CN209981373U - Single-roller transfer printing coating equipment for hydrogen fuel cell CCM membrane electrode - Google Patents
Single-roller transfer printing coating equipment for hydrogen fuel cell CCM membrane electrode Download PDFInfo
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- CN209981373U CN209981373U CN201921092719.7U CN201921092719U CN209981373U CN 209981373 U CN209981373 U CN 209981373U CN 201921092719 U CN201921092719 U CN 201921092719U CN 209981373 U CN209981373 U CN 209981373U
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Abstract
A single-roller transfer coating device of a hydrogen fuel cell CCM membrane electrode comprises: the unwinding mechanism is used for unwinding the proton exchange membrane; the first coating head is used for coating a first catalytic layer on the surface A of the proton exchange membrane; the first baking oven is used for baking the first catalytic layer at a first preset temperature; the protective film winding mechanism is used for collecting the protective film stripped from the surface B of the proton exchange membrane; the second coating head is used for coating the second catalytic layer on the transfer roller; the transfer roller is arranged on one side of the surface B of the proton exchange membrane, a heating source is arranged in the transfer roller, and the transfer roller heats the second catalyst layer at a second preset temperature; the pressing roller is arranged opposite to the transfer roller and is matched with the transfer roller to transfer the baked second catalytic layer to the B surface of the proton exchange membrane to obtain a CCM membrane electrode; and the winding mechanism is used for winding the CCM membrane electrode. The utility model has the advantages of the catalyst layer can be dried before the transfer, and the catalyst layer can not be taken away during the transfer.
Description
Technical Field
The utility model relates to an adsorption coating method and equipment for a hydrogen fuel cell CCM (catalyst coated membrane) membrane electrode.
Background
When the catalyst layers are coated on the two sides of the proton exchange membrane of the hydrogen fuel cell, most of the solvents used for the catalyst layers are alcohol substances, such as methanol, ethanol, propanol, isopropanol, n-propanol or glycerol, but most of the currently used proton exchange membranes are perfluorinated sulfonic acid membranes, so that when the catalyst layers are coated on the proton exchange membrane, the proton exchange membrane is swelled due to the existence of the alcohol solvents, and the quality of the proton exchange membrane is affected. In order to solve the swelling problem, people currently adopt two different coating methods, one is a support membrane coating method, which comprises the steps of coating a first catalyst layer on one surface (A surface) of a proton exchange membrane, drying the first catalyst layer, then attaching a support layer on the first catalyst layer, removing a bottom membrane, coating a second catalyst layer on the other surface (B surface) of the proton exchange membrane, drying the second catalyst layer, removing the support layer to form a CCM membrane electrode, and finishing rolling, wherein the method can be seen in Chinese patent document CN 1084481139A; the second is a transfer printing method, which is divided into two types, the first is a single-sided transfer printing method, and the specific method is that a first catalyst layer is coated on one side (A side) of the proton exchange membrane, a second catalyst layer is coated on a piece of release paper, the first catalyst layer and the second catalyst layer are respectively dried, the second catalyst layer is thermally transferred to the other side (B side) of the proton exchange membrane with the bottom membrane removed, the release paper is removed to form a CCM membrane electrode, and the rolling is completed, and the method is disclosed in Chinese patent document CN 106784944A; the second method is a double-sided transfer method, which comprises the specific steps of coating a first catalyst layer on first release paper, coating a second catalyst layer on second release paper, respectively drying the first catalyst layer and the second catalyst layer, respectively compounding the first catalyst layer and the second catalyst layer on two sides of a proton exchange membrane, then removing the first release paper and the second release paper to form a CCM membrane electrode, and completing rolling, wherein the method is disclosed in chinese patent document CN 109088073A.
In the above three methods, the removal of the protective film or the release paper may result in more or less partial removal of the catalytic layer, or incomplete transfer, which may result in incomplete surface morphology of the catalytic layer and uneven thickness distribution of the catalytic layer, which is not allowed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a single-roller transfer printing coating method and a single-roller transfer printing coating device for a proton exchange membrane of a hydrogen fuel cell, which can dry a catalyst layer before transfer and can not take away the catalyst layer during transfer.
The technical scheme of the utility model is that: the single-roller transfer printing coating method for CCM membrane electrode of hydrogen fuel cell adopts proton exchange membrane with two sides, one side is adhered with protective film and called B side, and the other side is not adhered with protective film and called A side, and includes the following steps:
s1, coating a first catalytic layer on the surface A of the proton exchange membrane;
s2, baking the first catalytic layer at a first preset temperature;
s3, uncovering the protective film on the B surface of the proton exchange membrane;
s4, coating a second catalyst layer on a transfer roller arranged on one side of the B surface of the proton exchange membrane, wherein a heating source is arranged in the transfer roller, and the transfer roller is heated at a second preset temperature to at least volatilize the alcohol solvent in the second catalyst layer;
and S5, transferring the baked second catalyst layer to the B surface of the proton exchange membrane by the transfer roller under the matching of the pressing roller arranged on the A surface side of the proton exchange membrane to obtain the CCM membrane electrode.
As an improvement of the utility model, after the step S5, the CCM membrane electrode is further baked at a third preset temperature at S6.
As an improvement, the outer surface of the transfer roller is coated with a release layer.
As an improvement of the utility model, the release layer is made of polytetrafluoroethylene.
As an improvement to the present invention, said first predetermined temperature is selected between 70 ℃ and 150 ℃; the two predetermined temperatures are selected between 80-200 degrees celsius.
As a refinement of the invention, the third predetermined temperature is selected between 70 degrees celsius and 150 degrees celsius.
The utility model also provides a single roll rendition coating equipment of hydrogen fuel cell CCM membrane electrode is suitable for the coating of volume to volume, include:
the unwinding mechanism is used for unwinding the proton exchange membrane, wherein the proton exchange membrane is provided with two surfaces, one surface is pasted with a protective film and is called a surface B, and the other surface is not pasted with the protective film and is called a surface A;
the first coating head is used for coating a first catalytic layer on the surface A of the proton exchange membrane;
the first baking oven is used for baking the first catalytic layer at a first preset temperature;
the protective film winding mechanism is used for collecting the protective film stripped from the surface B of the proton exchange membrane;
the second coating head is used for coating the second catalytic layer on the transfer roller;
the transfer roller is arranged on one side of the surface B of the proton exchange membrane, a heating source is arranged in the transfer roller, the transfer roller adopts a second preset temperature to heat the second catalyst layer, and at least volatilizes the alcohol solvent in the second catalyst layer;
the pressing roller is positioned on one side of the surface A of the proton exchange membrane, is arranged opposite to the transfer roller, and is matched with the transfer roller to transfer the baked second catalyst layer to the surface B of the proton exchange membrane to obtain a CCM membrane electrode;
and the winding mechanism is used for winding the CCM membrane electrode.
As to the improvement of the utility model, the utility model discloses still include the second and toast the case, the second toasts the case and adopts the further stoving of third predetermined temperature to the CCM membrane electrode.
As an improvement, the outer surface of the transfer roller is coated with a release layer.
As an improvement of the utility model, the release layer is made of polytetrafluoroethylene.
The utility model discloses owing to adopted the second catalysis layer of fuel cell membrane electrode to directly scribble in the transfer roller through second coating head, the transfer roller direct heating, through transfer roller direct heating dry second catalysis layer in the solvent, the second catalysis layer that has dried directly shifts to proton exchange membrane's structure through the pressfitting roller, does not need other transfer to come the rendition from type paper, can overcome when taking off from type paper, can take part catalysis layer from type paper, causes catalysis layer surface appearance incomplete, the inhomogeneous problem of catalysis layer thickness distribution; in addition, the second catalyst layer can be directly dried by directly heating the transfer roller under the condition of proper temperature and time adjustment, so that a second baking box can be omitted, the equipment cost can be saved, the production process can be saved, and the manufacturing cost of the CCM membrane electrode can be reduced.
Drawings
Fig. 1 is a block diagram of an embodiment of the method of the present invention.
Fig. 2 is a schematic structural view of an embodiment of the apparatus of the present invention.
Fig. 3 is a schematic structural diagram of another embodiment of fig. 2.
Detailed Description
Referring to fig. 1, fig. 1 shows a single roll transfer coating method for CCM membrane electrode of hydrogen fuel cell, the proton exchange membrane used in the present invention has two sides, wherein one side is labeled with a protection film called B side, and the other side is labeled with no protection film called a side a, comprising the following steps:
s1, coating a first catalytic layer on the surface A of the proton exchange membrane in a squeezing coating or blade coating mode, wherein the first catalytic layer can be a catalytic layer which takes Pt/C as a main component and takes an alcohol substance as a solvent, and the alcohol substance can be one or more of methanol, ethanol, propanol and isopropanol;
s2, baking the first catalytic layer in a drying oven at a first preset temperature, wherein the first preset temperature can be selected from 70-150 ℃, and the specific temperature is selected according to the components of the first catalytic layer;
s3, uncovering the protective film on the surface B of the proton exchange membrane to expose the surface B of the proton exchange membrane;
s4, coating a second catalyst layer on a transfer roller arranged on one side of the B surface of the proton exchange membrane in an extrusion coating mode, wherein a heating source is arranged in the transfer roller, the heating source can be an electric heating source or an oil heating source, and is heated by the transfer roller at a second preset temperature, the second preset temperature can be selected from 80 ℃ to 200 ℃, and at least an alcohol solvent in the second catalyst layer is volatilized; in the utility model, the diameter of the transfer roller, the rotating speed and the temperature of the transfer roller are such that when the extrusion coating head coats the second catalyst layer on the transfer roller and the transfer roller rotates to contact with the B surface of the proton exchange membrane, the second catalyst layer is basically dried or at least the alcohol substances in the second catalyst layer are volatilized;
s5, under the cooperation that sets up in the pressfitting roller of proton exchange membrane A face one side, the second catalysis layer that the transfer roller will be toasted shifts to proton exchange membrane' S B face and obtains the CCM membrane electrode, the utility model provides a pressfitting roller is rubber pressfitting roller.
Preferably, after the step S5, there is step S6, further baking the CCM membrane electrode at a third predetermined temperature, where the third predetermined temperature may be selected from 70 ℃ to 150 ℃, and the specific temperature depends on the composition of the second catalytic layer.
Preferably, a release layer is coated on the outer surface of the transfer roller.
Preferably, the release layer is a polytetrafluoroethylene release layer.
Referring to fig. 2 and 3, fig. 2 and 3 disclose a single roll transfer coating apparatus for a hydrogen fuel cell CCM membrane electrode, suitable for roll-to-roll coating, comprising:
the unwinding mechanism 1 is used for unwinding the proton exchange membrane 11, wherein the proton exchange membrane has two surfaces, one surface is pasted with a protective film and called a surface B, and the other surface is not pasted with the protective film and called a surface A;
the first coating head 2 is an extrusion coating head, and is used for coating a first catalyst layer 12 on the surface A of a proton exchange membrane 11, wherein the first catalyst layer 12 can be a catalyst layer with Pt/C as a main component and a solvent as an alcohol substance, and the alcohol substance can be one or more of methanol, ethanol, propanol and isopropanol;
the first baking oven 3 is used for baking the first catalytic layer 12 at a first preset temperature, wherein the first preset temperature can be selected from 70-150 ℃, and the specific temperature is determined according to the components of the first catalytic layer;
the protective film winding mechanism 4 is used for collecting the protective film 13 stripped from the surface B of the proton exchange membrane 11;
the second coating head 5 is used for coating the transfer roller 6 with a second catalyst layer 14, and the second coating head 5 in the utility model is an extrusion coating head;
the transfer roller 6 is arranged on one side of the surface B of the proton exchange membrane 11, a heating source 61 is arranged in the transfer roller 6, the heating source 61 can be an electric heating source or an oil heating source, the transfer roller 6 adopts a second preset temperature to heat the second catalytic layer 14, the second preset temperature can be selected from 80 ℃ to 200 ℃, and at least the alcohol solvent in the second catalytic layer 14 is volatilized; in the utility model, the diameter of the transfer roller 6, the rotating speed and the temperature of the transfer roller 6 are such that after the second coating head 5 coats the second catalyst layer 14 on the transfer roller 6, when the transfer roller 6 rotates to contact with the B surface of the proton exchange membrane 11, the second catalyst layer 14 is basically dried or at least the alcohol substance in the second catalyst layer 14 is volatilized, and after the second catalyst layer 14 does not have the alcohol substance, the problem of swelling can not occur after being transferred to the B surface of the proton exchange membrane 11;
in order to accurately control the thickness and temperature of the second catalyst layer on the transfer roller 6, a laser thickness tester and a temperature sensor can be additionally arranged and are respectively used for measuring the thickness and temperature of the second catalyst layer, the thickness value and the temperature value of the second catalyst layer are transmitted to a control device, the control device is used for adjusting the coating amount of the second coating head 5 and controlling the temperature of a heating source 61 to enable the temperature of the second catalyst layer to meet the process requirements; the rotating speed of the transfer roller 6 can also be measured by a rotating speed measuring instrument, the measured rotating speed value is transmitted to a control device, and the rotating speed of the transfer roller 6 is adjusted by the control device;
the pressing roller 7 is positioned on one side of the surface A of the proton exchange membrane 11, is arranged opposite to the transfer roller 6, and is matched with the transfer roller 6 to transfer the baked second catalytic layer 14 to the surface B of the proton exchange membrane 11 to obtain a CCM membrane electrode; the press-fit roller 7 in the utility model is made of rubber material;
and the winding mechanism 8 is used for winding the CCM membrane electrode.
The utility model provides a coating mode can be continuous coating, in intermittent type coating, stripe coating and the zebra coating one of, perhaps coats according to the design pattern of customer's needs.
In order to further dry the CCM membrane electrode, the utility model also comprises a second baking oven 9, and the second baking oven 9 further bakes the CCM membrane electrode at a third preset temperature; the third predetermined temperature may be selected from 70-150 degrees celsius, depending on the composition of the second catalytic layer.
In order to facilitate the separation of the second catalytic layer from the transfer roller 6, a release layer 62 is coated on the outer surface of the transfer roller 6; the release layer 62 may be a teflon release layer.
Claims (8)
1. A single-roller transfer coating device of hydrogen fuel cell CCM membrane electrode, which is suitable for roll-to-roll coating and is characterized by comprising:
the unwinding mechanism (1) is used for unwinding a proton exchange membrane (11), wherein the proton exchange membrane is provided with two surfaces, one surface is pasted with a protective film and is called a surface B, and the other surface is not pasted with the protective film and is called a surface A;
a first coating head (2) for coating a first catalyst layer (12) on the A surface of the proton exchange membrane (11);
a first baking oven (3) for baking the first catalytic layer (12) at a first predetermined temperature;
the protective film winding mechanism (4) is used for collecting the protective film (13) stripped from the surface B of the proton exchange membrane (11);
a second coating head (5) for coating the transfer roll (6) with a second catalytic layer (14);
the transfer roller (6) is arranged on one side of the surface B of the proton exchange membrane (11), a heating source (61) is arranged in the transfer roller (6), the transfer roller (6) heats the second catalytic layer (14) at a second preset temperature, and at least volatilizes alcohol solvents in the second catalytic layer;
the pressing roller (7) is positioned on one side of the surface A of the proton exchange membrane (11), is arranged opposite to the transfer roller (6), and is matched with the transfer roller (6) to transfer the baked second catalyst layer (14) to the surface B of the proton exchange membrane (11) to obtain a CCM membrane electrode;
and the winding mechanism (8) is used for winding the CCM membrane electrode.
2. The single-roller transfer coating device for the CCM membrane electrode of the hydrogen fuel cell according to claim 1, further comprising a second baking oven (9), wherein the second baking oven (9) further bakes the CCM membrane electrode at a third predetermined temperature.
3. The single-roll transfer coating device for hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that a release layer (62) is coated on the outer surface of the transfer roll (6).
4. The single-roll transfer coating device for hydrogen fuel cell CCM membrane electrode according to claim 3, characterized in that the release layer (62) is a polytetrafluoroethylene release layer.
5. The single-roll transfer coating apparatus for a hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that the first predetermined temperature is selected between 70 ℃ and 150 ℃.
6. The single-roll transfer coating apparatus for a hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that the second predetermined temperature is selected between 80 degrees Celsius and 200 degrees Celsius.
7. The single roll transfer coating apparatus for a hydrogen fuel cell CCM membrane electrode of claim 2, wherein said third predetermined temperature is selected between 70 degrees Celsius and 150 degrees Celsius.
8. The single-roller transfer printing coating equipment of the hydrogen fuel cell CCM membrane electrode according to the claim 1 or 2, which is characterized by further comprising a control device, a laser thickness tester and a temperature sensor, wherein the control device, the laser thickness tester and the temperature sensor are respectively used for measuring the thickness and the temperature of the second catalyst layer, transmitting the thickness value and the temperature value of the second catalyst layer to the control device, adjusting the coating amount of the second coating head (5) by the control device, and controlling the temperature of the heating source (61) to make the temperature of the second catalyst layer meet the process requirements; the rotational speed of the transfer roll (6) can also be measured by a rotational speed measuring instrument, and the measured rotational speed value is transmitted to a control device, and the rotational speed of the transfer roll (6) is adjusted by the control device.
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| CN201921092719.7U CN209981373U (en) | 2019-07-12 | 2019-07-12 | Single-roller transfer printing coating equipment for hydrogen fuel cell CCM membrane electrode |
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| CN201921092719.7U CN209981373U (en) | 2019-07-12 | 2019-07-12 | Single-roller transfer printing coating equipment for hydrogen fuel cell CCM membrane electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110265672A (en) * | 2019-07-12 | 2019-09-20 | 深圳市信宇人科技股份有限公司 | Single roller transfer coating apparatus of hydrogen fuel cell CCM membrane electrode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110265672A (en) * | 2019-07-12 | 2019-09-20 | 深圳市信宇人科技股份有限公司 | Single roller transfer coating apparatus of hydrogen fuel cell CCM membrane electrode |
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