Air electrode for metal air battery and metal air battery

Abstract

The invention provides an air electrode for a metal air battery and the metal air battery. The air electrode is made of a fibrous conductive material with a porous structure, a relatively good air electrode with a relatively stable mechanical performance is provided for the metal air battery, and a chemically stable and relatively conductive supporting structure is also provided for a catalyst; metal catalyst particles are deposited in the porous structure of the air electrode, so that the oxygen reduction reaction rate of the battery can be increased. The invention provides the metal air battery. The metal air battery comprises the improved air electrode, wherein an oxygen selectivity membrane is arranged at one side of the air electrode, and oxygen is selectively filtered from air, so that the oxidization reduction reaction rate can be increased by multiple times; compared with an existing metal air battery, the metal air battery is higher in output power and longer in charging-discharging cycle life and can be used as a battery of an electric car.

Description

technical field [0001] The invention relates to the field of metal-air batteries, in particular to a metal-air battery with high power coefficient and a large number of charge-discharge cycles designed for electric vehicles and an improved air electrode in the metal-air battery. Background technique [0002] The harm caused by environmental pollution, a side effect of human beings in the process of industrialization, is being recognized by countries all over the world. Moreover, due to the excessive exploitation of primary energy, the global energy supply is becoming increasingly scarce. Since the 1990s, a series of high-performance, non-polluting new green energy sources have been studied at home and abroad, which have had a profound impact on the changes in the world's industrial structure. [0003] Metal-air battery is a new concept fuel cell formed by using metal fuel instead of hydrogen energy, and it is expected to become a new generation of green energy. It takes adv...

AI Technical Summary

Problems solved by technology

[0005] Metal-air batteries have greater energy density and lower cycle life than lithium-ion batteries; although lithium-ion batteries are the battery of choice for electric vehicles, metal-air batteries can have higher power densities than lithium-ion batteries , the energy density of metal-air batteries is 10 times that of existing lithium-ion batteries; at the same time, metal-air batteries also have the advantages of long shelf life (dry storage), low cost, and the ability to be independent of load and temperature within the operating range, but Metal-air batteries also have disadvantages such as limited charge-discharge cycle life, limited power ratio, limited power output, and limited operating temperature range, and the metal anode is easy to corrode.

These unfavorable characteristics severely limit the application of metal-air batteries

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