Method for producing catalyst-coated membranes for a fuel cell or electrolysis cell of an electrochemical device
Patent Information
- Application Number
- EP2024824432
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-12-20
- Filing Date
- 2024-12-11
- Publication Date
- 2026-09-09
AI Technical Summary
Existing methods for producing catalyst-coated membranes for fuel cells and electrolysis cells are complex and costly, necessitating a simpler and more reliable production method.
A method involving the use of roll-shaped carrier films and membrane blanks, where electrodes are intermittently coated on the carrier film, and membrane blanks are arranged with electrodes in a defined orientation, followed by pressing and heating to adhere the electrodes to the membranes.
This method enables the continuous, high-quality production of catalyst-coated membranes with reduced costs, facilitating efficient manufacturing processes for fuel cells and electrolysis cells.
Smart Images
Figure EP2024085786_26062025_PF_FP_ABST
Abstract
Description
[0001] Method for producing catalyst-coated membranes for a fuel cell or electrolysis cell of an electrochemical device
[0002] The invention relates to a method for producing catalyst-coated membranes for a fuel cell or electrolysis cell of an electrochemical device.
[0003] DE 10 2017 108 413 A1 discloses an electrochemical device designed as an electrolysis device with a cell stack composed of a plurality of cell stack elements. Furthermore, the electrolysis device known from this prior art has a force application unit, via which a force can be exerted on the cell stack in order to press the cell stack elements of the cell stack together in a fluid-tight manner. One of the cell stack elements of the cell stack is a catalyst-coated membrane that carries a first electrode, in particular an anode, on a first side and a second electrode, in particular a cathode, on an opposite second side.
[0004] From the article “A completely slot die coated membrane electrode assembly, Markus Stabler et al., International Journal of Hydrogen Energy, 44, pages 7053 to 7058, year 2019” and from the article “A Holistic Consideration of Megawatt Electrolysis as a Key Component of Sector Coupling, Bernd Emonts et al., Energies, 15, 3656, year 2022”, methods for producing catalyst-coated membranes for a fuel cell or an electrolysis cell are known, although these methods are complex.
[0005] DE 199 40 015 A1 discloses a method for producing an electrode in which a coating material is applied to a fabric. DE 10 2021 123475 A1 discloses a method for the efficient, automated, precise, and cost-effective production of multilayer, continuous webs of membrane electrode assemblies suitable for use in fuel cells, water electrolysis cells, electrochemical compressors, and electrochemical sensors.
[0006] There is a need to produce catalyst-coated membranes for a fuel cell or electrolysis cell with lower costs and high quality.
[0007] Based on this, the present invention seeks to provide a simpler and more reliable method for producing catalyst-coated membranes for a fuel cell or electrolysis cell of an electrochemical device. This object is achieved by a method according to claim 1 and by a method according to claim 4.
[0008] The inventive method according to claim 1 comprises at least the following steps: Providing a roll-shaped carrier film, in particular designed as a decal film, which intermittently receives first electrodes. Providing membrane blanks. Providing carrier film blanks, in particular designed as decal film blanks, which receive second electrodes. Unwinding the carrier film, in particular designed as a decal film, which intermittently receives the first electrodes. And detecting the position of the first electrodes on the unwound carrier film, in particular designed as a decal film.Arranging the membrane blanks and the carrier film blanks, in particular designed as decal film blanks, on the unwound carrier film depending on the detected position of the first electrodes on the unwound carrier film, in particular designed as decal film, such that a first electrode is arranged on a first side of each membrane blank and a second electrode is arranged on a second side of each membrane blank in a defined relative orientation, wherein the first electrodes are arranged between the membrane blanks and the unwound carrier film and the second electrodes are arranged between the membrane blanks and the carrier film blanks. Pressing and heating the arrangement comprising the carrier film, in particular designed as decal film, the membrane blanks, the electrodes, and the carrier film blanks, in particular designed as decal film blanks.Separating the membrane blanks with the electrodes received by the membrane blanks from the carrier film, which is in particular designed as a decal film, and the carrier film blanks, which are in particular designed as decal film blanks.
[0009] The inventive method according to claim 4 comprises at least the following steps: Providing a roll-shaped wound carrier film that intermittently accommodates first electrodes. Providing a roll-shaped wound membrane. Providing carrier film blanks that accommodate second electrodes. Providing a roll-shaped wound protective film. Unwinding the carrier film that intermittently accommodates the first electrodes and detecting the position of the first electrodes on the unwound carrier film. Unwinding the membrane and arranging the unwound membrane on the unwound carrier film such that the first electrodes are arranged between the carrier film and the membrane.Arranging the carrier film blanks on the unwound membrane, which is arranged on the unwound carrier film, depending on the detected position of the first electrodes on the unwound carrier film, such that the first electrodes are arranged on a first side of the unwound membrane and the second electrodes are arranged on a second side of the unwound membrane in a defined relative orientation, wherein the second electrodes are arranged between the membrane and the carrier film blanks. Unwinding the roll-shaped wound protective film and arranging the unwound protective film on the carrier film blanks arranged on the second side of the membrane. Pressing and heating the assembly comprising the unwound carrier film, the membrane, the carrier film blanks, the electrodes, and the protective film.Separating the membrane together with the electrodes held by the membrane from the carrier film, the carrier film cutouts and the protective film and winding up the membrane holding the electrodes in a roll.
[0010] The method according to claim 1 and also the method according to claim 4 each allow a simple, continuous production of catalyst-coated membranes for a fuel cell or an electrolysis cell of an electrochemical device with high quality.
[0011] Preferably, in a further development of the method according to claim 1, for pressing and heating the arrangement comprising the carrier film, the membrane blanks, the electrodes, and the carrier film blanks, the unwound carrier film, together with the membrane blanks, the electrodes, and the carrier film blanks, is conveyed through a calender, a hot press, or a belt press. Preferably, in a further development of the method according to claim 4, for pressing and heating the arrangement comprising the carrier film, the membrane, the carrier film blanks, the electrodes, and the protective film, the unwound carrier film, together with the membrane, the carrier film blanks, the electrodes, and the protective film, is conveyed through a calender, a hot press, or a belt press.This makes it possible to reliably transfer the electrodes initially located on the carrier foil and the carrier foil blanks to the membrane blanks or the membrane while adhering to the membrane blanks or the membrane.
[0012] Preferably, in a further development of the method according to claim 1, for separating the membrane blanks with the electrodes received by the membrane blanks from the carrier film and the carrier film blanks, the carrier film blanks are peeled off, and the membrane blanks with the electrodes received by them are also removed from the carrier film, wherein the carrier film is wound up as an empty carrier film. Either the membrane blanks with the electrodes received by them are peeled off the carrier film, or the membrane blanks with the electrodes received by them fall off the carrier film during winding up. This allows the membrane blanks with the electrodes received by them to be advantageously separated and singulated in a continuous production process.
[0013] Preferably, in a further development of the method according to claim 4, for separating the membrane with the electrodes accommodated by the membrane from the carrier film and the carrier film blanks, the carrier film blanks are first pulled off and wound up together with the protective film, wherein the membrane with the electrodes accommodated by the membrane is subsequently removed from the carrier film, which is wound up as an empty carrier film. Preferably, a separating film is wound up along with the membrane accommodating the electrodes during roll-form winding. This allows the membrane with the electrodes accommodated by the membrane to be advantageously separated and singulated in a continuous manufacturing process.
[0014] Preferred developments of the invention will become apparent from the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail, without being limited thereto, with reference to the drawings. Herein:
[0015] Fig. 1 is a first diagram to illustrate the invention,
[0016] Fig. 2 shows a second diagram to illustrate the invention;
[0017] Fig. 3 a detail of the scheme of Figs. 1 and 2,
[0018] Fig. 4 shows a third scheme to illustrate the invention.
[0019] The invention relates to a method for producing catalyst-coated membranes (also called CCMs) for a fuel cell or for a hydrogen electrolysis cell of an electrochemical device. Such catalyst-coated membranes have a first electrode, in particular an anode, on a first side of the membrane and a second electrode, in particular a cathode, on an opposite second side of the membrane. However, the assignment of anode and cathode to the two sides of the membrane can also be reversed. Two methods for producing catalyst-coated membranes are described below.
[0020] A first method according to the invention for producing catalyst-coated membranes comprises at least the following steps:
[0021] Providing a carrier film wound in roll form, in particular in the form of a decal film, which intermittently accommodates first electrodes. In particular, the carrier film, which is wound in roll form, is intermittently coated with the first electrodes.
[0022] Providing membrane cut-outs.
[0023] Providing carrier foil blanks, particularly designed as decal foil blanks, wherein the carrier foil blanks accommodate second electrodes. In particular, the carrier foil blanks are coated with second electrodes.
[0024] While the carrier film, in particular designed as a decal film, which is intermittently coated with first electrodes, is provided as a roll, in the first method according to the invention, the membrane blanks and the carrier film blanks, in particular designed as decal film blanks, which receive the second electrodes, are preferably provided as a stack, namely as a first stack of membrane blanks and a second stack of carrier film blanks. The carrier film, in particular designed as a decal film, which intermittently receives the first electrodes and is wound in a roll, is continuously unwound, wherein the position of the first electrodes on the unwound carrier film is detected.Depending on the detected position of the first electrodes on the unwound carrier film, the membrane blanks and the carrier film blanks, in particular designed as decal film blanks, are arranged on the unwound carrier film, in particular designed as decal film, in such a way that a first electrode is arranged on a first side of each membrane blank and a second electrode is arranged on a second side of each membrane blank in a defined relative orientation. This applies both to the relative orientation of the membrane blanks to the first electrodes and to the relative orientation of the carrier film blanks, in particular designed as decal film blanks, and thus of the second electrodes, to the membrane blanks and the first electrodes.
[0025] The first electrodes are arranged between the membrane blanks and the unwound carrier foil and the second electrodes are arranged between the membrane blanks and the carrier foil blanks.
[0026] The assembly of carrier film, membrane blanks, electrodes, and carrier film blanks is pressed and heated. The unwound carrier film, particularly in the form of a decal film, is preferably conveyed through a calender together with the membrane blanks and carrier film blanks arranged thereon, as well as the electrodes. Alternatively, the unwound carrier film, particularly in the form of a decal film, can also be conveyed through a hot press or a belt press together with the membrane blanks and carrier film blanks arranged thereon, as well as the electrodes.
[0027] Subsequently, the membrane blanks are separated with the electrodes accommodated by the membrane blanks, i.e. the catalyst-coated membrane is separated from the carrier film, which is particularly designed as a decal film, and the carrier film blanks, which are particularly designed as decal film blanks.
[0028] Further details of the first method according to the invention are described below with reference to Figures 1 to 3, wherein for the sake of simplicity the carrier film is referred to below as decal film and the carrier film blanks as decal film blanks.
[0029] Fig. 1 shows a roll 10 on which a decal film 11 intermittently coated with first electrodes, in particular with cathodes, is wound in a roll-like manner. This decal film 11, which intermittently carries the first electrodes, is continuously unwound from the roll 10 and transported in the direction of arrow 12 toward another roll 13, onto which the decal film 11 is subsequently rewound. The position of the first electrodes on the unwound decal film 11 is recorded in Fig. 1 using a camera 14, for which purpose in Fig.
[0030] 1, the decal film 11 is illuminated by means of a lighting device 15. The lighting device 15 can be an LED light source, and the camera 14 can be a line scan camera.
[0031] Fig. 1 further shows a device 16 for arranging membrane blanks on the decal film, and also a device 17 for arranging decal film blanks on the decal film 11, namely after the membrane blanks have been applied using the device 16. The application of the membrane blanks using the device 16 and the application of the decal film blanks using the device 17 to the decal film 11 takes place depending on the detected position of the first electrodes on the unwound decal film 11, namely in such a way that a first electrode is arranged on a first side of each membrane blank and a second electrode, in particular an anode, is arranged on a second side of each membrane blank in a defined relative orientation.The first electrodes are arranged between the membrane cutouts and the unwound decal film 11 and the second electrodes are arranged between the membrane cutouts and the decal film cutouts.
[0032] Fig. 1 further shows web edge sensors 27, which detect the position of the decal film 11 transversely to the transport direction of the decal film 11. The transport direction of the decal film 11 extends from the roll 10 to the roll 13. The application of the membrane blanks using the device 16 and the application of the decal film blanks using the device 17 to the decal film 11 takes place depending on the position of the first electrodes on the unwound decal film 11, which is detected by the camera 14, and preferably also depending on the position of the decal film 11 transversely to the transport direction thereof, which position is detected by the web edge sensors 27.
[0033] Fig. 3 shows a detail of Fig. 1 immediately downstream of the device 17, wherein Fig. 1 shows a section of the decal film 11 in the region of a first electrode 12, in particular a cathode, arranged on the decal film 11, a membrane blank 18 positioned on the first electrode 12 with the aid of the device 16 and a decal film blank 19 positioned on the membrane blank 18 with the aid of the device 17 with a second electrode 20, in particular an anode, received by the decal film blank 19.
[0034] Following the device 17, the unwound decal film 11 with the membrane blanks 18, decal film blanks 19, and the electrodes 20 and 21 arranged thereon, as shown in Fig. 3, is preferably conveyed through a calender 22, which in Fig. 1 comprises two rollers 23 rolling on top of one another. The rollers 23 of the calender 22 are typically heated, so that the arrangement shown in Fig. 3 is pressed at a defined pressure and at a defined temperature. In this case, the electrodes 20, 21 adhere more strongly to the membrane blank 18 than to the decal film 11 and the decal film blank 19. After the decal film 11 has been conveyed through the calender 22 together with the membrane blank 18 and decal film blank 19 as well as the electrodes 20, 21, the decal film blank 19 is subsequently removed from the arrangement in Fig.3 is removed, whereby the second electrode 20 remains attached to the membrane blank 18.
[0035] Subsequently, in Fig. 1, an assembly comprising the membrane blank 18 and the two electrodes 20, 21 arranged on different sides of the membrane blank 18 is removed from the decal film 11 in a device 25, with the empty decal film 11 then being wound onto the roll 13. The devices 24, 25 can be robot arms.
[0036] In contrast, Fig. 2 shows a modification of Fig. 1 in which the device 25 is omitted. In Fig. 2, the catalyst-coated membranes, which comprise the membrane blanks 18 and the electrodes 20, 21 adhering to the membrane blanks 18, automatically fall off the decal film 11 when the decal film 11 is wound onto the roll 13 and are collected in a container 26.
[0037] According to Fig. 3, the membrane blanks have a projection relative to the electrodes 20, 21. Such catalyst-coated membranes with a membrane projection relative to the electrodes 20, 21 are particularly preferred for fuel cells or electrolysis cells. However, catalyst-coated membranes without such a membrane projection can also be produced.
[0038] A second method according to the invention for producing catalyst-coated membranes comprises at least the following steps: providing a carrier film wound in roll form, in particular in the form of a decal film, which intermittently accommodates first electrodes. In particular, the carrier film, wound in roll form, is intermittently coated with the first electrodes.
[0039] Providing a roll-shaped wound membrane.
[0040] Providing carrier foil blanks, particularly designed as decal foil blanks, wherein the carrier foil blanks accommodate second electrodes. In particular, the carrier foil blanks are coated with second electrodes.
[0041] The carrier film, which is intermittently coated with first electrodes and is in particular designed as a decal film, is provided as a roll, just like the membrane, wherein in the second method according to the invention the carrier film cutouts, which are in particular designed as decal film cutouts and which receive the second electrodes, are preferably provided as a stack.
[0042] The carrier film, which is particularly designed as a decal film, which intermittently accommodates the first electrodes and is wound in a roll, is continuously unwound, whereby the position of the first electrodes on the unwound carrier film is detected. Furthermore, the membrane is continuously unwound and arranged on the unwound carrier film such that the first electrodes are arranged between the carrier film and the membrane.
[0043] Depending on the detected position of the first electrodes on the unwound carrier film, the carrier film blanks, which are particularly designed as decal film blanks, are arranged on the unwound membrane in such a way that first electrodes are arranged on a first side of the membrane and second electrodes are arranged on a second side of the membrane in a defined relative orientation. The second electrodes are arranged between the membrane and the carrier film blanks.
[0044] Unwinding the roll-shaped protective film and arranging the unwound protective film on the carrier film cut-outs arranged on the second side of the membrane.
[0045] The assembly comprising the carrier film, the membrane, the carrier film blanks, the electrodes, and the protective film is pressed and heated. The unwound carrier film, in particular in the form of a decal film, is preferably conveyed through a calender together with the membrane and carrier film blanks arranged thereon, as well as the electrodes and the protective film. Alternatively, the unwound carrier film, in particular in the form of a decal film, can also be conveyed through a hot press or a belt press together with the membrane and carrier film blanks arranged thereon, as well as the electrodes and the protective film.
[0046] Subsequently, the membrane with the electrodes accommodated by the membrane is separated from the carrier film, which is particularly designed as a decal film, the carrier film cutouts, which are particularly designed as decal film cutouts, and the protective film, and the membrane accommodating the electrodes is wound up in a roll.
[0047] Further details of the second method according to the invention are described below with reference to Figure 4, wherein for the sake of simplicity the carrier film is again referred to as decal film and the carrier film blanks are again referred to as decal film blanks.
[0048] Fig. 4 shows a roll 110 on which a decal film 111 intermittently coated with first electrodes, in particular cathodes, is wound in a roll-like manner. This decal film 111, which intermittently carries the first electrodes, is continuously unwound from the roll 110 and transported in the direction of arrow 112 toward another roll 113, onto which the decal film 111 is subsequently rewound.
[0049] The position of the first electrodes on the unwound decal film 111 is detected in Fig. 4 using a camera 114, wherein the decal film 111 is illuminated using an illumination device 115. The illumination device 115 can be an LED light source, and the camera 114 can be a line scan camera.
[0050] Fig. 4 shows another roll 116 on which a membrane 118 is wound in a roll-like manner. This membrane 118 is continuously unwound from the roll 116 and transported in the direction of arrow 112 toward another roll 117, onto which the membrane 118 is subsequently rewound. The unwound membrane 118 is arranged on the unwound decal film 111 such that the first electrodes are arranged between the decal film 111 and the membrane 118.
[0051] Fig. 4 further shows a device 119 for arranging decal foil blanks on the decal foil 111, namely after the application of the membrane 118 on the decal foil 111. The decal foil blanks carry second electrodes.
[0052] The application of the decal film cutouts to the decal film 111 using the device 119 depends on the detected position of the first electrodes on the unwound decal film 111, specifically such that the first electrodes are arranged on a first side of the membrane 118 and the second electrodes are arranged on a second side of the membrane in a defined relative orientation. The first electrodes are arranged between the membrane 118 and the unwound decal film 111, and the second electrodes are arranged between the membrane 118 and the decal film cutouts. Fig. 4 also shows web edge sensors 127, which detect the position of the decal film 111 transversely to the transport direction of the decal film 111. The transport direction of the decal film 111 extends from the roll 110 to the roll 113.The application of the decal film cut-outs to the decal film 111 by means of the device 119 takes place depending on the position of the first electrodes on the unwound decal film 111, which is detected by means of the camera 114, and preferably also depending on the position of the decal film 111 transversely to the transport direction thereof, which position is detected by the web edge sensors 127.
[0053] Fig. 4 shows another roll 120 on which a protective film 121 is wound in a roll-like manner. This protective film 121 is continuously unwound from the roll 120 and transported toward another roll 122, onto which the protective film 121 is subsequently rewound. The unwound protective film 121 is arranged on the unwound membrane 118, namely on the decal film cutouts arranged on the second side of the membrane 118.
[0054] Subsequently, the unwound decal film 111 with the membrane 118 arranged thereon, the decal film blanks, the electrodes and the protective film 121 is preferably conveyed through a calender 124, which in Fig. 1 comprises two rollers 123 rolling on one another.
[0055] The rollers 123 of the calender 124 are typically heated, so that the assembly of the decal film 111, the membrane 118, the decal film blanks, the electrodes, and the protective film 121 is pressed together at a defined pressure and a defined temperature. The electrodes then adhere more strongly to the membrane 118 than to the decal film 111 and the decal film blanks. After the decal film 111, together with the membrane 118 and the decal film blanks, as well as the electrodes, are conveyed through the calender 124, the membrane 118, together with the electrodes held by the membrane 118, is separated from the decal film 111, the decal film blanks, and the protective film 121, and the membrane 118 holding the electrodes is wound up into a roll.
[0056] To separate the membrane 118 with the electrodes held by the membrane 118 from the decal film 111 and the decal film blanks, the decal film blanks are removed together with the protective film 121 and wound onto the roll 122. The decal film blanks adhere to the protective film 121, and the second electrodes adhere to the membrane 118. The membrane 118 with the first and second electrodes held by them is removed from the decal film 111. The empty decal film 111 is wound onto the roll 113. The membrane 118 is wound onto the roll 117 together with the electrodes held by the membrane 118, wherein during the roll-shaped winding of the membrane 118 holding the electrodes onto the roll 117, a separating film 125 is wound onto the roll 117, which was previously unwound from the roll 126.The separating film 125 prevents damage to the electrodes arranged on the membrane 118 when the membrane 118 is wound onto the roll 117.
[0057] To produce individual catalyst-coated membranes, the membrane 118 can be unwound from the roll 117 and severed transversely to the transport direction during unwinding.
[0058] The invention allows the production of catalyst-coated membranes in a continuous process, in a simple manner and with high quality.
Claims
Claims 1 . A method for producing catalyst-coated membranes for a fuel cell or electrolysis cell of an electrochemical device, wherein the respective catalyst-coated membrane carries a first electrode on a first side of the membrane and a second electrode on an opposite second side of the membrane, comprising the following steps: Providing a roll-shaped carrier foil which intermittently receives first electrodes, Providing membrane cut-outs, Providing carrier foil blanks that accommodate second electrodes, Unwinding the carrier film, which intermittently receives the first electrodes, and detecting the position of the first electrodes on the unwound carrier film, Arranging the membrane blanks and the carrier film blanks on the unwound carrier film depending on the detected position of the first electrodes on the unwound carrier film, such that a first electrode is arranged on a first side of each membrane blank and a second electrode is arranged on a second side of each membrane blank in a defined relative orientation, wherein the first electrodes are arranged between the membrane blanks and the unwound carrier film and the second electrodes are arranged between the membrane blanks and the carrier film blanks, Pressing and heating the assembly of the carrier foil, the membrane blanks, the electrodes and the carrier foil blanks, Separating the membrane blanks together with the electrodes picked up by the membrane blanks from the carrier foil and the carrier foil blanks.
2. Method according to one of claims 1, wherein for separating the membrane blanks with the electrodes received by the membrane blanks from the carrier film and the carrier film blanks, the carrier film blanks are pulled off, wherein the membrane blanks with the electrodes received by them are removed from the carrier film, which is wound up as an empty carrier film.
3. The method according to claim 2, wherein the membrane blanks with the electrodes received therein are pulled off the carrier film, or the membrane blanks with the electrodes received therein fall off the carrier film when the latter is wound up.
4. A method for producing catalyst-coated membranes for a fuel cell or electrolysis cell of an electrochemical device, wherein the respective catalyst-coated membrane carries a first electrode on a first side of the membrane and a second electrode on an opposite second side of the membrane, comprising the following steps: Providing a roll-shaped carrier foil which intermittently receives first electrodes, Providing a roll-shaped wound membrane, Providing carrier foil blanks that accommodate second electrodes, Providing a roll-shaped protective film, Unwinding the carrier film, which intermittently receives the first electrodes, and detecting the position of the first electrodes on the unwound carrier film, Unwinding the membrane and arranging the unwound membrane on the unwound carrier film such that the first electrodes are arranged between the carrier film and the membrane, Arranging the carrier film blanks on the unwound membrane, which is arranged on the unwound carrier film, depending on the detected position of the first electrodes on the unwound carrier film, such that the first electrodes are arranged on a first side of the unwound membrane and the second electrodes are arranged on a second side of the unwound membrane in a defined relative orientation, wherein the second electrodes are arranged between the membrane and the carrier film blanks, Unwinding the roll-shaped protective film and arranging the unwound protective film on the carrier film cut-outs arranged on the second side of the membrane, Pressing and heating the assembly of the carrier film, the membrane, the carrier film blanks, the electrodes and the protective film, Separating the membrane together with the electrodes held by the membrane from the carrier film, the carrier film cutouts and the protective film and winding up the membrane holding the electrodes in a roll.
5. The method according to claim 4, wherein, for separating the membrane with the electrodes received by the membrane from the carrier film and the carrier film blanks, the carrier film blanks are pulled off and wound up together with the protective film, wherein the membrane with the electrodes received by them is removed from the carrier film, which is wound up as an empty carrier film.
6. Method according to one of claims 4 or 5, wherein a separating film is wound up during the roll-shaped winding of the membrane receiving the electrodes.
7. The method according to any one of claims 1 to 6, wherein the position of the first electrodes on the unwound carrier film is detected by means of a camera.
8. The method according to any one of claims 1 to 7, wherein for pressing and heating the arrangement comprising the carrier film, electrodes, membrane or membrane blanks, the carrier film blanks and optionally the protective film, the arrangement is conveyed through a calender or a hot press or a belt press.
9. Method according to one of claims 1 to 8, wherein a decal film is used as the carrier film, and / or a decal film is used as the protective film, and / or decal film cutouts are used as carrier film cutouts 10. The method according to any one of claims 1 to 9, wherein the membranes of the catalyst-coated membrane have a projection relative to the electrodes of the catalyst-coated membrane.