| 摘要 |
PURPOSE:To prevent an electrolyte from being moved from an electrode catalyst layer to a carbon substrate and improve the reliability of operation by providing a porous water-repellent layer made of fluororesin between the electrode catalyst layer and the carbon substrate. CONSTITUTION:A net made of fluororesin of 50mum, for example, is mounted on a porous carbon substrate obtained by immersing the carbon substrate with the porosity of about 30% in a 3%-fluororesin dispersion in advance, for example, and baking and water-treating it, furthermore an electrode catalyst layer is mounted, they are bound together at the preset temperature and pressure to prepare an electrode 6 with a water-repellent layer 10. A net made of fluororesin fibers of 20mum can be used in place of the net made of fluororesin fibers of 50mum. |
