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Preparation method of bifunctional catalysis carbon material used for zinc air battery

A technology of zinc-air battery and functional catalytic carbon, which is applied in the direction of hybrid battery, battery electrode, fuel cell half-cell and secondary battery-type half-cell, etc., which can solve the difficult to meet application requirements and realize simultaneous catalysis and other issues, to achieve the effects of easy implementation, ensuring dual-functional catalytic activity, and reducing industrialization costs

Active Publication Date: 2018-04-03
苏州德加能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, the catalytic activity of carbon materials still has great limitations. Most carbon materials only play a catalytic role in the oxygen reduction reaction, and it is difficult to catalyze the simultaneous oxygen reduction reaction and oxygen evolution reaction, making it difficult to meet Requirements for applications in zinc-air batteries

Method used

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  • Preparation method of bifunctional catalysis carbon material used for zinc air battery
  • Preparation method of bifunctional catalysis carbon material used for zinc air battery
  • Preparation method of bifunctional catalysis carbon material used for zinc air battery

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preparation example Construction

[0019] The preparation method of bifunctional catalytic carbon material for zinc-air battery of the present invention is characterized in that it comprises the following steps: (a) making pyrrole monomer in deionized water in FeCl 2 and H 2 o 2 Under the action of reacting to form a complex, followed by drying to obtain a brown product; (b) dissolving the brown product in deionized water, adding NaCl and then freeze-drying; (c) placing the freeze-dried product in step (b) In a tube furnace, annealing is carried out under the protection of an inert gas; washed successively with deionized water and alcohol, and vacuum-dried; (d) taking the product of step (c) and placing it in hydrochloric acid for stirring, centrifuging, and finally using deionized Washing with water and alcohol in sequence, and then vacuum drying to obtain oxygen and nitrogen co-doped carbon nanosheets; the pyrrole monomer, FeCl 2 、H 2 o 2 The ratio with NaCl is 1-3ml: 0.3-0.7g: 15-35ml: 5-10g. A specific...

Embodiment 1

[0023] This embodiment provides a method for preparing a bifunctional catalytic carbon material for a zinc-air battery, which comprises the following steps:

[0024] (a) Take 100ml of deionized water, add 2ml of pyrrole monomer to it, and ultrasonically treat it for 30 minutes to make it uniformly dispersed to form a suspension; add 0.4g of FeCl to the uniformly dispersed suspension of pyrrole 2 , drop 30ml H 2 o 2 , fully stirred and continued to react for 24 hours to form a complex, and after drying, a brown product was obtained;

[0025] (b) Disperse the brown product obtained above in deionized water, add 8g NaCl, stir for more than 12 hours, and then lyophilize;

[0026] (c) placing the freeze-dried product in a tube furnace, annealing at 1000° C. for 2 hours under the protection of Ar gas, and the gas flow rate is 200 sccm; fully washing the annealed material successively with a large amount of deionized water and alcohol, vacuum drying;

[0027] (d) Take the dried m...

Embodiment 2

[0030] This embodiment provides a method for preparing a bifunctional catalytic carbon material for a zinc-air battery, which comprises the following steps:

[0031] (a) Take 100ml of deionized water, add 3ml of pyrrole monomer to it, and ultrasonically treat it for 30 minutes to make it uniformly dispersed; add 0.5g of FeCl to the uniformly dispersed suspension of pyrrole 2 , slowly drop into 35ml H 2 o 2 , fully stirred and continued to react for 24 hours to form a complex; dry after drying to obtain a brown product;

[0032] (b) Disperse the brown product obtained above in deionized water, add 10g NaCl, stir for more than 12 hours, and then freeze-dry;

[0033](c) Place the lyophilized product in a tube furnace, anneal at 600°C for 2 hours under the protection of Ar gas, and the gas flow rate is 200 sccm; wash the annealed material with deionized water and alcohol in sequence, and dry it in vacuum ;

[0034] (d) Take an appropriate amount of dried material and place it ...

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Abstract

The invention relates to a preparation method of an oxygen-nitrogen co-doped carbon material used for a zinc air battery. The preparation method comprises the following steps of (a), enabling a pyrrole monomer in deionized water to be reacted under the effects of FeCl<2> and H<2>O<2>, and then performing drying to obtain a brown product; (b), enabling the brown product to be dispersed into deionized water, and adding NaCl and then performing freeze-drying; (c), putting the freeze-dried product in the step (b) into a tubular furnace, and performing annealing treatment under inert gas protection; and performing washing by deionized water and alcohol in sequence and carrying out vacuum drying; and (d), putting the product in the step (c) into hydrochloric acid to be stirred, and performing washing by deionized water and alcohol in sequence, and then and carrying out vacuum drying to obtain an oxygen-nitrogen co-doped carbon nanosheet, wherein the ratio of the pyrrole monomer to FeCl<2> toH<2>O<2> to NaCl is (1-3ml) to (0.3-0.7g) to (15-35ml) to (5-10g). The zinc air battery which takes the material as the air positive electrode has excellent performance.

Description

technical field [0001] The invention belongs to the field of zinc-air batteries, and relates to a catalytic carbon material, in particular to a preparation method of a bifunctional catalytic carbon material for zinc-air batteries. Background technique [0002] Zinc-air batteries are considered to be the most promising secondary energy storage devices due to their extremely high theoretical energy density, low cost, and environmental friendliness. In the zinc-air battery system, the positive electrode catalyst is one of the key components of the battery, and its catalytic activity is directly related to the performance of the zinc-air battery. An ideal zinc-air battery catalyst should have the following characteristics: (1) large specific surface area; (2) a large number of exposed active sites; (3) good electrical conductivity, high conductivity; (4) high Excellent chemical stability and persistence, strong adaptability to alkali environment; (5) low cost, wide source, conv...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M4/96H01M12/08
CPCH01M4/88H01M4/90H01M4/96H01M12/085Y02E60/10
Inventor 晏成林王梦凡刘思鸶钱涛
Owner 苏州德加能源科技有限公司
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