An air battery is a type of chemical battery. Its construction principle is similar to that of a dry battery, except that its oxidant is taken from oxygen in the air. At present, there are three main types of air batteries, namely, zinc air batteries, lithium air batteries, and aluminum air batteries.
Zinc air battery
A zinc-air battery, which uses activated carbon to adsorb oxygen or pure oxygen in the air as a positive electrode active material, zinc as a negative electrode, and a primary battery using ammonium chloride or a caustic solution as an electrolyte. Also known as zinc oxide battery.
The charging process of the zinc-air battery is carried out very slowly. To solve this problem, usually the zinc plate or zinc particles of the zinc-air battery are oxidized to zinc oxide and then fail, and the zinc plate or the zinc particles and the electrolyte are generally replaced. The method is to make the zinc air battery completely updated.
Lithium air battery
The large-capacity lithium-air battery is not a new concept, and it has not been popularized so far because it has a fatal flaw.
Currently, lithium-ion batteries are ideal for next-generation plug-in hybrids and electric vehicles, but their potential is limited. Theoretically, the energy density is much greater than that of lithium-ion batteries. It greatly increases the energy density of the battery with a completely new composition. Since oxygen in the air is used as an active material on the positive electrode, the capacity density of the positive electrode is theoretically unlimited, and the capacity can be increased. In addition, if lithium metal is used as the negative electrode, the theoretical capacity will increase by one digit compared to the lithium ion rechargeable battery.
However, the reason why the lithium-air battery has not been popularized so far is that it has a fatal defect, that is, the solid reaction product lithium oxide is deposited on the positive electrode, and the contact between the electrolyte and the air is blocked, thereby causing the discharge to stop.
Aluminum air battery
Aluminum air batteries, as the name implies, are a new type of battery that uses aluminum and air as battery materials. It is a non-polluting, long-lasting, stable and reliable power supply. It is a very environmentally friendly battery. The structure of the battery and the raw materials used can be changed according to different practical environments and requirements. It has great adaptability and can be used for both land and deep sea. It can be used as a power battery and as a long-life high specific energy. The signal battery is a very powerful battery with a broad application prospect.
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