JP2015191826A5 - - Google Patents

Claims (7)

  A method for producing a gas diffusion electrode for use in a polymer electrolyte battery in which a microporous layer is formed on at least one surface of a conductive porous substrate, wherein the water repellent material and the dispersion medium are applied to the conductive porous substrate. A step (a) of applying a water-repellent treatment with a water-repellent material dispersion containing, and a step of applying a microporous layer coating liquid in which conductive fine particles, a water-repellent resin and a dispersion medium are kneaded to the conductive porous substrate A method for producing a gas diffusion electrode, wherein (b) is continuously performed in random order, and then the step (c) of collectively drying the water-repellent material dispersion and the microporous layer coating liquid is performed.   Before the step (a), the step (A) of unwinding the conductive porous substrate from the wound conductive porous substrate roll, the gas diffusion electrode after the step (c) 2. The method for producing a gas diffusion electrode according to claim 1, further comprising a step (B) of winding up the gas.   After the step (c), the water-repellent material contained in the water-repellent material dispersion and the water-repellent resin contained in the microporous layer coating liquid are melted to form a conductive porous substrate and conductive fine particles, respectively. The manufacturing method of the gas diffusion electrode of Claim 1 or 2 which has the process (d) to bind.   The surface of the conductive porous substrate at the time of applying the water repellent treatment in the step (a) and the surface of the conductive porous substrate at the time of applying in the step (b) are different from each other. The manufacturing method of the gas diffusion electrode in any one of.   A device for producing a gas diffusion electrode base material used in a polymer electrolyte fuel cell, in which a microporous layer is formed on at least one surface of the conductive porous base material, and is a long conductive porous material wound in a roll shape A first coater for providing a water repellent treatment with a water repellent dispersion containing a water repellent material and a dispersion medium, a conductive fine particle, a water repellent resin, and a dispersion. The second coater for applying the porous layer coating liquid containing the medium is provided in any order, and the dispersion medium is collectively collected from the conductive porous substrate coated with the water repellent dispersion and the microporous layer coating liquid. An apparatus for producing a gas diffusion electrode substrate, comprising: a dryer for drying; and a winder for winding the gas diffusion electrode substrate obtained via a drying furnace. The manufacturing apparatus of the gas diffusion electrode base material of Claim 5 provided with the sintering furnace for further heat-treating the electroconductive porous base material which passed through the drier, and sintering water-repellent resin.   The manufacturing apparatus of the gas diffusion electrode of Claim 5 or 6 with which the 1st coater and the 2nd coater were installed in the mutually opposite side with respect to the passage surface of an electroconductive porous base material.