CN209981372U - Double-roller transfer coating device for hydrogen fuel cell CCM membrane electrode - Google Patents
Double-roller transfer coating device for hydrogen fuel cell CCM membrane electrode Download PDFInfo
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- CN209981372U CN209981372U CN201921092713.XU CN201921092713U CN209981372U CN 209981372 U CN209981372 U CN 209981372U CN 201921092713 U CN201921092713 U CN 201921092713U CN 209981372 U CN209981372 U CN 209981372U
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- Y02E60/30—Hydrogen technology
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Abstract
A double-roller transfer printing coating device of hydrogen fuel cell CCM membrane electrode comprises an unreeling mechanism used for unreeling proton exchange membrane; the first coating head is used for coating the first catalytic layer on the first transfer roller; a first transfer roll that heats the first catalytic layer with a first predetermined temperature; the first pressing roller is matched with the first transfer roller to transfer the baked first catalyst layer to the A surface of the proton exchange membrane; 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 a second catalytic layer on the second transfer roller; a second transfer roll to heat the second catalytic layer with a second predetermined temperature; the second pressing roller is matched with the second transfer roller to transfer the baked second catalyst 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 a double-roller transfer printing coating device of 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 double-roller transfer printing coating method and a device thereof 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: a double-roller transfer coating method for CCM membrane electrode of hydrogen fuel cell is provided, the proton exchange membrane used has two surfaces, one surface is pasted with a protective film and called B surface, the other surface is not pasted with a protective film and called A surface, the method comprises the following steps:
s1, coating a first catalytic layer on a first transfer roller arranged on one side of the A surface of the proton exchange membrane, arranging a first heating source in the first transfer roller, heating by adopting a first preset temperature through the first transfer roller, and at least volatilizing the alcohol solvent in the first catalytic layer;
s2, under the coordination of a first pressing roller arranged on one side of the B surface of the proton exchange membrane, the first transfer roller transfers the baked first catalyst layer to the A surface of the proton exchange membrane;
s3, uncovering the protective film on the B surface of the proton exchange membrane;
s4, coating a second catalyst layer on a second transfer roller arranged on one side of the B surface of the proton exchange membrane, wherein a second heating source is arranged in the second transfer roller, and the second 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 second transfer roller under the matching of the second pressing roller arranged on the A surface side of the proton exchange membrane to obtain the CCM membrane electrode.
As an improvement of the present invention, after the step S2, there is further baking step S21 at a fourth predetermined temperature for the first catalyst layer.
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, the first predetermined temperature and the second predetermined temperature are selected between 80 degrees Celsius and 200 degrees Celsius.
The utility model also provides a two roller 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 the first catalytic layer on the first transfer roller;
the first transfer roller is arranged on one side of the A surface of the proton exchange membrane, a heating source is arranged in the first transfer roller, the first transfer roller adopts a first preset temperature to heat the first catalyst layer, and at least volatilizes the alcohol solvent in the first catalyst layer;
the first pressing roller is positioned on one side of the surface B of the proton exchange membrane, is arranged opposite to the first transfer roller, and is matched with the first transfer roller to transfer the baked first catalyst layer to the surface A of the proton exchange membrane;
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 a second catalytic layer on the second transfer roller;
the second transfer roller is arranged on one side of the surface B of the proton exchange membrane, a heating source is arranged in the second transfer roller, the second 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 second pressing roller is positioned on one side of the surface A of the proton exchange membrane, is arranged opposite to the second transfer roller, and is matched with the second 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 an improvement, the utility model discloses still include first toast the case, adopt the fourth predetermined temperature to further toast first catalysis layer.
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 right the utility model discloses an it is first from the type layer to scribble on the surface of first transfer roller scribble the second from the type layer on the surface of transfer roller.
The utility model discloses owing to adopted the catalysis layer of fuel cell membrane electrode to directly scribble in the transfer roller through scribbling the leftover of bolt of cloth, the transfer roller directly heats, directly transfers the structure on proton exchange membrane through the pressfitting roller with the catalysis layer of heating drying through the transfer roller, does not need other transfer to come the rendition from type paper, can overcome when taking off type paper, can take part catalysis layer from type paper, causes the incomplete problem of catalysis layer surface appearance, catalysis layer thickness distribution inhomogeneous; in addition, the catalyst layer can be directly dried by directly heating the transfer roller under the condition of proper temperature and time adjustment, so that a baking oven 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 twin-roll transfer coating method for CCM membrane electrode of hydrogen fuel cell, in the present invention, the proton exchange membrane has two surfaces, one surface of which is labeled as "B" surface, and the other surface of which is labeled as "a" surface without a protective film, comprising the following steps:
s1, coating a first catalytic layer on a first transfer roller arranged on one side of the A surface of the proton exchange membrane, arranging a first heating source in the first transfer roller, heating by adopting a first preset temperature through the first transfer roller, and at least volatilizing the alcohol solvent in the first catalytic layer; the first catalyst layer can be a catalyst layer which takes Pt/C as a main component and takes an alcohol substance as a solvent, wherein the alcohol substance can be one or more of methanol, ethanol, propanol and isopropanol; the first predetermined temperature can be selected from 70 ℃ to 150 ℃, and the specific temperature is selected according to the composition of the first catalytic layer;
in the utility model, the diameter of the first transfer roller, the rotating speed and the temperature of the first transfer roller are such that when the first extrusion coating head coats the first catalyst layer on the first transfer roller and the first catalyst layer on the first transfer roller rotates to contact with the A surface of the proton exchange membrane, the first catalyst layer is basically dried or at least the alcohol substances in the first catalyst layer are volatilized;
s2, under the coordination of a first pressing roller arranged on one side of the B surface of the proton exchange membrane, the first transfer roller transfers the baked first catalyst layer to the A surface of the proton exchange membrane; the first press roller in the utility model is a rubber press roller;
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 second transfer roller arranged on one side of the B surface of the proton exchange membrane in a second extrusion coating mode, wherein a second heating source is arranged in the second transfer roller, the second heating source can be an electric heating source or an oil heat source, and is heated by the second transfer roller at a second preset temperature, the second preset temperature can be selected from 80 ℃ to 200 ℃, and at least the alcohol solvent in the second catalyst layer is volatilized; in the utility model, the diameter of the second transfer roller, the rotating speed and the temperature of the second transfer roller are such that when the second extrusion coating head coats the second catalyst layer on the second transfer roller and the second catalyst layer is rotated to contact with the B surface of the proton exchange membrane when the second transfer roller is rotated, 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 second pressfitting roller of proton exchange membrane A face one side, the second shifts the second catalysis layer that the roller will be toasted and shifts to the B face of proton exchange membrane and obtain the CCM membrane electrode, the utility model provides a second 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 surfaces of the first transfer roller and the second transfer roller.
Preferably, the release layer is a polytetrafluoroethylene release layer.
Referring to fig. 2 and 3, fig. 2 and 3 disclose a two-roll transfer coating apparatus for a CCM membrane electrode of a hydrogen fuel cell, 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 catalytic layer 14 on a first transfer roller 21; the first catalytic layer 12 may be a catalytic layer with Pt/C as a main component and a solvent as an alcohol substance;
the first transfer roller 21 is arranged on one side of the surface A of the proton exchange membrane 11, a first heating source 212 is arranged in the first transfer roller 21, the first heating source 212 can be an electric heating source or an oil heating source, the first transfer roller 21 adopts a first preset temperature to heat the first catalyst layer 12, and at least volatilizes alcohol solvents in the first catalyst layer, the alcohol substances can be one or more of methanol, ethanol, propanol and isopropanol, the first preset temperature can be selected from 80 ℃ to 200 ℃, and the specific temperature is determined according to the components of the first catalyst layer; in the utility model, the diameter of the first transfer roller 21, the rotating speed and the temperature of the first transfer roller 21 are such that when the first coating head 2 coats the first catalyst layer 12 on the first transfer roller 21 and the first catalyst layer 12 on the first transfer roller 21 rotates to contact with the a surface of the proton exchange membrane 11, the first catalyst layer 12 is basically dried or at least the alcohol substances in the first catalyst layer 12 are volatilized, so that the following baking oven can be omitted, and the purposes of saving equipment and reducing the coating process are achieved;
in order to facilitate the detachment of the first catalytic layer 12 from the first transfer roller 21, a first release layer 211 is coated on the outer surface of the first transfer roller 21; the first release layer 211 may be a teflon release layer.
In order to accurately control the thickness and temperature of the first catalyst layer 12 on the first transfer roller 21, a first laser thickness tester and a first temperature sensor may be additionally provided, which are respectively used for measuring the thickness and temperature of the first catalyst layer 12, and transmitting the thickness value and temperature value of the first catalyst layer to the control device, and then the control device adjusts the coating amount of the first coating head 21, and controls the temperature of the first heating source 212 to make the thickness and temperature of the first catalyst layer meet the process requirements; the rotation speed of the first transfer roller 21 may be measured by a first rotation speed measuring instrument, and the measured rotation speed value is transmitted to the control device, and the control device adjusts the rotation speed of the first transfer roller 21;
the first pressing roller 22 is positioned on one side of the surface B of the proton exchange membrane 11, is arranged opposite to the first transfer roller 21, and is matched with the first transfer roller 21 to transfer the baked first catalyst layer 12 to the surface A of the proton exchange membrane 11; the first press roller 22 of the present invention is made of rubber material;
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 second transfer roller 6 is arranged on one side of the surface B of the proton exchange membrane 11, a second heating source 61 is arranged in the second transfer roller 6, the second heating source 61 can be an electric heating source or an oil heating source, the second transfer roller 6 heats the second catalyst layer 14 at a second preset temperature, the second preset temperature can be selected from 80 ℃ to 200 ℃, and at least the alcohol solvent in the second catalyst layer 14 is volatilized; in the utility model, the diameter of the second transfer roller 6, the rotating speed and the temperature of the second transfer roller 6 are such that when the second coating head 5 coats the second catalyst layer 14 on the second transfer roller 6, and the second catalyst layer 14 on the second 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 has no 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 second 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 the temperature of a heating source 61 is controlled 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 second pressing roller 7 is positioned on one side of the surface A of the proton exchange membrane 11, is arranged opposite to the second transfer roller 6, and is matched with the second 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 second 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 first catalytic layer, the present invention further comprises a first baking oven 3 for further baking the first catalytic layer 12 at a fourth predetermined temperature. The fourth predetermined temperature may be selected from 70-150 degrees celsius, depending on the composition of the first catalytic layer.
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 second transfer roller 6, a second release layer 62 is coated on the outer surface of the second transfer roller 6; the second release layer 62 may be a teflon release layer.
Claims (10)
1. A two-roll transfer coating device for CCM membrane electrode of hydrogen fuel cell, 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 transfer roller (21) with a first catalytic layer (12);
the first transfer roller (21) is arranged on one side of the A surface of the proton exchange membrane (11), a first heating source (212) is arranged in the first transfer roller (21), the first transfer roller (21) heats the first catalytic layer (12) at a first preset temperature, and at least volatilizes alcohol solvents in the first catalytic layer;
the first pressing roller (22) is positioned on one side of the surface B of the proton exchange membrane (11), is arranged opposite to the first transfer roller (21), and is matched with the first transfer roller (21) to transfer the baked first catalyst layer (12) to the surface A of the proton exchange membrane (11);
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 a second transfer roll (6) with a second catalytic layer (14);
the second transfer roller (6) is arranged on one side of the surface B of the proton exchange membrane (11), a second heating source (61) is arranged in the second transfer roller (6), the second transfer roller (6) adopts a second preset temperature to heat the second catalyst layer (14), and at least the alcohol solvent in the second catalyst layer is volatilized;
the second pressing roller (7) is positioned on one side of the A surface of the proton exchange membrane (11), is arranged opposite to the second transfer roller (6), and is matched with the second transfer roller (6) to transfer the baked second catalyst layer (14) to the B surface 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 apparatus for the two-roll transfer coating of a hydrogen fuel cell CCM membrane electrode according to claim 1, further comprising a first baking oven (3) for further baking the first catalytic layer (12) with a fourth predetermined temperature.
3. The twin roll transfer coating apparatus for hydrogen fuel cell CCM membrane electrodes of claim 1 or 2, further comprising a second baking oven (9), wherein the second baking oven (9) further bakes the CCM membrane electrodes at a third predetermined temperature.
4. The two-roll transfer coating device for hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that the second release layer (62) is coated on the outer surface of the second transfer roll (6).
5. The twin-roll transfer coating apparatus for hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that the first release layer (211) is coated on the outer surface of the first transfer roll (21).
6. The apparatus for two-roll transfer coating of a hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that the first and second predetermined temperatures are chosen between 80-200 degrees Celsius.
7. The apparatus of claim 2, wherein the fourth predetermined temperature is selected from a range of 70 degrees Celsius to 150 degrees Celsius.
8. The apparatus of claim 3, wherein the third predetermined temperature is selected from a range of 70 degrees Celsius to 150 degrees Celsius.
9. The twin-roll transfer coating device for hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that the diameter, the rotating speed and the temperature of the first transfer roll (21) are such that after the first coating head (2) coats the first catalytic layer (12) on the first transfer roll (21), the first catalytic layer (12) on the first transfer roll (21) is rotated to contact with the A surface of the proton exchange membrane (11), the first catalytic layer (12) is substantially dried or at least the alcohol in the first catalytic layer (12) is volatilized.
10. The two-roll transfer coating device for hydrogen fuel cell CCM membrane electrode according to claim 1 or 2, characterized in that the diameter, rotation speed and temperature of the second transfer roll (6) are such that after the second coating head (5) coats the second catalytic layer (14) on the second transfer roll (6), the second catalytic layer (14) on the second transfer roll (6) is rotated to contact with the B surface of the proton exchange membrane (11), the second catalytic layer (14) is substantially dried or at least the alcohol in the second catalytic layer (14) is volatilized.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247066A (en) * | 2019-07-12 | 2019-09-17 | 深圳市信宇人科技股份有限公司 | The double roller print-on coating equipment of hydrogen fuel cell CCM membrane electrode |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247066A (en) * | 2019-07-12 | 2019-09-17 | 深圳市信宇人科技股份有限公司 | The double roller print-on coating equipment of hydrogen fuel cell CCM membrane electrode |
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