Manufacturing method of laminate for manufacturing fuel cell

Abstract

The present invention suppresses adhesion of a part of a release layer to an electrolyte membrane when a negative sheet is peeled from a fuel cell laminate. A manufacturing method of a laminate for manufacturing a fuel cell which uses a roll-to-roll technique includes: a first step of preparing a first laminate formed by stacking the release layer, the electrolyte membrane and an electrode layer in this order on a back sheet, a second step of stacking and bonding a gas diffusion layer on the electrode layer of the first laminate to obtain a second laminate, and a third step of peeling the back sheet from the second laminate to obtain a third laminate; and the bonding temperature in the second step is less than 170 DEG C., and a tension X (N) applied to the back sheet, and a conveyance speed Y (m / min) at which the second step to the third step are continuously executed satisfy a following equation (1).Y<=12.09exp (-0.15X)... (1).

Description

technical field [0001] The present disclosure relates to a method of manufacturing a laminate for a fuel cell. Background technique [0002] As a method for producing a laminate including an electrolyte membrane and a catalyst electrode layer constituting a fuel cell, a method based on a roll-to-roll method is known. For example, Patent Document 1 discloses a method of laminating the MEA sheet constituting the membrane electrode assembly and the GDL sheet constituting the gas diffusion layer by heating and pressurizing, and then performing a peeling step of peeling the back sheet from the MEA sheet. In this patent document 1, the temperature and pressure at the time of heat and pressure treatment are increased at the beginning end of the MEA sheet in the pulling direction compared with other parts, thereby increasing the contact between the beginning end of the MEA sheet and the GDL sheet. The adhesion force is used to suppress the adhesion of the MEA sheet to the back shee...

AI Technical Summary

Problems solved by technology

In such a method, the inventors of the present application have newly discovered that, in order to facilitate the peeling of the back sheet, it is preferable to provide a release layer including a release agent between the back sheet and the electrolyte membrane. conditions, in the peeling process, there is a problem that a part of the release layer that should remain on the back sheet adheres to the electrolyte membrane

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