Zinc air battery is a new type of chemical power supply, which uses oxygen in the air as the positive active material and metal zinc as the negative active material. Zinc air battery is a semi battery and semi fuel cell. Scientists have invented zinc air battery more than 100 years ago, but its disadvantages restrict its development. The following are the specific advantages and disadvantages of zinc air battery:

　　1. Friendly to the environment: The biggest feature of zinc air battery is green and environmental protection. During the working process, the battery will not produce any harmful substances that pollute the atmosphere;

　　2. High energy density: the power output per kilogram of zinc air battery can reach 0.3Kwh. With the same battery weight, zinc air battery can provide much more power than other types of batteries;

　　3. Low cost: the zinc material reserve required by zinc air battery is very rich. In addition, the zinc air battery technology has been available for more than 100 years, and the manufacturing difficulty is not high, so its manufacturing cost is very low.

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