| 摘要 |
A method of manufacturing a membrane-electrolyte assembly by a solution three-layer coating method enables the manufacture of a membrane-electrolyte assembly having a high generation efficiency in which the seeping of the electrolyte solution into the pores in the catalyst layer is prevented. The method comprises performing the application of individual inks and drying treatment for a first catalyst layer 10, an electrolyte layer 20, and a second catalyst layer 30 in order to manufacture a membrane-electrolyte assembly 40. A pore-forming agent 5 is added in the ink for the first catalyst layer 10, the agent consisting of a substance that remains at temperature at which the first catalyst layer 10 is subjected to drying treatment and that dissolves or sublimates and disappears at temperature at which the electrolyte membrane 20 is subjected to drying treatment. The ink for the electrolyte layer 20 is applied to the first catalyst layer 10. Pores in the first catalyst layer 10 are blocked with the pore-forming agent 5 so that the electrolyte does not seep into the first catalyst layer 10. The electrolyte layer 20 is subjected to drying treatment at temperature higher than the temperature of drying treatment of the first catalyst layer 10. As a result, the pore-forming agent 6 in the first catalyst layer 10 dissolves or sublimates and disappears, thereby forming pores 6.
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