EP4076773A1 - Procédé et appareil pour orienter des particules dans une pâte - Google Patents

Procédé et appareil pour orienter des particules dans une pâte

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Publication number
EP4076773A1
EP4076773A1 EP20833741.0A EP20833741A EP4076773A1 EP 4076773 A1 EP4076773 A1 EP 4076773A1 EP 20833741 A EP20833741 A EP 20833741A EP 4076773 A1 EP4076773 A1 EP 4076773A1
Authority
EP
European Patent Office
Prior art keywords
paste
particles
force field
chamber
drying rate
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
EP20833741.0A
Other languages
German (de)
English (en)
Inventor
Max KORY
Deniz BOZYIGIT
Martin Ebner
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.)
Battrion AG
Original Assignee
Battrion 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 Battrion AG filed Critical Battrion AG
Publication of EP4076773A1 publication Critical patent/EP4076773A1/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
    • 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
    • H01M4/13—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
    • 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
    • H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
    • 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
    • H01M4/133—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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • 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
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • 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
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/20—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields
    • B05D3/207—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields post-treatment by magnetic fields
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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 and a device for aligning particles in a paste and also to a method for producing the coating of a carrier, in particular in the production of graphite-coated electrodes for lithium-ion batteries.
  • Such methods in which particles are aligned in a paste, are used, for example, in the production of negative electrodes for fast-charging lithium-ion batteries.
  • Such an alignment can be brought about, for example, by applying magnetic fields to the layer of the corresponding paste applied to the carrier, as is described, for example, in WO 2018/047054 A1.
  • the object of the invention is to be able to improve processes, in particular production and coating processes, which provide the alignment of such particles in a paste as a process step, with regard to costs and productivity.
  • the object is achieved by the features of claim 1, by the characterizing features of claim 8 and by the features of claim 9.
  • the invention solves this problem of being able to meet the constantly growing requirements with regard to costs and productivity by further developing such a method for aligning the particles in the paste in such a way that it can be converted into a continuous process, such as a roll-to-roll Process can be integrated.
  • the method according to the invention can be used for aligning different types of particles in a paste.
  • the method can be used, for example, as part of a process for the production of lithium-ion batteries, more precisely for the production of electrodes (for the electrochemical cells used here: negative electrodes).
  • the anode comprises a graphite layer into which lithium ions intercalate.
  • this arrangement releases electrons which flow to the cathode via the external circuit that is to be fed by the cell.
  • lithium cations migrate from the intercalation layer through the cell's electrolyte to the cathode.
  • the process is reversed, whereby the lithium cations have to migrate from the cathode back towards the anode.
  • the layer-like structure of the graphite used is composed of graphite particles, which are often in the form of platelets. After the graphite layers have been applied, the graphite particles are usually aligned parallel to the surface on which they were applied. When the lithium cations migrate through this layer, the lithium ions have to migrate around these platelets, which leads to confused pore passages and comparatively long path lengths when the lithium ions diffuse. That is why it has been found to be advantageous to align the graphite particles:
  • the platelet-shaped particles are aligned with their longitudinal axis, which is present along the longer side of the platelets, as perpendicular as possible to the surface of the carrier.
  • the alignment can advantageously take place in such a way that the platelets are arranged or lined up in a direction perpendicular to the surface of the anode as far as possible.
  • the path lengths can be significantly shortened when the lithium ions migrate. This has an advantageous effect, in particular, in that the charging process can be shortened very much in terms of time by this measure, because the ions take less time to diffuse and thus the cell also needs less time to charge.
  • the performance of the battery can also be significantly improved, since the corresponding charge carriers have to cover shorter distances during the discharge process and can migrate more quickly. In addition, it has been found that this measure also improves the service life of the batteries in practice.
  • the invention can also be used for other applications in which other particles are to be aligned in a paste.
  • it can also be other magnetically influenceable particles, such as magnetic nanoparticles or particles such as alumina or boron nitride, which are coupled with magnetically influenceable particles.
  • the method according to the invention for aligning particles in the corresponding paste initially comprises providing the paste with the alignable particles located therein.
  • the paste can be, for example, carbon-based particles, such as graphite.
  • the paste can comprise a volatile substance.
  • an aqueous suspension of graphite particles is mixed with CMC (carboxymethyl cellulose) and then an SBR binder (styrene-butadiene-rubber-latex binder) is added.
  • the CMC ensures that graphite particles are well dispersed in the water; on the other hand, the CMC chains ensure that the resulting suspension forms the basis for a stable viscose paste that has little sedimentation and at the same time is thin enough at high shear rates to to be able to be applied bubble-free on a surface (e.g. with a slot nozzle).
  • the SBR binder ensures that the applied coating adheres to the carrier film and that the coating has sufficient elasticity.
  • water is used as the volatile substance. The water content can basically evaporate out of the paste, especially when the ambient temperature of the paste is increased.
  • the method according to the invention is now characterized in that the paste is heated in order to at least temporarily reduce the viscosity of the paste and to reduce the alignment time required to align the particles in the force field. Accordingly, the paste is heated before or while it is placed under the influence of the force field. If the paste is already heated before it is exposed to the force field, this measure can have the advantage that the viscosity in the preheated paste is already reduced when the particles begin to be aligned. The higher the viscosity, the more viscous the environment of the particles and the more time is required for the particles to align themselves with the force field. In addition to the temperature, the viscosity also depends on the solids content of the paste.
  • the alignment step can also be integrated into an assembly line or into a roll-to-roll process. Time can be saved, productivity can be increased and thus, in particular, costs can also be reduced. In addition, higher degrees of alignment of the particles in the paste can be achieved because the particles can be rotated more easily by a force field in the low-viscosity environment.
  • the paste can also be heated for other technical purposes.
  • the heating of the paste can also be used to dry the paste, which in particular can also result in the particles in the paste also remaining in this position after their alignment.
  • the paste can therefore also be heated under the influence of the force field after the paste has been exposed. If the paste is dried, its viscosity is in principle also increased again, ie the particles are increasingly immobilized and ultimately remain in the position into which they were rotated during the alignment.
  • the volatile substance usually escapes during heating or drying. In this context, it is important to note which effect is produced in connection with the heating of the paste and under which conditions this effect can be achieved.
  • the warming itself basically leads to a reduction in viscosity.
  • the heating of the paste can also be used to reduce the volatile portion in the paste and / or to increase the viscosity of the paste again after the temporary reduction in viscosity, in particular to increase the mobility of the particles in the paste to reduce.
  • a rapid drying process that follows the alignment of the particles can also help ensure that the subsequent part of the production process can also be continued continuously.
  • the drying rate of the paste can be fixed or adjusted.
  • a range of the drying rate between 0-50 mg / (cm 2 x min), in particular between 0-30 mg / (cm 2 x min), preferably between 0-16 mg / (cm 2 x min) provides practicable values.
  • the paste spread out on a carrier has a large surface area, which in principle already favors the escape of the volatile substance from the paste. Accordingly, this generally leads to an increase in viscosity.
  • the drying of the paste is generally only desired when the particles in the paste are already aligned. Prior to this, drying of this kind would mean that particles could only be aligned more difficultly and time-consuming (if at all) due to the increased viscosity in the paste. For this reason it can be an advantage to adjust the drying rate accordingly.
  • the drying rate can be reduced accordingly before or during the alignment.
  • One possibility for adapting the drying rate to an increased ambient temperature is to expose the paste, for example, to increased ambient humidity. If the vapor pressure in the environment is higher, less volatile material (e.g. water) escapes from the paste into the ambient air.
  • the volatile substance can be brought into the vicinity of the paste in an increased concentration in order to prevent it from increasingly escaping from the paste as a result of the higher temperature.
  • the volatile substance can, for example, be evaporated and brought into the vicinity of the paste, whereby the ambient air humidity can originate from the paste with the volatile substance itself.
  • the adjustment of the drying rate can thus be carried out, for example, by means of steam, via a nozzle, via other types of atomization, etc.
  • the paste can be exposed to a specific drying rate, which is adapted accordingly, before, during or after the heating.
  • a specific drying rate which is adapted accordingly, before, during or after the heating.
  • the drying rate can be adjusted both before, during or after exposure of the paste under the influence of the force field.
  • the choice of the measure essentially depends on how the alignment of the particles is triggered over the course of time, on the one hand, and the on the other hand The drying process of the paste must be timed.
  • drying does not start too late in a manufacturing process, otherwise embedding in the continuous process would be difficult due to the delay and too late immobilization of the aligned particles, especially in the course of the continuation of the manufacturing process, could lead to a Part of the particle in turn loses its alignment.
  • the paste can be brought into a chamber which ensures that the surrounding volume is limited in order to be able to adjust the drying rate more easily. If, for example, the drying rate is adjusted by adjusting the ambient air humidity, this only needs to be set accordingly within the chamber. This also has the advantage that the drying rate can be adjusted comparatively homogeneously in the surrounding volume, and thus also in relation to the route over which the paste is transported through the chamber.
  • water vapor can be used, for example, which is generated by heating or is brought into the environment via a nozzle by atomization.
  • the ambient air humidity can also be adjusted by bringing a certain saturated salt solution into the chamber, which ensures that the ambient air humidity receives a certain constant value after a certain time.
  • the level of humidity depends in particular on the choice of saline solution. It is also conceivable to adjust the drying rate by increasing the pressure. This can also take place in an advantageous manner in a chamber.
  • a suspension can in particular be used as the starting material as a paste can be used, in particular an aqueous suspension, i.e. a mixture of liquid and solid components.
  • the liquid component or a part thereof, for example water, can then be the volatility component.
  • the method according to the invention or one of the exemplary embodiments can in particular be used to produce coatings on a carrier, preferably in the production of graphite-coated anodes for lithium-ion batteries, after the paste has been applied to the coated carrier.
  • productivity can thus be improved and costs can be reduced if the invention allows a corresponding method step for alignment to be integrated into a continuous method such as a roll-to-roll method, for example.
  • a corresponding device for aligning particles in a paste according to the invention thus comprises at least one power source to expose the paste to a force field so that the particles experience a force through the interaction with the force field, by which they can be aligned relative to the field lines and furthermore a heating device.
  • This can be, for example, an infrared lamp, a heating fan, heated rollers that are used to transport the carrier, an inductive heat source, a microwave or even hot water vapor.
  • hot water vapor advantageously enables the active medium, provided it is water, to also be supplied, that is to say, in addition to the heating, it is also ensured that the drying rate remains comparatively low.
  • the heating device is arranged in relation to the power source or is controllable in such a way that the paste before exposure or during exposure of the paste under the influence of the Force field is heated
  • the force field can be a magnetic field so that, for example, magnetically anisotropic graphite particles can align themselves accordingly.
  • the magnetic field that is generated can be changeable in terms of location or time. In the case of diamagnetic graphite particles, this favors alignment over a transport route.
  • fields that can be changed in terms of time or location can be generated by stringing together permanent magnets in so-called boards so that the field strength is increased compared to a single permanent magnet and arranged in such a way that the field lines correspond to the desired Correspond to the course of the field.
  • Permanent magnets can usually be purchased relatively cheaply. They can be put together like rods in simple guides, and by their orientation or arrangement of the rods, in turn, a locally changing field can be generated.
  • the boards are usually at least as wide as the width of the transport route, so that there is a homogeneous field across the carrier across the transport direction. If a sample is passed over such a locally changeable alternating field, a temporally changing magnetic field is created for a specific point on the sample / carrier when the sample is transported over the locally changed magnetic field.
  • the use of permanent magnets can save costs, especially electricity costs (in contrast, for example, to an electrical generation of a magnetic field, for example by means of a coil arrangement).
  • the method according to the invention and the device according to the invention favor above all that the sample or the Carrier is transported from one production step to the next, so it can be embedded in a continuous production process.
  • the carrier with the paste applied thereon can be guided over rollers over the force field source, over the locally variable field, so that from the point of view of the paste there is a temporally variable field. This facilitates the integration of the steps into a manufacturing process and enables time to be saved.
  • the heating process with which the viscosity of the paste is initially reduced to make it easier to align the particles, can be carried out using a heating device.
  • This in turn can also be arranged or controlled in such a way that the paste continues to be heated even after the particles have been aligned in the force field in order to dry the paste. This enables the particles to be immobilized, i.e. it prevents the aligned particles from losing their orientation.
  • the chamber can be designed as a humidity chamber with a humidity source in order to generate a certain drying rate and to reduce the evaporation of the volatile substances from the paste, the humidity chamber being arranged so that the paste is at least temporarily transported through the transport device is transported through the chamber.
  • Adjusting the drying rate can basically counteract the effect that the paste loses the volatile substance as a component as a result of the heating. If the drying of the paste is counteracted, this promotes the mobility of the particles in order to be able to align them. Will drying reinforced, this basically favors the immobilization of the particles. Depending on which effect is desired, the drying rate can thus be adjusted before, during and / or after exposure to the paste under the influence of the force field or before, during and / or after the paste is heated. This measure also facilitates integration into a manufacturing process and increases productivity; because the faster the particles are aligned and then immobilized, the easier it is to implement them in continuous production.
  • the drying rate or parameters which influence the drying rate can be influenced by a control device.
  • Control basically means controlling and / or regulating.
  • the control device can use various sensors, for example corresponding temperature sensors, hygrometers, pressure measuring devices (barometers) or the like, in order to be able to measure the environmental properties around the paste or also in the paste. In this way, a particularly constant regulation can take place, so that the samples can be produced with constant quality.
  • the control device can also be designed to completely switch off individual devices such as air humidity sources, heating devices or parts of the force field source.
  • the humidity chamber can optionally also be divided into different zones. For this purpose, it may be advisable to undertake a division into sub-chambers, the transport device in particular guiding the paste or the carrier coated with the paste through the corresponding sub-chambers one after the other. This also makes it conceivable that To be able to adjust the alignment and drying of the paste in a more targeted manner.
  • the first sub-chamber can be heated with a simultaneous reduction in the drying rate, either by increasing the pressure or by increasing the air humidity. These conditions are maintained as long as the particles are aligned. Subsequently, when the particles are aligned, drying should take place as quickly as possible in order to fix the alignment of the particles or to immobilize the particles so that the carrier with the coating or the paste can immediately be processed further, for example pressed.
  • the chamber or at least one of the sub-chambers can also be filled or flooded with a gas, in particular a gas other than air. If necessary, the escape of a volatile substance from the paste can thereby be influenced, in particular reduced.
  • the drying rate of the volatile component in the chamber or at least one of the sub-chambers can be reduced by reducing the temperature of the gas located above the paste, since basically the lower temperature of the gas results in less absorption of the volatile substance from the paste in the overlying gas leads.
  • Fig. 1 a schematic representation of a device for aligning particles like the invention
  • Fig. 2 Another device for aligning particles like the invention, which provides an adjustment of the humidity with control, and
  • Fig. 3 a device for aligning particles like the invention, which provides an adaptation of the air humidity with control, but a corresponding section of the production line is divided into individual zones or sub-chambers with individual control.
  • FIG. 1 shows a schematic representation of a device 1 for aligning particles in a paste according to a basic structure.
  • This device 1 comprises a transport device 2 for roll-to-roll transport.
  • a carrier 3 which is coated with the paste is transported over these rollers 2.
  • the transport device 2 already shows that the method step shown here can be embedded as part of a continuous production process and the carrier that is to be processed is guided from processing station to processing station.
  • the coated carrier is temporarily introduced into a chamber 4 via the transport device 2 so that the carrier 3 is exposed within this chamber 4 to certain environmental properties (eg a certain humidity, a certain pressure or the like).
  • the carrier 3 is exposed to a force field which is generated by means of a force field source 5 in the chamber 4 in the vicinity of the carrier 3.
  • This force field source 5 can bring about an alignment of the particles in the paste.
  • a heating device 6 is provided, which ensures that the coated carrier 3 is heated and the paste loses viscosity, so that the particles located therein can be aligned more easily and more quickly.
  • the alignment can advantageously take place during the time in which the corresponding section of the carrier 3, which is continuously moved over the transport device 2, is located in the chamber 4 in the area of the force field source 5. Chamber 4 and force field source 5 or heating device 6 can be dimensioned accordingly.
  • the force field source 5 and the heating device 6 are arranged in such a way that, in terms of time, heating also takes place precisely during the alignment of the particles. During the transport of the carrier 3, the paste is thus simultaneously exposed to the heating device 6 and also to the force field generated by the source 5.
  • the corresponding device 11 for aligning particles in a paste here also comprises a transport device 12 in the form of rolls, a carrier film 13 coated with a paste 13a being transported.
  • the carrier 13 with the coating 13 a is transported through a humidity chamber 14.
  • These magnet boards 15 can consist, for example, of a rod-like arrangement of permanent magnets, these rods being arranged in a line-like manner transversely or essentially transversely (with a predetermined angular offset, deviating from a 90 ° orientation) to the transport direction, so that the alignment of the field lines changes from line to line and the coating 13a experiences an alternating magnetic field during transport through the chamber 14.
  • a heating device 16 in the form of an IR lamp is initially provided in its initial area (in FIG. 2: from right to left).
  • the humidity in the chamber 14 is generated by a steam source or an evaporator 17. Both temperature and air humidity in the environment are determined via corresponding sensors 18a, 18b.
  • a temperature sensor 18c is provided which, however, is designed and arranged in such a way that only the temperature of the coating or paste 13a measures.
  • the data from the sensors 18a, 18b, 18c are passed on to a control device (not shown), which in turn regulates the heating device 16 and the steam source 17 in particular.
  • FIG. 3 shows a device 21 for aligning particles, which initially in any case has a transport device 22 in the form of rollers, over which a carrier film 23 with a coating 23a is guided and transported.
  • a transport device 22 in the form of rollers
  • magnet boards 25 which serve as a force field source, are arranged below the carrier tape 23.
  • 24.1, 24.2, 24.3, ..., 24.n has a heating device 26.1, 26.2,
  • Each sub-chamber 24.1, 24.2, 24.3, ..., 24.n is individually equipped with sensors 28.1, 28.2, 28.3, ..., 28.n, so that air humidity and temperature are individually regulated for each of the sub-chambers via one or more control devices can .
  • the magnet boards 25 can extend over all sub-chambers 24.1, 24.2, 24.3,..., 24.n along the transport path or even end beforehand; this is indicated by a dashed line magnet board section 25.n. It is conceivable, for example, to press the air humidity in the sub-chamber 24.n above it even below the normal ambient value (using silica gel) or to lower the pressure in order to consciously increase the drying rate here in order to quickly immobilize the particles.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un procédé d'orientation de particules dans une pâte (13a, 23a), comprenant : la fourniture de la pâte (13a, 23a), qui comprend des particules qui peuvent être orientées dans la pâte, la pâte comprenant, notamment, des particules à base de carbone, de préférence du graphite et/ou une substance volatile, et l'exposition de la pâte (13a, 23a) à l'influence d'un champ de force de sorte que les particules subissent une force due à l'interaction avec le champ de force, au moyen de laquelle les particules sont orientées par rapport aux lignes de champ du champ de force. Dans l'optique d'économiser les coûts et d'améliorer la productivité, la pâte (13a, 23a) est chauffée afin de réduire ne serait-ce que temporairement la viscosité de la pâte (13a, 23a) et de réduire le temps d'orientation requis pour orienter les particules dans le champ de force, la pâte (13a, 23a) étant chauffée avant l'exposition et/ou en même temps que l'exposition de la pâte à l'influence du champ de force.
EP20833741.0A 2019-12-19 2020-12-11 Procédé et appareil pour orienter des particules dans une pâte Pending EP4076773A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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WO2002050170A1 (fr) * 2000-12-19 2002-06-27 Universite Catholique De Louvain Procede pour reguler la morphologie d'une surface polymere et surface polymere ainsi obtenue
WO2002063660A1 (fr) * 2001-02-07 2002-08-15 Optiva, Inc. Procede d'obtention de films cristallins anisotropiques et dispositifs de mise en oeuvre du procede
JP4150516B2 (ja) * 2001-12-21 2008-09-17 三星エスディアイ株式会社 リチウム二次電池の負極用の黒鉛含有組成物の製造方法並びにリチウム二次電池用の負極の製造方法及びリチウム二次電池の製造方法
JP2003197182A (ja) * 2001-12-21 2003-07-11 Samsung Sdi Co Ltd 黒鉛含有組成物並びにリチウム二次電池用の負極及びリチウム二次電池
US7326497B2 (en) * 2001-12-21 2008-02-05 Samsung Sdi Co., Ltd. Graphite-containing composition, negative electrode for a lithium secondary battery, and lithium secondary battery
JP5534771B2 (ja) * 2009-10-09 2014-07-02 パナソニック株式会社 塗布膜の乾燥方法と乾燥装置
CN102306750B (zh) * 2011-08-19 2015-11-25 东莞新能源科技有限公司 锂离子电池负极片的制备方法及涂膜干燥装置
EP2793300A1 (fr) * 2013-04-16 2014-10-22 ETH Zurich Procédé pour la production d'électrodes et électrodes réalisées à l'aide d'un tel procédé
CA2962135C (fr) * 2014-11-27 2022-11-08 Sicpa Holding Sa Dispositifs et procedes d'orientation de particules de pigment magnetiques ou magnetisables en forme de plaquette
WO2018047054A1 (fr) * 2016-09-06 2018-03-15 Battrion Ag Procédé et dispositif pour appliquer des champs magnétiques sur un objet
KR102483995B1 (ko) * 2016-12-07 2022-12-30 삼성에스디아이 주식회사 이차 전지용 음극 및 그의 제조 방법
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DE102019135308A1 (de) 2021-06-24
KR20220127835A (ko) 2022-09-20
JP2023507213A (ja) 2023-02-21
CN114829022A (zh) 2022-07-29
WO2021122348A1 (fr) 2021-06-24

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