Carbon dioxide electrolysis cell and carbon dioxide electrolysis device

Abstract

A carbon dioxide electrolysis cell of the present invention is a raw material solution supply type carbon dioxide electrolysis cell, including a cathode section, an anode section and a diaphragm, wherein, at one end, which is a short side of a cathode-side solution flow path forming member, a plurality of cathode-side solution supply holes and a plurality of anode-side solution supply holes are provided alternately, and at the other end, a plurality of cathode-side solution discharge holes and a plurality of anode-side solution discharge holes are provided alternately, wherein, at one end of an anode-side solution flow path forming member, a plurality of anode-side solution supply holes are provided, and at the other end, a plurality of anode-side solution discharge holes are provided, and wherein the plurality of cathode-side solution supply holes and the plurality of anode-side solution supply holes are arranged alternately, and the plurality of cathode-side solution discharge holes and the plurality of anode-side solution discharge holes are arranged alternately.

What is claimed is: 
     
         1 . A carbon dioxide electrolysis cell,
 being a raw material solution supply type, and comprising:   a cathode section having a cathode-side solution flow path, an anode section having an anode-side solution flow path, and a diaphragm arranged between the cathode section and the anode section,   wherein the cathode section includes a cathode including a gas diffusion layer and a cathode catalyst layer, and a cathode-side solution flow path forming member that forms a cathode-side solution flow path between itself and the cathode,   wherein the anode section includes an anode and an anode-side solution flow path forming member that forms an anode-side solution flow path between itself and the anode,   wherein both the cathode-side solution flow path forming member and the anode-side solution flow path forming member have a rectangular shape in a plan view in the direction in which the cathode section, the diaphragm and the anode section are stacked,   wherein, at one end of the cathode-side solution flow path forming member, which is one short side of the pair of opposing short sides of the rectangular shape, a plurality of cathode-side solution supply holes for supplying a cathode-side solution to the cathode-side solution flow path are provided, and at the other end of the cathode-side solution flow path forming member, which is the other short side of the pair of the opposing short sides, a plurality of cathode-side solution discharge holes for discharging a cathode-side solution are provided,   wherein, at one end of the anode-side solution flow path forming member, which is one short side of the pair of opposing rectangular short sides of the rectangular shape, a plurality of anode-side solution supply holes for supplying an anode-side solution to the anode-side solution flow path are provided, and at the other end of the anode-side solution flow path forming member, which is the other short side of the pair of the opposing short sides, a plurality of anode-side solution discharge holes for discharging an anode-side solution are provided, and   wherein, in a plan view in the stacking direction, the plurality of cathode-side solution supply holes and the plurality of anode-side solution supply holes are arranged alternately, and the plurality of cathode-side solution discharge holes and the plurality of anode-side solution discharge holes are arranged alternately.   
     
     
         2 . The carbon dioxide electrolysis cell according to  claim 1 ,
 wherein the order in which the plurality of cathode-side solution discharge holes and the plurality of anode-side solution discharge holes are arranged alternately is opposite to the order in which the plurality of cathode-side solution supply holes and the plurality of anode-side solution supply holes are arranged alternately,   wherein the plurality of cathode-side solution supply holes and the plurality of cathode-side solution discharge holes are arranged at mutually shifted positions on the pair of the opposing short sides, and   wherein the plurality of anode-side solution supply holes and the plurality of anode-side solution discharge holes are arranged at mutually shifted positions on the pair of the opposing short sides.   
     
     
         3 . A carbon dioxide electrolysis device, comprising:
 the carbon dioxide electrolysis cell according to  claim 1 , a first power supplying body, a second power supplying body, and a power source device.   
     
     
         4 . A carbon dioxide electrolysis device, comprising:
 the carbon dioxide electrolysis cell according to claim  2 , a first power supplying body, a second power supplying body, and a power source device.   
     
     
         5 . A carbon dioxide electrolysis device, comprising:
 the plurality of carbon dioxide electrolysis cells according to  claim 1 , and further comprising a first power supplying body, a second power supplying body, and a power source device.   
     
     
         6 . A carbon dioxide electrolysis device, comprising:
 the plurality of carbon dioxide electrolysis cells according to claim  2 , and further comprising a first power supplying body, a second power supplying body, and a power source device.   
     
     
         7 . The carbon dioxide electrolysis device according to  claim 5 ,
 wherein cathode-side solution supply manifolds that supply a cathode-side solution to the cathode-side solution flow path of the plurality of carbon dioxide electrolysis cells and anode-side solution supply manifolds that supply an anode-side solution to the anode-side solution flow path of the plurality of carbon dioxide electrolysis cells are arranged alternately,   wherein cathode-side solution discharge manifolds that discharge a cathode-side solution from the cathode-side solution flow path of the plurality of carbon dioxide electrolysis cells and anode-side solution discharge manifolds that discharge an anode-side solution from the anode-side solution flow path of the plurality of carbon dioxide electrolysis cells are arranged alternately,   wherein the order in which the plurality of cathode-side solution discharge holes and the plurality of anode-side solution discharge holes are arranged alternately is opposite to the order in which the plurality of cathode-side solution supply holes and the plurality of anode-side solution supply holes are arranged alternately,   wherein the plurality of cathode-side solution supply holes and the plurality of cathode-side solution discharge holes are arranged at mutually shifted positions on the pair of the opposing short sides, and   wherein the plurality of anode-side solution supply holes and the plurality of anode-side solution discharge holes are arranged at mutually shifted positions on the pair of the opposing short sides.   
     
     
         8 . The carbon dioxide electrolysis device according to  claim 6 ,
 wherein cathode-side solution supply manifolds that supply a cathode-side solution to the cathode-side solution flow path of the plurality of carbon dioxide electrolysis cells and anode-side solution supply manifolds that supply an anode-side solution to the anode-side solution flow path of the plurality of carbon dioxide electrolysis cells are arranged alternately,   wherein cathode-side solution discharge manifolds that discharge a cathode-side solution from the cathode-side solution flow path of the plurality of carbon dioxide electrolysis cells and anode-side solution discharge manifolds that discharge an anode-side solution from the anode-side solution flow path of the plurality of carbon dioxide electrolysis cells are arranged alternately,   wherein the order in which the plurality of cathode-side solution discharge holes and the plurality of anode-side solution discharge holes are arranged alternately is opposite to the order in which the plurality of cathode-side solution supply holes and the plurality of anode-side solution supply holes are arranged alternately,   wherein the plurality of cathode-side solution supply holes and the plurality of cathode-side solution discharge holes are arranged at mutually shifted positions on the pair of the opposing short sides, and   wherein the plurality of anode-side solution supply holes and the plurality of anode-side solution discharge holes are arranged at mutually shifted positions on the pair of the opposing short sides.