Titles:
Air electrode and metal-air battery
空気極および金属空気電池
Abstracts:
PROBLEM TO BE SOLVED: To provide an air electrode capable of obtaining good battery characteristics. A metal-air battery 1 includes an air electrode 10 having a current collector 13, a catalyst layer 12, and a water-repellent film 11. When the contact angle of the catalyst layer 12 with water 1 second after the drip is a and the contact angle of the catalyst layer 12 with water 60 seconds after the drip is b, the contact angle of the catalyst layer 12 is a ≦. 135 ° and a−b ≧ 10 ° [Selection diagram] FIG. 1
PROBLEM TO BE SOLVED: To provide a liquid detection device capable of controlling the introduction of a liquid into a metal-air battery, operating the metal-air battery appropriately, and improving the detection accuracy. A liquid detection device 1 has a positive electrode sheet and a negative electrode sheet, and a metal-air battery 2 and a metal-air battery 2 that generate power by permeating a liquid between the positive electrode sheet and the negative electrode sheet. A housing 10 for accommodating the housing 10 is provided, and the housing 10 is provided with a liquid introduction means (liquid introduction hole 13) for introducing the liquid into the metal-air battery 2 from the outside. [Selection diagram] Fig. 2
