Porous Electrode-Supported Electrolyte Membrane and Method for Manufacturing Same

Abstract

A porous electrode-supported electrolyte membrane according to the present embodiment includes an electrolyte membrane and a porous reduction electrode directly bonded onto the electrolyte membrane, in which the porous reduction electrode has an average pore diameter of 1 μm or more. In a step of bonding the electrolyte membrane and the porous reduction electrode, pressure is applied while heat is applied so that the electrolyte membrane is prevented from swelling.

1 . A porous electrode-supported electrolyte membrane used in a gas phase reduction device for reducing carbon dioxide, the porous electrode-supported electrolyte membrane comprising:
 an electrolyte membrane; and   a porous reduction electrode directly bonded onto the electrolyte membrane,   in which the porous reduction electrode has an average pore diameter of 1 μm or more.   
     
     
         2 . The porous electrode-supported electrolyte membrane according to  claim 1 , wherein
 the electrolyte membrane is thermocompression-bonded with the porous reduction electrode laid on the electrolyte membrane in such a way as to prevent swelling.   
     
     
         3 . A method of manufacturing a porous electrode-supported electrolyte membrane used in a gas phase reduction device for reducing carbon dioxide, the method comprising:
 a step of immersing an electrolyte membrane in boiling nitric acid and boiling pure water; and   a step of performing thermocompression bonding with a porous reduction electrode laid on a surface of the electrolyte membrane,   in which the porous reduction electrode after the thermocompression bonding has an average pore diameter of 1 μm or more.   
     
     
         4 . The method of manufacturing the porous electrode-supported electrolyte membrane according to  claim 3 , wherein
 the thermocompression bonding is performed at a heating temperature of 100° C. or higher and lower than 180° C.