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A kind of activated carbon material and preparation method for cathodic reaction

A cathode reaction and activated carbon technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of poor performance of activated carbon-based catalysts, complicated preparation methods, and inability to be widely used in practice

Inactive Publication Date: 2017-06-06
INST OF NEW ENERGY SHENZHEN
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  • Application Information

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Problems solved by technology

[0005] One of the purposes of the present invention is to provide a defective activated carbon material for cathodic reactions, as a catalyst for fuel cells and metal-air battery cathodic reactions, to replace the current expensive platinum-based catalysts and doped graphene or doped graphene with complicated preparation methods Carbon nanotubes, etc., solve the technical problem that the performance of activated carbon-based catalysts in the prior art is not good and cannot be widely used in practice

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  • A kind of activated carbon material and preparation method for cathodic reaction
  • A kind of activated carbon material and preparation method for cathodic reaction
  • A kind of activated carbon material and preparation method for cathodic reaction

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preparation example Construction

[0031] In addition, the embodiment of the present invention also provides a method for preparing an activated carbon material used for the cathode reaction of fuel cells and metal-air batteries, which mainly includes the following steps:

[0032]S01, activated carbon is activated to obtain a product one;

[0033] S02. The product one is placed in an ammonia atmosphere, and calcined at a temperature of 400-900° C. for 1-5 hours to perform nitrogen doping treatment to obtain product two;

[0034] S03. The product 2 is placed in an inert gas atmosphere, and calcined at a temperature of 850-1150° C. for 1-5 hours for denitrification treatment to obtain a defective activated carbon material.

[0035] Specifically, the above S01 step can be completed by using the existing activated carbon activation treatment method. Preferably, the activated carbon and the activator can be mixed in a mass ratio of 1:3-1:10, and then the mixture is placed in an inert gas atmosphere at 500-900 ° C. ...

Embodiment 1

[0040] (1) Activated carbon and potassium hydroxide were physically mixed in an alumina porcelain boat at a mass ratio of 1:7.5, and then placed in a tube furnace. First purging with nitrogen for 30 minutes, and then run the temperature rise program: from room temperature to 750°C at a rate of 5°C / min, then keep the temperature at 750°C for 60 minutes under a nitrogen atmosphere, end the program, and cool down with the furnace;

[0041] (2) Dissolve the sample obtained in step (1) with deionized water first, then add an excess of 3mol / L hydrochloric acid to wash, and finally use deionized water to filter and wash the solution to neutrality, then dry it at 80°C Dry in the box for 12 hours;

[0042] (3) Treat the activated carbon obtained in step (2) under an ammonia atmosphere at 500°C for 3h (the heating rate is 3°C / min) to obtain a nitrogen-doped sample;

[0043] (4) The activated carbon obtained in step (3) was further calcined for 2 h at 950 °C under a nitrogen atmosphere ...

Embodiment 2

[0045] (1) Activated carbon and potassium hydroxide were physically mixed in an alumina porcelain boat at a mass ratio of 1:7.5, and then placed in a tube furnace. First purging with nitrogen for 30 minutes, and then run the temperature rise program: from room temperature to 750°C at a rate of 5°C / min, then keep the temperature at 750°C for 60 minutes under a nitrogen atmosphere, end the program, and cool down with the furnace;

[0046] (2) Dissolve the sample obtained in step (1) with deionized water first, then add an excess of 3mol / L hydrochloric acid to wash, and finally use deionized water to filter and wash the solution to neutrality, then dry it at 80°C Dry in the box for 12 hours;

[0047] (3) Treat the activated carbon obtained in step (2) under an ammonia atmosphere at 500°C for 3h (the heating rate is 3°C / min) to obtain a nitrogen-doped sample;

[0048] (4) The activated carbon obtained in step (3) was further calcined for 2 h at 1050° C. under a nitrogen atmospher...

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Abstract

The invention discloses an activated carbon material for a cathode reaction. The activated carbon material is formed by the following steps: with activated carbon as a basic material, carrying out an activating treatment and a nitrogen-doping treatment on the activated carbon; and burning the activated material at 850-1150 DEG C for 1-5 hours, and then carrying out a nitrogen removal treatment. The activated carbon material has good electrocatalytic properties. Meanwhile, the invention further discloses a preparation method of the activated carbon material for the cathode reaction. The method mainly comprises an activating treatment step, a nitrogen-doping treatment step and a nitrogen removal treatment step on the activated carbon. The preparation method is simple, easy to control and implement, and suitable for industrial application.

Description

technical field [0001] The invention relates to a catalyst for cathode reaction, in particular to an active carbon material and a preparation method for fuel cell and metal-air battery cathode reaction. Background technique [0002] In fuel cells and metal-air batteries, the cathode oxygen reduction reaction (ORR) is the rate-limiting link of the entire reaction, which determines the overall performance of fuel cells and metal-air batteries. Currently, platinum (Pt) and its alloys are the most common electrocatalysts for ORR due to their good catalytic activity. However, Pt resources are scarce and expensive, and in direct methanol fuel cells, Pt will be poisoned by methanol and lose its catalytic activity. These drawbacks have greatly hindered the large-scale application of fuel cells and metal-air batteries. Therefore, the development of materials that can replace platinum-based catalysts is a key issue to enable large-scale commercial applications of fuel cells and metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/88H01M4/9091Y02E60/50
Inventor 姚向东严学成
Owner INST OF NEW ENERGY SHENZHEN
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