WO2023068779A1 - 롤형 전극체 - Google Patents
롤형 전극체 Download PDFInfo
- Publication number
- WO2023068779A1 WO2023068779A1 PCT/KR2022/015903 KR2022015903W WO2023068779A1 WO 2023068779 A1 WO2023068779 A1 WO 2023068779A1 KR 2022015903 W KR2022015903 W KR 2022015903W WO 2023068779 A1 WO2023068779 A1 WO 2023068779A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- roll
- polymer film
- sheet
- adhesive tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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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
- H01M10/04—Construction or manufacture in general
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/595—Tapes
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- This application relates to a roll-type electrode body, a manufacturing method thereof, and a process using the same.
- the application area of energy storage technology is expanding to mobile devices, camcorders, laptops, etc. as well as automobiles, and one of the research fields of such energy storage technology is a rechargeable battery capable of charging and discharging.
- An electrode assembly applied to a secondary battery basically includes a structure in which a positive electrode and a negative electrode having a laminated structure of a current collector and an active material layer are laminated with a separator interposed therebetween.
- a manufacturing process of such a secondary battery may proceed while unwinding an electrode wound in a roll shape.
- FIG. 1 shows a process of manufacturing a roll-type electrode applied to the above process.
- the electrode 100 is wound in a roll shape, and a certain portion 1001 of the electrode is fixed with an adhesive or adhesive tape 200 to maintain the rolled shape.
- an additional double-sided tape 300 is attached, which is attached for the purpose of connection with other rolls during the process.
- FIG. 2 a form in which the roll-shaped electrode body as shown in FIG. 1 is unwound and connected to another element 400 through a double-sided tape 300 is shown in FIG. 2 . are listed.
- FIG. 2 when the roll-type electrode assembly of FIG. 1 is unwound, traces 2001 of the tape 200 attached to fix the roll form remain. Since the portion with marks 2001 cannot be used, the portion of the section indicated by the dotted line arrow in FIG. 2 is discarded (discard section D), and therefore, a portion that is wound at least once is lost.
- This application relates to a roll-type electrode body, a method for manufacturing the same, and a process using the roll-type electrode body (method for manufacturing a secondary battery).
- An object of the present application is to provide a roll-type electrode body that can reduce losses generated in existing processes and contribute to yield and productivity improvement, a method for manufacturing the same, and a method for manufacturing a secondary battery using the same.
- This application relates to a roll-type electrode body.
- the roll-shaped electrode body includes an electrode wound in a roll shape; And it may include a polymer film or sheet that winds the outside of the electrode wound in the form of a roll.
- the electrode may include a current collector and an electrode active material layer formed on at least one surface of the current collector.
- the roll-type electrode body may further include a double-sided adhesive or adhesive tape attaching the electrode wound in the form of a roll and the polymer film or sheet.
- the double-sided adhesive or adhesive tape may be attached to at least one end of the electrode.
- the roll-type electrode body may further include an adhesive or adhesive tape attached to the polymer film or sheet to maintain the polymer film or sheet in a rolled state.
- the tape may be attached to an arbitrary portion different from at least one end of the polymer film or sheet, or may be attached to one end and another end of the polymer film or sheet. That is, when both ends of the polymer film or sheet come into contact with each other after the polymer film or sheet is wound, the tape is attached to one end and the other end of the film or sheet to fix the wound state.
- the tape is attached to an arbitrary portion different from one end of the film or sheet. While being attached, the wound state is fixed.
- the roll-type electrode body may include an additional double-sided adhesive or adhesive tape attached to the polymer film or sheet. Such a tape may be attached to a side of the polymer film or sheet opposite to the side facing the rolled electrode.
- the present application also includes the steps of attaching an electrode and a polymer film or sheet; winding the electrode into a roll shape; And to a method for manufacturing a roll-type electrode body comprising the step of winding the roll-shaped electrode with the polymer film or sheet.
- the order in which each step of the method is performed is not particularly limited as long as a desired roll-type electrode body is manufactured.
- the electrode may be first wound in a roll form, and then a polymer film or sheet may be attached, or the winding process may be performed after the attachment.
- the electrode and the polymer film or sheet may be attached using a double-sided adhesive or adhesive tape.
- the above manufacturing method may further include fixing the rolled shape of the polymer film or sheet on which the electrode is wound with an adhesive or adhesive tape.
- the method of manufacturing the roll-type electrode body may further include attaching a double-sided adhesive or adhesive tape on the polymer film or sheet.
- the double-sided adhesive or adhesive tape may be attached to a surface opposite to a surface of the polymer film or sheet facing the rolled electrode.
- the present application also relates to a method for manufacturing a secondary battery using the rolled electrode body, and this method may include applying the rolled electrode to a process while unwinding the rolled electrode of the rolled electrode body. there is.
- the method further includes removing a portion of the electrode to which the double-sided adhesive or adhesive tape is attached. can do.
- the roll-type electrode body may further include a double-sided adhesive or adhesive tape attached to the polymer film or sheet, and connecting the electrode to another element through the medium.
- the double-sided adhesive or adhesive tape may be attached to a surface opposite to a surface of the polymer film or sheet facing the electrode wound in the form of a roll.
- the manufacturing method of the secondary battery may be performed in a so-called roll to roll process.
- the present application provides a rolled electrode body, a method for manufacturing the same, and a process (method for manufacturing a secondary battery) using the rolled electrode body.
- a roll-type electrode body that can reduce losses generated in existing processes and contribute to yield and productivity improvement, a method for manufacturing the same, and a method for manufacturing a secondary battery using the same.
- FIG. 1 and 2 are views for explaining a roll-type electrode body of the prior art.
- 3 is a diagram exemplarily representing the electrode body of the present application.
- FIG. 4 is a view for explaining one end and the other end of an electrode or polymer film.
- 5 and 6 are diagrams exemplarily representing a process of manufacturing an electrode body of the present application.
- FIG. 7 is a view exemplarily showing a form in which the electrode body of the present application is applied to a process.
- electrode body is a product including an electrode described later and a polymer film or polymer sheet, or two or more electrodes are directly connected, or the two or more electrodes are connected through the polymer film or polymer sheet products can be named.
- FIG. 3 is a conceptual diagram showing the roll-type electrode body of the present application.
- the roll-type electrode assembly includes an electrode 100 wound in a roll form; and a polymer film or sheet (hereinafter, referred to as a polymer film, etc.) 500 wound around the outside of the electrode 100 wound in the form of a roll.
- a polymer film or sheet hereinafter, referred to as a polymer film, etc.
- the roll-type electrode body may further include a double-sided adhesive or adhesive tape 301 for attaching the electrode 100 wound in the form of a roll and the polymer film or the like 500 .
- the double-sided adhesive or adhesive tape 301 may be attached to a surface of one end of the electrode 100 and an inner surface of the polymer film or the like 500 .
- one end of the electrode or polymer film is, for example, as shown in FIG. 4, the entire length of the electrode or polymer film from one end E1 of the electrode or polymer film 5000.
- the area up to 0.4 times the length (0.4L) of (L) (the area from E1 to 0.4L in FIG. 4) or the area up to 0.3 times the length (0.3L) (from E1 to 0.3L in FIG. 4) area) or an area up to 0.2 times the length (0.2L) (the area from E1 to 0.2L in FIG. 4) or an area up to 0.1 times the length (0.1L) (from E1 to 0.1L in FIG. 4) area of).
- 4 is a view of the side of the electrode or polymer film or the like 5000 .
- the one end refers to one end of the electrode or polymer film
- the other end refers to the one end and the other end. It means the opposite end.
- the area from E1 to 0.4L, the area from E1 to 0.3L, the area from E1 to 0.2L, or the area from E1 to 0.1L in FIG. It is one end, and the area from E2 to 0.4L, the area from E2 to 0.3L, the area from E2 to 0.2L, or the area from E2 to 0.1L in FIG. 4 is the other end.
- the inner surface of the polymer film or the like is the surface of the polymer film or the like 500 facing the electrode 100, and the outer surface is the surface opposite to the surface facing the electrode 100. It may be the surface of the polymer film or the like 500.
- the roll-type electrode body may further include an adhesive or adhesive tape 200 attached to a surface of at least one end of the rolled polymer film or the like 500 to fix the rolled shape.
- the adhesive or adhesive tape 200 may be attached to an outer surface of the polymer film or the like 500 .
- the adhesive or adhesive tape 200 is attached to the outer surface of both ends of the rolled polymer film or sheet 500 to fix the rolled shape, or the outer surface of one end of the polymer film or sheet 500
- the rolled form may be held while attaching the outer surface of any other part. That is, when both ends of the polymer film or sheet come into contact with each other while the polymer film or sheet 500 is wound (as shown in FIG. 3), the tape is attached to the outer surface of one end and the other end of the film or sheet and The wound state is fixed.
- both ends of the polymer film or sheet are not in contact with each other after the polymer film or sheet is wound, and one end is wound beyond the other end, the tape is separated from the outer surface of one end of the film or sheet at any other end. As it is attached to the outer surface of the part of, it fixes the wound state. Since the tape 200 fixing the wound state does not have to be a double-sided adhesive or adhesive tape, the tape 200 may be a single-sided adhesive or adhesive tape.
- the adhesive or adhesive tape 200 is attached to the outer surface of the polymer film or the like 500 and is not attached to the electrode 100 . Due to this shape, traces of the tape 200 may not be left on the electrode.
- the roll-type electrode body may include an additional double-sided adhesive or adhesive tape 302 attached to the polymer film or the like 500 .
- the adhesive or adhesive tape 302 may be formed on a surface (ie, an outer surface) opposite to the surface facing the electrode 100 on which the polymer film or the like 500 is wound in the roll form in the roll-type electrode body. can
- the tape 302 may be used to connect the rolled electrode body and other rolls or to connect the rolled electrode body and other components during the process.
- the additional double-sided adhesive or adhesive tape 302 is attached to the outer surface of the polymer film or the like 500 and is not attached to the electrode 100 . Due to this form, it is possible not to leave traces of the tape 302 on the electrode.
- the electrode 100 may be a negative electrode or a positive electrode used in a secondary battery.
- the electrode may include at least a current collector and an electrode active material layer formed on one or both surfaces of the current collector.
- FIG. 5 and 6 are diagrams illustrating a process of manufacturing a roll-type electrode body having the same shape as in FIG. 3 .
- the following process is an example for manufacturing the roll-type electrode body of the present application, and in addition to the following process, an appropriate method for manufacturing the roll-type electrode body of the present application may be applied.
- the end of the electrode 100 and the end of the polymer sheet or film 500 are attached and connected.
- the method of performing the attachment is not particularly limited, and may be attached using, for example, double-sided adhesive or adhesive tape 301.
- the electrode 100 is wound in a roll shape.
- a roll-type electrode body as shown in FIG. 3 may be manufactured by winding the polymer sheet or film 500 around the wound electrode 100 again.
- the rolled shape of the rolled polymer sheet or film 500 may be fixed with an adhesive or adhesive tape 200 to fix the roll shape if necessary.
- a step of forming a double-sided adhesive or adhesive tape 302 on the polymer film or sheet 500 may be additionally performed.
- the adhesive or adhesive tape 302 may be attached to a side of the roll-type electrode body opposite to the side of the polymer film or sheet 500 facing the rolled electrode 100 .
- FIG. 7 is a form in the process of unwinding the roll-type electrode body of the form shown in FIG. 3 and proceeding with the process, and another element 400 ( For example, it shows the form connected to other electrodes, etc.).
- This application also relates to an electrode body formed in the process of unwinding a roll-type electrode body as described above, and particularly to an electrode body in which the other element (400 in FIG. 7 ) is an electrode.
- this electrode body includes a first electrode 100; polymer film, etc. 500; and a second electrode 400 .
- first electrode 100 and the polymer film 500 are connected by a double-sided adhesive or adhesive tape 301 (hereinafter referred to as the first adhesive or adhesive tape), and the second electrode 400 and the polymer film
- the lamps 500 may be connected by a double-sided adhesive or adhesive tape 302 (hereinafter referred to as a second adhesive or adhesive tape).
- the first double-sided adhesive or adhesive tape 301 may be attached to a surface of one end of the first electrode 100 and an inner surface of one end of the polymer film or the like 500 .
- the second double-sided adhesive or adhesive tape 302 may be attached to a surface of one end of the second electrode 400 and an outer surface of the other end of the polymer film or the like 500 .
- Configurations applied to the roll-type electrode body of the present application are not particularly limited, and known materials may be appropriately employed.
- a current collector constituting the electrode as a known current collector, stainless steel surface-treated with stainless steel, aluminum, nickel, titanium, fired carbon, copper, carbon, nickel, titanium or silver, A film, sheet or foil of an aluminum-cadmium alloy or the like may be used. A known treatment such as surface treatment may be performed on the current collector.
- the thickness and shape of the current collector are not particularly limited, and an appropriate type is selected within a known range.
- Electrode active material layer formed on one or both surfaces of the current collector there is no particular limitation on the type of electrode active material layer formed on one or both surfaces of the current collector, and as a known material, a layer containing at least an electrode active material and a binder may be used.
- a known material may be used as the binder, and ingredients known to contribute to binding of components such as an active material in the active material layer and binding of the active material layer and the current collector may be used.
- a binder that can be applied PVDF (Poly (vinylidene fluoride)), PVA (poly (vinyl alcohol)), polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM ), sulfonated EPDM, SBR (Styrene-Butadiene rubber), fluorine rubber, and one or a combination of two or more selected from among other known binders may be used.
- PVDF Poly (vinylidene fluoride)
- PVA poly (vinyl alcohol)
- EPDM ethylene-propylene-diene terpolymer
- SBR Styrene-Butadiene rubber
- fluorine rubber and one or a combination of two or more
- the electrode active material included in the active material layer may be a positive active material or a negative active material, and the specific type is not particularly limited.
- the cathode active material LiCoO 2 , LiNiO 2 , LiMn 2 O 4 , LiCoPO 4 , LiFePO 4 , LiNiMnCoO 2 and LiNi 1-x-yz Co x M1 y M2 z O 2 (M1 and M2 are independently selected from each other) It is any one selected from the group consisting of Al, Ni, Co, Fe, Mn, V, Cr, Ti, W, Ta, Mg and Mo, and x, y and z are independently the atomic fractions of oxide composition elements, 0 ⁇ x ⁇ 0.5, 0 ⁇ y ⁇ 0.5, 0 ⁇ z ⁇ 0.5, 0 ⁇ x+y+z ⁇ 1) may be used, and natural graphite, artificial graphite, and carbonaceous material may be used as the negative electrode active material.
- lithium-containing titanium composite oxide LTO
- metals (Me) that are Si, Sn, Li, Zn, Mg, Cd, Ce, Ni or Fe
- an oxide (MeOx) of the metal (Me) and an active material including a composite of the metal (Me) and carbon.
- the active material in the active material layer may be within the range of 1000 to 10000 parts by weight based on 100 parts by weight of the binder.
- the ratio is 1500 parts by weight or more, 2000 parts by weight or more, 2500 parts by weight or more, 3000 parts by weight or more, 3500 parts by weight or more, 4000 parts by weight or more, or 4500 parts by weight or more, or 9500 parts by weight or less, 9000 parts by weight 8500 parts by weight or less, 8000 parts by weight or less, 7500 parts by weight or less, 7000 parts by weight or less, 6500 parts by weight or less, 6000 parts by weight or less, 5500 parts by weight or less, 5000 parts by weight or less, 4500 parts by weight or less, 4000 parts by weight or less It may be about 3500 parts by weight or less, 3000 parts by weight or less, or 2500 parts by weight or less.
- the active material layer may further include other necessary components.
- the active material layer may further include a conductive material.
- a conductive material for example, a known component may be used without particular limitation as long as it exhibits conductivity without causing chemical change in the current collector and the electrode active material.
- Graphite such as natural graphite and artificial graphite
- carbon black such as carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, and summer black
- conductive fibers such as carbon fibers and metal fibers
- metal powders such as carbon fluoride, aluminum, and nickel powder
- zinc oxide such as potassium titanate
- One or a mixture of two or more selected from conductive metal oxides such as titanium oxide, polyphenylene derivatives, and the like can be used.
- the content of the conductive material is controlled as needed and is not particularly limited, but may be included in an appropriate ratio within the range of 0.1 to 20 parts by weight or 0.3 to 12 parts by weight based on 100 parts by weight of the active material.
- a method of determining the content of the conductive material at an appropriate level in consideration of the cycle life of the battery is known.
- the active material layer includes other known ingredients (eg, carboxymethyl cellulose (CMC), starch, thickener such as hydroxypropyl cellulose or regenerated cellulose, etc.) required in addition to the above ingredients. You may.
- CMC carboxymethyl cellulose
- starch starch
- thickener such as hydroxypropyl cellulose or regenerated cellulose, etc.
- the thickness of the active material layer is not particularly limited, and may be controlled to have an appropriate level of thickness in consideration of desired performance.
- the thickness of the active material layer may be in the range of about 10 to 500 ⁇ m. In another example, the thickness is about 30 ⁇ m or more, 50 ⁇ m or more, 70 ⁇ m or more, 90 ⁇ m or more, or 100 ⁇ m or more, or about 450 ⁇ m or less, 400 ⁇ m or less, 350 ⁇ m or less, 300 ⁇ m or less, 250 ⁇ m or less, 200 ⁇ m or less It may be on the order of ⁇ m or less or 150 ⁇ m or less.
- the active material layer may be formed to have a certain level of porosity.
- the porosity is usually controlled by rolling in the manufacturing process of the electrode.
- the porosity of the active material layer may be about 35% or less.
- the porosity is within the range of 33% or less, 31% or less, 29% or less, or 27% or less and/or 5% or more, 7% or more, 9% or more, 11% or more, 13% or more, 15% or more, 17% It may be further adjusted within the range of 19% or more, 21% or more, 23% or more, or 25% or more.
- Such an electrode may be manufactured, for example, by coating the current collector with a slurry containing the active material and the like, and then going through a drying and rolling process.
- This slurry may include a solvent together with the active material and a binder.
- a method of applying the slurry on the surface of the current collector is not particularly limited, and a known coating method, for example, spin coating, comma coating, bar coating, or the like, may be applied.
- a known polymer film or sheet may be used without particular limitation.
- a polycarbonate film or sheet a polyester film such as a poly(ethylene terephthalate) (PET) film or sheet, a polyolefin film or sheet such as a polyethylene or polypropylene film or sheet, a poly(methylmethacrylate) (PMMA) film, or
- PET poly(ethylene terephthalate)
- PMMA poly(methylmethacrylate)
- An acrylic polymer film such as a sheet or a known film such as a sheet may be applied.
- double-sided or single-sided adhesive or adhesive tape to be applied a well-known appropriate adhesive or adhesive tape used in the related field may be selected and used.
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
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- Engineering & Computer Science (AREA)
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- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims (17)
- 롤 형태로 감겨져 있는 전극; 및상기 롤 형태로 감겨져 있는 전극의 외측을 감고 있는 고분자 필름 또는 시트를 포함하는 롤형 전극체.
- 제 1 항에 있어서, 전극은 집전체 및 상기 집전체의 적어도 일면에 형성된 전극 활물질층을 포함하는 롤형 전극체.
- 제 1 항 또는 제 2 항에 있어서, 롤 형태로 감겨져 있는 전극과 고분자 필름 또는 시트를 부착시키고 있는 양면 점착 테이프 또는 접착 테이프를 추가로 포함하는 롤형 전극체.
- 제 3 항에 있어서, 양면 점착 또는 접착 테이프는 전극의 일 말단의 표면과 고분자 필름 또는 시트의 내측 표면을 부착시키고 있는 롤형 전극체.
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서, 고분자 필름 또는 시트에 부착되어, 상기 고분자 필름 또는 시트의 감긴 상태를 유지하고 있는 점착 또는 접착 테이프를 추가로 포함하는 롤형 전극체.
- 제 5 항에 있어서, 점착 또는 접착 테이프는, 고분자 필름 또는 시트의 외측 표면에 부착되고, 전극에는 부착되어 있지 않은 롤형 전극체.
- 제 1 항 내지 제 6 항 중 어느 한 항에 있어서, 고분자 필름 또는 시트의 외측 표면에 부착되어 있는 양면 점착 또는 접착 테이프를 추가로 포함하는 롤형 전극체.
- 제 7 항에 있어서, 고분자 필름 또는 시트의 외측 표면에 부착되어 있는 양면 점착 또는 접착 테이프는, 전극에 부착되어 있지 않은 롤형 전극체.
- 전극과 고분자 필름 또는 시트를 부착하는 단계;상기 전극을 롤 형태로 감는 단계; 및상기 롤 형태로 감긴 전극을 상기 고분자 필름 또는 시트로 감는 단계를 포함하는 롤형 전극체의 제조 방법.
- 제 9 항에 있어서, 전극과 고분자 필름 또는 시트의 부착은 양면 점착 또는 접착 테이프로 수행하는 롤형 전극체의 제조 방법.
- 제 9 항 또는 제 10 항에 있어서, 전극을 감은 고분자 필름 또는 시트의 감긴 형태를 점착 또는 접착 테이프로 고정하는 단계를 추가로 수행하는 롤형 전극체의 제조 방법.
- 제 9 항 내지 제 11 항 중 어느 한 항에 있어서, 고분자 필름 또는 시트의 롤 형태로 감겨져 있는 전극을 향하는 면과는 반대측 면에 양면 점착 또는 접착 테이프를 부착하는 단계를 추가로 수행하는 롤형 전극체의 제조 방법.
- 제 1 전극; 고분자 필름 또는 시트; 및 제 2 전극을 포함하고,상기 제 1 전극과 고분자 필름 또는 시트는, 상기 제 1 전극의 일 말단의 표면과 상기 고분자 필름 또는 시트의 일 말단의 내측 표면에 부착되어 있는 제 1 양면 점착 또는 접착 테이프로 연결되어 있고,상기 제 2 전극과 고분자 필름 또는 시트는, 상기 제 2 전극의 일 말단의 표면과 상기 고분자 필름 또는 시트의 다른 말단의 외측 표면에 부착되어 있는 양면 점착 또는 접착 테이프로 연결되어 있는 전극체.
- 제 1 항의 롤형 전극체를 사용하여 이차 전지를 제조하는 방법으로서,롤 형태로 감겨져 있는 전극을 풀면서 공정에 적용하는 단계를 포함하는 이차 전지의 제조 방법.
- 제 14 항에 있어서, 롤형 전극체는, 전극과 고분자 필름 또는 시트를 부착시키고 있는 양면 점착 또는 접착 테이프를 추가로 포함하고,상기 양면 점착 또는 접착 테이프가 부착되어 있는 전극의 부분을 제거하는 단계를 추가로 수행하는 이차 전지의 제조 방법.
- 제 14 항 또는 제 15 항에 있어서, 롤형 전극체는, 고분자 필름 또는 시트의 롤 형태로 감겨져 있는 전극을 향하는 면과는 반대측 면에 부착되어 있는 양면 점착 또는 접착 테이프를 추가로 포함하고, 상기 양면 점착 또는 접착 테이프를 매개로 상기 전극을 다른 요소와 연결하는 단계를 추가로 수행하는 이차 전지의 제조 방법.
- 제 14 항 내지 제 16 항 중 어느 한 항에 있어서, 롤투롤 공정인 이차 전지의 제조 방법.
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| EP22884001.3A EP4358205A4 (en) | 2021-10-19 | 2022-10-19 | ROLL-LIKE ELECTRODE BODY |
| CN202280052204.2A CN117836987A (zh) | 2021-10-19 | 2022-10-19 | 卷筒型电极体 |
| JP2024503464A JP7827367B2 (ja) | 2021-10-19 | 2022-10-19 | ロール状電極体 |
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| KR1020220134010A KR20230055983A (ko) | 2021-10-19 | 2022-10-18 | 롤형 전극체 |
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| US20240339649A1 (en) | 2024-10-10 |
| JP2024528669A (ja) | 2024-07-30 |
| EP4358205A4 (en) | 2025-02-19 |
| EP4358205A1 (en) | 2024-04-24 |
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