Views: 0 Author: Site Editor Publish Time: 2023-03-11 Origin: Site
The invention of the zinc air battery has a history of more than 100 years, and it was first applied to power sources such as railway signal lights. Compared with traditional batteries, the biggest feature of zinc-air batteries is green environmental protection.
What is the basic principle of zinc-air battery?
What are the classifications of zinc-air batteries?
What is the application prospect of zinc air battery?
As we all know, a zinc-air battery is a battery that uses oxygen in the air as the anode fuel and metallic zinc as the anode fuel. For conventional batteries, the battery energy depends on the content of active materials stored at the two electrodes. Since the positive electrode directly uses oxygen in the air as the active material, the energy of the zinc-air battery is mainly determined by the anode metal zinc plate, which is similar to the fuel electrode of the fuel cell. Therefore, the zinc-air battery is often called a half-fuel cell.
(1) Primary battery (dry battery)
A battery that cannot be used again after the first complete discharge is called a primary battery. Such batteries tend to have lower discharge currents, but are inexpensive, have a long shelf life, and have a high energy density.
(2) Rechargeable zinc-air battery
After the battery is used, it can be used again by charging, which is called a rechargeable zinc-air battery. During the charging process, the slowly generated oxygen diffuses into the atmosphere through the air electrode; the zinc oxide generated during the discharge process is also slowly re-reduced to zinc raw material and returned to the negative electrode.
(3) Mechanical rechargeable battery
"Mechanical rechargeable batteries" are often referred to as "replaceable electrode batteries" in some literature. When the battery is fully discharged, the oxidized metal electrode is discarded and can be replaced with a new metal electrode. At the same time, fresh electrolyte can also be replenished, but the air electrode of the main component will not be used up, and the air electrode will remain and can be used for a long time.
If the zinc air battery can be widely used, air and noise pollution can be greatly reduced. Therefore, when the commercialization of zinc air battery is expensive, huge investment and insurmountable technical bottlenecks, the birth of zinc air battery may provide a shortcut for the popularization of environmentally friendly vehicles. Electric bicycles powered by zinc air battery have taken to the streets of Shanghai. The biggest feature of this zinc-air fuel cell vehicle is its long driving range, which can reach more than 200 km; another unique feature is that it uses battery replacement instead of In the traditional way of charging electric vehicles, it takes about 3 minutes for each battery replacement.
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