Operating method of anion-exchange membrane-type fuel cell
A stable, high output is obtained with an anion exchange membrane-type fuel cell that generates electricity when air is supplied. An operating method for an anion exchange membrane-type fuel cell includes an anion exchange membrane electrode assembly for which an anode is joined to one surface of a anion exchange membrane and a cathode is joined to the other surface, and air is supplied to the cathode, wherein air with a reduced carbon dioxide concentration in the atmosphere is supplied to the cathode by a low carbon dioxide air supply system that supplies air with the reduced carbon dioxide concentration to the cathode.
1. An operating method for an anion-exchange membrane-type fuel cell including an anion-exchange membrane-electrode assembly in which an anode is joined to one surface of an anion-exchange membrane; a cathode is joined to the other surface; air is supplied to the cathode, and at least a hydroxy-ion conducts in the anion-exchange membrane and moves into the anode, wherein:
counterion in the anion-exchange membrane at the start of operation is HCO 3 − , CO 3 2− or mixture thereof; and the air supplied to the cathode is reduced in concentration of carbon dioxide.
2. The operating method for an anion-exchange membrane-type fuel cell as set forth in claim 1 , wherein carbon dioxide concentration in said air supplied to said cathode is reduced to 300 ppm or less.
3. The operating method for an anion-exchange membrane-type fuel cell as set forth in claim 1 , further comprising supplying fuel made of a non-carbon compound to said anode.
4. The operating method for an anion-exchange membrane-type fuel cell as set forth in claim 3 , wherein said non-carbon compound is hydrogen.
5. An anion-exchange membrane-type fuel cell, comprising:
an anion-exchange membrane-electrode assembly in which an anode is joined to one surface of an anion-exchange membrane and a cathode is joined to the other surface, and
and at least a hydroxy-ion conducts in the anion-exchange membrane and moves into the anode,
wherein a counterion of said anion-exchange membrane is HCO 3 − , CO 3 2− or mixture thereof at the start of operation; and
wherein the anion-exchange membrane-type fuel cell further comprises a low carbon dioxide air supply system for taking in air and supplying air after reducing a carbon dioxide concentration to the cathode.
6. An operating method for an anion-exchange membrane-type fuel cell, comprising:
joining an anode to one surface of an anion-exchange membrane of an anion-exchange membrane-electrode assembly;
joining a cathode to the other surface of the anion-exchange membrane; and
supplying air to the cathode, and
conducting at least a hydroxy-ion in the anion-exchange membrane to move into the anode,
wherein a counterion in the anion-exchange membrane at the start of operation is HCO 3 − , CO 3 2− or mixture thereof, and
wherein a concentration of carbon dioxide in the air supplied to the cathode is reduced.
7. The operating method as set forth in claim 6 , wherein a concentration of carbon dioxide in the air supplied to the cathode is reduced to 250 ppm or less.
8. The operating method as set forth in claim 6 , wherein a concentration of carbon dioxide in the air supplied to the cathode is reduced to 100 ppm or less.
9. The operating method as set forth in claim 6 , wherein a concentration of carbon dioxide in the air supplied to the cathode is reduced to 10 ppm or less.
10. The operating method as set forth in claim 6 , wherein a concentration of carbon dioxide in the air supplied to the cathode is reduced to 5 to 100 ppm.