Electrolyte for iron-air batteries and iron-air battery
An electrolyte for iron-air batteries, which is able to increase the discharge capacity of iron-air batteries without concentration control, and an iron-air battery using the electrolyte. The electrolyte for iron-air batteries having an anode containing an iron element may comprise an aqueous solution comprising a discharge reaction promoter containing at least one kind of anion selected from the group consisting of SCN − anions, S 2 O 3 2− anions and (CH 3 ) 2 NCSS − anions.
1. An electrolyte for iron-air batteries having an anode containing an iron element, the electrolyte comprising:
an aqueous solution comprising at least one kind of discharge reaction promoter selected from the group consisting of NaSCN, Na 2 S 2 O 3 , and (CH 3 ) 2 NCSSNa,
wherein a concentration of the discharge reaction promoter is in a range of 0.005 mol/L to 0.1 mol/L.
2. The electrolyte for iron-air batteries according to claim 1 , wherein the discharge reaction promoter is Na 2 S 2 O 3 .
3. The electrolyte for iron-air batteries according to claim 1 , wherein the aqueous solution is basic.
4. The electrolyte for iron-air batteries according to claim 1 , wherein the aqueous solution comprises KOH as an electrolyte compound.
5. An iron-air battery comprising:
an air electrode configured to receive an oxygen supply;
an anode containing an iron element; and
an electrolyte in contact with the air electrode and the anode, the electrolyte comprising:
an aqueous solution comprising at least one kind of discharge reaction promoter selected from the group consisting of NaSCN, Na 2 S 2 O 3 , and (CH 3 ) 2 NCSSNa,
wherein a concentration of the discharge reaction promoter is in a range of 0.005 mol/L to 0.1 mol/L.
6. The electrolyte for ion-air batteries according to claim 1 , wherein the discharge reaction promoter is (CH 3 ) 2 NCSSNa.
7. The iron-air battery according to claim 5 , wherein the discharge reaction promoter is Na 2 S 2 O 3 .
8. The iron-air battery according to claim 5 , wherein the aqueous solution is basic.
9. The iron-air battery according to claim 5 , wherein the aqueous solution comprises KOH as an electrolyte compound.
10. The iron-air battery according to claim 5 , wherein the discharge reaction promoter is (CH 3 ) 2 NCSSNa.