WO2020249750A1 - Électrode pour une batterie lithium ainsi que procédé pour la fabrication de celle-ci - Google Patents

Électrode pour une batterie lithium ainsi que procédé pour la fabrication de celle-ci Download PDF

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Publication number
WO2020249750A1
WO2020249750A1 PCT/EP2020/066334 EP2020066334W WO2020249750A1 WO 2020249750 A1 WO2020249750 A1 WO 2020249750A1 EP 2020066334 W EP2020066334 W EP 2020066334W WO 2020249750 A1 WO2020249750 A1 WO 2020249750A1
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WIPO (PCT)
Prior art keywords
electrode
lithium
layer
filaments
nano
Prior art date
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PCT/EP2020/066334
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German (de)
English (en)
Inventor
Kenneth B.K. Teo
Bernd Schineller
Original Assignee
Aixtron Se
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Publication date
Application filed by Aixtron Se filed Critical Aixtron Se
Publication of WO2020249750A1 publication Critical patent/WO2020249750A1/fr

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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
    • H01M4/62—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M4/0421—Methods of deposition of the material involving vapour deposition
    • H01M4/0428—Chemical vapour deposition
    • 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
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • 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
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
    • 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
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8828—Coating with slurry or ink
    • 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
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
    • H01M4/8882—Heat treatment, e.g. drying, baking
    • H01M4/8885—Sintering or firing
    • 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
    • H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • 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
    • H01M4/75—Wires, rods or strips
    • 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
    • H01M4/80—Porous plates, e.g. sintered carriers
    • H01M4/806—Nonwoven fibrous fabric containing only fibres
    • 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
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the invention relates to an electrode or a lithium-ion accumulator and a method for producing the electrode or a lithium-ion accumulator.
  • the electrode has an electrically conductive one
  • Nano-filaments are applied to the carrier or the catalytic coating. Several of the nano-filaments are combined into bundles. The bundles are provided with an ion-absorbing coating, which coating can have nanoparticles.
  • US 2013/0244107 A1 describes an electrode for a lithium-ion accumulator.
  • a silicon layer is applied to a carbon filament and is coated with a "Power Enhancement Material”.
  • the PE contains "Surface Effect Dominant Sites”. These SEDS are arranged in a matrix made of a conductive polymer.
  • DE 10 2016 118404 A1 describes an electrode for a lithium-ion accumulator.
  • the nano-filaments applied to the surface of the carrier are formed into bundles by exposure to light using a laser. Alternative techniques are known for reshaping the filaments into bundles, for example this can be done by wetting.
  • Methods for manufacturing electrodes or for depositing carbon nanotubes CNT are also described in WO 2017/034 650 A3, WO 2017/221 645 Al, US 2018/0 151 881 Al, US 9,917,298 B2 and KR 10-2017-0111 746.
  • the electrode described in DE 10 2016 118404 A1 is in a
  • Lithium-ion battery used which has volumes that are filled with an electrolyte.
  • the electrolyte is lithium ions in an aqueous solution.
  • a solid electrolyte layer solid electronic interface
  • This SEI is formed on the coating that is formed by nanoparticles, the nanoparticles being connected to the nano-filaments by sintering and in particular by exposure to temperature.
  • the SEI forms directly on the highly structured surfaces of the occupancy. With such electrodes, due to mechanical tension, nanoparticles can come loose from the coating.
  • This pulverized material, in particular made of silicon, then enters the liquid electrolyte phase.
  • the expansion in volume of the occupancy during the charge-discharge cycles can also lead to breaks in the solid electrolyte layer. This leads to a reduction in the battery capacity.
  • the invention is based on the object of taking measures to increase the number of charge-discharge cycles in a known lithium-ion accumulator.
  • the coating which is applied directly to the bundle and which in particular can contain nanoparticles such as silicon, is provided with a protective layer.
  • the protective layer can consist of a substance that contains carbon.
  • the substance of the protective layer can contain graphite or another organic substance. It is provided in particular that the protective layer contains PEDOT or polypyrrole.
  • the protective layer can contain a combination of several coating materials. With such a protective layer, the mechanical stability of the structures formed by the bundles is increased. In particular, it is avoided that parts of the occupancy and in particular the nanoparticles contained in the occupancy are detached from the occupancy.
  • the nanoparticles, for example silicon particles, which break off from the coating do not get into the liquid electrolyte phase as a result of the protective layer.
  • the night-time effects of shear forces which occur during the charge-discharge cycles and which are caused by a change in volume of the occupancy are reduced with the measures according to the invention.
  • the nanoparticles are separated from the liquid electrolyte by a layer or a layer system.
  • the layer system can form a diffusion path through which ions can diffuse.
  • the protective layer is applied to the bundle only in such a small material thickness that gaps remain between adjacent bundles.
  • these interspaces be filled with a filling.
  • the covering can be applied using a CVD process or an FVD process.
  • the covering, the protective layer or the filling can be from a layer system which comprises several layers, be constructed. However, it is also provided that only a single layer is applied instead of a layer structure, it being provided in particular that this layer is knife-coated, sprayed on or applied in some other way. This layer or such a layer system forms a spatial separation between the nanoparticles and the liquid phase in the accumulator.
  • the device for applying the covering and the device for applying the protective layer can be spatially immediately adjacent, so that an endless substrate, which forms the carrier, is first provided with nano-filaments, and then treated in such a way that the nano-filaments are bundled this bundle is then applied to the occupancy. This is done by applying nanoparticles to the bundled filaments. The nanoparticles are then sintered with the nano-filaments, the nanoparticles are exposed to temperature. This can be done by means of a laser or another suitable device, for example an IR radiation source. The protective layer is then applied to the covering.
  • the protective layer consists in particular of an organic material.
  • the protective layer can, however, also consist of an inorganic material. It can contain organic material and / or inorganic material. The protective layer can also contain other organic coating materials.
  • the spaces between adjacent bundles each provided with a protective layer are filled with a filling. This is done, for example, by means of a CVD process or a PVD process.
  • the layer with which the spaces between adjacent bundles are filled can contain carbon, in particular in the form of graphite or soot. With this filling, the surface is effectively leveled. The area of the electrode that comes into contact with the liquid electrolyte phase is, as a consequence of the invention, minimized according to the procedure.
  • the filling can also be applied to the protective layer in the form of an aqueous, sludge-like solution. It is provided in particular that a dispersion or a suspension is used for this purpose.
  • the filling in particular, containing carbon, creates a surface that can run parallel to the surface of the carrier to which the nano-filaments have been applied.
  • SEI solid electrolyte
  • the lithium ions can diffuse through the, in particular, carbon-containing filling and through the protective layer, so to speak, encapsulated by the joint, and through the protective layer to the silicon coating of the nano-filaments.
  • the joint has sufficient porosity.
  • the filling contains graphite particles.
  • the protective layer covers the silicon that of at least one
  • Carbon nanofuament is worn.
  • the silicon preferably forms a silicon coating of a bundle of the carbon nanofilaments.
  • the silicon layer is covered with a protective layer.
  • the protective layer is formed from a conductive polymer, preferably PEDOT.
  • the protective layer has an ionic conductivity for lithium ions of> 10 -7 S / cm.
  • the electrical conductivity of the protective layer is preferably ⁇ 4 mS / cm.
  • the protective layer thus preferably has a low specific ionic resistance, but a high specific electrical resistance.
  • the protective layer is designed so that the electrolyte, through which the lithium ions can move during the charge cycle or discharge cycle, cannot reach the silicon through the protective layer.
  • the conductive polymer from which the protective layer can consist can be selected from the list of polyacrylic acid, polymethylacrylate, etc.
  • the protective layer can also be a graphene layer.
  • the protective layer is preferred tends to be so elastic that it can deform when the volume of the silicon coating expands when lithium migrates into the silicon.
  • the following materials can be used to form the protective layer:
  • PEDOT PSS (poly-3,4-ethylenedioxythiophene: polyelectrolyte sodium polystyrene sulfonate), electrically conductive per se, conductivities of approx. 0.1-2 mS / cm, possibly with an offset of solvents up to 500 S / cm.
  • Spiro connections (more of a class of material), e.g. Spiro-MeOTAD
  • PAA Polyacrylic acid
  • PVDF Polyvinyl chloride
  • Carbon / graphene which is more inorganic, also seems to have the desired properties.
  • the invention also relates to a device for carrying out the method, as it is basically prepared in DE 102016 118404 A1. is written.
  • the device has a housing in which several processing stations can be located. With a first processing station, a conductive coating can be applied to an endless carrier of a catalytic electrode that has been withdrawn from a roll. With a first processing station, a catalytic coating can be applied to a conductive endless carrier pulled from a roll. In a further processing station, a large number of carbon nanotubes can be deposited on the surface of the carrier prepared in this way. These are then formed into bundles in a further coating station.
  • the device has a processing station in which the bundles covered with nanoparticles are provided with a protective layer. It is a thin protective layer that maintains the outline contour of the bundle so that the free spaces created between the individual bundles coated in this way are preserved.
  • the free space between the bundles is filled with a filler in an optional further processing station.
  • the carrier coated in this way is then rolled up on a further roll. If one of the layers is applied using a wet process, a drying station can be provided in which the layer applied using a wet process is dried.
  • the device also includes upstream processing stations in which the filaments and the nanoparticles are applied and sintering is carried out.
  • the electrode preferably has a copper substrate, which can be uncoated or coated.
  • the carbon nanotube bundles, which are at least partially coated with silicon, are applied to the coating or directly to the copper substrate. Between the bundles, which are coated with an organic layer, there are free spaces which are filled with a material, which is graphite contains. Roll material is used as the substrate.
  • the product is a rolled up electrode.
  • Fig. 1 shows a substrate in the form of a carrier 1, which is a catalytic
  • Nano-filaments in the form of carbon nanotubes (CNT) have been deposited,
  • Nanoparticles 5 have been applied.
  • Electrolyte layer (SEI) is designated, which is formed between the essentially flat surface of the filling 9 and the liquid electrolyte 11,
  • FIG. 10 schematically shows a device for carrying out the method.
  • FIG. 9 shows an accumulator cell 15 of a silicon-ion accumulator.
  • the accumulator cell 15 has two electrodes 12, 12 ', one of which is an anode and the other is a cathode. At least one of the two electrodes 12, 12 'can be formed by a carrier 1, 1', on which a heterogeneous coating is applied in the manner described below, which can have a filling 9.
  • an endless substrate which forms a carrier 1 is conveyed through a coating system having a plurality of coating stations, as is described in DE 102016 118404 A1.
  • Various coating stations 19-25 are provided one behind the other in the coating system, with which nano-filaments 3 are initially applied in the following sequence a catalytic coating 2 of the carrier 1 can be applied, the nano-filaments 3 are reshaped into bundles 4, the bundles 4 are provided with nanoparticles 5, the nanoparticles 5 are sintered to form a covering 6, on which the covering 6 a protective layer 7 is applied in such a way that free spaces 8 remain between the bundles 4, the free spaces 8 are filled with a filling 9, so that a surface 9 ′ that runs essentially parallel to the surface of the carrier is formed.
  • a solid electrolyte layer 10 can then form on this surface 9 'of the filling 9 during the charge-discharge cycles of the accumulator cell 15.
  • the accumulator cell 15 has two volumes 14, 14 'which are separated from one another by a porous wall 13. Lithium ions can diffuse through this porous wall 13 in order to get through the filling 9 to the coating 6.
  • the invention can also be used in differently designed accumulator cells, for example in solid-state batteries. No porous wall is used there.
  • the electrolyte is itself a solid that electrically isolates the two electrodes from each other and transports the ions.
  • a large number of nano-filaments 3 are applied to a substrate which is provided with a catalytic coating 2 according to FIG.
  • FIG. 10 which has a housing 18 in which a multiplicity of processing stations 19-25 are arranged, through which an endless substrate 1, withdrawn from a reel 16, 16 ', is transported and placed on a reel 16, 16' is rewound, these two method steps are carried out in the processing stations 19 and 20.
  • the method step shown in FIG. 3 is carried out in the processing station 21.
  • the nano-filaments 3 are combined into bundles either by exposure to light, by wetting or another suitable method.
  • the vertical height of the nano-filaments can be between 10 and 200 mm.
  • the vertical height is preferably approximately 50 mm.
  • a CVD process is used to deposit the nano-filaments 3.
  • nanoparticles 5, in particular Si nanoparticles are applied to the nano-filaments bundled in this way. This can be done with a suspension that contains silicon nanoparticles and an organic solvent or water. The nanoparticles 5 can, however, also be sprayed onto the nano-filaments. It can further be provided that the substrate prepared according to FIG. 3 is immersed in a solution which contains the nanoparticles. It is also possible to squeegee a suspension of nanoparticles onto the layer prepared according to FIG. 3.
  • FIG. 5 shows a further process step in which the nanoparticles 5 are mechanically bound to the nanofilaments 3. This can be done by a sintering process. This takes place in the processing station 23. This forms an occupancy (6). It is also conceivable for this purpose to optically heat the nanoparticles 5, which can be done by means of a laser.
  • the protective layer denoted by the reference number 7 in FIG. 6 can be applied.
  • the protective layer 7 can, however, also be deposited in a subsequent coating process. It can also be provided that the coating 6 containing silicon nanoparticles may contain borrowed lithium ions.
  • the processing station 24 is used in the device shown in FIG.
  • the protective layer 7 is produced in the same method step in which the silicon nanoparticles are applied to the bundle 4.
  • the protective layer can thus be part of the occupancy.
  • the intermediate product produced in accordance with FIG. 7 is then dried. However, drying can also take place before the protective layer 7 is applied, for example after the nanoparticles 4 have been applied, if this is done using a suspension. After drying, the nanoparticles 5 can be mechanically bound to one another. Such a sintering process can, for example, be carried out using a laser.
  • the above-mentioned additional introduction of lithium atoms or lithium ions into the covering 6 can be carried out before the unification or after the unification.
  • An essential element of the invention is the application of an in particular organic layer 7, shown in FIG. 6, which fulfills the function of a protective layer.
  • This protective layer 7 can be sprayed on.
  • the layer can, however, also be produced by dipping, in which the intermediate product shown in FIG. 5 is dipped into a solution or suspension.
  • the protective layer 7 can, however, also be doctored on.
  • a carbon coating or a graphite coating is used upset.
  • This coating forms a filling 9 which can have graphite, organic or inorganic binders, carbon black or any combination of such constituents. This is carried out in the processing station 25.
  • the filling 9 fills the spaces 8 between the with a
  • Protective layer 7 provided bundle 4 from. It can be provided that for this purpose a sludge-like mass is knife-coated over the bundles 4 provided with the protective layer 7.
  • the filling 8 preferably has a material thickness which is only slightly greater than the height of the bundles extending in the direction of the normal to the surface of the carrier 1.
  • the free surface of the filling 9 is preferably a plane which extends parallel to the plane of the carrier 1. As a result, the heterogeneous structure with which the carrier 1 is coated is given a smooth surface.
  • the surface 9 ′ of the filling 9 serves to deposit a solid electrolyte layer 10.
  • the bundles 4 consist of a multiplicity of individual nanofilaments 3, which are connected to the carrier 1 or the coating 2 in an electrically conductive manner. They thus have a fixed end connected to the coating 2 and a free end pointing away from the coating 2. Those with sulfur particles 5 are carried by the nanofilaments 3. You can the
  • the bundles 4 are covered with the protective layer 7 like a hood.
  • the spaces 8 between these hood-like protective layers 7 are filled with a filling 9 made of a material through which lithium ions can diffuse.
  • the lithium ions can get from the liquid electrolyte phase 11 through the filling 9 and the protective layer 7 into the silicon layer 5.
  • the protective layer 7 is designed so that the electrical lyt of the electrolyte phase 11 cannot pass through the protective layer 7 into the silicon layer 5.
  • the invention also relates to a device for carrying out the method, which is characterized in that a station for applying the covering 6 is adjacent to a coating station for applying the protective layer 7.
  • the device also has a station for applying the filling 9.
  • FIG. 10 shows schematically a related device with several processing stations 19, 20, 21, 22, 23, 24, 25, in which the manufacturing steps described above can be carried out one after the other on an endless substrate. All processing stations 19-25 can be arranged in a common housing. FIG. 10 shows only the essential processing stations. Further processing stations can be provided between the individual processing stations 19-25, for example in order to be able to carry out the drying processes described above.
  • a device such as the processing stations 19-23 is already described in DE 10 2016 118404 A1, which is why the content of this document is fully integrated into the content of this description, also in order to derive features for delimiting the claims.
  • the processing station 24 can be a CVD reactor or an FVD
  • the processing station 25 can be a similarly designed processing station. It can be a CVD reactor, an FVD Act reactor or the like. With this processing device, the spaces 8 between two adjacent bundles are filled with a filling 9.
  • the processing station can be a dip coating device, a spray coating device or a device with which a dispensing can be knife-coated onto the electrode.
  • a method which is characterized in that the layer (7) has an ionic conductivity for Li + ions.
  • An electrode or a lithium-ion accumulator which is characterized in that the layer (7, 9) has an ionic conductivity for Li + ions.
  • a method, an electrode, a lithium-ion accumulator which is characterized in that the protective layer 7 consists of a substance containing carbon, contains graphite, an organic substance and / or PEDOT or polypyrrole or a combination of several coatings. contains substances.
  • a method, an electrode, a lithium-ion accumulator characterized by a surface of the filling 9 that runs parallel to the carrier 1 and on which a solid electrolyte layer 10 can form, which adjoins a liquid electrolyte phase 11.
  • a method, an electrode, a lithium-ion accumulator which are characterized in that the bundles 4 are or are generated by exposure to light or by wetting and / or that a cross-sectional path through a bundle 4 filled area of the surface of the carrier has a length of 0.5-30 mm or 0.5-5 mm.
  • a device which is characterized in that the device has at least one processing station 24, with which the bundled nano-filaments 3 provided with nanoparticles 5 are provided with a protective layer 7.

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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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne un procédé pour fabriquer une électrode ou une batterie lithium-ion ainsi qu'une électrode de ce type. L'électrode (12, 12') possède un support électro-conducteur (1) sur la surface duquel sont disposés des nanofilaments (2) mis en faisceaux. Un enrobage (6) absorbant les ions est pourvu selon l'invention d'une couche protectrice (7) élastique. Des espaces intermédiaires entre les faisceaux (4) sont remplis d'une charge constituée de graphite. La couche protectrice (7) est perméable aux lions Li+ mais imperméable à un électrolyte.
PCT/EP2020/066334 2019-06-12 2020-06-12 Électrode pour une batterie lithium ainsi que procédé pour la fabrication de celle-ci WO2020249750A1 (fr)

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DE102019115919.9A DE102019115919A1 (de) 2019-06-12 2019-06-12 Elektrode für einen Lithium-Ionen-Akkumulator sowie Verfahren zu dessen Herstellung
DE102019115919.9 2019-06-12

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WO2020249750A1 true WO2020249750A1 (fr) 2020-12-17

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DE102020126859A1 (de) 2020-10-13 2022-04-14 Aixtron Se Verfahren zur Fertigung einer Elektrode für einen Lithium-Ionen-Akkumulator und nach dem Verfahren gefertigte Elektrode

Citations (8)

* Cited by examiner, † Cited by third party
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