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CN-121972375-A - Slit type roll-to-roll knife coating equipment and method for membrane electrode preparation

CN121972375ACN 121972375 ACN121972375 ACN 121972375ACN-121972375-A

Abstract

The application discloses slit type roll-to-roll knife coating equipment for membrane electrode preparation and a method thereof, and relates to the technical field of new energy equipment manufacture, wherein the slit type roll-to-roll knife coating equipment for membrane electrode preparation comprises a winding and unwinding component, a pretreatment component, a coating component and a drying component, wherein the winding and unwinding component is used for bearing and controllably releasing a substrate roll, and the pretreatment component is used for modifying a substrate; the application can realize continuous or semi-continuous operation from unreeling, pretreatment, precise coating to instant drying of the base material, and solves the problems of large volume, multiple consumables, complex operation and the like of the existing industrial production and preparation equipment.

Inventors

  • XING WEI
  • DAI JINRUI
  • LIU CHANGPENG
  • LI CHENYANG
  • XIAO MEILING
  • JIN ZHAO
  • LIANG LIANG

Assignees

  • 中国科学院长春应用化学研究所

Dates

Publication Date
20260505
Application Date
20260206

Claims (10)

  1. 1. Slit type roll-to-roll knife coating equipment for preparing a membrane electrode is characterized by comprising the following components: The winding and unwinding assembly (1), the winding and unwinding assembly (1) is used for bearing and controllably releasing the substrate roll; A pretreatment component (2), wherein the pretreatment component (2) is arranged at the head part of the retraction assembly (1) and is used for modifying the base material; the coating component (3) is arranged in the middle of the accommodating component (1) and is used for scraping and coating the sizing agent on the base material; And the drying assembly (4) is arranged at the tail part of the accommodating assembly (1) and is used for drying and solidifying the slurry on the base material.
  2. 2. Slit roll-to-roll doctor blade apparatus for membrane electrode preparation according to claim 1, characterized in that the winding and unwinding assembly (1) comprises an unwinding roller (101) and a winding roller (102), the unwinding roller (101) and the winding roller (102) being arranged at intervals and the rotational speeds of the unwinding roller (101) and the winding roller (102) being adjustable.
  3. 3. Slit roll-to-roll doctor blade apparatus for membrane electrode preparation according to claim 2, characterized in that the unwind roll (101) and the wind-up roll (102) are provided with a deviation rectifying stopper (103), the deviation rectifying stopper (103) being mounted at the edge of the substrate roll.
  4. 4. Slit roll-to-roll doctor blade apparatus for membrane electrode preparation according to claim 2, characterized in that the pretreatment means (2) is a plasma surface treatment apparatus.
  5. 5. Slit roll-to-roll doctor apparatus for membrane electrode preparation according to claim 2, characterized in that the coating assembly (3) comprises a slit-type coating head (301) and a doctor blade (302), the doctor blade (302) being used for the distribution of the slurry on the substrate, the discharge slit width of the coating head (301) being adjustable, the doctor blade (302) being used for the levelling of the slurry.
  6. 6. The slit roll-to-roll doctor apparatus for membrane electrode preparation according to claim 5, wherein said coating assembly (3) further comprises a bracket (303), said coating head (301) and said doctor blade (302) being mounted on said bracket (303), said bracket (303) being capable of adjusting a contact angle and a gap of said coating head (301) and said doctor blade (302) with said substrate.
  7. 7. Slit roll-to-roll doctor blade apparatus for membrane electrode preparation according to claim 6, characterized in that the coating head (301) is connected with a silo (305) through a feed delivery pipe (304), the feed delivery pipe (304) being provided with a metering pump (306).
  8. 8. Slit roll-to-roll doctor blade apparatus for membrane electrode preparation according to claim 2, characterized in that the drying assembly (4) comprises a drying station in which a heating element is arranged, the temperature of which heating element can be adjusted.
  9. 9. Slit roll-to-roll doctor blade apparatus for membrane electrode preparation according to claim 2, further comprising a tension buffer assembly comprising a plurality of driven rolls (5), said driven rolls (5) being arranged on both sides of said coating assembly (3) and said drying assembly (4), said driven rolls (5) being coated with a flexible material.
  10. 10. Slit roll-to-roll doctor blade method for producing a membrane electrode, characterized by using the slit roll-to-roll doctor blade apparatus for producing a membrane electrode according to any one of claims 2 to 9, comprising: the substrate roll is arranged on the unreeling roller (101), and after the substrate is guided to sequentially pass through the pretreatment component (2), the coating component (3) and the drying component (4), the substrate roll is arranged on the reeling roller (102); The method comprises the steps of controlling the movement of a base material, sequentially removing microscopic pollutants on the surface of the base material through a pretreatment component (2) and simultaneously enhancing the surface hydrophilicity and the adhesive strength, realizing uniform coating of the slurry on the base material through a coating component (3), and drying and curing the slurry on the base material through a drying component (4); And rewinding and collecting the dried base material and the dried sizing agent through the winding roller (102).

Description

Slit type roll-to-roll knife coating equipment and method for membrane electrode preparation Technical Field The application relates to the technical field of manufacturing of new energy equipment, in particular to slit type roll-to-roll knife coating equipment and method for preparing a membrane electrode. Background Membrane electrodes in solid electrolyte membrane hydrogen-electricity conversion devices (such as proton exchange membrane electrolytic cells and fuel cells) are the core components that achieve high-efficiency conversion. In the laboratory research and development and small-scale trial-manufacture stages, the preparation of the membrane electrode catalytic layer usually depends on a single-piece process such as manual knife coating, spraying and the like. The method is simple and flexible, but has inherent limitations of low efficiency, poor consistency among batches, insufficient controllability of process parameters and the like, and experimental samples with good comparability and repeatability are difficult to obtain, so that the efficiency and reliability of new material system evaluation, process optimization and basic research are severely restricted. In order to improve the production efficiency, the prior art directly uses standard roll-to-roll equipment suitable for industrial production in laboratory research and development, and has various inadaptability such as huge system, complex operation, large consumption (substrate and slurry) and difficulty in quickly and flexibly adjusting process parameters to meet the requirement of frequent research and development trial-and-error. Disclosure of Invention In view of the above, the present application aims to provide a slit type roll-to-roll knife coating device for preparing a membrane electrode, which can realize continuous or semi-continuous operation from unreeling, pretreatment, precise coating to instant drying of a substrate, and solve the problems of large volume, multiple consumables, complex operation, etc. of the existing industrial production preparation device. To achieve the above object, the present application provides a slit type roll-to-roll doctor blade apparatus for preparing a membrane electrode, comprising: the winding and unwinding assembly is used for bearing and controllably releasing the substrate roll; A pretreatment part which is arranged at the head part of the retraction assembly and is used for modifying the base material; The coating component is arranged in the middle of the collecting and releasing component and is used for scraping and coating the sizing agent on the base material; and the drying assembly is arranged at the tail part of the retraction assembly and is used for drying and solidifying the slurry on the base material. Preferably, the winding and unwinding assembly comprises an unwinding roller and a winding roller, wherein the unwinding roller and the winding roller are arranged at intervals, and the rotating speeds of the unwinding roller and the winding roller can be adjusted. Preferably, the unreeling roller and the reeling roller are provided with a deviation rectifying baffle, and the deviation rectifying baffle is arranged at the edge of the base material roll. Preferably, the pretreatment component is a plasma surface treatment device. Preferably, the coating assembly comprises a slit type coating head and a scraper, wherein the scraper is used for distributing the slurry on the base material, the width of a discharge slit of the coating head is adjustable, and the scraper is used for leveling the slurry. Preferably, the coating assembly further comprises a bracket, wherein the coating head and the scraper are mounted on the bracket, and the bracket can adjust the contact angle and the gap between the coating head and the scraper and the substrate. Preferably, the coating head is connected with a feed bin through a feed conveying pipe, and the feed conveying pipe is provided with a metering pump. Preferably, the drying assembly comprises a drying table, wherein a heating component is arranged in the drying table, and the temperature of the heating component can be adjusted. Preferably, the device further comprises a tension buffer assembly, wherein the tension buffer assembly comprises a plurality of driven rollers, the driven rollers are arranged on two sides of the coating assembly and the drying assembly, and flexible materials are coated on the outer sides of the driven rollers. A slit type roll-to-roll knife coating method for preparing a membrane electrode, which uses the slit type roll-to-roll knife coating equipment for preparing the membrane electrode, comprises the following steps: the substrate roll is arranged on the unreeling roller, and after the substrate is guided to sequentially pass through the pretreatment component, the coating component and the drying component, the substrate roll is arranged on the reeling roller; The method comprises the steps of controlling