Simple preparation method of integrated metal-air cathode for metal-air battery

Abstract

The invention discloses a simple preparation method of an integrated metal-air cathode for a metal-air battery. The simple preparation method comprises the following steps: in the preparation process of the catalyst, directly immersing the porous metal with a processed surface into the original catalyst seriflux mixed with polytetrafluoroethylene (PTFE), utilizing the surface of the porous metal with a negative charge polar group and the catalyst with a positive charge polar group to realize the bonding of the porous metal and the catalyst, and further processing by adopting a hydrothermal method. As the catalyst directly grows on the current collector, the catalyst layer of the gas-diffusion electrode has a very stable physical structure. According to the simple preparation method disclosed by the invention, the self-assembled growth between the catalyst and a support body is realized by the mutual effect between the porous metal current collector and the graphene with manganese dioxide catalyst, so as to reduce the internal resistance of the battery, and strengthen the adhesive force of the catalyst, thus improving the performance of the whole electrode and the stability of long-term discharging. The simple preparation method has good practicability, and can generate high economic benefits and social effects.

Description

technical field [0001] The invention relates to the technical field of metal-air batteries, in particular to a simple preparation method for an integrated metal-air cathode for metal-air batteries. Background technique [0002] Metal-air batteries are known as "green energy for the 21st century". This type of battery has the advantages of large capacity, high specific energy, low cost, and stable discharge. It is widely used in navigation lights, unmanned observation stations, radio relay stations, military radio transmitters, etc. It is a battery with huge market prospects. power supply. However, due to the lack of suitable air-diffusion electrode electrocatalysts, the discharge current density of metal-air batteries is relatively small, which greatly limits the application fields and industrialization pace of metal-air batteries. [0003] In a metal-air battery, the catalyst of the air electrode plays the most important role and affects the performance of the battery, es...

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Problems solved by technology

[0006] Purpose of the invention: In view of the deficiencies in the prior art, the purpose of the invention is to provide a simple preparation method for an integrated metal-air cathode for metal-air batteries, in order to effectively solve the problem of low activity of general manganese dioxide catalysts; at the same time The integrated self-assembly growth of this supported catalyst on the surface of porous metal was realized by hydrothermal and other methods

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