Electrochemical reaction device

Abstract

In an electrochemical reaction device 10 that electrochemically reduces carbon dioxide, a first power supplying body 27 , a first gas flow path structure 24 , a cathode 21 , a liquid flow path structure 23 , an ion exchange membrane 26 , an anode 22 , a second gas flow path structure 25 , and a second power supplying body 28 are laminated in this order, an electrolyte flow path 31 is formed between the cathode 21 and the ion exchange membrane 26 , a cathode-side gas flow path 32 for supplying carbon dioxide gas is formed on a side of the cathode 21 opposite to the anode 22 , and an anode-side gas flow path 33 is formed on a side of the anode 22 opposite to the anode 21.

What is claimed is: 
     
         1 . An electrochemical reaction device that electrochemically reduces carbon dioxide, comprising:
 a cathode;   an anode;   an ion exchange membrane adjacent to a surface of the anode on the cathode side;   a liquid flow path structure which is provided between the cathode and the ion exchange membrane and forms an electrolyte flow path;   a first gas flow path structure which is provided on a side of the cathode opposite to the anode, and forms a cathode-side gas flow path for supplying carbon dioxide gas;   a second gas flow path structure which is provided on a side of the anode opposite to the cathode, and forms an anode-side gas flow path;   a first power supplying body provided on a side of the first gas flow path structure opposite to the cathode; and   a second power supplying body provided on a side of the second gas flow path structure opposite to the anode.   
     
     
         2 . The electrochemical reaction device according to  claim 1 , wherein
 a plurality of the electrolyte flow paths, the cathode-side gas flow paths, and the anode-side gas flow paths are respectively formed, and   between at least one set of the electrolyte flow paths, the cathode, the anode, and the ion exchange membrane are sandwiched by a part other than the flow path of the liquid flow path structure, the first gas flow path structure, and the second gas flow path structure.   
     
     
         3 . The electrochemical reaction device according to  claim 2 , wherein
 the number of the cathode-side gas flow paths, the electrolyte liquid flow paths, and the anode-side gas flow paths is the same, the cathode-side gas flow paths, the electrolyte liquid flow paths, and the anode-side gas flow paths are arranged so as to overlap each other when viewed from a thickness direction, and between all the adjacent electrolyte flow paths, the cathode, the anode, and the ion exchange membrane are sandwiched by a part other than the flow path of the liquid flow path structure, the first gas flow path structure, and the second gas flow path structure.