Zinc-manganese battery: Zinc is used as the negative electrode active material and also serves as the battery container and negative electrode current collector. It is the main material that determines the storage performance of the battery. A small amount of cadmium and lead are contained in zinc flakes. Cadmium can enhance the strength of zinc, and lead can improve the ductility of zinc. Both cadmium and lead can increase the overpotential of hydrogen on the zinc electrode, reduce the self-discharge of the zinc electrode, and slow down the corrosion of zinc flakes and the release of hydrogen. If the zinc flakes contain Cu, Fe, Ni, etc., it will reduce the overpotential of H2 precipitated on the zinc electrode and accelerate the self-discharge of the battery during storage. Therefore, these harmful impurities must be strictly controlled.
Zinc-air battery: Zinc-air battery, also known as zinc-oxygen battery, is a type of metal-air battery. The theoretical value of specific energy of zinc-air battery is 1350W·h/kg. The specific energy of the latest battery has reached 230Wh/kg, which is almost 8 times that of lead-acid batteries. It can be seen that the development space of zinc-air batteries is very large. Zinc-air batteries generally adopt the method of replacing zinc electrodes for "mechanical charging". The time to replace the electrode can be completed in a few minutes. Replace with a new zinc electrode, "charging" time is very short, very convenient. If this kind of battery has been developed, the construction of social security facilities such as charging stations has been eliminated. Zinc electrodes can be purchased in supermarkets, battery shops, auto parts stores, etc., which is very beneficial to the popularization of battery electric vehicles. This kind of battery has small size, large charge capacity, small mass, can work normally in a wide temperature range, and has no corrosion, and the work is safe and reliable. However, the zinc electrode consumes more energy in the electrolytic reduction process. It needs 2500 kWh of electricity to reduce to zinc per ton of zinc oxide, so the cost is higher when used in electric vehicles. The charge capacity of the test battery is only 5 times that of the lead-acid battery, which is not ideal. But 5 times the charge of lead-acid batteries has attracted the attention of the world. The United States, Mexico, Singapore and some European countries have been tested on postal vehicles, buses, and motorcycles. It is also a very promising electric vehicle. battery.
In addition, zinc has good resistance to electromagnetic fields. The conductivity of zinc is 29% of that of standard electrical copper. Zinc plate is a very effective shielding material. At the same time, because zinc is non-magnetic, it is suitable for the material of instrument parts, instrument housings and coins. At the same time, zinc itself and Sparks will not occur when colliding with other metals, so it is suitable for underground explosion-proof equipment. It is widely used in rubber, paint, enamel, medicine, printing, fiber and other industries. Zinc has suitable chemical properties. Zinc can interact with NH4CI to release H+ positive ions. Zinc-manganese dioxide battery takes advantage of this feature of zinc, and uses zinc alloy as the battery shell, which is not only a container for battery electrolyte, but also participates in battery reaction to form the battery's anode. Its performance is also widely used in the pharmaceutical industry. Zinc can react with acids or strong bases to release hydrogen. Zinc fertilizer (zinc sulfate, zinc chloride) can promote plant cell respiration and carbohydrate metabolism. Zinc powder, lithopone, zinc chrome yellow can be used as pigments. Zinc oxide can also be used in medicine, rubber, paint and other industries.