| 摘要 |
PROBLEM TO BE SOLVED: To improve a reliability of a button-shaped air-zinc battery accommodating the trend to have a high capacity. SOLUTION: In the button-shaped air-zinc battery, an air diffusion layer: a water repellent layer, a positive catalytic layer, and a separator are laminated successively; a negative receptacle filled with a gel-zinc negative electrode is placed through the separator; and an opening of the positive can is bended inward through an insulating gasket and sealed. By reducing the diameter of the sidewall of the positive can portion where the positive catalytic layer has been arranged, a contact between an inner wall of the positive can and the positive catalytic layer is stabilized, and a sporadic increase of an internal resistance is prevented. As the result, a reliability of the battery can be improved, and a stable discharge characteristic can be obtained. The part to reduce the diameter can be (A), which is from the bottom of the positive can to the portion where the separator is placed, and the extent (D-C) to which the diameter is reduced is, for example, from 0.005 to 0.2 mm. |
