| 摘要 |
PROBLEM TO BE SOLVED: To provide a zinc air battery which is dischargeable with a current of no less than 15mA/cm<2> per unit electrode area and whose deterioration in the electric capacity after 30 days at 25 deg.C and 60% RH is below 10%. SOLUTION: This zinc air battery contains zinc 11 as negative electrode active material and uses oxygen in the air as positive electrode active material, and the positive electrode is provided with an air electrode for oxygen reduction, wherein the max. discharge current per unit area of air electrode 4 is no less than 15mA/cm<2> . A fine porous film 7 having chiefly small holes of diameters under 596Åis used to a gas dispersion layer 5 arranged on the gas dispersion surface of the air electrode 4, and thus the zinc air battery of button form is constituted. |
