The zinc-air battery is a novel chemical power source that uses oxygen from the air as the positive electrode and metallic zinc as the negative electrode. It is a hybrid of a rechargeable battery and a fuel cell. While scientists invented the zinc-air battery over a century ago, its limitations have hindered its development. The specific advantages and disadvantages of the zinc-air battery are outlined below:
I. Advantages of Zinc-Air Batteries
1. Environmentally friendly: The biggest feature of zinc-air batteries is their green and environmentally friendly nature. During operation, the batteries do not produce any harmful substances that pollute the atmosphere.
2. High energy density: Zinc-air batteries can generate 0.3 kWh of electricity per kilogram. For the same battery weight, zinc-air batteries provide significantly more electricity than other types of batteries.
3. Low cost: Zinc-air batteries have abundant reserves of zinc materials, and the technology for zinc-air batteries has been around for over a hundred years and is not difficult to manufacture, so their manufacturing cost is very low.
II. Disadvantages of zinc-air batteries:
1. High self-discharge rate: Zinc electrodes are unstable in alkaline solutions. After zinc dissolves, it self-discharges and releases hydrogen gas, which can consume the stored charge in a short time.
2. Cannot be recharged: This is the most fatal flaw of zinc-air batteries. These batteries are disposable and cannot be recharged for repeated use.
3. Electrolyte leakage is easy: The surface of zinc-air batteries has many tiny pores, which can easily lead to leakage after prolonged use. In addition, the electrolyte inside the battery is highly corrosive, and the consequences of leakage would be unimaginable.
As can be seen from the above, zinc-air batteries have some fatal drawbacks, so they cannot completely replace lithium batteries yet. However, as a more environmentally friendly battery, its development prospects are still good. It is hoped that scientists can overcome the shortcomings of zinc-air batteries as soon as possible and apply them to more fields.
Based on the advantages and disadvantages of zinc batteries, they are mainly used in the field of disposable batteries, while lithium batteries, with their advantages of long cycle life, good safety and low self-discharge rate, are widely used in electric mobility tools, consumer electronics and energy storage.
