Zinc/air (oxygen) battery zinc/air The positive electrode active material is oxygen in the air, the negative electrode active material is active metal zinc, and the electrolyte is an alkaline battery containing a saturated potassium hydroxide aqueous solution of zinc oxide. The electrochemical reaction during discharge is as follows: the positive electrode of the battery was initially a porous carbon with catalytic activity, which can adsorb oxygen from the air, and the discharge current density was only about 0.3rnlllcm. The oxygen expansion of fuel cells began in the 1960s The dispersed electrode structure has obtained high-performance air (oxygen) electrodes, which have achieved breakthrough improvements in electrical performance. The specific energy can reach 1, -3Sf1W} h.} kg, and the working temperature can reach 1? T1 one * 4U ` r:. Low cost, pollution-free, and endless availability of iE highly active substances. The disadvantage is that the power is small and cannot be sealed. In addition to the primary battery, there are also mechanical rechargeable batteries and reserve batteries for replacing negative metal zinc. It is often used as a power source for railway signaling equipment and navigation aids. Chopper type primary batteries are commonly used in calculators, electronic watches, and other applications