WO2023282666A1 - 전극 및 이의 제조 방법 - Google Patents
전극 및 이의 제조 방법 Download PDFInfo
- Publication number
- WO2023282666A1 WO2023282666A1 PCT/KR2022/009862 KR2022009862W WO2023282666A1 WO 2023282666 A1 WO2023282666 A1 WO 2023282666A1 KR 2022009862 W KR2022009862 W KR 2022009862W WO 2023282666 A1 WO2023282666 A1 WO 2023282666A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- active material
- material layer
- electrode
- masking tape
- current collector
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000011149 active material Substances 0.000 claims abstract description 107
- 230000000873 masking effect Effects 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 239000010410 layer Substances 0.000 claims description 54
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000638 solvent extraction Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 description 8
- 239000010408 film Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 239000007773 negative electrode material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000006182 cathode active material Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000006183 anode active material Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical class C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000006245 Carbon black Super-P Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- -1 Denka Black Substances 0.000 description 1
- 229910010701 LiFeP Inorganic materials 0.000 description 1
- 229910013716 LiNi Inorganic materials 0.000 description 1
- 229910012465 LiTi Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical compound [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- CASZBAVUIZZLOB-UHFFFAOYSA-N lithium iron(2+) oxygen(2-) Chemical compound [O-2].[Fe+2].[Li+] CASZBAVUIZZLOB-UHFFFAOYSA-N 0.000 description 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
- B05D1/322—Removable films used as masks
- B05D1/325—Masking layer made of peelable film
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
-
- 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
Definitions
- the present invention relates to an electrode and a method for manufacturing the same, and more specifically, to an electrode in which a corner portion where an upper surface of an active material layer and a side wall surface forming a thickness of the active material layer meet is formed in a right angle shape, and a method for manufacturing the electrode.
- lithium secondary batteries having high energy density and voltage are commercialized and widely used.
- a lithium secondary battery has a structure in which an electrolyte containing a lithium salt is impregnated with an electrode assembly in which an active material is applied on a current collector, that is, an electrode assembly in which a porous separator is interposed between a positive electrode and a negative electrode.
- the electrode is a mixing process of preparing a slurry by mixing / dispersing an active material, a binder, and a conductive material in a solvent, a coating process of applying the active material slurry to a thin film current collector and drying it, and increasing the capacity density of the electrode after the coating process It is manufactured by forming an active material layer on the current collector through a pressing process for increasing adhesion between the current collector and the active material.
- mismatching causes the position of the active material layer to shift when the positive/negative electrodes face each other, and the misaligned portion reduces the efficiency of charging and discharging.
- the mismatching portion may cause lithium to be deposited on the surface of the negative electrode, and when such lithium precipitation occurs for a long time, battery capacity decreases.
- the present invention was made to solve the above problems of the prior art,
- an object of the present invention is to provide a method of manufacturing an electrode in which a corner portion where an upper surface of the active material layer and a side wall surface forming the thickness of the active material layer meet can be formed in a right angle shape.
- an object of the present invention is to provide an electrode in which a corner portion where an upper surface of an active material layer and a sidewall surface forming a thickness of the active material layer meet is formed in a right angle shape to improve battery capacity.
- an electrode comprising a current collector manufactured by the manufacturing method of the present invention and an active material layer laminated on one or both sides of the current collector
- an electrode characterized in that a corner portion adjacent to the active material non-laminated portion and where the top surface of the active material layer and the side wall surface forming the thickness of the active material layer meet includes a partial shape of a cut groove.
- the manufacturing method of the electrode of the present invention provides an effect of uniformly forming the end of the active material layer and preventing the formation of a sliding part and/or a mismatching part.
- the electrode of the present invention is formed in a right-angled corner portion where the top surface of the active material layer and the side wall surface forming the thickness of the active material layer meet, providing an effect of increasing the capacity of the battery.
- FIG. 1 is a view schematically showing a method of forming an electrode in the prior art
- FIG. 2 is a view showing problems that occur when an active material is applied to a current collector according to the prior art
- FIG. 3 is a diagram schematically showing a sliding part and a mismatching part that occur when an active material is applied to a current collector according to the prior art
- FIGS. 4 to 6 are diagrams showing one embodiment of the manufacturing method of the electrode of the present invention.
- FIG. 7 and 8 are views illustrating an embodiment in which a masking tape is attached by a roll-to-roll process in the method of manufacturing an electrode of the present invention.
- the active material non-laminated portion is also referred to as a “non-coating portion” and refers to a portion where an electrode tab is formed.
- the masking tape 20 may be used known in the art.
- An adhesive tape may be preferably used as the masking tape, and the adhesive tape may include a film substrate 24 and an adhesive layer 22 formed on one surface of the film substrate.
- the bonding strength of the adhesive layer 22 to the current collector 10 must be weaker than the bonding strength of the adhesive layer 22 to the film substrate 24, and there must be a difference in bonding strength so that the adhesive tape adheres to the current collector. It is preferable because it can be removed without remaining.
- the cutting groove in step (c) may be formed using a means known in the art, such as a knife, and is particularly preferably formed using a laser. This is because when a knife or the like is used, it is difficult to uniformly form the groove surface of the cutting groove, the operation becomes inconvenient due to the active material debris removed during the groove forming process, and the quality of the active material layer may be damaged.
- the shape of the cutting groove is not particularly limited, but may be a shape similar to a letter U, a shape similar to a letter V, and the like. At this time, the cut groove similar to the letter U may be formed so that the bottom surface and the wall surface are perpendicular to each other.
- the cutting groove may have a width of 10 ⁇ m to 200 ⁇ m and a depth of 10 ⁇ m to 200 ⁇ m, but the size of the cutting groove must be formed differently depending on the thickness of the active material layer and the thickness of the masking tape, so it is limited to the above range it is not going to be
- the laser device may include a laser source generator, a delivery mirror, a laser beam width controller, and a scanner unit, and the scanner may include a galvano mirror and a theta lens. etc. may be included.
- the laser source generator may be, for example, an IR Fiber laser source generator, and the laser wavelength may be 1000 to 1100 nm, preferably 1060 to 1080 nm, but is not limited thereto.
- the cutting groove may be formed by using a laser after supplying water to the cutting groove formation region.
- a laser In the case of forming cut grooves using a laser without supplying water, it is undesirable because the problem of deteriorating the active material by the heat of the laser (heat affected zone occurs) occurs. Therefore, in the present invention, after supplying water in advance before forming a cut groove by a laser, the laser is applied.
- the moisture supply method is not particularly limited, but, for example, water may be supplied by spraying water to the active material using a spray device or the like.
- the supply of water be made, for example, 5 seconds to 30 seconds before applying the laser. This is because sufficient time is required for moisture to be supplied to the inside of the active material before laser application.
- the degree of moisture absorption varies depending on the composition of the active material, it is not limited to the above range.
- the (b) active material layer lamination step may be carried out by a method of coating the active material layer and a part or all of the top of the masking tape.
- the step of laminating the active material may further include compressing the coated active material after coating the active material.
- the active material coating step and the pressing step may be performed by methods known in the art.
- step (c) in step (c), as shown in FIG. 4, it may be preferable to form the cut groove on the side of the active material located on the masking tape around the boundary line between the masking tape and the active material.
- the cutting groove is formed at the above location, as shown in FIG. 6 , after removing the masking tape, the cross section of the remaining active material layer may be formed close to a right angle, which may be advantageous in securing battery capacity.
- the masking tape attachment in steps (a) to (d) may be performed by a roll-to-roll process, as illustrated in FIGS. 7 to 8 there is.
- the masking tape may include a film substrate and an adhesive layer (PSA), and a release film further attached to the adhesive layer may be used, and the release film may include a masking tape on a current collector. It can be removed prior to bonding.
- PSA adhesive layer
- the active material may be laminated on the current collector to which the masking tape is not attached or on the portion to which the masking tape is attached and the current collector to which the masking tape is not attached by a conventional roll-to-roll process.
- the roll-to-roll process may be performed by a method known in the art.
- an electrode comprising a current collector manufactured by the manufacturing method of the present invention and an active material layer laminated on one or both sides of the current collector
- a corner portion where an upper surface of the active material layer and a side wall surface forming the thickness of the active material layer meet may include a partial shape of a cut groove and may be formed in a right angle shape.
- the right angle shape includes a substantially right angle shape as well as a right angle conforming to strict standards.
- a side wall surface forming the thickness of the active material layer may be a side wall surface in a direction in which an electrode tab is formed.
- the electrode may be formed by the manufacturing method of the electrode of the present invention.
- current collectors known in this field may be used without limitation as the positive current collector or the negative current collector, for example, copper, aluminum, gold, nickel, copper alloy, or a combination thereof. and foils manufactured by
- the active material layer may be a positive active material layer or a negative active material layer.
- the active material layer may be formed of an active material slurry including a positive electrode active material or a negative electrode active material and a binder, and the active material slurry may further include a conductive material and, if necessary, a dispersant.
- the cathode active material As the cathode active material, the anode active material, the binder, and the conductive material, components known in the art may be used without limitation.
- cathode active material examples include lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron oxide, LiNi x Mn y Co z O 2 (NMC), a three-component cathode material, or a lithium composite oxide obtained by combining these.
- NMC LiNi x Mn y Co z O 2
- a sulfur-carbon composite may be included as a cathode active material.
- anode active material examples include LiTi 2 (PO 4 ) 3 , Li 3 V 2 (PO 4 ) 3 , LiVP 2 O 7 , LiFeP 2 O 7 , LiVPO 4 F, LiVPO 4 O, and LiFeSO 4 F.
- the negative electrode active material may have a carbon coating layer formed on a surface thereof.
- Examples of the conductive material include carbon black such as Super-P, Denka Black, Acetylene Black, Ketjen Black, Channel Black, Furnace Black, Lamp Black, Summer Black, and Carbon Black; carbon derivatives such as carbon nanotubes and fullerenes; conductive fibers such as carbon fibers and metal fibers; metal powders such as carbon fluoride, aluminum, and nickel powder; or conductive polymers such as polyaniline, polythiophene, polyacetylene, and polypyrrole; etc. can be used.
- carbon black such as Super-P, Denka Black, Acetylene Black, Ketjen Black, Channel Black, Furnace Black, Lamp Black, Summer Black, and Carbon Black
- carbon derivatives such as carbon nanotubes and fullerenes
- conductive fibers such as carbon fibers and metal fibers
- metal powders such as carbon fluoride, aluminum, and nickel powder
- conductive polymers such as polyaniline, polythiophene, polyacetylene, and polypyrrole; etc.
- the electrode may be a positive electrode or a negative electrode, and the manufacturing method thereof is not particularly limited, and may be manufactured in a form in which a positive electrode active material or a negative electrode active material is bound to a current collector according to a conventional method known in the art.
- the electrode may be one used in a secondary battery, for example, one used in a lithium ion secondary battery.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (10)
- (a) 집전체 표면을 활물질층 적층부와 활물질 비적층부로 구획하고, 상기 활물질 비적층부에 마스킹 테이프를 부착하는 단계;(b) 상기 마스킹 테이프가 부착된 집전체에 활물질층을 적층하는 단계;(c) 상기 활물질층의 상부면에 하부의 마스킹 테이프와 활물질의 경계를 따라 절단홈을 형성하는 단계; 및(d) 상기 마스킹 테이프를 상기 절단홈을 따라 제거하여 활물질 비적층부를 형성하는 단계;를 포함하는 전극의 제조 방법.
- 제1항에 있어서,상기 (c) 단계의 절단홈은 레이저를 사용하여 형성하는 것을 특징으로 하는 전극의 제조 방법.
- 제2항에 있어서,상기 절단홈은 절단홈 형성 부위에 수분을 공급한 후, 레이저를 사용하여 형성하는 것을 특징으로 하는 전극의 제조 방법.
- 제1항에 있어서,상기 (b)단계는 활물질 코팅 단계 및 압착 단계를 포함하는 것을 특징으로 하는 전극의 제조 방법.
- 제1항에 있어서,상기 (c)단계에서 절단홈은 마스킹 테이프와 활물질의 경계선을 중심으로 마스킹 테이프 위에 위치된 활물질 쪽에 형성하는 것을 특징으로 하는 전극의 제조 방법.
- 제1항에 있어서,상기 마스킹 테이프는 필름기재와 상기 필름기재의 일면에 점착층이 형성된 점착 테이프인 것을 특징으로 하는 전극의 제조 방법.
- 제1항에 있어서,상기 (a)단계 내지 (d)단계는 롤투롤(Roll-to-Roll) 공정에 의해 실시되는 것을 특징으로 하는 전극의 제조 방법.
- 집전체 및 상기 집전체의 일면 또는 양면에 적층된 활물질층을 포함하는 제1항의 방법으로 제조된 전극으로서,활물질 비적층부에 인접하며, 활물질층의 상부면과 활물질층의 두께를 형성하는 측벽면이 만나는 모서리부가 절단홈의 일부형태를 포함하는 것을 특징으로 하는 전극.
- 제8항에 있어서,상기 활물질층의 두께를 형성하는 측벽면은 전극탭이 형성되는 방향의 측벽면인 것을 특징으로 하는 전극.
- 제8항에 있어서,상기 전극은 제1항의 방법으로 제조된 것을 특징으로 하는 전극.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023574834A JP2024520732A (ja) | 2021-07-08 | 2022-07-07 | 電極及びその製造方法 |
EP22838018.4A EP4333090A1 (en) | 2021-07-08 | 2022-07-07 | Electrode and manufacturing method therefor |
CN202280042234.5A CN117480627A (zh) | 2021-07-08 | 2022-07-07 | 电极及其制备方法 |
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Citations (6)
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JP2000251942A (ja) | 1999-03-01 | 2000-09-14 | Matsushita Battery Industrial Co Ltd | 非水電解液二次電池の製造方法 |
KR20050096926A (ko) * | 2002-12-27 | 2005-10-06 | 마쯔시다덴기산교 가부시키가이샤 | 집전체 시트 및 전기화학 소자 |
US20180358645A1 (en) * | 2015-12-22 | 2018-12-13 | Nec Corporation | Secondary cell and method for manufacturing same |
KR20200016285A (ko) * | 2017-08-24 | 2020-02-14 | 비클 에너지 재팬 가부시끼가이샤 | 이차 전지 |
KR20210065033A (ko) * | 2019-11-26 | 2021-06-03 | 도요타 지도샤(주) | 비수 전해질 이차 전지 |
KR20210089425A (ko) | 2020-01-08 | 2021-07-16 | 주식회사 에듀에스알티 | 모바일 영어단어 학습장치 및 그의 동작방법 |
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- 2022-07-07 JP JP2023574834A patent/JP2024520732A/ja active Pending
- 2022-07-07 CN CN202280042234.5A patent/CN117480627A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000251942A (ja) | 1999-03-01 | 2000-09-14 | Matsushita Battery Industrial Co Ltd | 非水電解液二次電池の製造方法 |
KR20050096926A (ko) * | 2002-12-27 | 2005-10-06 | 마쯔시다덴기산교 가부시키가이샤 | 집전체 시트 및 전기화학 소자 |
US20180358645A1 (en) * | 2015-12-22 | 2018-12-13 | Nec Corporation | Secondary cell and method for manufacturing same |
KR20200016285A (ko) * | 2017-08-24 | 2020-02-14 | 비클 에너지 재팬 가부시끼가이샤 | 이차 전지 |
KR20210065033A (ko) * | 2019-11-26 | 2021-06-03 | 도요타 지도샤(주) | 비수 전해질 이차 전지 |
KR20210089425A (ko) | 2020-01-08 | 2021-07-16 | 주식회사 에듀에스알티 | 모바일 영어단어 학습장치 및 그의 동작방법 |
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CN117480627A (zh) | 2024-01-30 |
JP2024520732A (ja) | 2024-05-24 |
EP4333090A1 (en) | 2024-03-06 |
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