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CN-121988409-A - Catalyst coated membrane for gas reaction and preparation method thereof

CN121988409ACN 121988409 ACN121988409 ACN 121988409ACN-121988409-A

Abstract

A catalyst coated film for gas reaction and a method of preparing the same, wherein the method includes providing a first substrate having a first surface, forming a first catalyst layer on the first surface of the first substrate, providing a second substrate having a friction coefficient in a range of 2-15 on the first catalyst layer, and pressing the first catalyst layer to the second substrate with a film-receiving pressure in a range of more than 0Kgf/cm 2 and less than or equal to 380Kgf/cm 2 to produce the catalyst coated film.

Inventors

  • LI GUANGZHE
  • LI JIAHONG
  • Cai qunxian

Assignees

  • 台湾奈米碳素股份有限公司

Dates

Publication Date
20260508
Application Date
20250717
Priority Date
20241107

Claims (15)

  1. 1. A method for preparing a catalyst coated membrane for gas reaction, comprising: providing a first substrate, wherein the first substrate is provided with a first surface; forming a first catalyst layer on the first surface of the first substrate; providing a second substrate having a friction coefficient in the range of 2-15 on the first catalyst layer, and And pressing the first catalyst layer on the second substrate under a film bearing pressure to prepare the catalyst coating film, wherein the film bearing pressure is in a range of more than 0Kgf/cm 2 and less than or equal to 380Kgf/cm 2 .
  2. 2. The method of claim 1, wherein the first substrate is a polymeric film.
  3. 3. The method of claim 1, further comprising: Heating the first substrate to a coating temperature, and The first catalyst layer is formed at the coating temperature.
  4. 4. The method of claim 1, wherein the coefficient of friction is a static coefficient of friction in the range of 5-15 and the film is subjected to a pressure in the range of greater than 0Kgf/cm 2 and less than or equal to 50Kgf/cm 2 .
  5. 5. The method of claim 1, wherein the coefficient of friction is a static coefficient of friction in the range of 10 "15 and the film is subjected to a pressure in the range of greater than 0Kgf/cm 2 and less than or equal to 10Kgf/cm 2 .
  6. 6. The method of claim 1, wherein the second substrate comprises at least one of a silicone gel, a rubber, a silicone rubber, and a polymer.
  7. 7. The method of claim 1, wherein the step of laminating is performed under a vacuum environment.
  8. 8. The method of claim 1, wherein the first substrate has a second surface, and the method further comprises: Heating the first substrate to a coating temperature, and A second catalyst layer is formed on the second surface of the first substrate at the coating temperature.
  9. 9. The method of claim 8, wherein at least one of the first catalyst layer and the second catalyst layer is coated in a roll-to-roll (R2R) coating method, brush coating method, ultrasonic coating method, knife coating method, transfer method, or screen printing method.
  10. 10. A catalyst coated film produced using the production method according to any one of claims 1 to 9.
  11. 11. A method for preparing a catalyst coated membrane for gas reaction, comprising: Providing a sandwich structure comprising a first substrate, a second substrate having a coefficient of friction, and a catalyst layer sandwiched between the first and second substrates, the coefficient of friction being in the range of 2-15, and The sandwich structure is pressed with a pressure in a range of more than 0Kgf/cm 2 and equal to or less than 380Kgf/cm 2 .
  12. 12. A catalyst coating process for gas reactions comprising: Providing a substrate, wherein the substrate is provided with a first surface, a second surface, and a first protective film and a second protective film for respectively protecting the first surface and the second surface; removing the first protective film; Coating a first catalyst layer on the first surface; covering a new protective layer on the first catalyst layer to replace the first protective film, wherein the new protective layer has a friction coefficient which is in the range of 2-15; removing the second protective film, and And coating a second catalyst layer on the second surface.
  13. 13. The method of claim 12, wherein the substrate is a polymeric film.
  14. 14. The method of claim 12, further comprising: And pressing the substrate, the first catalyst layer and the new protective layer by using pressure, wherein the pressure is in the range of more than 0Kgf/cm 2 and less than or equal to 380Kgf/cm 2 .
  15. 15. A catalyst coated membrane for gas reactions, comprising; a first substrate; A second substrate having a coefficient of friction in the range of 2-15, wherein the second substrate comprises at least one of silica gel, rubber, silicone rubber, and a polymer, and And a catalyst layer sandwiched between the first substrate and the second substrate.

Description

Catalyst coated membrane for gas reaction and preparation method thereof Technical Field The present invention relates to a catalyst coated film for gas reaction and a method for preparing the same, and more particularly, to a catalyst coated film comprising a substrate having a high friction coefficient and a method for preparing the same. Background The catalyst-coated membrane (CCM) can promote the occurrence of electrochemical reaction, and is widely applied to the technical fields of water electrolysis hydrogen production or oxygen production, carbon dioxide reduction, gas sensors, fuel cells and the like at present. The current CCM preparation methods are mainly a direct coating method and a transfer printing method. The transfer printing method is to coat the catalyst slurry onto the surface of the transfer medium, heat to remove the solvent and form the catalyst layer, and then transfer the catalyst layer onto the proton exchange membrane by hot pressing. The transfer printing method has the following defects that the process is complex, the preparation cost is high, the contact between the catalyst layer and the membrane is difficult to control during hot-pressing transfer printing, the contact edge of the membrane and the transfer medium is unevenly stressed, the membrane is easy to damage, part of catalyst is stuck to the transfer medium due to incomplete transfer printing in the transfer printing process, the catalyst utilization rate is reduced, and the transfer medium is easy to damage after repeated hot pressing and cannot be reused, so that the manufacturing cost is increased. The direct coating method is to prepare catalyst slurry with a large amount of solvent and then directly coat the catalyst slurry on the proton exchange membrane, so that the catalyst layer and the proton exchange membrane can be closely contacted, and further the preferable performance is achieved. Compared with the transfer printing method, the direct coating method has simpler process, and the catalyst layer can be closely contacted with the proton exchange membrane, so that the prepared CCM can achieve the preferable performance. However, the proton exchange membrane coated with the catalyst slurry is a flexible membrane with extremely thin thickness (for example, the thicknesses of Nafion 212 and Nafion 211 are only about 50 and 25 micrometers, respectively), which makes it difficult to fix the proton exchange membrane flatly when the catalyst slurry is coated. The prior art typically spreads the membrane over a planar substrate and then manually brushes the catalyst over the membrane, which is quite inefficient. In other highly efficient processes for direct coating (e.g., roll-to-roll (R2R) coating), suction is typically used to fix the proton exchange membrane (e.g., suction through a plurality of suction holes in a stage to allow the proton exchange membrane to be sucked against the stage surface under negative pressure (or vacuum)) for the coating process. In order to prevent the proton exchange membrane from moving under force during the direct coating process, a sufficient negative pressure (or vacuum) suction force must be supplied, however, such negative pressure suction force is liable to cause buckling or deformation of the extremely thin membrane. In addition, the proton exchange membrane is easy to be swelled and deformed when being wet and alcohol solvents, and the catalyst layer around the deformed area can be stripped when serious, thereby reducing the utilization rate and performance of the catalyst. Since the catalyst slurry generally contains solvents such as water and ethanol, the membrane is liable to be uneven during the direct coating process, and it is difficult to obtain a uniform CCM. To overcome this problem, the first and second side catalyst layers may be prepared by direct coating and transfer, respectively, or a solvent removal procedure may be added to the process. However, these all make the process more complex and reduce the production efficiency. Based on the above, the problems of surface unevenness and membrane deformation of CCM have become a major obstacle to the CCM preparation method, so there is an urgent need in the art for a CCM and a preparation method thereof that can overcome the problems of surface unevenness and membrane deformation of CCM. In view of the shortcomings of the prior art, the applicant finally conceived the catalyst coating film for gas reaction and the preparation method thereof through careful experiments and researches and a new and inexhaustible spirit, which can overcome the shortcomings of the prior art, and the following is a brief description of the present application. Disclosure of Invention The invention aims to provide a CCM capable of overcoming the problems of uneven surface and membrane deformation of the CCM and a preparation method thereof. The method can prepare CCM with high efficiency, and can avoid the problems of deformation, swe