Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of manufacturing for electrolyte membrane electrode joint body for fuel cell

An electrolyte membrane electrode and fuel cell technology, which is applied to fuel cell parts, battery electrodes, solid electrolyte fuel cells, etc., can solve problems such as catalyst layer cracking, fuel cell failure to obtain satisfactory battery characteristics, and mutual contamination of catalyst layers.

Inactive Publication Date: 2005-11-30
PANASONIC CORP
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the above-mentioned influence of tension and heat stretches the proton-conducting polymer membrane, resulting in a shift in the position where the catalyst layer is formed.
Also, when the proton-conducting polymer membrane after the catalyst layer was transferred on both sides was rolled into a roll, cracks and abrasions occurred in the catalyst layer.
Furthermore, the contact between the catalyst layer for the anode and the catalyst layer for the cathode occurred, and the problem of mutual contamination of both catalyst layers occurred.
Due to these problems, a fuel cell using the electrolyte membrane electrode assembly manufactured by the above-mentioned method cannot obtain satisfactory cell characteristics.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of manufacturing for electrolyte membrane electrode joint body for fuel cell
  • Method of manufacturing for electrolyte membrane electrode joint body for fuel cell
  • Method of manufacturing for electrolyte membrane electrode joint body for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] 1(a)-(e), an intermediate body 9 of an electrolyte membrane-electrode assembly having catalyst layers 4a and 4b formed on both sides of a proton-conducting polymer membrane 1 is produced, and a fuel cell is manufactured using it. First, a proton-conducting polymer membrane 1 with a film thickness of 30 μm is laminated on a first shape-retaining film 2 composed of a polyethylene terephthalate film with a film thickness of 190 μm to form a shape-retaining film as shown in FIG. 1( a ). Intermediate 3. The proton conductive polymer membrane 1 is made of perfluorocarbon sulfonic acid represented by the following formula (where x=5 to 13.5, y≈1000, m=1, n=2).

[0096]

[0097]The above proton conductive polymer membrane 1 is laminated on the first shape retaining membrane 2 by a so-called transfer method. Specifically, first, the proton-conducting polymer membrane 1 and the first shape-retaining membrane 2 formed in advance on a support membrane by a casting process are s...

Embodiment 2

[0108] 1(a)-(e), an intermediate body 9 of an electrolyte membrane-electrode assembly having catalyst layers 4a and 4b formed on both sides of a proton-conducting polymer membrane 1 is produced, and a fuel cell is manufactured using it.

[0109] First, an ethanol dispersion containing 91% by weight of the same perfluorocarbon sulfonic acid as used in Example 1 was coated on the first shape-retaining film 2 made of a polypropylene film with a film thickness of 50 μm, and dried. The speed of conveying the first shape-retaining film was set at 0.7 m / min. Coating method is blade height 0.16mm, overcoat 3 times. The coating film was left to dry at room temperature to form a proton-conducting polymer film 1 with a film thickness of 30 μm on the first shape-retaining film 2 . The intermediate 3 shown in Fig. 1(a) was produced by the above method.

[0110] There was almost no warpage or deformation in the intermediate body 3, and no damage such as microcracks or pinholes was observe...

Embodiment 3

[0117] according to image 3 In the order of (a) to (e), the catalyst layers 4a and 4b are respectively formed on both sides of the proton conductive polymer membrane 1, and the intermediate body 24 of the electrolyte membrane electrode assembly formed by combining the catalyst layers 4a and 4b with the gaskets 20a and 20b, and further Use it to make fuel cells.

[0118] First of all, it is made by the same method as in Example 1 image 3 (a) Intermediate 3 shown. In the intermediate body 3, there was almost no warpage or deformation, and no damage such as microcracks or pinholes was observed even in the proton conductive polymer membrane 1 itself, and the condition was good. In this intermediate body 3, the proton-conducting polymer membrane 1 and the holding membrane 2 are properly adhered to each other, so they cannot be peeled off even if they are bent with a radius of curvature (R) of about 50 mm. Then, make it with exactly the same method as Example 1 image 3 Interm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A method for producing an electrolyte membrane electrode assembly for a fuel cell according to this invention comprises the steps of: laminating a hydrogen-ion conductive polymer membrane on one face of a first shape-retaining film; forming a first catalyst layer on the hydrogen-ion conductive polymer membrane; joining a shape-retaining member to the first catalyst layer side of the hydrogen-ion conductive polymer membrane; removing the first shape-retaining film from the hydrogen-ion conductive polymer membrane; and forming a second catalyst layer on a face of the hydrogen-ion conductive polymer membrane exposed by the removal, so that the hydrogen-ion conductive polymer membrane and the catalyst layers are not damaged even when a thin hydrogen-ion conductive polymer membrane is used.

Description

technical field [0001] The present invention relates to a method for manufacturing an electrolyte membrane electrode assembly used in a fuel cell. Background technique [0002] The proton-conducting polymer membrane used in conventional fuel cells is very thin, so it is very difficult to directly form a catalyst layer on the proton-conducting polymer membrane. More specifically, conventional proton-conducting polymer membranes generally have a film thickness of about 20 μm to 50 μm, and the mechanical strength of the membrane itself is insufficient, so it is difficult to machine the membrane alone. During machining, the proton conductive polymer membrane often occurs, for example, stretching due to an applied load, simple cutting due to shear stress, and inadvertent bending to generate microcracks or pinholes. [0003] In order to avoid these problems, great care must be taken in handling the proton-conducting polymer membrane, which greatly reduces its operability. In add...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 松冈广彰小林晋堀喜博羽藤一仁保坂正人
Owner PANASONIC CORP