| 摘要 |
PURPOSE:To produce an air cell with sufficient discharge capacity by using an air electrode having a three-layered structure and specifying the total air transmittance of the air cell. CONSTITUTION:An air electrode 14 has a three-layered structure which consists of a water-repellent layer 14a, a catalyst layer 14b and a current-collecting layer 14c. During assembly of the air cell of this invention, the water-repellent layer 14a is installed facing the air diffusion layer. The total air transmittance of the air electrode 14 consisting of three layers is adjusted to 1,000-1,500,000sec/100cc.in<2>. When the above total air transmittance is less than the lower limit, an electrolyte is liable to be diluted or evaporated to dryness in the air cell 14 because the air electrode 14 transmits oxygen gas and a great amount of steam in the air although increased discharge capacity is achieved. In contrast, when the above total air transmittance exceeds the upper limit, only insufficient oxygen gas is incorporated for achieving the oxygen gas reduction point of the catalyst layer although steam is prevented from flowing into the cell and its liquid leakage resistance is improved. |
