternatively, may be flat-type, and thus, in the present invention, the electric pole master for the electroplating process may be a drum-type or a flat plate.
- the electric pole master according to the present invention is formed on the base plate and the base plate, and includes a mesh of a shape corresponding to the shape of the metal mesh layer to be manufactured, the shape of the base plate is a drum type, the present invention
- the master pole according to the present invention may be a drum type, and when the shape of the base plate is flat, it means that the master pole according to the present invention may be a flat type.
- the continuous electroplating apparatus for manufacturing a metal mesh includes an electrolytic cell 34 containing an electrolytic solution to be plated, and a portion of the electrolytic cell 34 immersed in the electrolytic solution of the electrolytic cell 34.
- a mesh basket which is rotated by a power source and a cathode-type basket (31) which is installed to be completely immersed in the electrolyte of the electrolytic cell (34) and formed in a shape corresponding to the mesh-type cathode drum (40) and maintains a constant distance. ) May be included.
- the electrolyte is formed of at least one of copper (Cu), silver (Ag), chromium (Cr), nickel (Ni), iron (Fe), cobalt (Co) and alloys thereof to form a metal mesh layer according to the present invention. It may be made of any one material, but does not limit the type of the electrolyte in the present invention.
- the electrolytic cell 34 has a semi-cylindrical shape in which the lower surface of the electrolytic cell is perforated downward, and the electrolytic cell 34 has an electrolytic solution to be plated on the surface of the mesh type cathode drum 40. Can be accommodated.
- an auxiliary tank 30 is formed below the electrolyzer 34 to accommodate the electrolyte flowing from the electrolyzer 34 so that the electrolyte is accommodated in a dual structure of the electrolyzer 34 and the auxiliary tank 30. Can be.
- a part of the rotating mesh type cathode drum 40 that is, about half, is immersed in the electrolytic cell 34, and the electrolytic cell 34 of the electrolytic cell 34 is injected into the electrolytic solution injection passage 32 to be described later.
- the electrolyte is stirred, and the electrolyte flowing through the electrolytic cell 34 while the electrolyte is stirred by the injection of the electrolyte in the electrolyte injection passage 32 is configured to be accommodated in the auxiliary tank 30.
- the electrolyzer 34 is provided with a mesh type cathode drum 40 which is immersed in the electrolyte and rotates about halfway.
- the mesh type cathode drum 40 is connected to the cathode (-) of the power applied to the cylindrical drum 41a having a constant width while surrounding the rotating shaft 41b and the rotating shaft 41b to be rotatable. Can be formed.
- one end of the rotary shaft 41b is provided with a power supply for supplying a negative electrode (-) from the rectifier, the other end to provide a rotational force to rotate the cylindrical drum (41a)
- the motor can be coupled.
- a mesh 42 having a shape corresponding to a plurality of holes (132a and 132b of FIG. 2) provided in the metal mesh to be manufactured may be formed on the surface of the cylindrical drum 41a.
- the mesh 42 may be formed in a net shape in which a plurality of hexagons are connected to each other and may be configured in a honeycomb form.
- An anode basket 31 formed of an insoluble anode (+) or titanium (Ti) is installed under the mesh type cathode drum 40.
- the anode basket 31 is formed so as to be immersed in the electrolyte of the electrolytic cell 34 and formed in the shape of an arc cut in half so as to correspond to the mesh type cathode drum 40 to maintain a constant distance.
- a metal cluster 33 having the same component as the electrolyte of the electrolytic cell 34 may be accommodated inside the anode basket 31.
- the metal cluster 33 is enclosed and stored in a separation prevention net to prevent the inside of the positive electrode basket 31 from being separated into the electrolytic cell 34.
- the metal cluster 33 serves to match the amount and concentration of the electrolyte solution plated on the surface of the cylindrical drum 41a by dissolving in the electrolyte solution of the electrolytic cell 34 as a metal mass of the same component as the electrolyte solution of the electrolytic cell 34. Can be performed.
- An electrolyte injection flow path 32 for injecting an electrolyte solution to agitate the electrolyte solution of the electrolytic cell 34 may be formed at a lower end portion of the electrolytic cell 34, more specifically, at the center of the lower end of the positive electrode basket 31.
- the injection passage 32 may be formed as a cylindrical plastic pipe having a long length and communicating with an inside of the electrolytic cell 34.
- the continuous electroforming device may further include circulation-filtering means, wherein the circulation-filtering means circulates the electrolyte in the auxiliary tank 30 to the electrolyzer 34 while foreign matter in the electrolyte. It may serve to remove, but, since it is a general configuration will be omitted the following detailed description.
- the metal mesh 50 which is plated on the outer circumferential surface of the cylindrical drum 41a, is peeled off on the upper right side of the mesh type cathode drum 40.
- a guide roller 51 for vibrating may be provided, and a cleaning tank 60 for cleaning the surface of the metal mesh 50 may be provided.
- a winding roller 70 may be provided on the right side of the cleaning tank 60, and the winding roller 70 may continuously wind the cleaned metal mesh 50 via the cleaning tank 60.
- the current density in the electrodeposition step (S30) may be 0.1 to 30 mA / cm2, but does not limit the range of the current density in the present invention, depending on the material to be electrodeposited, the current density is different It can be done.
- the range of the current density of 0.1 to 1 mA / cm 2 may be a range in which electrodeposition of copper (Cu) is actively generated, the range of 3 to 15 mA / cm 2 is the nickel (Ni) May be a range in which electrodeposition is actively occurring.
- the electrodeposition of the metal mesh layer is preferably carried out within a certain temperature range of the electrolyte in order to be more actively electrodeposited in the above-described current density range.
- the copper (Cu) or nickel (Ni) may be actively electrodeposited when the temperature of the electrolyte is 10 to 50 °C, but is not limited to the temperature of the electrolyte in the present invention.
- a metal mesh layer is formed on the outer surface of the mesh type cathode drum 40, more specifically, on the mesh 42 (FIG. 5).
- an electrodeposition layer peeling step S40 for peeling the metal mesh layer from the outer surface of the mesh type cathode drum 40, in particular, the mesh is continued.
- the electrodeposition layer peeling step S40 is performed while the metal mesh layer attached to the outer surface of the mesh type cathode drum 40 is guided to the upper right side by the rotation of the guide roller 51.
- the protective film (not shown), such as PET, PC, PMMA, laminating it on top of the metal mesh layer formed on the mesh of the surface of the mesh-type cathode drum, the protective film (not even ) And the metal mesh layer may be peeled off at the same time to form the metal mesh 50 by the electroforming process.
- a protective film such as PET, PC, PMMA
- the electrodeposited layer washing step (S50) of immersing the metal mesh 50 separated from the mesh type cathode drum 40 into the washing tank 60 is washed.
- the metal mesh 50 washed through the electrodeposition layer washing step S50 is wound while being transferred to the winding roller 70, and the metal mesh winding step S60 is performed.
- the metal mesh 50 can be stored in a wound state on the winding roller 70, and can be applied to various fields by cutting the required length and shape as needed.
- the electrodeposition layer peeling step in the above, by applying an adhesive to a protective film (not shown), after laminating it on top of the metal mesh layer formed on the mesh of the surface of the mesh-type cathode drum, the protective film C) and the metal mesh layer are peeled off at the same time to form the metal mesh 50 by the electroforming process.
- the metal mesh layer may be separated from the mesh of the mesh type cathode drum without a protective film. In this case, since the thickness of the metal mesh layer is thin and difficult to process, the metal mesh 50 washed through the electrodeposition layer washing step S50 may be attached to a separate protective film.
- the metal mesh layer may be formed through the continuous electric pole apparatus for manufacturing the metal mesh, and the metal mesh layer formed may be used as the metal mesh layer of the current collector as described above.
- FIG. 8 to 11 are cross-sectional views illustrating a method of manufacturing a current collector for a secondary battery according to the present invention.
- a method of manufacturing the secondary battery current collector according to the present invention will be described based on the method of manufacturing the secondary battery current collector according to the first embodiment of the present invention of FIG.
- the metal mesh layer 130 is manufactured through the metal mesh manufacturing apparatus as described above.
- the metal mesh layer can also be produced by weaving or machining method, and thus, the metal mesh layer in the present invention It does not limit the method for producing the same.
- the width d1 of the metal mesh layer 130 may be 1 to 500 ⁇ m
- the thickness d2 of the metal mesh layer may be 1 to 500 ⁇ m
- the interval between the metal mesh pattern and the metal mesh pattern may also be used. That is, the size of the holes 132 located between the metal mesh patterns 131 may be 1 ⁇ m to 3 mm, but the present invention is not limited thereto.
- the first adhesive layer 120a is formed on the first surface of the base substrate 110
- the second adhesive layer 120b is formed on the second surface of the base substrate 110.
- the first adhesive layer 120a and the second adhesive layer 120b may be solder layers, and the solder layer may be formed by a known electroplating method or an electroless plating method, but the formation of the solder layer in the present invention. It does not limit the method.
- the thickness of the base substrate 110 is 1 ⁇ 100 ⁇ m
- the thickness of the first adhesive layer or the second adhesive layer may be 1 ⁇ 20 ⁇ m
- the thickness of the base substrate, the first adhesive layer and the second adhesive layer ( d3) may be 2 to 120 ⁇ m, but the present invention is not limited thereto.
- the first metal mesh layer 130a is positioned on the first adhesive layer 120a, and the second metal mesh layer 130b is positioned on the second adhesive layer 120b. Thereafter, the first metal mesh layer and the second metal mesh layer are pressed onto the first adhesive layer and the second adhesive layer, respectively, through a pressing roller.
- the constant temperature is 150 ⁇ 500 °C days Can be.
- a battery current collector including the metal mesh layer according to the present invention can be manufactured,
- the secondary battery current collector 100 is a metal mesh layer 130a, respectively formed on the first and second surfaces of the base substrate 110, 130b), wherein the metal mesh layer includes a plurality of metal mesh patterns 131a and 131b and holes 132a and 132b positioned between the metal mesh patterns, respectively, wherein the base substrate and the metal mesh Adhesive layers 120a and 120b for attaching the layers are included.
- FIG. 12 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a first embodiment of the present invention
- Figure 13 is a process showing a method of manufacturing a current collector for a secondary battery according to a first embodiment of the present invention
- 14 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a second embodiment of the present invention.
- the method of manufacturing the current collector for a secondary battery according to the second embodiment of the present invention may be the same as the method of manufacturing the first embodiment described above, except as will be described later. Reference is made.
- the method of manufacturing the current collector for secondary batteries according to the first embodiment of the present invention provides a base substrate 611 prepared from the base substrate supply unit 610 (S100).
- the base substrate 611 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector. As described above, detailed description thereof will be omitted.
- the base substrate is pretreated (S110).
- the pretreatment may be a general chemical pretreatment.
- the chemical pretreatment may be performed by immersing a target material, ie, a base substrate in an acidic or alkaline solution, such as pickling and degreasing, or spraying the solution on the target material, such as oil, It may be a method for removing contaminants, impurities, and the like.
- the pretreatment may be a chemical pretreatment method by immersing the base substrate in a pretreatment tank 601 containing a pretreatment solution, but is not limited to the method of pretreatment in the present invention, if necessary, The pretreatment step can be omitted.
- the first washing step is a process for removing the pretreatment solution used in the pretreatment process, and may be by a method of immersing the base substrate in the first washing tank 602 containing the washing solution.
- the method of washing with water is not limited, and if necessary, the first washing step can be omitted.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by a method of immersing the base substrate in a plating bath 603 including a plating solution.
- the method of forming the solder layer is not limited.
- a solder layer may be formed on the first and second surfaces of the base substrate, respectively.
- the second washing step is a step for washing the plating solution used in the adhesive layer forming process, and the like, and may be by a method of dipping the base substrate in the second washing tank 604 in which the washing solution is contained.
- the method of washing with water in the present invention is not limited, and if necessary, the second washing step can be omitted.
- the drying step may be hot air drying performed in the hot air drying furnace 605, but the present invention is not limited to the drying method, and the drying process may be omitted if necessary.
- the metal mesh layer 621 is manufactured through the metal mesh manufacturing apparatus as described above, and a metal mesh layer is provided (S160).
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted.
- the supply portion of the metal mesh layer 620a and 620b may be located on the first and second surfaces of the base substrate, respectively.
- the metal mesh layer is positioned on the adhesive layer of the base substrate including the adhesive layer and pressed by the pressing rollers 630a and 630b (S170).
- the first metal mesh layer provided from the metal mesh layer first supply part 620a is positioned on the first adhesive layer positioned on the first surface of the base substrate.
- the first metal mesh layer and the first metal mesh layer may be pressed onto the first adhesive layer and the second adhesive layer, respectively.
- the constant temperature is 150 ⁇ 500 °C days Can be.
- a current collector for a battery including the metal mesh layer according to the first embodiment of the present invention can be manufactured.
- the secondary battery current collector 631 includes a metal mesh layer formed on each of the first and second surfaces of the base substrate, the metal Each of the mesh layers includes a plurality of metal mesh patterns and holes located between the metal mesh patterns, and the mesh layer includes an adhesive layer for attaching the base substrate and the metal mesh layer.
- the method of manufacturing the current collector for secondary batteries according to the second embodiment of the present invention provides a base substrate 711 prepared from the base substrate supply unit 710.
- the base substrate is pretreated.
- the pretreatment may be a chemical pretreatment method by dipping the base substrate in a pretreatment bath 701 containing a pretreatment solution.
- the first washing step may be based on a method of immersing the base substrate in the first washing tank 702 containing the washing solution.
- an adhesive layer is formed on the base substrate.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by a method of immersing the base substrate in a plating bath 703 including a plating solution.
- a solder layer may be formed on one of the first and second surfaces of the base substrate, for example, the first surface, by attaching a separate protective film to the second surface of the base substrate.
- the solder layer may not be formed on the second surface of the base substrate.
- the second washing step is a process for washing the plating solution used in the adhesive layer forming process, and may be immersed in a method of immersing the base substrate in the second washing tank 604 containing the washing solution.
- the base substrate on which the adhesive layer is formed is dried.
- the drying step may be hot air drying performed in the hot air drying furnace 705.
- the metal mesh layer 721 is manufactured through the metal mesh manufacturing apparatus as described above to provide a metal mesh layer.
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted.
- the metal mesh layer is any one of the first surface and the second surface of the base substrate, for example, In order to supply to the first surface, the supply portion 720a of the metal mesh layer may be located only on the first surface of the base substrate.
- the positive electrode may apply the positive electrode active material to one side or both sides of the positive electrode current collector.
- the method of manufacturing the secondary battery current collector according to the second embodiment of the present invention is an embodiment in which the metal mesh layer is formed only on one surface of the base substrate. Therefore, in the present invention, the metal mesh layer is formed on the first surface of the base substrate. And / or on the second surface.
- the metal mesh layer is placed on the adhesive layer of the base substrate including the adhesive layer and pressed by the pressing rollers 730a and 730b.
- the first metal mesh layer provided from the metal mesh layer first supply part 720a is placed on the first adhesive layer positioned on the first surface of the base substrate. Afterwards, the first metal mesh layer may be pressed onto the first adhesive layer through a pressing roller.
- the constant temperature may be 150 ⁇ 500 °C.
- a battery current collector including the metal mesh layer according to the second embodiment of the present invention can be manufactured.
- the secondary battery current collector 731 includes a metal mesh layer formed on the first surface of the base substrate, the metal mesh layer is a plurality of A hole is disposed between the metal mesh pattern and the metal mesh pattern.
- the base layer may include an adhesive layer for attaching the base substrate and the metal mesh layer.
- FIG. 15 is a schematic configuration diagram for manufacturing a secondary battery current collector according to a modification of the first embodiment of the present invention
- Figure 16 is a method of manufacturing a current collector for secondary batteries according to a modification of the first embodiment of the present invention
- 17 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a modification of the second embodiment of the present invention.
- the method of manufacturing the current collector for secondary batteries according to the modification of the first embodiment of the present invention may be the same as the method of manufacturing the first embodiment described above.
- a method of manufacturing a current collector for a secondary battery according to a modification of the second embodiment of the present invention may be the same as the method of manufacturing the modification of the first embodiment described above, except as will be described later. Reference will be made to FIG. 16.
- a method of manufacturing a secondary battery current collector according to a modification of the first embodiment of the present invention provides a base substrate 811 prepared from the base substrate supply unit 810 (S200). ).
- the base substrate is pretreated (S210).
- the pretreatment may be a chemical pretreatment method by dipping the base substrate in a pretreatment bath 801 containing a pretreatment solution.
- the first washing step may be based on a method of immersing the base substrate in a first washing tank 802 containing a washing solution.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by a method of immersing the base substrate in a plating bath 803 including a plating solution.
- a solder layer may be formed on the first and second surfaces of the base substrate, respectively.
- the second washing step may be by a method of immersing the base substrate in a second washing tank 804 containing a washing solution.
- the drying step may be hot air drying performed in the hot air drying furnace 805.
- the metal mesh layer 821 including the protective film is manufactured through the metal mesh manufacturing apparatus as described above, and a metal mesh layer including the protective film is provided (S260). ).
- the electrodeposition layer peeling step of manufacturing a metal mesh layer by applying an adhesive to the protective film, it is laminated on top of the metal mesh layer formed on the mesh of the surface of the mesh-type cathode drum, the protection The film and the metal mesh layer can be peeled off simultaneously.
- the metal mesh washed through the electrodeposition layer washing step is separated for easy handling. It can also be attached to a protective film.
- the method of manufacturing a current collector for a secondary battery according to a modification of the first embodiment of the present invention corresponds to using the metal mesh layer including the protective film.
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted. Let's do it.
- the metal mesh layer in order to supply the metal mesh layer to the first surface and the second surface of the base substrate, the metal mesh layer
- the supply units 820a and 820b may be positioned on the first and second surfaces of the base substrate, respectively.
- the metal mesh layer is placed on the adhesive layer of the base substrate including the adhesive layer and pressed by the pressing rollers 830a and 830b (S270).
- a metal mesh layer on the opposite side on which the protective film is positioned is placed on the adhesive layer.
- the first metal mesh layer provided from the metal mesh layer first supply part 820a is disposed on the first adhesive layer positioned on the first surface of the base substrate.
- the constant temperature is 150 ⁇ 500 °C days Can be.
- the current collector 831 for the secondary battery that proceeds to step S270, because the metal mesh layer includes a protective film, the protective layer is included on the opposite surface of the metal mesh layer and the non-adhesive layer.
- the protective film is removed from the metal mesh layer at the end of use (S280).
- the modification of the first embodiment is because the protective film is included on the upper portion of the metal mesh layer, more specifically, the upper surface of the opposite side of the non-bonded metal mesh layer, Protective characteristics and storage characteristics of the current collector for secondary batteries may be easy.
- a battery current collector including a metal mesh layer according to a modification of the first embodiment of the present invention can be manufactured.
- a method of manufacturing a current collector for a secondary battery according to a modification of the second exemplary embodiment of the present invention provides a base substrate 911 prepared from the base substrate supply unit 910.
- the base substrate is pretreated.
- the pretreatment may be a chemical pretreatment method by dipping the base substrate in a pretreatment bath 901 containing a pretreatment solution.
- the first washing step may be by a method of immersing the base substrate in the first washing tank 902 containing the washing solution.
- an adhesive layer is formed on the base substrate.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by a method of immersing the base substrate in a plating bath 903 including a plating solution.
- a solder layer may be formed on one of the first and second surfaces of the base substrate, for example, the first surface, by attaching a separate protective film to the second surface of the base substrate.
- the solder layer may not be formed on the second surface of the base substrate.
- the second washing step is a process for washing the plating solution used in the adhesive layer forming process, and may be immersed in a method of immersing the base substrate in the second washing tank 904 containing the washing solution.
- the base substrate on which the adhesive layer is formed is dried.
- the drying step may be hot air drying performed in the hot air drying furnace 905.
- a metal mesh layer 921 including a protective film is manufactured through the metal mesh manufacturing apparatus as described above to provide a metal mesh layer including a protective film.
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted.
- the metal mesh layer is any one of the first surface and the second surface of the base substrate, for example
- the supply portion 920a of the metal mesh layer may be located only on the first surface of the base substrate.
- the positive electrode may apply the positive electrode active material to one side or both sides of the positive electrode current collector.
- the method of manufacturing a secondary battery current collector according to a modification of the second embodiment of the present invention is an embodiment in which a metal mesh layer is formed only on one surface of the base substrate.
- the metal mesh layer is formed of the base substrate. It may be formed on one side and / or the second side.
- the metal mesh layer is placed on the adhesive layer of the base substrate including the adhesive layer and pressed by the pressing rollers 930a and 930b.
- the first metal mesh layer provided from the metal mesh layer first supply unit 920a is disposed on the first adhesive layer located on the first surface of the base substrate. After positioning, the first metal mesh layer may be pressed onto the first adhesive layer through the pressing roller.
- the constant temperature may be 150 ⁇ 500 °C.
- the metal mesh layer includes a protective film in the current collector 931 for the secondary battery, the protective film is included on the opposite side of the adhesive layer and the non-bonded metal mesh layer. .
- the protective film is removed from the metal mesh layer at the end of use.
- the modification of the second embodiment is because the protective film is included on the upper portion of the metal mesh layer, more specifically, the upper surface of the opposite side of the non-bonded metal mesh layer, Protective characteristics and storage characteristics of the current collector for secondary batteries may be easy.
- a battery current collector including a metal mesh layer according to a modification of the second embodiment of the present invention can be manufactured.
- FIG. 18 is a photograph showing an example of the metal mesh layer according to the present invention
- FIG. 19 is a photograph showing another example of the metal mesh layer according to the present invention.
- the planar shape of the metal mesh layer according to the present invention may be a substantially rectangular shape, and as shown in FIG. 19, the planar shape of the metal mesh layer according to the present invention may be approximately hexagonal.
- the continuous pole device includes a cylindrical drum, according to the shape of the mesh formed on the surface of the cylindrical drum, The shape of the metal mesh layer can be determined.
- the mesh of the shape to be manufactured is formed on the surface of the cylindrical drum of the continuous electromotive apparatus, wherein the mesh is formed in a mesh shape in which a plurality of hexagons are connected, may be configured as a honeycomb form, In addition, it may be formed in the shape of a square, triangle, pentagons, etc., if the shape of the mesh is hexagon, the planar shape of the metal mesh layer is also hexagonal, if the shape of the mesh is a square, the metal mesh layer The planar shape of can also be square.
- the shape of the metal mesh layer is not limited in the present invention.
- FIG. 20 is a cross-sectional view showing a current collector for a secondary battery according to a third embodiment of the present invention
- Figure 21 is a cross-sectional view showing a current collector for a secondary battery according to a fourth embodiment of the present invention
- Figure 22 is a view of the present invention It is sectional drawing which shows the electrical power collector for secondary batteries which concerns on 5th Example.
- the current collectors for secondary batteries according to the third to fifth embodiments may be the same as the current collectors for secondary batteries according to the first embodiment, except as described below.
- the secondary battery current collector 300 may include metal mesh layers 330a and 330b formed on the first and second surfaces of the base substrate 110, respectively.
- the metal mesh layer may include a plurality of metal mesh patterns 331a and 331b and holes 332a and 332b positioned between the metal mesh patterns, respectively, wherein the base substrate and the metal mesh layer may be formed.
- the adhesive layers 120a and 120b for attaching are included.
- the shape of the metal mesh pattern of the secondary battery current collector according to the third embodiment of the present invention may be different from that of the first embodiment.
- the first metal mesh pattern 331a of the first metal mesh layer 330a includes a lower end portion 331a 2 and an upper end portion 331a 1
- the second metal mesh of the second metal mesh layer 330b includes a lower end portion 331b 2 and an upper end portion 331b 1 , wherein the widths of the upper end portions 331a 1 and 331b 1 are larger than the widths of the lower end portions 331a 2 and 331b 2 , respectively. It features.
- the width of the upper end portions 331a 1 and 331b 1 is greater than the width of the lower end portions 331a 2 and 331b 2 , thereby desorbing the active material applied onto the metal mesh layer through the holes 332a and 332b. It can prevent more efficiently.
- the upper end and the lower end are based on the surface of the base substrate to which each metal mesh layer is bonded, that is, the first metal mesh pattern is based on the first surface of the base substrate.
- the second metal mesh pattern may distinguish the upper end and the lower end based on the second surface of the base substrate.
- the secondary battery current collector 400 may include metal mesh layers 430a and 430b formed on the first and second surfaces of the base substrate 110, respectively.
- the metal mesh layer includes a plurality of metal mesh patterns 431a and 431b and holes 432a and 432b positioned between the metal mesh patterns, respectively, wherein the base substrate and the metal mesh layer It includes an adhesive layer (120a, 120b) for attaching.
- the shape of the metal mesh pattern of the secondary battery current collector according to the fourth embodiment of the present invention may be different from that of the first embodiment.
- the first metal mesh pattern 431a of the first metal mesh layer 430a includes a lower end 431a 2 and an upper end 431a 1
- the second metal mesh of the second metal mesh layer 430b includes a lower portion 431b 2 and an upper portion 431b 1 , wherein the widths of the upper portions 431a 1 and 431b 1 are larger than the widths of the lower portions 431a 2 and 431b 2 . It features.
- the width of the upper end portions 431a 1 and 431b 1 is greater than the width of the lower end portions 431a 2 and 431b 2 , thereby desorbing the active material applied onto the metal mesh layer through the holes 432a and 432b. It can prevent more efficiently.
- the secondary battery current collector according to the fourth embodiment of the present invention may have a form in which the width increases from the lower end of the metal mesh pattern to the upper end, thereby, on the metal mesh layer
- the capacity of the secondary battery can be increased by ensuring the space where the active material can be applied to the maximum while preventing the detachment of the applied active material more efficiently.
- the upper end and the lower end are based on the surface of the base substrate to which each metal mesh layer is bonded, that is, the first metal mesh pattern is based on the first surface of the base substrate.
- the second metal mesh pattern may distinguish the upper end and the lower end based on the second surface of the base substrate.
- the secondary battery current collector 500 may include metal mesh layers 530a and 530b formed on the first and second surfaces of the base substrate 110, respectively.
- the metal mesh layer includes a plurality of metal mesh patterns 531a and 531b and holes 532a and 532b positioned between the metal mesh patterns, respectively, wherein the base substrate and the metal mesh layer It includes an adhesive layer (120a, 120b) for attaching.
- the shape of the metal mesh pattern of the secondary battery current collector according to the fifth embodiment of the present invention may be different from that of the first embodiment.
- the first metal mesh pattern 531a of the first metal mesh layer 530a includes a lower end 531a 2 and an upper end 531a 1 , and the second metal mesh of the second metal mesh layer 530b.
- pattern (531b) is smaller than the width of the lower end (531b 2), and an upper end comprising a (531b 1), wherein, each of the upper end of (531a 1, 531b 1) the lower end is the width of each (531a 2, 531b 2) It features.
- the width of the upper end portions 531a 1 and 531b 1 is smaller than the width of the lower end portions 531a 2 and 531b 2 , thereby applying the active material applied onto the metal mesh layer through the holes 532a and 532b. This can be done more easily.
- the cross-sectional shape of the upper end portions 531a 1 and 531b 1 is illustrated in a semicircle shape in FIG. 22, the cross-sectional shape of the upper end portion is not limited within a range in which the upper end portion has a width smaller than that of the lower end portion. .
- the upper end and the lower end are based on the surface of the base substrate to which each metal mesh layer is bonded, that is, the first metal mesh pattern is based on the first surface of the base substrate.
- the second metal mesh pattern may distinguish the upper end and the lower end based on the second surface of the base substrate.
- FIG. 23 is a photograph showing a cross section of a metal mesh pattern of a secondary battery current collector according to a third embodiment of the present invention
- FIG. 24 is a cross section of a metal mesh pattern of a current collector for secondary batteries according to a fourth embodiment of the present invention
- 25 is a photograph showing a cross section of a metal mesh pattern of a current collector for a secondary battery according to a fifth embodiment of the present invention.
- the shape of the metal mesh patterns of the metal mesh layers 330a, 430a, and 530a may be manufactured as described with reference to FIGS. 20 to 22.
- 26 is a cross-sectional view illustrating a current collector for a secondary battery according to a sixth embodiment of the present invention.
- the current collector for the secondary battery according to the sixth embodiment may be the same as the current collector for the secondary battery according to the first embodiment, except as described below.
- the secondary battery current collector 600 includes metal mesh layers 130a and 130b formed on the first and second surfaces of the base substrate 110, respectively.
- the metal mesh layer includes a plurality of metal mesh patterns 131a and 131b and holes 132a and 132b positioned between the metal mesh patterns, respectively, and includes an adhesive layer for attaching the base substrate and the metal mesh layer. It is included.
- the current collector for a secondary battery according to the sixth embodiment of the present invention may have a different structure of the adhesive layer than in the first embodiment.
- the adhesive layer is formed on the first adhesive layers 120a and 120b and the metal mesh layers 130a and 130b respectively positioned on the first and second surfaces of the base substrate 110.
- a second adhesive layer 140a and 140b respectively positioned on the first adhesive layer, and the base substrate and the metal mesh layer may be attached to each other by attachment of the first adhesive layer 120a and 120b and the second adhesive layer 140a and 140b.
- FIG. 27 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a sixth embodiment of the present invention
- FIG. 28 is a process illustrating a method of manufacturing a current collector for a secondary battery according to a sixth embodiment of the present invention. It is a flow chart.
- the method of manufacturing the secondary battery current collector according to the sixth embodiment may be the same as the method of manufacturing the secondary battery current collector according to the first embodiment, except as will be described later.
- the method of manufacturing the secondary battery current collector according to the sixth embodiment of the present invention provides a base substrate 1011 prepared from the base substrate supply unit 1010 (S300).
- the base substrate 1011 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector. As described above, the detailed description thereof will be omitted.
- the base substrate is pretreated (S310).
- the pretreatment may be a chemical pretreatment method by dipping the base substrate in a pretreatment tank 1001 containing a pretreatment solution.
- the first washing step may be based on a method of immersing the base substrate in a first washing tank 2602 containing a washing solution.
- a first adhesive layer is formed on the base substrate (S330).
- the first adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by a method of immersing the base substrate in a plating bath 1003 including a plating liquid.
- a solder layer may be formed on the first and second surfaces of the base substrate, respectively.
- the second washing step may be by a method of immersing the base substrate in a second washing tank 1004 containing a washing solution.
- the drying step may be hot air drying performed in the hot air drying furnace 1005.
- the metal mesh layer 1021 is manufactured through the metal mesh manufacturing apparatus as described above, and a metal mesh layer is provided (S360).
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted.
- the supply portion of the metal mesh layer 1020a and 1020b may be located on the first and second surfaces of the base substrate, respectively.
- the pretreatment may be a general chemical pretreatment.
- the chemical pretreatment may be performed by immersing a target material, ie, a metal mesh layer, in an acidic or alkaline solution, such as pickling and degreasing, or spraying the solution onto the target material to provide oil on the surface of the metal material. , Contaminants, and impurities may be removed.
- the pretreatment may be a chemical pretreatment method by dipping the metal mesh layer in the pretreatment tanks 1021a and 1021b containing the pretreatment solution, but the present invention is not limited to the method of pretreatment. Accordingly, the pretreatment step can be omitted.
- the first washing step is a process for removing a pretreatment solution used in the pretreatment process, and may be by a method of immersing the metal mesh layer in the first washing baths 1022a and 1022b containing the washing solution.
- the method of washing with water in the present invention is not limited, and the first washing step may be omitted as necessary.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by immersing the metal mesh layer in plating baths 1023a and 1023b including a plating solution.
- the present invention is not limited to the method of forming the solder layer.
- the second washing step is a process for washing the plating solution used in the adhesive layer forming process, and may be by a method of immersing the metal mesh layer in the second washing tanks (1024a, 1024b) containing the washing solution.
- the method of washing with water in the present invention is not limited, and if necessary, the second washing step may be omitted.
- the drying step may be hot air drying performed in the hot air drying furnaces 1025a and 1025b, but the present invention is not limited to the drying method, and the drying process may be omitted if necessary.
- the base substrate including the first adhesive layer and the metal mesh layer including the second adhesive layer is disposed, the second adhesive layer is positioned on the first adhesive layer, and pressed by the pressing rollers 1030a and 1030b. (S370).
- the constant temperature may be 150 ⁇ 500 °C.
- a current collector for a battery including the metal mesh layer according to the sixth embodiment of the present invention can be manufactured.
- the adhesive layer is a first adhesive layer and the first and second surfaces respectively located on the base substrate and the And a second adhesive layer on each of the metal mesh layers, and the base substrate and the metal mesh layer may be attached to each other by attaching the first adhesive layer and the second adhesive layer.
- the metal mesh layer may be located on only one of the first and second surfaces of the base substrate, similarly to the first embodiment. have.
- FIG. 29 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a modification of the sixth embodiment of the present invention
- FIG. 30 is a method of manufacturing a current collector for a secondary battery according to a modification of the sixth embodiment of the present invention. It is a process flowchart showing the following. However, the method of manufacturing the secondary battery current collector according to the modification of the sixth embodiment of the present invention may be the same as the method of manufacturing the sixth embodiment described above.
- a method of manufacturing a secondary battery current collector according to a modification of the sixth exemplary embodiment of the present invention provides a base substrate 1111 prepared from the base substrate supply unit 1110 (S400).
- the base substrate is pretreated (S410).
- the pretreatment may be a chemical pretreatment method by dipping the base substrate in a pretreatment bath 1101 containing a pretreatment solution.
- the first washing step may be based on a method of immersing the base substrate in a first washing bath 1102 containing a washing solution.
- a first adhesive layer is formed on the base substrate (S430).
- the first adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by a method of immersing the base substrate in a plating bath 1103 including a plating solution.
- a solder layer may be formed on the first and second surfaces of the base substrate, respectively.
- the second washing step may be based on a method of immersing the base substrate in a second washing tank 1104 containing a washing solution.
- the drying step may be hot air drying performed in the hot air drying furnace 1105.
- the metal mesh layer 1121 including the protective film is manufactured through the metal mesh manufacturing apparatus as described above, and a metal mesh layer including the protective film is provided (S460). ).
- the electrodeposition layer peeling step of manufacturing a metal mesh layer by applying an adhesive to the protective film, it is laminated on top of the metal mesh layer formed on the mesh of the surface of the mesh-type cathode drum, the protection The film and the metal mesh layer can be peeled off simultaneously.
- the metal mesh washed through the electrodeposition layer washing step is separated for easy handling. It can also be attached to a protective film.
- the manufacturing method of the current collector for secondary batteries which concerns on the modified example of 6th Example of this invention corresponds to using the metal mesh layer containing such a protective film.
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted. Let's do it.
- the metal mesh layer to supply the metal mesh layer to the first and second surfaces of the base substrate may be positioned on the first and second surfaces of the base substrate, respectively.
- the pretreatment may be a chemical pretreatment method by dipping the metal mesh layer in the pretreatment tanks 1121a and 1121b containing the pretreatment solution.
- the first washing step may be a method of immersing the metal mesh layer in the first washing tanks 1122a and 1122b containing the washing solution.
- the second adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by a method of immersing the metal mesh layer in plating baths 1123a and 1123b including a plating solution. Can be.
- the second washing step may be by a method of immersing the metal mesh layer in the second washing tank (1124a, 1124b) in which the washing solution is contained, but is not limited to the washing method in the present invention, it is necessary Accordingly, the second washing step can be omitted.
- the drying step may be hot air drying performed in the hot air drying furnaces 1125a and 1125b, but the present invention is not limited to the drying method, and the drying process may be omitted as necessary.
- the base substrate including the first adhesive layer and the metal mesh layer including the second adhesive layer is disposed, the second adhesive layer is positioned on the first adhesive layer, and pressed by the pressing rollers (1130a, 1130b) (S470).
- the constant temperature may be 150 ⁇ 500 °C.
- the current collector 1113 for the secondary battery that proceeded to step S470 because the metal mesh layer includes a protective film, the protective film is included on the opposite surface of the adhesive layer and the non-bonded metal mesh layer.
- the protective film is removed from the metal mesh layer at the end of use (S480).
- a battery current collector including a metal mesh layer according to a modification of the sixth embodiment of the present invention can be manufactured.
- the metal mesh layer is located only on any one of the first and second surfaces of the base substrate, similarly to the first embodiment described above. can do.
- FIG. 31 is a cross-sectional view illustrating a current collector for a secondary battery according to a seventh embodiment of the present invention
- FIG. 32 is a cross-sectional view illustrating a current collector for a secondary battery according to an eighth embodiment of the present invention.
- the secondary battery current collector 3100 includes a base substrate 3110.
- the base substrate 3110 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector.
- the secondary battery current collector 3100 includes a first metal mesh layer 3130a and the base positioned on the first surface of the base substrate 3110.
- the second metal mesh layer 3130b is disposed on the second surface of the substrate 3110.
- the metal mesh layers 3130a and 3130b may be formed of at least one of copper (Cu), silver (Ag), chromium (Cr), nickel (Ni), iron (Fe), cobalt (Co), and alloys thereof. Although it may be made, the present invention is not limited to the material of the metal mesh layer.
- the first metal mesh layer 3130a includes a first hole 3132a positioned between the plurality of first metal mesh patterns 3131a
- the second metal mesh layer 3130b includes a plurality of first metal mesh layers 3130a.
- the second hole 3132b is disposed between the two metal mesh patterns 3131b.
- the secondary battery current collector 3100 according to the seventh embodiment of the present invention is positioned between the first surface of the base substrate 3110 and the first metal mesh layer 3130a.
- the first adhesive layer 3120a and the second adhesive layer 3120b are disposed between the second surface of the base substrate 3110 and the second metal mesh layer 3130b.
- the first adhesive layer is positioned between the first surface of the base substrate 3110 and the first metal mesh pattern 3131a, and the second adhesive layer is formed on the second surface of the base substrate 3110. Located between the second metal mesh pattern 3131b.
- the first adhesive layer 3120a and the second adhesive layer 3120b are for attaching the metal mesh layer on the base substrate 110, and the first adhesive layer and the second adhesive layer may be solder layers, wherein the solder layer It may be made of silver lead (Pb), tin (Sn), zinc (Zn), indium (In), cadmium (Cd), bismuth (Bi), or an alloy thereof.
- solder layer It may be made of silver lead (Pb), tin (Sn), zinc (Zn), indium (In), cadmium (Cd), bismuth (Bi), or an alloy thereof.
- the secondary battery current collector 3100 includes metal mesh layers 3130a and 3130b formed on the first and second surfaces of the base substrate 3110, respectively.
- the mesh layer includes a plurality of metal mesh patterns 3131a and 3131b and holes 3132a and 3132b respectively positioned between the metal mesh patterns 3131a and 3131b, wherein the base substrate and the metal mesh layer Adhesive layers 3120a and 3120b for attaching the same.
- the current collector is coated with the active material, more specifically, a metal mesh layer is attached to the base substrate through an adhesive layer, and the metal mesh layer includes holes 3132a and 3132b positioned between the metal mesh patterns. Therefore, an active material is applied onto the metal mesh layer through the holes 3132a and 3132b, thereby increasing the contact area between the metal mesh layer and the active material, thereby suppressing detachment of the active material from the current collector, Cycle life characteristics can be improved.
- the active material is applied on the metal mesh layer, in this case, the active material is also applied to the base substrate through a hole located between the metal mesh pattern.
- the secondary battery current collector 3200 includes a base substrate 3210 and a metal mesh layer 3230 positioned on the base substrate 3210.
- the metal mesh layer 3230 may include a plurality of metal mesh patterns 3231 and holes 3322 disposed between the metal mesh patterns 3321.
- the secondary battery current collector 3200 includes an adhesive layer 3220 disposed between the base substrate 3210 and the metal mesh pattern 3321.
- the positive electrode may apply the positive electrode active material to one side or both sides of the positive electrode current collector.
- the secondary battery current collector 3200 is an embodiment in which the metal mesh layer 3230 is formed only on one surface of the base substrate 3210.
- the metal mesh layer may be formed. It can be formed in the 1st surface and / or 2nd surface of a base base material.
- the current collector for the secondary battery according to the eighth embodiment may be the same as the current collector for the secondary battery according to the seventh embodiment except as described above, a detailed description thereof will be omitted.
- 33 to 36 are cross-sectional views illustrating a method of manufacturing a current collector for a secondary battery according to a seventh embodiment of the present invention.
- the metal mesh layer 3130 is manufactured through the metal mesh manufacturing apparatus as described above.
- the metal mesh layer can also be produced by weaving or machining method, and thus, the metal mesh layer in the present invention It does not limit the method of manufacturing the.
- the width d1 of the metal mesh layer 3130 may be 1 to 500 ⁇ m
- the thickness d2 of the metal mesh layer may be 1 to 500 ⁇ m
- the interval between the metal mesh pattern and the metal mesh pattern may also be used. That is, the size of the holes 3132 located between the metal mesh patterns 3131 may be 1 ⁇ m to 3 mm, but the present invention is not limited thereto.
- an adhesive layer 3120 is formed on one surface of the metal mesh layer 3130.
- the adhesive layer 3120 may be a solder layer, and the solder layer may be formed through a known electroplating method or an electroless plating method, but the method of forming the solder layer is not limited in the present invention.
- the thickness (d3) of the adhesive layer may be 1 ⁇ 20 ⁇ m, but is not limited to these numerical values in the present invention.
- a base substrate 3110 is prepared.
- the thickness d4 of the base substrate 3110 may be 1 to 100 ⁇ m, but the present invention is not limited thereto.
- a metal mesh layer having an adhesive layer formed on one surface thereof is positioned on the base substrate, and then the metal mesh layer is pressed onto the base substrate through a pressing roller.
- the first metal mesh layer 3130a having the first adhesive layer 3120a formed on one surface thereof is positioned on the first surface of the base substrate, and the second metal mesh layer having the second adhesive layer 3120b formed on one surface thereof ( 3130b) is placed on the second surface of the base substrate, and then the metal mesh layer is pressed through a pressing roller to form a first metal mesh layer on the first surface of the base substrate.
- the second metal mesh layer may be formed on two surfaces.
- the constant temperature may be 150 ⁇ 500 °C have.
- a battery current collector including the metal mesh layer according to the present invention can be manufactured,
- the secondary battery current collector 3100 is a metal mesh layer 3130a, respectively formed on the first and second surfaces of the base substrate 3110, 3130b), wherein the metal mesh layer includes a plurality of metal mesh patterns 3131a and 3131b and holes 3132a and 3132b positioned between the metal mesh patterns, respectively, wherein the base substrate and the metal mesh Adhesive layers 3120a and 3120b for attaching the layers are included.
- FIG. 37 is a schematic structural diagram for manufacturing a current collector for a secondary battery according to a seventh embodiment of the present invention
- FIG. 38 is a process illustrating a method of manufacturing a current collector for a secondary battery according to a seventh embodiment of the present invention
- 39 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to an eighth embodiment of the present invention.
- the method of manufacturing the current collector for a secondary battery according to the eighth embodiment of the present invention may be the same as the method of manufacturing the seventh embodiment described above, except as will be described later. Reference is made.
- the metal mesh layer 4021 is manufactured through the metal mesh manufacturing apparatus as described above.
- a metal mesh layer is provided (S4100).
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted.
- the supply portion of the metal mesh layer 4020a and 4020b may be located on the first and second surfaces of the base substrate, respectively.
- the metal mesh layer first supply part 4020a for providing the first metal mesh layer on the first surface of the base substrate
- the metal mesh layer second supply part for providing the second metal mesh layer on the second surface of the base substrate.
- the metal mesh layer is referred to as a metal mesh layer. do.
- the metal mesh layer is pretreated (S4110).
- the pretreatment may be a general chemical pretreatment.
- the chemical pretreatment may be performed by immersing a target material, ie, a metal mesh layer, in an acidic or alkaline solution, such as pickling and degreasing, or spraying the solution onto the target material to provide oil on the surface of the metal material. , Contaminants, and impurities may be removed.
- the pretreatment may be a chemical pretreatment method by dipping the metal mesh layer in the pretreatment tanks 4021a and 4021b containing the pretreatment solution, but the present invention is not limited to the method of pretreatment. Accordingly, the pretreatment step can be omitted.
- the first washing step is a process for removing a pretreatment solution used in the pretreatment process, and may be by a method of immersing the metal mesh layer in the first washing tanks 4022a and 4022b in which the washing solution is accommodated.
- the method of washing with water in the present invention is not limited, and the first washing step may be omitted as necessary.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by immersing the metal mesh layer in plating baths 4023a and 4023b including a plating solution.
- the present invention is not limited to the method of forming the solder layer.
- a first adhesive layer may be formed on the first metal mesh layer, and a second adhesive layer may be formed on the second metal mesh layer.
- the adhesive layer when forming the adhesive layer by the method of immersing the metal mesh layer in the plating bath (4023a, 4023b) of step S4130 shown in Figure 37, that is, both sides of the first metal mesh layer, that is, the first surface and the second An adhesive layer may be formed on a surface thereof, and an adhesive layer may be formed on both surfaces of the second metal mesh layer, that is, the first surface and the second surface.
- the adhesive layer may be formed on both sides of the metal mesh layer, but in the present invention, since the adhesive layer is sufficient to be formed on at least one side, the following description will be based on the fact that the adhesive layer is formed only on one side of both sides. Shall be.
- the adhesive layer can be selectively formed only on one surface by a known printing method, vapor deposition method, or the like.
- the second washing step is a process for washing the plating solution used in the adhesive layer forming process, and may be by a method of immersing the metal mesh layer in the second washing tanks 4024a and 4024b containing the washing solution.
- the method of washing with water in the present invention is not limited, and if necessary, the second washing step may be omitted.
- the drying step may be hot air drying performed in the hot air drying furnaces 4025a and 4025b, but the present invention is not limited to the drying method, and the drying process may be omitted if necessary.
- the base substrate 4011 prepared from the base substrate supply unit 4010 is provided (S4160).
- the base substrate 4011 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector. As described above, the detailed description thereof will be omitted.
- the supply portion 4020a, 4020b in order to supply the metal mesh layer to the first surface and the second surface of the base substrate, the supply portion 4020a, 4020b) may be located on the first side and the second side of the base substrate, respectively.
- a second metal mesh layer including 4040b, thereby providing a first metal mesh layer including a first adhesive layer on a first surface of the base substrate, and including a second adhesive layer on a second surface of the base substrate. Can be provided.
- the metal mesh layer 4022 including the adhesive layer is positioned on the base substrate and pressed by the pressing rollers 4130a and 4130b (S4170).
- a first metal mesh layer including a first adhesive layer is disposed on a first surface of a base substrate, and a second adhesive layer is provided on a second surface of the base substrate. After positioning the second metal mesh layer, the first metal mesh layer and the second metal mesh layer are formed on the first surface and the second surface of the base substrate through the pressing roller, respectively, through the first adhesive layer and the second adhesive layer, respectively. It can be crimped respectively.
- the constant temperature is 150 ⁇ 500 °C days Can be.
- a battery current collector including the metal mesh layer according to the seventh embodiment of the present invention can be manufactured.
- the secondary battery current collector 4031 includes a metal mesh layer formed on the first and second surfaces of the base substrate, respectively,
- Each of the mesh layers includes a plurality of metal mesh patterns and holes located between the metal mesh patterns, and the mesh layer includes an adhesive layer for attaching the base substrate and the metal mesh layer.
- the metal mesh layer 5021 is manufactured through the metal mesh manufacturing apparatus, and the metal mesh is manufactured. Provide a layer.
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted.
- the metal mesh layer may be one of the first and second surfaces of the base substrate, for example, In order to supply to the first surface, the supply portion 5020a of the metal mesh layer may be located only on the first surface of the base substrate.
- a metal mesh layer supply unit 5020a for providing a metal mesh layer on the first surface of the base substrate.
- the positive electrode may apply the positive electrode active material to one side or both sides of the positive electrode current collector.
- the method of manufacturing a secondary battery current collector according to an eighth embodiment of the present invention is an embodiment in which a metal mesh layer is formed only on one surface of a base substrate. Therefore, in the present invention, the metal mesh layer is formed on the first surface of the base substrate. And / or on the second surface.
- the metal mesh layer is pretreated.
- the pretreatment may be a chemical pretreatment method by immersing the metal mesh layer in a pretreatment tank 2021a containing a pretreatment solution.
- the first washing step may be based on a method of immersing the metal mesh layer in a first washing bath 5022a containing a washing solution.
- an adhesive layer is formed on the metal mesh layer.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by immersing the metal mesh layer in a plating bath 5023a including a plating solution.
- the second washing step may be a method of immersing the metal mesh layer in a second washing tank 5024a in which a washing solution is accommodated.
- the drying step may be hot air drying performed in the hot air drying furnace 5025a.
- the base substrate 5011 prepared from the base substrate supply part 5010 is provided.
- the base substrate 5011 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector. As described above, the detailed description thereof will be omitted.
- the supply portion 5020a of the metal mesh layer is formed of the base substrate. It may be located only on the first side.
- the metal mesh layer 5022 including the adhesive layer is placed on the base substrate and pressed by the pressing rollers 5130a and 5130b.
- a metal mesh layer including an adhesive layer is positioned on a first surface of a base substrate, and then the metal mesh layer is attached to the base substrate through a pressing roller. It can be pressed on the first surface of the.
- the constant temperature may be 150 ⁇ 500 °C.
- a battery current collector including the metal mesh layer according to the eighth embodiment of the present invention can be manufactured.
- the secondary battery current collector 5031 includes a metal mesh layer formed on the first surface of the base substrate, the metal mesh layer is a plurality of A hole is disposed between the metal mesh pattern and the metal mesh pattern.
- the base layer may include an adhesive layer for attaching the base substrate and the metal mesh layer.
- FIG. 40 is a schematic configuration diagram for manufacturing a secondary battery current collector according to a modification of the seventh embodiment of the present invention
- FIG. 41 is a method of manufacturing a current collector for secondary batteries according to a modification of the seventeenth embodiment of the present invention
- 42 is a schematic configuration diagram for manufacturing a current collector for a secondary battery according to a modification of the eighth embodiment of the present invention.
- the method of manufacturing the secondary battery current collector according to the modification of the seventh embodiment of the present invention may be the same as the method of manufacturing the above-described seventh embodiment.
- the method of manufacturing the current collector for a secondary battery according to the modification of the eighth embodiment of the present invention may be the same as the method of manufacturing the modification of the seventh embodiment described above, except as will be described later. Reference will be made to FIG. 41.
- a method of manufacturing a current collector for a secondary battery according to a modification of the seventh embodiment of the present invention includes a metal mesh layer including a protective film through the metal mesh manufacturing apparatus as described above. 6111 to prepare a metal mesh layer including a protective film (S6200).
- the electrodeposition layer peeling step of manufacturing a metal mesh layer by applying an adhesive to the protective film, it is laminated on top of the metal mesh layer formed on the mesh of the surface of the mesh-type cathode drum, the protection The film and the metal mesh layer can be peeled off simultaneously.
- the metal mesh washed through the electrodeposition layer washing step is separated for easy handling. It can also be attached to a protective film.
- the manufacturing method of the current collector for secondary batteries which concerns on the modified example of 7th Example of this invention corresponds to using the metal mesh layer containing such a protective film.
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, and as described above, a detailed description thereof will be omitted.
- the metal mesh layer to supply the metal mesh layer to the first and second surfaces of the base substrate may be positioned on the first and second surfaces of the base substrate, respectively.
- the metal mesh layer first supply part 6120a for providing the first metal mesh layer on the first surface of the base substrate and the metal mesh layer second supply part for providing the second metal mesh layer on the second surface of the base substrate 6120b.
- the metal mesh layer is referred to as a metal mesh layer. do.
- the metal mesh layer is pretreated (S6210).
- the pretreatment may be a chemical pretreatment method by immersing the metal mesh layer in the pretreatment tanks 6121a and 6121b containing the pretreatment solution.
- the first washing step may be a method of immersing the metal mesh layer in the first washing bath (6122a, 6122b) in which the washing solution is accommodated.
- the adhesive layer may be a solder layer, and the solder layer may be formed by a known electroplating method or an electroless plating method by immersing the metal mesh layer in plating baths 6223a and 6123b including a plating solution. .
- a first adhesive layer may be formed on the first metal mesh layer, and a second adhesive layer may be formed on the second metal mesh layer.
- the second washing step may be a method of immersing the metal mesh layer in the second washing tank (6124a, 6124b) in which the washing solution is accommodated.
- the drying step may be hot air drying proceeded in the hot air drying furnace (6125a, 6125b).
- the base substrate 6111 prepared from the base substrate supply part 6110 is provided (S6260).
- the base substrate 6111 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector. As described above, the detailed description thereof will be omitted.
- the supply portion of the metal mesh layer ( 6120a and 6120b may be located on the first and second surfaces of the base substrate, respectively.
- the first metal mesh layer including the first adhesive layer may be provided on the first surface of the base substrate, and the second metal mesh layer including the second adhesive layer may be provided on the second surface of the base substrate.
- the metal mesh layer 6122 including the adhesive layer is positioned on the base substrate and pressed by the pressing rollers 6130a and 6130b (S6270).
- an adhesive layer positioned on the opposite surface on which the protective film is positioned is placed on the base substrate.
- a first metal mesh layer including a first adhesive layer is disposed on a first surface of a base substrate, and a second adhesive layer is included on a second surface of the base substrate. After positioning the second metal mesh layer, the first metal mesh layer and the second metal mesh layer through the pressing roller, respectively through the first adhesive layer and the second adhesive layer, the first surface and the second surface of the base substrate Each surface can be pressed.
- the constant temperature is 150 ⁇ 500 °C days Can be.
- the secondary battery current collector 6131 which has been performed up to step S6270, includes a protective film on the opposite side of the base mesh and the non-bonded metal mesh layer.
- the protective film is removed from the metal mesh layer at the end of use (S6280).
- the modification of the seventh embodiment is because the protective film is included on the upper portion of the metal mesh layer, more specifically, the upper surface of the opposite side of the metal mesh layer not adhered to the base substrate.
- the protection characteristics and storage characteristics of the current collector for secondary batteries may be easy.
- a battery current collector including a metal mesh layer according to a modification of the seventh exemplary embodiment of the present invention can be manufactured.
- a metal mesh layer 7121 including a protective film is manufactured to a metal including a protective film. Provide a mesh layer.
- the metal mesh layer may include a hole between the metal mesh pattern and the metal mesh pattern, as described above, and thus, a detailed description thereof will be omitted.
- the metal mesh layer is any one of the first surface and the second surface of the base substrate, for example
- the supply portion 7120a of the metal mesh layer may be located only on the first surface of the base substrate.
- it includes a metal mesh layer supply unit 7120a for providing a metal mesh layer on the first surface of the base substrate.
- the positive electrode may apply the positive electrode active material to one side or both sides of the positive electrode current collector.
- the method of manufacturing the secondary battery current collector according to the modification of the eighth embodiment of the present invention is an embodiment in which the metal mesh layer is formed only on one surface of the base substrate. Accordingly, in the present invention, the metal mesh layer is formed of the base substrate. It may be formed on one side and / or the second side.
- the metal mesh layer is pretreated.
- the pretreatment may be a chemical pretreatment method by immersing the metal mesh layer in a pretreatment bath 7121a containing a pretreatment solution.
- the first washing step may be a method of immersing the metal mesh layer in a first washing bath (7122a) in which a washing solution is accommodated.
- an adhesive layer is formed on the metal mesh layer.
- the adhesive layer may be a solder layer, and the solder layer may be formed through a known electroplating method or an electroless plating method by a method of immersing the metal mesh layer in a plating bath 7123a including a plating solution.
- the second washing step may be by a method of immersing the metal mesh layer in the second washing bath (7124a) in which the washing solution is accommodated.
- the drying step may be hot air drying performed in the hot air drying furnace 7125a.
- a base substrate 7111 prepared from the base substrate supply part 7110 is provided.
- the base substrate 7111 may vary depending on whether the current collector is a positive electrode current collector or a negative electrode current collector. As described above, the detailed description thereof will be omitted.
- the supply portion 7120a of the metal mesh layer is a base. It may be located only on the first side of the substrate.
- the metal mesh layer 7122 including the adhesive layer is placed on the base substrate and pressed by the rollers 7130a and 7130b.
- the metal mesh layer including the adhesive layer is positioned on the first surface of the base substrate, and then the metal mesh layer is attached to the metal mesh layer through the adhesive layer. It can be pressed onto the first surface of the base substrate.
- the constant temperature may be 150 ⁇ 500 °C.
- the metal mesh layer includes a protective film in the current collector 7131 for the secondary battery, the protective film is included on the opposite side of the base mesh and the non-bonded metal mesh layer. have.
- the protective film is removed from the metal mesh layer at the end of use.
- the modification of the eighth embodiment is because the protective film is included in the upper portion of the metal mesh layer, more specifically, the upper surface of the opposite side of the metal mesh layer that is not bonded to the base substrate The protection characteristics and storage characteristics of the current collector for secondary batteries may be easy.
- a battery current collector including a metal mesh layer according to a modification of the eighth embodiment of the present invention can be manufactured.
- the shape of the metal mesh pattern may be changed.
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Abstract
Description
Claims (23)
- 베이스 기재;상기 베이스 기재 상에 위치하는 접착층; 및상기 접착층 상에 위치하는 금속메쉬층을 포함하며,상기 금속메쉬층은 복수의 금속메쉬 패턴 및 상기 금속메쉬 패턴의 사이에 위치하는 홀을 포함하는 전지용 집전체.
- 제 1 항에 있어서,상기 접착층은 솔더층이고, 상기 솔더층은 납(Pb), 주석(Sn), 아연(Zn), 인듐(In), 카드늄(Cd), 비스무스(Bi), 또는 이들의 합금으로 이루어지는 것을 특징으로 하는 전지용 집전체.
- 제 1 항에 있어서,상기 접착층은 제1접착층 및 제2접착층을 포함하고, 상기 금속메쉬층은 제1금속메쉬층 및 제2금속메쉬층을 포함하며,상기 제1접착층은 상기 베이스 기재의 제1면에 위치하고, 상기 제2접착층은 상기 베이스 기재의 제2면에 위치하며,상기 제1금속메쉬층은 상기 제1접착층 상에 위치하고, 상기 제2금속메쉬층은 상기 제2접착층 상에 위치하는 전지용 집전체.
- 제 1 항에 있어서,상기 금속메쉬 패턴의 사이에 위치하는 상기 홀을 통해 상기 접착층에 활물질이 도포되는 전지용 집전체.
- 제 1 항에 있어서,상기 금속메쉬 패턴은 하단부 및 상단부를 포함하고,상기 상단부의 폭은 상기 하단부의 폭보다 큰 것을 특징으로 하는 전지용 집전체.
- 제 1 항에 있어서,상기 금속메쉬 패턴은 하단부 및 상단부를 포함하고,상기 하단부에서 상기 상단부로 갈수록 상기 금속메쉬 패턴의 폭이 증가하는 것을 특징으로 하는 전지용 집전체.
- 베이스 기재;상기 베이스 기재의 제1면 및 제2면에 각각 형성되고, 복수의 금속메쉬 패턴 및 상기 금속메쉬 패턴의 사이에 위치하는 홀을 포함하는 금속메쉬층; 및상기 베이스 기재와 금속메쉬층을 부착하기 위한 접착층을 포함하고,상기 접착층은 상기 베이스 기재의 제1면 및 제2면에 각각 위치하는 제1접착층 및 상기 금속메쉬층 상에 각각 위치하는 제2접착층을 포함하며, 상기 제1접착층과 상기 제2접착층이 부착되는 전지용 집전체.
- 베이스 기재를 제공하는 단계;복수의 금속메쉬 패턴 및 상기 금속메쉬 패턴의 사이에 위치하는 홀을 포함하는 금속메쉬층을 제공하는 단계;상기 베이스 기재 상에 접착층을 형성하는 단계; 및상기 접착층 상에 금속메쉬층을 위치시키고, 압착하는 단계를 포함하는 전지용 집전체의 제조방법.
- 제 8 항에 있어서,상기 베이스 기재 상에 접착층을 형성하는 단계는, 상기 베이스 기재의 제1면에 제1접착층을 형성하는 단계 및 상기 베이스 기재의 제2면에 제2접착층을 형성하는 단계를 포함하고,상기 금속메쉬층을 제공하는 단계는, 제1금속메쉬층을 제공하는 단계 및 제2금속메쉬층을 제공하는 단계를 포함하며,상기 제1금속메쉬층은 상기 제1접착층 상에 위치하고, 상기 제2금속메쉬층은 상기 제2접착층 상에 위치하는 전지용 집전체의 제조방법.
- 제 8 항에 있어서,상기 금속메쉬층을 제공하는 단계는,제조하고자 하는 금속메쉬층의 형상과 대응되는 형상의 메쉬를 포함하는 전주마스터를 제공하는 단계;전해액에 녹아있는 구리(Cu), 은(Ag), 크롬(Cr), 니켈(Ni), 철(Fe), 코발트(Co) 및 이들의 합금 중 적어도 어느 하나의 물질을 상기 메쉬의 상면에 전착시켜 금속메쉬를 전착하는 전착단계;상기 금속메쉬를 상기 메쉬로부터 박리하는 전착층 박리단계; 및상기 박리된 전착층을 수세하는 전착층수세단계를 포함하는 전지용 집전체의 제조방법.
- 제 10 항에 있어서,상기 금속메쉬층을 제공하는 단계는 보호필름을 포함하는 금속메쉬층을 제공하는 단계이고,상기 접착층 상에 금속메쉬층을 위치시키고, 압착하는 단계이후, 상기 금속메쉬층으로부터 상기 보호필름을 제거하는 단계를 더 포함하는 전지용 집전체의 제조방법.
- 베이스 기재를 제공하는 단계;복수의 금속메쉬 패턴 및 상기 금속메쉬 패턴의 사이에 위치하는 홀을 포함하는 금속메쉬층을 제공하는 단계;상기 베이스 기재 상에 제1접착층을 형성하는 단계;상기 금속메쉬층 상에 제2접착층을 형성하는 단계; 및상기 제1접착층을 포함하는 베이스 기재와 상기 제2접착층을 포함하는 금속메쉬층을 배치하되, 상기 제1접착층 상에 상기 제2접착층을 위치시키고, 압착하는 단계를 포함하는 전지용 집전체의 제조방법.
- 베이스 기재;상기 베이스 기재에 위치하는 금속메쉬층; 및상기 베이스 기재와 상기 금속메쉬층 사이에 위치하는 접착층을 포함하며,상기 금속메쉬층은 복수의 금속메쉬 패턴 및 상기 금속메쉬 패턴의 사이에 위치하는 홀을 포함하는 전지용 집전체.
- 제 13 항에 있어서,상기 접착층은 솔더층이고, 상기 솔더층은 납(Pb), 주석(Sn), 아연(Zn), 인듐(In), 카드늄(Cd), 비스무스(Bi), 또는 이들의 합금으로 이루어지는 것을 특징으로 하는 전지용 집전체.
- 제 13 항에 있어서,상기 접착층은 제1접착층 및 제2접착층을 포함하고, 상기 금속메쉬층은 제1금속메쉬층 및 제2금속메쉬층을 포함하며,상기 제1접착층은 상기 베이스 기재의 제1면과 상기 제1금속메쉬층의 사이에 위치하고, 상기 제2접착층은 상기 베이스 기재의 제2면과 상기 제2금속메쉬층의 사이에 위치하는 전지용 집전체.
- 제 13 항에 있어서,상기 접착층은 제1접착층 및 제2접착층을 포함하고, 상기 금속메쉬층은 제1금속메쉬층 및 제2금속메쉬층을 포함하며,상기 제1금속메쉬층은 복수의 제1금속메쉬 패턴을 포함하고, 상기 제2금속메쉬층은 복수의 제2금속메쉬 패턴을 포함하며,상기 제1접착층은 상기 베이스 기재의 제1면과 상기 제1금속메쉬 패턴의 사이에 위치하고, 상기 제2접착층은 상기 베이스 기재의 제2면과 상기 제2금속메쉬 패턴의 사이에 위치하는 전지용 집전체.
- 제 13 항에 있어서,상기 금속메쉬 패턴의 사이에 위치하는 상기 홀을 통해 상기 베이스 기재에 활물질이 도포되는 전지용 집전체.
- 제 13 항에 있어서,상기 금속메쉬 패턴은 하단부 및 상단부를 포함하고,상기 상단부의 폭은 상기 하단부의 폭보다 큰 것을 특징으로 하는 전지용 집전체.
- 제 13 항에 있어서,상기 금속메쉬 패턴은 하단부 및 상단부를 포함하고,상기 하단부에서 상기 상단부로 갈수록 상기 금속메쉬 패턴의 폭이 증가하는 것을 특징으로 하는 전지용 집전체.
- 베이스 기재를 제공하는 단계;복수의 금속메쉬 패턴 및 상기 금속메쉬 패턴의 사이에 위치하는 홀을 포함하는 금속메쉬층을 제공하는 단계;상기 금속메쉬층 상에 접착층을 형성하는 단계; 및상기 베이스 기재 상에 상기 접착층을 위치시키고, 압착하는 단계를 포함하는 전지용 집전체의 제조방법.
- 제 20 항에 있어서,상기 금속메쉬층은 제1금속메쉬층 및 제2금속메쉬층을 포함하고,상기 금속메쉬층 상에 접착층을 형성하는 단계는, 상기 제1금속메쉬층 상에 제1접착층을 형성하는 단계 및 상기 제2금속메쉬층 상에 제2접착층을 형성하는 단계를 포함하고,상기 제1접착층은 상기 베이스 기재의 제1면 상에 위치하고, 상기 제2접착층은 상기 베이스 기재의 제2면 상에 위치하는 전지용 집전체의 제조방법.
- 제 20 항에 있어서,상기 금속메쉬층을 제공하는 단계는,제조하고자 하는 금속메쉬층의 형상과 대응되는 형상의 메쉬를 포함하는 전주마스터를 제공하는 단계;전해액에 녹아있는 구리(Cu), 은(Ag), 크롬(Cr), 니켈(Ni), 철(Fe), 코발트(Co) 및 이들의 합금 중 적어도 어느 하나의 물질을 상기 메쉬의 상면에 전착시켜 금속메쉬를 전착하는 전착단계;상기 금속메쉬를 상기 메쉬로부터 박리하는 전착층 박리단계; 및상기 박리된 전착층을 수세하는 전착층수세단계를 포함하는 전지용 집전체의 제조방법.
- 제 22 항에 있어서,상기 금속메쉬층을 제공하는 단계는 보호필름을 포함하는 금속메쉬층을 제공하는 단계이고,상기 접착층 상에 금속메쉬층을 위치시키고, 압착하는 단계이후, 상기 금속메쉬층으로부터 상기 보호필름을 제거하는 단계를 더 포함하는 전지용 집전체의 제조방법.
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US14/399,749 US10276873B2 (en) | 2012-05-09 | 2013-04-22 | Current collector for battery comprising metal mesh layer and manufacturing method therefor |
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- 2013-04-22 JP JP2015511348A patent/JP6022678B2/ja active Active
- 2013-04-22 US US14/399,749 patent/US10276873B2/en active Active
- 2013-04-22 EP EP13787354.3A patent/EP2849269A4/en not_active Withdrawn
- 2013-04-22 WO PCT/KR2013/003371 patent/WO2013168910A1/ko active Application Filing
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Also Published As
Publication number | Publication date |
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JP6022678B2 (ja) | 2016-11-09 |
EP2849269A1 (en) | 2015-03-18 |
EP2849269A4 (en) | 2016-03-30 |
US10276873B2 (en) | 2019-04-30 |
US20150125756A1 (en) | 2015-05-07 |
JP2015521345A (ja) | 2015-07-27 |
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