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N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as preparation method and application thereof

A catalytic material and carbon fiber technology, applied in fuel cell half-cells and primary battery half-cells, electrical components, battery electrodes, etc., can solve problems such as poor conductivity of transition metal phosphide catalysts

Pending Publication Date: 2021-06-08
济南易航新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current research on transition metal phosphides has been extensively carried out, the conductivity of transition metal phosphides as catalysts is not ideal.

Method used

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  • N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as preparation method and application thereof
  • N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as preparation method and application thereof
  • N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0046] The invention provides a kind of preparation method of N, P double-doped carbon fiber supporting CoP composite catalytic material, comprising the following steps:

[0047] Mixing ZIF-67 organic solution and polyacrylonitrile organic solution to obtain spinning precursor;

[0048] Electrospinning the spinning precursor solution to obtain a flexible film;

[0049] Pre-oxidizing the flexible film to obtain a pre-oxidation product;

[0050] After the pre-oxidized product is mixed with red phosphorus, it is pyrolyzed in a protective atmosphere to obtain the N, P double-doped carbon fiber-loaded CoP composite catalytic material.

[0051] The invention mixes ZIF-67 organic solution and polyacrylonitrile organic solution to obtain spinning precursor solution.

[0052] In the present invention, ZIF-67 particles are preferably mixed with an organic solvent to obtain a ZIF-67 organic solution.

[0053] In the present invention, the particle size of the ZIF-67 particles is prefe...

Embodiment 1

[0093] figure 1 In Example 1, the preparation flow diagram of N, P double-doped carbon fiber loaded CoP composite catalytic material, ZIF-67 nanoparticles, polyacrylonitrile and DMF are mixed, and aluminum foil is used as the substrate for electrospinning to obtain polyacrylonitrile nanofibers Load the ZIF-67 film, and then perform pre-oxidation in air (230°C, 2h) to obtain the pre-oxidized product. After the pre-oxidized product is mixed with red phosphorus for 15 minutes, it is pyrolyzed in Ar (800°C, 2h), The N, P double-doped carbon fiber supported CoP composite catalytic material was obtained.

[0094]Step 1: Preparation of CoP@G / NP-PCNFs composite

[0095] Preparation of ZIF-67 nanoparticles: 2.5mmolCo(NO 3 ) 2 ·6H 2 Dissolve O in 50 mL of methanol, 20 mmol of 2-methylimidazole in 50 mL of methanol, then mix the two, stir at room temperature for 1 h, centrifuge to separate the precipitate, wash with methanol several times, and then heat to 60 ° C in a vacuum oven and...

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Abstract

The invention provides an N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as a preparation method and application thereof, belonging to the field of aluminum air batteries. The preparation method comprises the following steps: mixing a ZIF-67 organic solution and a polyacrylonitrile organic solution to obtain a spinning precursor solution; performing electrostatic spinning on the spinning precursor solution to obtain a flexible film; pre-oxidizing the flexible film to obtain a pre-oxidized product; and mixing the pre-oxidized product with red phosphorus, and carrying out pyrolysis in a protective atmosphere to obtain the CoP@G / NP-PCNFs composite material. According to the invention, ZIF-67 particles have an atomic-level confinement dispersion effect on the Co element, and are combined with electrostatic spinning, and carbonization and phosphorization are carried out in a pyrolysis process, so the formed carbon fibers have relatively high conductivity; and the carbon spheres derived from the ZIF-67 particles wrap the CoP particles, so an ORR reaction can be promoted to conducted in a four-electron path, and battery efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum-air batteries, in particular to an N, P double-doped carbon fiber-loaded CoP composite catalytic material and a preparation method and application thereof. Background technique [0002] The demand for energy in today's society is getting higher and higher. However, the reserves of fossil energy such as coal, oil, and natural gas that humans currently rely on are limited, and the energy crisis is becoming increasingly severe. In addition, the combustion of fossil energy will produce a large amount of greenhouse gases, which will intensify the global greenhouse effect. , pollute the environment, so there is an urgent need to develop alternatives to fossil fuels. Emerging energy sources include wind energy, water energy, solar energy, and geothermal energy. Although they have the advantages of cleanliness, high efficiency, renewable energy, and low cost, they also have shortcomings such as dispersio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M4/8878H01M4/9083H01M12/06
Inventor 卢惠民刘建学卢小溪曹媛
Owner 济南易航新材料科技有限公司
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