EP4292149A1 - Procédé de fabrication d'une anode pour une batterie lithium-ion et batterie lithium-ion - Google Patents

Procédé de fabrication d'une anode pour une batterie lithium-ion et batterie lithium-ion

Info

Publication number
EP4292149A1
EP4292149A1 EP22706770.9A EP22706770A EP4292149A1 EP 4292149 A1 EP4292149 A1 EP 4292149A1 EP 22706770 A EP22706770 A EP 22706770A EP 4292149 A1 EP4292149 A1 EP 4292149A1
Authority
EP
European Patent Office
Prior art keywords
anode
coating composition
collector carrier
lithium
carrier foil
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.)
Pending
Application number
EP22706770.9A
Other languages
German (de)
English (en)
Inventor
Hideki Ogihara
Thomas Woehrle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP4292149A1 publication Critical patent/EP4292149A1/fr
Pending legal-status Critical Current

Links

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
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0419—Methods of deposition of the material involving spraying
    • 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
    • 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
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0435—Rolling or calendering
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • 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
    • H01M4/742—Meshes or woven material; Expanded metal perforated material
    • 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 invention relates to a method for producing an anode for a lithium-ion battery and a lithium-ion battery.
  • lithium ion battery is used synonymously for all designations commonly used in the prior art for galvanic elements and cells containing lithium, such as lithium battery, lithium cell, lithium ion cell, lithium polymer cell, lithium ion battery cell and lithium-ion accumulator. Specifically, rechargeable batteries (secondary batteries) are included.
  • battery and “electrochemical cell” are also used synonymously with the terms “lithium ion battery” and “lithium ion cell”.
  • a lithium ion battery has at least two different electrodes, a positive (cathode) and a negative (anode) electrode. Each of these electrodes includes at least one active material, optionally together with additives such as electrode binders and electrical conductivity additives.
  • the active materials and existing passive materials of the electrodes are each applied to a carrier film, which is usually formed from a metal and is used for electrical contacting of the respective electrode. Films of this type are not permeable to the electrolyte, which means that complete wetting of the electrode by the electrolyte can be made more difficult, reduced and/or slowed down.
  • carrier films with prefabricated openings are known in the prior art, which enable the electrolyte allow to penetrate the carrier foil and in this way improve the wetting behavior.
  • carrier foils have the disadvantage that their mechanical stability and resilience is reduced due to the existing openings, which can result in damage and/or deformation during manufacture and/or handling of the electrode. Expensive production processes for the electrodes can also be necessary in order to prevent coating masses applied to the carrier film from dripping through the openings that are present and to prevent dirt from accumulating in the openings. Furthermore, carrier foils with prefabricated openings or porosity, such as perforated foils or expanded metals, are more expensive than simple carrier foils without such openings.
  • the object of the invention is achieved by a method for producing an anode for a lithium-ion battery comprising the following steps: An anode-collector carrier foil is provided and a coating composition containing a particulate auxiliary material is applied to at least one side of the anode-collector carrier foil. The coating composition is then compacted to form an anode film on the anode-collector carrier foil, the anode-collector carrier foil being perforated by the particulate auxiliary material when the coating composition is compacted.
  • the anode-collector carrier foil is provided with at least one opening in situ during the production of the anode, the at least one opening enabling excellent wettability of the anode produced by the method according to the invention with an electrolyte. In this way, rapid, uniform, and complete wetting of the anode with electrolyte can be achieved once the anode is installed in a lithium-ion battery.
  • anode-collector carrier foils without prefabricated openings as are known in the prior art, for example rolled copper foils are used, which are available anywhere in the world and at low cost.
  • anode-collector carrier foil remains mechanically resilient during the production of the anode, so that no complex adjustments to production lines for the production of the anode and downstream production steps for the assembly of lithium-ion batteries with such an anode are necessary.
  • the anode-collector carrier foil is in particular a copper foil and serves as a current collector for the anode.
  • the particulate auxiliary material must be harder than the anode-collector carrier film in order to be able to perforate it.
  • perforating here and in the following is understood to mean the creation of at least one opening, with the opening extending over the entire thickness of the anode-collector carrier foil.
  • the coating mass can be compacted using any of the methods known in the prior art.
  • the coating mass is compacted by means of calenders.
  • the openings can have any desired shape, for example circular, arcuate and/or polygonal.
  • the shape of the cross section essentially depends on the morphology of the particulate auxiliary material and the method used to compact the coating composition.
  • the coating compound is applied to the anode-collector carrier foil in particular in such a way that the particulate auxiliary material is directly adjacent to the anode-collector carrier foil before compaction.
  • the coating compound can be applied to only one side or both sides of the anode-collector carrier film.
  • the particulate auxiliary material may be selected from the group consisting of lithium ion conductors, Al2O3, TiO2, B2O3, boehmite, artificial diamond dust, and combinations thereof.
  • lithium ion conductor is understood here to mean a compound that can conduct lithium ions but does not represent an active material of a lithium ion battery.
  • the lithium ion conductor may include a perovskite structure material, a garnet structure material, a LISICON-derived structure material, a sulfide, an oxide, and/or a polymer.
  • a suitable material with a garnet structure is, for example, Li 7 La 3 Zr 2 Oi 2 .
  • the particulate auxiliary material has in particular a Mohs hardness in the range from 2 to 10, preferably a Mohs hardness of greater than 3.0 to 10, for example 3.2 to 10.
  • the hardness of the particulate auxiliary material can be determined according to DIN EN ISO 14577, using the nanoindentation method.
  • Nanoindentation also described as an instrumented indentation test, is a measurement method used in materials testing to determine the hardness of materials on small length scales in the nanometer range.
  • the particulate auxiliary material preferably has a morphology which the perforation of the anode-collector carrier film when compacting Coating composition favored.
  • the particulate auxiliary material has at least one edge, corner, point, spike and/or projection.
  • the particulate auxiliary material is in the form of an agglomerate of a plurality of agglomerate particles
  • one of the agglomerate particles can assume the function of the tip, the dome and/or the projection.
  • the average particle size D50 of the particulate auxiliary material is in particular at least 0.5 times the thickness of the anode-collector carrier film, preferably at least 0.8 times the thickness of the anode-collector carrier film.
  • the average particle size D50 of the particulate auxiliary material is in the range from 5 to 10 ⁇ m, preferably from 7 to 8.5 ⁇ m.
  • the coating composition can contain an additive selected from the group consisting of synthetic graphite, natural graphite, carbon nanotubes, carbon fibers, soft carbon, hard carbon and combinations thereof.
  • the addition can increase the conductivity of the coating composition and thus lead to improved performance properties of the anode produced.
  • the addition can improve the processability and/or the applicability of the coating composition.
  • the additive can perforate the anode-collector carrier foil in addition to the particulate auxiliary material.
  • the coating composition can include a binder, the binder being selected in particular from the group consisting of styrene butadiene rubber (SBR), polyvinylpyrrolidone (PVP), polyamide (PA), polyvinylidene fluoride (PVdF), polyvinylidene fluoride-hexafluoropropylene (PVdF-HFP), polyacrylate, carboxymethyl cellulose (CMC), polyimide (PI), PTFE and combinations thereof.
  • SBR styrene butadiene rubber
  • PVP polyvinylpyrrolidone
  • PA polyamide
  • PVdF polyvinylidene fluoride
  • PVdF-HFP polyvinylidene fluoride-hexafluoropropylene
  • CMC carboxymethyl cellulose
  • PI polyimide
  • PTFE PTFE and combinations thereof.
  • the binder is tailored in particular to the active material provided in the anode and to other components of the electrode.
  • the viscosity of the coating composition can be adjusted in a targeted manner via the selection of the binder and the content of the binder in the coating composition. In this way, the behavior of the coating mass can be influenced in a targeted manner in the coating process used in each case.
  • the coating composition can be applied to the anode-collector carrier film by means of wet coating, dry coating, pressing, laminating, coating, extruding and/or spraying.
  • the coating composition can include an anode active material and/or an active material coating composition can additionally be applied to the anode-collector carrier film.
  • the active material coating composition comprises an anode active material and optionally an active material binder, a solvent and/or additives, in particular conductivity additives.
  • the anode active material can be selected from the group consisting of carbonaceous materials, silicon, silicon composites, silicon suboxide, silicon alloys, lithium, lithium alloys, aluminum alloys, indium, indium alloys, tin, tin alloys, cobalt alloys, niobium pentoxide, titanium dioxide, titanates, for example lithium titanate (LLTisOia), tin dioxide and mixtures thereof.
  • carbonaceous materials silicon, silicon composites, silicon suboxide, silicon alloys, lithium, lithium alloys, aluminum alloys, indium, indium alloys, tin, tin alloys, cobalt alloys, niobium pentoxide, titanium dioxide, titanates, for example lithium titanate (LLTisOia), tin dioxide and mixtures thereof.
  • the anode active material is preferably selected from the group consisting of synthetic graphite, natural graphite, graphene, mesocarbon, doped carbon, hard carbon, soft carbon, fullerene, silicon-carbon composite, silicon, surface-coated silicon, silicon suboxide, silicon alloys, lithium, aluminum alloys, indium, tin alloys, cobalt alloys and mixtures thereof.
  • the anode active material can at least partially assume the function of the particulate auxiliary if the anode active material has a higher hardness than the anode collector carrier foil and is particulate, for example if the anode active material comprises particulate silicon.
  • compositions of the coating composition and of the active material coating composition are matched to one another in order to obtain an anode that is as efficient as possible.
  • the coating composition is applied to the anode-collector carrier film before the active-material coating composition.
  • the coating compound is applied in a first layer to the anode-collector carrier film and then the active material coating compound is applied in a second layer over the first layer.
  • the ratio of the thickness of the first layer to the second layer is in particular in the range from 1:2 to 1:100, preferably from 1:3 to 1:40.
  • the coating composition is already compacted before the active material coating composition is applied, and in this way the at least one opening is produced through the auxiliary material in the anode-collector carrier film.
  • the active material coating composition applied after compacting the coating composition is preferably compacted in a subsequent second compaction step, with the auxiliary material also being able to perforate and/or cut open the anode-collector carrier film in the second compaction step.
  • the first and the second layer can be applied using the same coating device, preferably with a time offset of at most a few seconds.
  • the coating composition can be sprayed onto the anode-collector carrier foil via a spray nozzle before, in particular immediately before, the active material coating composition is applied.
  • the coating composition and the active material coating composition are applied to the anode-collector carrier foil in a single process step.
  • the coating mass is mixed with the active material coating mass before application to form a total mass and the total mass is applied to the anode-collector carrier film, for example by means of a nozzle.
  • the particulate auxiliary material contained in the coating composition can be deposited by gravity after the application of the total mass, so that direct contact between the anode-collector carrier foil and the particulate auxiliary material can be ensured before compaction even when using a total mass.
  • the viscosity of the bulk, the coating and/or the active material coating may be adjusted. This can be done by selecting the binder and/or by adding a suitable solvent.
  • the object of the invention is also achieved by a lithium-ion battery comprising at least one anode which can be obtained using a method as described above.
  • the lithium-ion battery according to the invention Due to the openings in the anode-collector carrier foil produced in the anode production process, the lithium-ion battery according to the invention has uniform and complete wetting of the at least one anode with electrolyte, as a result of which the lithium-ion battery according to the invention has a high current-carrying capacity, high maximum charging and discharging rate, good cycle stability and can have a long service life.
  • the electrolyte includes in particular a solvent and at least one lithium conductive salt dissolved therein.
  • the solvent is preferably inert.
  • Suitable solvents are, for example, organic solvents such as ethylene carbonate, propylene carbonate, Butylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, fluoroethylene carbonate (FEC), sulpholane, 2-methyltetrahydrofuran and 1,3-dioxolane.
  • organic solvents such as ethylene carbonate, propylene carbonate, Butylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, fluoroethylene carbonate (FEC), sulpholane, 2-methyltetrahydrofuran and 1,3-dioxolane.
  • Ionic liquids can also be used as solvents. Such ionic liquids contain only ions. Preferred cations, which can be alkylated in particular, are imidazolium, pyridinium, pyrrolidinium, guanidinium, uronium, thiuronium, piperidinium, morpholinium, sulfonium, ammonium and phosphonium cations. Examples of anions that can be used are halide, tetrafluoroborate, trifluoroacetate, triflate, hexafluorophosphate, phosphinate and tosylate anions.
  • ionic liquids examples are: N-methyl-N-propylpiperidinium bis(trifluoromethylsulfonyl)imide, N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide, N-butyl-N-trimethyl -ammonium bis(trifluoromethylsulfonyl)imide, triethylsulfonium bis(trifluoromethylsulfonyl)imide and N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide.
  • two or more of the above liquids can be used.
  • Preferred lithium conductive salts are lithium salts which have inert anions and which are preferably non-toxic. Suitable lithium salts are, in particular, lithium hexafluorophosphate (LiPFe), lithium tetrafluoroborate (L1BF4) and mixtures of these salts.
  • LiPFe lithium hexafluorophosphate
  • Li1BF4 lithium tetrafluoroborate
  • the lithium ion battery may be a traction battery in a vehicle.
  • the lithium-ion battery can also be used in a wearable, an e-bike, a smartphone, a power tool, a laptop, an e-book reader, a mobile power bank or a stationary energy storage device.
  • FIG. 1 schematically shows a sectional view of an anode as it is known in the prior art
  • 2 is a diagrammatic sectional view of an anode which can be manufactured using a method according to the invention
  • FIG. 3 is a block diagram of the method according to the invention for manufacturing the anode of FIG. 2, and
  • Fig. 4 is a schematic sectional view of an intermediate stage in the manufacture of the anode of Fig. 2.
  • FIG. 1 shows a schematic sectional view of an anode 10 of a lithium-ion battery, not according to the invention, as is known in the prior art.
  • the anode 10 includes an anode collector carrier film 12, which also serves as a current conductor of the anode 10.
  • the anode-collector carrier foil 12 is in particular a copper foil.
  • An anode active material 18 in the form of an anode film 19 is applied to a first main surface 14 and to a second main surface 16 , opposite the first main surface 14 , of the anode collector carrier foil 12 .
  • the anode active material 18 can be any material known in the art that is capable of reversibly accepting or donating lithium ions.
  • the anode-collector carrier foil 12 has no openings whatsoever. Accordingly, the anode-collector carrier foil 12 is impermeable to an electrolyte, as a result of which the wetting of the anode 10 with the electrolyte in a lithium-ion battery takes place only slowly and/or incompletely.
  • FIG. 2 shows an anode 10 as can be obtained by a method according to the invention for producing an anode.
  • the anode 10 shown in FIG. 2 has an anode-collector carrier foil 12 with a plurality of openings 20 which each extend over the entire thickness of the anode-collector carrier foil 12, ie from the first main surface 14 to the second main surface 16
  • openings 20 there can also be a number of openings 20 that differ from the embodiment shown in FIG. 2, as long as at least one opening 20 for the passage of electrolyte through the anode-collector carrier foil 12 is present.
  • the anode 10 has a particulate auxiliary material 22 which is at least partially arranged in the openings 20 .
  • the particulate auxiliary material 22 is selected from the group consisting of lithium ion conductors, Al2O3, T1O2, B2O3, boehmite, artificial diamond dust and combinations thereof and has an average particle size D50 in the order of the thickness of the anode-collector carrier foil 12 and a Mohs hardness in the range from 2 to 10, in particular a Mohs hardness in the range from greater than 3 to 10, for example 3.2 to 10.
  • the openings 20 allow electrolyte to pass through from the first main surface 14 in the direction of the second main surface 16 and from the second main surface 16 in the direction of the first main surface 14, so that the anode can be wetted with electrolyte more quickly and more evenly, as shown in FIG This is the case with the prior art anode 10 as shown in FIG.
  • the anode-collector carrier foil 12 is provided (cf. step S1 in Fig. 3), the anode-collector carrier foil 12 corresponding to that from Fig. 1, i.e. no openings 20 (cf. Fig. 2) having.
  • a coating compound is then applied to the first main surface 14 of the anode-collector carrier foil 12 (cf. step S2 in FIG. 3 and FIG. 4).
  • the application of the coating mass takes place in the illustrated embodiment by applying a total mass 24 the first main surface 14, the total mass 24 comprising the coating mass and an active material coating mass.
  • the coating composition includes the particulate auxiliary material 22 and a binder that is not shown in detail.
  • the binder is selected from the group consisting of styrene-butadiene rubber (SBR), polyvinylpyrrolidone (PVP), polyamide (PA), polyvinylidene fluoride (PVdF), polyvinylidene fluoride-hexafluoropropylene (PVdF-HFP), polyacrylate, carboxymethyl cellulose (CMC), Polyimide (PI), PTFE and combinations thereof.
  • the coating composition can contain an additive that is selected from the group consisting of synthetic graphite, natural graphite, carbon nanotubes, carbon fibers, soft carbon, hard carbon and combinations thereof.
  • the addition can increase the conductivity of the coating composition and improve its processability and/or applicability.
  • the active material coating composition includes the anode active material 18 and an active material binder or electrode binder, which is not shown in detail.
  • the particulate auxiliary material 22 settles due to gravity, so that it is directly adjacent to the anode-collector carrier foil 12, as shown in FIG.
  • the coating compound with the particulate auxiliary material 22 and the active material coating compound can also be applied individually one after the other to the anode-collector carrier film 12 .
  • the coating mass, the active material coating mass and/or the total mass 24 can be applied to the anode-collector carrier film 12 by means of wet coating, dry coating, pressing, laminating, lining, extruding and/or spraying.
  • the coating mass As shown in FIG. 4 , only an active material coating compound is applied to the second main surface 16 .
  • a total mass 24 or a coating mass could also be used on the second main surface 16 .
  • the coating mass more precisely the total mass 24 in the embodiment shown, is compacted to form the anode film 19 (cf. FIG. 2), for example by means of calenders (cf. step S3 in FIG. 3).
  • a force F is exerted on the total mass 24, as indicated by an arrow in Fig.
  • the method of the invention makes it possible to create the openings 20, which can be used to improve wetting, in situ during the manufacture of the anode 10.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une anode (10) pour une batterie lithium-ion, comprenant les étapes suivantes : on prend une feuille support de collecteur d'anode (12) et on applique une matière de revêtement qui contient un matériau auxiliaire particulaire (22) sur au moins une surface principale (14, 16) de la feuille support de collecteur d'anode (12) ; on comprime ensuite la matière de revêtement sur la feuille support de collecteur d'anode (12) de sorte que l'on forme un film cathodique, la feuille support de collecteur d'anode (12) étant perforée lors de la compression de la matière de revêtement. L'invention concerne en outre une batterie lithium-ion.
EP22706770.9A 2021-02-15 2022-02-11 Procédé de fabrication d'une anode pour une batterie lithium-ion et batterie lithium-ion Pending EP4292149A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021103508.2A DE102021103508A1 (de) 2021-02-15 2021-02-15 Verfahren zum Herstellen einer Anode für eine Lithiumionenbatterie sowie Lithiumionenbatterie
PCT/EP2022/053381 WO2022171803A1 (fr) 2021-02-15 2022-02-11 Procédé de fabrication d'une anode pour une batterie lithium-ion et batterie lithium-ion

Publications (1)

Publication Number Publication Date
EP4292149A1 true EP4292149A1 (fr) 2023-12-20

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US (1) US12406977B2 (fr)
EP (1) EP4292149A1 (fr)
CN (1) CN116830284A (fr)
DE (1) DE102021103508A1 (fr)
WO (1) WO2022171803A1 (fr)

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CN115799520B (zh) * 2022-10-24 2025-06-20 长沙新立硅材料科技有限公司 一种锂电池新型集流体的制备方法

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US3642538A (en) * 1969-10-31 1972-02-15 Zito Co Metal halide battery
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US12406977B2 (en) 2025-09-02
CN116830284A (zh) 2023-09-29

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