# US 2019/0245230 A1 · Method for manufacturing membrane electrode assembly for fuel cell

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- Number: US 2019/0245230 A1
- Document ID: US20190245230A1
- Status: Published application
- Kind: A1
- Application number: 16/338,159
- Filed: 2017-09-29
- Published: 2019-08-08
- Earliest claimed: 2016-09-30
- Assignees: Kolon Industries, Inc.
- Applicants: Kolon Industries, Inc.
- Inventors: Jin-Hwa LEE; Jun-Young KIM
- Web page: https://patentgrep.com/patent/US20190245230A1

## CPC

- H01M 8/1004: characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence)
- H01M 4/8814: {Temporary supports, e.g. decal}
- H01M 4/8828: {Coating with slurry or ink}
- H01M 4/8882: {Heat treatment, e.g. drying, baking}
- H01M 4/8896: {Pressing, rolling, calendering (membrane electrode assemblies H01M8/1004)}
- H01M 4/926: {on carbon or graphite}
- H01M 8/1018: Polymeric electrolyte materials
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A method for manufacturing a membrane electrode assembly for a fuel cell, in which uniform pressure is applied to the entire area of an electrode during a transferring process to ensure uniformity of products. The method includes an electrode forming step of forming an electrode layer by coating an electrode slurry on a support; a transferring step of aligning the electrode layer on both surfaces of an electrolyte membrane and applying heat and pressure to transfer the electrode layer; and removing the support, wherein in the transferring step, gas pressure is applied to a gas pressure platen of a stretchable material to transfer the electrode layer to the electrolyte membrane.

## Claims

### Claim 1

A method for manufacturing a membrane electrode assembly for a fuel cell, the method comprising:
an electrode forming step of forming an electrode layer by coating an electrode slurry on a support;
a transfer step of aligning the electrode layer on each of both surfaces of an electrolyte membrane and applying heat and pressure to transfer the electrode layer; and
a step of removing the support, wherein in the transfer step, gas pressure is applied to a gas pressure platen of a stretchable material to transfer the electrode layer to the electrolyte membrane.

### Claim 2 (depends on 1)

The method of claim 1, wherein, when applying gas pressure to the gas pressure platen in the transfer step, a chamber having gas filled therein is used.

### Claim 3 (depends on 2)

The method of claim 2, wherein the gas filled in the chamber is air.

### Claim 4 (depends on 1)

The method of claim 1, wherein the gas pressure platen is a silicone pad or a silicone rubber pad.

### Claim 5 (depends on 1)

The method of claim 1, wherein the transfer step comprises disposing the gas pressure platen on a top side of the support, closely adhering the support and the gas pressure platen to each other to form a vacuum between the support and the gas pressure platen, and pressurizing the support by applying gas pressure and temperature from an upper side using a chamber filled with gas.

### Claim 6 (depends on 1)

The method of claim 1, wherein the transfer step is performed at a transfer temperature of 50 to 200° C. and a transfer pressure of 5 to 200 kgf/cm2.

### Claim 7 (depends on 1)

The method of claim 1, wherein the support includes any one selected from the group consisting of a Teflon film, an imide film, a polyester film, a polyimide film, a polyamide film, a polyolefin film, a chlorine or fluorine-substituted polyolefin film, a perfluorinated polyolefin copolymer film, and a vinyl-based polymer film.

### Claim 8 (depends on 1)

The method of claim 1, wherein the electrode slurry includes a slurry comprising a catalyst, an ionomer or a carbon-based material, and a solvent.

### Claim 9 (depends on 1)

The method of claim 1, wherein the electrode forming step is performed by coating the electrode slurry to a thickness of 5 to 200 μm on the support.

### Claim 10 (depends on 1)

The method of claim 1, wherein the electrode forming step comprises the step of performing a natural drying, vacuum drying, hot air drying, near infrared ray (NIR) drying, or superheated steam drying process at room temperature to 150° C. after performing a coating process.