Apparatus and method for producing coating mixtures, electrodes, and battery cells

Abstract

Apparatus (100, 200, 300) and method for producing a homogenized coating mixture for electrodes of a battery cell, wherein the apparatus (100, 200, 300) comprises an extruder (102) for producing a homogenized coating mixture, a delivery point (106) for supplying the coating mixture homogenized by the extruder (102), and a degassing device (104) installed downstream of the extruder (102) and upstream of the delivery point (106), configured to continuously degas the coating mixture homogenized by the extruder (102), as well as a coating mixture, electrodes, and a battery cell.

Description

Technical Field

[0001] The present invention relates to an apparatus and a method for producing a coating mixture for an electrode of a battery cell. The present invention also relates to a coating mixture, an electrode, and a battery cell.

Background Art

[0002] For driving automobiles, batteries such as lithium-ion batteries are increasingly being used. Usually, a battery is composed of cells, and each cell includes an anode, a cathode, and a separator disposed therebetween. In the manufacture of battery cells, a so-called slurry is coated on a carrier material, for example, a carrier film (Traegerfolie). The slurry is understood to be a particularly homogeneous coating mixture, for example, a coating paste. The slurry is composed of a plurality of components such as an active material specific to the anode or cathode of the battery cell. After the coating is performed, usually, a drying process is carried out, and the slurry layer firmly adheres to the carrier material.

[0003] The individual components of the slurry are mixed, for example, as a homogenized slurry using an extruder. In order to ensure subsequent homogeneous application to the carrier material, the extruded slurry must be further degassed. This is usually done using an additional degassing tank. After the extrusion step, the slurry is filled into this tank and degassed within a predetermined residence time. This interrupts the transfer of the slurry to the coating device of the slurry. The disadvantage of this method is that the degassing tank is costly and requires a large space. Also, the burden of cleaning and maintenance increases. In the degassing tank, the degassing process requires a relatively long time until sufficient degassing can be performed.

[0004] For example, Document DE10 2004 012476A1 describes a method for manufacturing a lithium polymer battery in which an electrode material is extruded.

[0005] The present invention aims to structurally and / or functionally improve an apparatus for manufacturing the aforementioned electrode coating mixture. Furthermore, the present invention aims to structurally and / or functionally improve a method for manufacturing the aforementioned electrode coating mixture. Furthermore, the present invention aims to structurally and / or functionally improve the aforementioned coating mixture, the aforementioned electrode, and the aforementioned battery cell.

[0006] For example, an object of the present invention is to provide an apparatus and method for manufacturing electrode coating mixtures that can mitigate or eliminate problems pointed out in relation to the prior art. In particular, an object of the present invention is to significantly reduce the time of the degassing process and / or enable a continuous process. Nevertheless, it should be possible to provide a substantially bubble-free coating mixture for electrodes, in particular to avoid the trapping of gas and / or air in the electrode coating and consequently defects in the electrode. [Overview of the Initiative]

[0007] This problem is solved by an apparatus having the features of claim 1. Furthermore, this problem is also solved by a method having the features of claim 10. In addition, this problem is solved by a coating mixture having the features of claim 15, an electrode having the features of claim 16, and / or a battery cell having the features of claim 17. Advantageous embodiments and / or improvements are described by dependent claims, descriptions, and / or accompanying drawings. In particular, independent claims of one claim category, as well as dependent claims of another claim category, can be further developed and / or combined. Similarly, the features of the apparatus and processes described below can also be combined and / or further developed with respect to each other.

[0008] One embodiment relates to an apparatus for producing a coating mixture. This apparatus particularly comprises an extruder, a degasser, and a delivery point. The coating mixture may be a homogenized coating mixture. This apparatus may be configured to produce a homogenized coating mixture. In particular, this apparatus may be configured to produce a coating mixture for electrodes of a battery cell. The coating mixture may be a coating paste, for example, a so-called slurry. The coating mixture may be an anode material or a cathode material for electrodes of a battery cell. The battery cell may be, for example, a lithium-ion battery cell. The coating mixture may contain an active substance. The active substance may be specific to the anode or cathode. Furthermore, the coating mixture may contain a binder and / or a solvent and / or a conductive substance.

[0009] The extruder is preferably configured for the manufacture and / or mixing and / or homogenization of a coating mixture. The extruder may comprise a screw machine, for example, a multi-screw machine. The multi-screw machine may be configured as a multi-screw machine (dicht kaemmende Mehrwellen-Schneckenmaschine) that is driven to rotate in the same direction or in opposite directions and / or has tight meshing. The multi-screw machine may preferably be configured as a twin-screw machine. The multi-screw machine may particularly be a twin-screw extruder. Thus, the multi-screw machine may have at least two processing element shafts (Behandlungselement-Wellen) supported within a housing for mixing and / or homogenizing the components of the supplied coating mixture. The at least two processing element shafts may be configured to mix and / or homogenize the supplied components to form a coating mixture. The at least two processing element shafts may be extruder screws. The housing may be a cylindrical housing that accommodates the at least two processing element shafts. To supply the components of the coating mixture to the multi-screw machine, the multi-screw machine may have at least one supply opening. In a variation, the multi-screw machine may be provided with a discharge nozzle for discharging the mixed and / or homogenized coating mixture.

[0010] A delivery point may be configured to supply a coating mixture homogenized and / or extruded by an extruder. The delivery point may be a delivery device. In a modified example, the delivery point is formed to supply or transfer the coating mixture to a coating device. In this case, supply and / or delivery may be continuous. Furthermore, the device may include a coating device. The coating device may be configured to coat a carrier material, such as a carrier film, with the supplied coating mixture. The coating device may be a coating tool or include a coating tool. For example, the coating device may include a coating head and / or coater.

[0011] In a preferred modification, the degasser is installed downstream of the extruder and upstream of the delivery point. That is, viewed from the transport direction, the degasser is installed between the extruder and the delivery point, and in particular, degassing is performed before the extruded coating mixture reaches the delivery point. The degasser may be configured to continuously degass the coating mixture homogenized and / or extruded by the extruder. For example, the degasser may be an in-line degasser and / or a vacuum degasser. Preferably, the degasser may include a vacuum-compatible process chamber that can be evacuated during operation of the degasser.

[0012] In one modified example, the degasser is installed directly downstream of the extruder. In this case, the degasser can be located immediately after the outlet of the extruder. By connecting the degasser immediately after the extruder, the viscosity of the coating mixture after degassing is reduced, which facilitates the transport of the coating mixture through the subsequent longer transport line. Alternatively, the degasser can be installed directly upstream of the delivery point. In this case, the degasser can be installed immediately before the delivery point. In this way, the degasser can be effectively positioned immediately before the coating device. By connecting the degasser immediately before the delivery point or immediately before the coating device, it becomes possible to completely degasse the coating mixture and / or apply it without introducing new gas or air.

[0013] The apparatus may include at least one conveying line. The extruder, particularly the outlet of the extruder, may be connected to a delivery point via the conveying line. The apparatus may be configured to transport or deliver the extruded coating mixture to the delivery point via the conveying line. In this case, the transport can be carried out continuously. The conveying line may be provided with at least one pump, such as a transport pump. In a preferred modification, a degasser is effectively incorporated into or integrated with the conveying line, for example, the coating mixture extruded from the extruder is degassed, particularly continuously, before reaching the delivery point.

[0014] In one modification, a buffer tank can be provided between the extruder and the delivery point for temporarily storing the coating mixture. The buffer tank can be continuously filled or configured to be continuously filled. The buffer tank can be effectively incorporated into or integrated with the conveying line. The degasser can be installed, for example, directly upstream of the buffer tank, or, for example, directly downstream. That is, the degasser can be installed immediately before or immediately after the buffer tank. Furthermore, a recirculation circuit can be provided in the buffer tank. The recirculation circuit can include a return guideline connecting the outlet and inlet of the buffer tank. Furthermore, the recirculation circuit can include a pump, such as a conveying pump. In another modification, the degasser can be integrated into the recirculation circuit. By integrating it directly into the buffer tank, recirculation and degassing can be performed simultaneously, and precipitation of the coating mixture in the buffer tank can be prevented at the same time.

[0015] Furthermore, the apparatus can be configured to control the processing capacity of the extruder and / or the degasser and / or the delivery point. For this purpose, the degasser can be configured to have a controllable processing capacity. The processing capacity or throughput (Durchsatz) of the degasser can be controlled, for example, by controlling or adjusting the vacuum level of the degasser. Additionally or alternatively, the processing capacity of the degasser can be controlled via a pump, such as a conveyor pump in the conveyor line. The delivery point can also be configured to have a controllable processing capacity. Additionally or alternatively, the coating apparatus can be configured to have a controllable processing capacity. Furthermore, the extruder, or its multi-screw machine, can be configured to have a controllable processing capacity.

[0016] In one modified example, the apparatus can be configured to control the processing capacity of the degasser based on the processing capacity of the extruder and / or the processing capacity of the delivery point. Alternatively, the apparatus can be configured to control the processing capacity of the degasser based on the processing capacity of the coating apparatus. If the length of the conveying line between the extruder and the degasser is relatively short, for example less than 1 m, the pump can be omitted in this conveying line section. In this case, the conveying suction force generated by the degasser may be sufficient to convey the coating mixture to and / or through the degasser. The degassing capacity may correspond to and / or depend on the processing capacity of the extruder and / or the processing capacity of the delivery point or the coating apparatus.

[0017] This apparatus may have a control device for controlling processing capacity. The control device may be, for example, a centralized or distributed control device. The control device may be a control device for the extrusion apparatus, or a separate or additional control device.

[0018] The apparatus and / or control device may be configured to detect whether the buffer tank is substantially empty, half-filled, and / or fully filled. In this case, the apparatus and / or control device may be configured to increase the processing capacity of the extruder when it is detected that the buffer tank is substantially empty. Additionally or alternatively, the apparatus and / or control device may be configured to reduce the processing capacity of the delivery point and / or coating device, or to stop the coating device, in this case. The apparatus and / or control device may also be configured to reduce the processing capacity of the extruder when it is recognized that the buffer tank is substantially full. Additionally or alternatively, the apparatus and / or control device may be configured to increase the processing capacity of the delivery point and / or coating device, or to stop the extruder, in this case. Within the optimal operating range, the buffer tank may be substantially half-filled. Therefore, the apparatus and / or control device may be configured to substantially maintain and / or control the processing capacity to maintain the buffer tank in a substantially half-filled state. In this case, the device and / or control device may be configured to determine and / or consider the possibility of failure (Ausfallwahrscheinlichkeit).

[0019] Furthermore, the apparatus and / or control device may have various control modes, such as for fault-tolerance operation. One or more fault-tolerance operation modes may include, for example, fault-tolerance operation for the extruder, degasser, and / or coating apparatus in the event of a failure. The apparatus and / or control device may be configured to perform a complete stop (complete shutdown) in the event of a failure of the degasser and / or extruder and / or coating apparatus. For example, stopping the extruder, degasser, buffer tank or its recirculation circuit, and / or coating apparatus. Additionally or alternatively, the apparatus and / or control device may be configured to first empty the buffer tank before stopping, for example, performing a complete shutdown, in the event of an extruder failure. Furthermore, the apparatus and / or control device may be configured to stop the extruder and / or start or continue operation of the recirculation circuit in the event of a coating apparatus failure. Also, the apparatus and / or control device may be configured to maintain or reduce the processing capacity of the extruder substantially without changing it until the buffer tank is substantially full, in the event of a coating apparatus failure.

[0020] Another aspect relates to a method for producing a homogenized coating mixture for electrodes of a battery cell. The coating mixture may be a coating paste, for example, a so-called slurry. The coating mixture may be an anode material or a cathode material. The anode material or cathode material may be for electrodes of a battery cell. The battery cell may be, for example, a lithium-ion battery cell. The coating mixture may contain or be produced from multiple components. In particular, the coating mixture may contain an active substance. The active substance may be specific to the anode or cathode. For example, the active substance may be graphite (e.g., for the anode) or lithium nickel manganese cobalt oxide (e.g., for the cathode). Furthermore, the coating mixture may contain a binder and / or a solvent (e.g., an organic solvent or a water-based solvent), and / or a conductive material (e.g., carbon or conductive carbon black). Furthermore, the coating mixture may contain one or more additives.

[0021] In this method, the components of the coating mixture are first supplied to an extruder, particularly its multi-screw machine. The components can be supplied, for example, by one or more supply and / or dispensing devices. Supply can be continuous and / or dispensing. For example, the components can be supplied from a supply opening of the multi-screw machine. In a modified example, the supply opening may be the main supply opening of the multi-screw machine, for example, the main inlet.

[0022] The supplied components can be mixed and / or dispersed and / or homogenized, in particular, into a coating mixture using an extruder or its multi-screw machine. This can be done by the processing element shaft (Behandlungselement-Wellen) of a multi-screw machine. For example, a coating mixture can be produced by mixing at least one active substance, one binder, and one solvent using an extruder.

[0023] In this method, the coating mixture can be homogenized using an extruder or its multi-screw machine. The homogenized coating mixture can then be discharged or extruded from the extruder and / or its multi-screw machine, for example, continuously discharged or extruded.

[0024] The extruded coating mixture can be supplied to a degasser, for example, via a conveyor line. The supply can be continuous. The degasser can be used to continuously degasse the homogenized and / or extruded coating mixture.

[0025] The degassed coating mixture can be provided, in particular, for forming electrodes and / or coating a carrier material with the degassed coating mixture. The provision can be carried out, for example, in a coating device for coating a carrier material for an electrode of a battery cell. Subsequently, the carrier material can be coated with the degassed and / or provided coating mixture. The carrier material can be, for example, a carrier film such as an electrode film. The carrier material can be conductive. For example, the carrier material can be a copper film (e.g., for an anode) or an aluminum film (e.g., for a cathode). The carrier material can, for example, form a current collector of a battery cell.

[0026] In one embodiment, the coating mixture can be degassed immediately after extrusion or immediately before supply. In an alternative embodiment, the coating mixture can be degassed immediately after the buffer tank.

[0027] Another aspect relates to a coating mixture for an electrode of a battery cell. The coating mixture can be a coating paste, for example, a so-called slurry. The coating mixture can be an anode material or a cathode material for an electrode of a battery cell. For example, the coating mixture can be a slurry for a lithium-ion battery. This coating mixture is manufactured or can be manufactured by the methods described above and / or below and / or by the devices described above and / or below.

[0028] Another aspect relates to an electrode for a battery cell. The electrode can be an anode or a cathode. The electrode can have a carrier material. The carrier material can be coated with the coating mixture described above and / or below.

[0029] Another aspect relates to a battery cell. This battery cell includes at least one electrode. This at least one electrode is formed and / or manufactured as described above and / or below. For example, this battery cell includes two electrodes, particularly an anode and a cathode. A separator is disposed between the two electrodes. For example, the battery cell can be a lithium-ion battery cell. A lithium cell or a lithium-ion battery cell can be understood particularly as an electrochemical cell in which lithium is involved in its electrochemical reaction. For example, the lithium cell can be a lithium-ion cell or a lithium metal cell.

[0030] To summarize and rephrase, according to the present invention, among other things, an apparatus and a method for continuously degassing a battery slurry such as a lithium-ion battery slurry are provided. By combining degassing with a conveying output (e.g., as an alternative to a supply pump), various scenarios can be obtained. By installing a degassing device such as a degasser immediately after an extrusion device such as an extruder, the viscosity after degassing decreases, facilitating the conveyance of the coating mixture / slurry through subsequent longer pipes. By directly integrating it into a buffer tank, degassing and recirculation can be performed simultaneously, and precipitation of the slurry can be prevented simultaneously. By integrating it immediately before a coating device such as a coater, it can be ensured that the slurry or the coating mixture is completely degassed and / or applied without newly mixing air.

[0031] The present invention enables direct and continuous degassing within the process. The degassing process time can be significantly shortened. A coating mixture substantially free of bubbles for the electrode can be provided, and in particular, entrapment of gas and / or air in the electrode coating and thus defects on the electrode can be avoided. The degassing tank can be omitted. Thereby, costs and space can be saved. Furthermore, the labor for cleaning and maintenance can also be reduced.

Brief Description of the Drawings

[0032] The embodiments of the present invention will be described in more detail below with reference to the figures. The figures are illustrative and illustrative. [Figure 1] This figure shows an apparatus for producing a homogenized coating mixture for battery cell electrodes. [Figure 2] This figure shows a modified example of an apparatus for producing homogenized coating mixtures for battery cell electrodes. [Figure 3] This figure shows a further modification of the apparatus for producing homogenized coating mixtures for battery cell electrodes. [Modes for carrying out the invention]

[0033] Figure 1 shows an apparatus 100 for producing a homogenized coating mixture for the electrodes of a battery cell. For example, the coating mixture may be an anode material or a cathode material for the anode or cathode of a battery cell. The apparatus 100 includes an extruder 102, a degasser 104, and a delivery point 106. The extruder 102 is designed to produce and extrude a homogenized coating mixture, and the delivery point 106 is designed to provide the coating mixture homogenized and extruded by the extruder 102. The outlet of the extruder 102 is connected to the delivery point 106 via a transport line 108, and the degasser 104 is effectively (wirksam) integrated into the transport line 108.

[0034] The degassing device 104 is configured to continuously degas the coating mixture homogenized and extruded by the extruder 102. Preferably, the degassing device 104 is an in-line degassing device and / or a vacuum degassing device.

[0035] As shown in Figure 1, the degassing device 104 is installed downstream of the extruder 102 and upstream of the delivery point 106. In this embodiment shown in Figure 1, the degassing device 104 is installed immediately after the extruder 102, and therefore directly downstream of the outlet of the extruder 102. By installing the degassing device 104 immediately after the extruder 102, the viscosity of the coating mixture after degassing is reduced, making it easier to transport the coating mixture through the subsequent long transport line 108.

[0036] A coating apparatus 110 for coating a carrier material with a provided coating mixture is connected to the delivery point 106. The carrier material is electrode material for the electrodes of a battery cell. For example, the carrier material is supplied as a carrier film, particularly continuously, and then coated. For this purpose, the coating apparatus 110 is equipped with a coating head 112 and a coater 114.

[0037] Furthermore, the apparatus 100 includes a buffer tank 116 for temporarily storing the coating mixture between the extruder 102 and the delivery point 106. In this embodiment, the buffer tank 116 is incorporated into a transport line 108 between the degasser 104 and the delivery point 106. Additionally, a transport pump 118 is effectively provided in the transport line 108 between the degasser 104 and the buffer tank 116. The transport pump 118 can function to transport the coating mixture to the buffer tank 116 as intended. The buffer tank 116 is provided with a recirculation circuit 120, which includes a return transport line 122 connecting the outlet and inlet of the buffer tank 116 and enabling the recirculation of the coating mixture. One or more valves and / or transport pumps that are appropriately opened and closed may be provided to control the recirculation.

[0038] The apparatus 100 is further configured to control the processing capacity of the extruder 102, the degasser 104, and the delivery point 106. For this purpose, the degasser 104 is configured to be controllable by, for example, controlling the vacuum level of the degasser 104's vacuum process chamber. For example, the apparatus 100 is configured to control the processing capacity of the degasser 104 based on the processing capacity of the extruder 102 and / or the processing capacity of the delivery point 106. For this purpose, the apparatus 100 includes a control device (not shown in Figure 1). This is, for example, a control device for the extruder 102, or another additional control device.

[0039] The following describes a method for producing a homogenized coating mixture for battery cell electrodes using apparatus 100.

[0040] First, the components of the coating mixture are supplied to the extruder 102. Using the extruder 102, the components are mixed into the coating mixture. At this time, at least one type of active substance, one type of binder, and one type of solvent can be mixed using the extruder to form the coating mixture. The coating mixture is then homogenized and extruded.

[0041] Subsequently, the extruded coating mixture is continuously supplied to the degassing device 104. The degassing device 104 continuously degasses the coating mixture. In this embodiment shown in Figure 1, the coating mixture is continuously degassed immediately after extrusion.

[0042] The degassed coating mixture is transported to the buffer tank 116. The buffer tank 116 can operate in conjunction with the recirculation circuit 120, for example, to prevent sedimentation within the buffer tank 116, if necessary.

[0043] Subsequently, the degassed coating mixture is provided at the handover point 106, and electrodes for the battery cell are formed using the coating apparatus 110.

[0044] Figure 2 shows a modified apparatus 200 for producing a homogenized coating mixture for battery cell electrodes. Apparatus 200 is substantially equivalent to apparatus 100 shown in Figure 1.

[0045] Unlike apparatus 100, in apparatus 200, the degasser 104 is installed directly downstream of the buffer tank 116. In other words, the degasser 104 is installed immediately after the buffer tank 116, and the coating mixture is continuously degassed immediately after the buffer tank 116.

[0046] In this embodiment shown in Figure 2, the degassing device 104 is further incorporated into the recirculation circuit 120. By incorporating it immediately after the buffer tank 116, it prevents the precipitation of the coating mixture in the buffer tank 116 and enables degassing with recirculation.

[0047] For other points, please refer in particular to Figure 1 and its accompanying explanation.

[0048] Figure 3 shows another modification of the apparatus 300 for producing a homogenized coating mixture for battery cell electrodes. Apparatus 300 is substantially equivalent to apparatus 100 shown in Figure 1.

[0049] Unlike apparatus 100, in apparatus 300, the degasser 104 is installed directly upstream of the delivery point 106. In other words, the degasser 104 is installed immediately before the delivery point 106, and therefore the coating mixture is continuously degassed immediately before supply, i.e., immediately before coating.

[0050] By installing the degassing device 104 immediately before the handover point 106, that is, immediately before the coating device 110, the coating mixture can be completely degassed and / or applied without introducing any new gas or air.

[0051] For other points, please refer in particular to Figures 1 and 2, and the accompanying explanations.

[0052] "Can" refers specifically to the optional features of the present invention. Therefore, further developments and / or embodiments of the present invention exist, which additionally or alternatively possess one or more of their respective features.

[0053] From the combination of features disclosed herein, features may be separated as needed, any structural and / or functional relationships that may exist between the features may be removed and combined with other features to limit the subject matter of the claims. The order and / or number of steps in the method may be changed. [Explanation of symbols]

[0054] 100 Coating mixture manufacturing apparatus (Anlage zur Herstellung eines Beschichtungsgemischs) 102 Extrusion machine 104 Degassing device (Entgasungseinrichtung) 106 Delivery point (Uebergabestelle) 108 Conveyor line (Foerderleitung) 110 Coating apparatus (Beschichtungseinrichtung) 112 Coating head (Beschichtungskopf) 114 Quarters (Beschichter) 116 Buffer Tank 118. Transport pump (Foerderpumpe) 120 Recirculation circuit (Rezirkulationskreislauf) 122 Return transport line (Rueckfoerderleitung) 200 Equipment for manufacturing coating mixtures (Anlage zur Herstellung eines Beschichtungsgemischs) 300 Equipment for manufacturing coating mixtures (Anlage zur Herstellung eines Beschichtungsgemischs)

Claims

1. Apparatus (100, 200, 300) for producing homogenized coating mixtures for battery cell electrodes, - An extruder (102) for producing the homogenized coating mixture, - A delivery point (106) for supplying the homogenized coating mixture by the extrusion device (102), - A degassing device (104) installed downstream of the extrusion device (102) and upstream of the delivery point (106), the degassing device (104) is configured to continuously degas the coating mixture homogenized by the extrusion device (102).

2. The apparatus according to claim 1, wherein the degassing device (104) is an in-line degassing device and / or a vacuum degassing device.

3. The apparatus according to claim 1 or 2, wherein the outlet of the extrusion device (102) is connected to the delivery point (106) via a conveyor line (108), and the degassing device (104) is effectively incorporated into the conveyor line (108).

4. The apparatus according to any one of claims 1 to 3, wherein the degassing device (104) is installed directly downstream of the extrusion device (102), or the degassing device (104) is installed directly upstream of the delivery point (106).

5. The apparatus according to any one of claims 1 to 4, wherein a buffer tank (116) for temporarily storing the coating mixture is provided between the extrusion apparatus (102) and the delivery point (106).

6. The apparatus according to claim 5, wherein the degassing device (104) is installed particularly directly upstream or particularly directly downstream of the buffer tank (116).

7. The apparatus according to claim 5 or 6, wherein the recirculation circuit (120) incorporating the degassing device (104) is provided in the buffer tank (116).

8. The apparatus according to any one of claims 1 to 7, wherein the apparatus (100, 200, 300) is configured to control the processing capacity of the extrusion apparatus (102), the degassing apparatus (104), and / or the delivery point (106), and / or the degassing apparatus (104) is configured to have a controllable processing capacity.

9. The apparatus according to any one of claims 1 to 8, wherein the apparatus (100, 200, 300) is configured to control the processing capacity of the degassing apparatus (104) based on the processing capacity of the extrusion apparatus (102) and / or the processing capacity of the delivery point (106).

10. A method for producing a homogenized coating mixture for the electrodes of a battery cell, - An extrusion step in which the coating mixture is homogenized and / or extruded using an extrusion device (102), - A degassing step in which the homogenized and / or extruded coating mixture is continuously degassed using a degassing device (104), - A method comprising the step of supplying the degassed coating mixture, particularly for the formation of electrodes.

11. The method according to claim 10, wherein the coating mixture is an anode material or a cathode material.

12. The method according to claim 10 or 11, wherein, in order to produce the coating mixture, at least an active substance, a binder, and a solvent are mixed using the extruder (102).

13. The method according to any one of claims 10 to 12, wherein the coating mixture is degassed immediately after the extrusion step or immediately before the supply step.

14. The method according to any one of claims 10 to 13, wherein the coating mixture is degassed immediately after the buffer tank (116).

15. A coating mixture for electrodes of a battery cell, wherein the coating mixture is manufactured using the method described in any one of claims 10 to 14 and / or the apparatus (100, 200, 300) described in any one of claims 1 to 9.

16. An electrode for a battery cell, particularly an anode or cathode, wherein the electrode comprises a carrier material coated with the coating mixture described in claim 15.

17. A battery cell, particularly a lithium-ion battery cell, comprising at least the electrodes described in claim 16.

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