| 摘要 |
PROBLEM TO BE SOLVED: To prevent a surface of a catalyst layer from being cracked or rugged after dried.SOLUTION: A manufacturing method of a catalyst layer for a fuel cell includes applying a catalyst ink containing a solvent, an electrolytic resin and a catalyst carrier onto a transfer substrate, forming a catalyst layer and then drying the catalyst layer. The manufacturing method includes: a first drying step of setting a drying temperature during a constant-rate drying period in which the thickness of the catalyst layer is reduced together with evaporation of the solvent, equal to or higher than a boiling point of the solvent in the catalyst layer; and a second step, which is executed after the first drying step, of setting a drying temperature during a falling-rate drying period in which the thickness of the catalyst layer is maintained even after the solvent is evaporated, equal to or higher than a glass transformation temperature of the electrolytic resin in the catalyst layer and equal to or lower than a softening temperature of the transfer substrate. |
