Nitrogen-phosphorus co-doped carbon fiber loaded CoP composite material, preparation method and application thereof, and aluminum air battery

A composite material and co-doping technology, which is applied in the field of aluminum-air batteries, can solve the problem of unsatisfactory conductivity of transition metal phosphide catalysts

Pending Publication Date: 2022-05-13
易航时代(北京)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Nitrogen-phosphorus co-doped carbon fiber loaded CoP composite material, preparation method and application thereof, and aluminum air battery
  • Nitrogen-phosphorus co-doped carbon fiber loaded CoP composite material, preparation method and application thereof, and aluminum air battery

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preparation example Construction

[0028] The present invention also provides a method for preparing a nitrogen-phosphorous co-doped carbon fiber-loaded CoP composite material described in the above technical solution, comprising the following steps:

[0029] Provide ZIF-8 organic solution and polyacrylonitrile organic solution;

[0030] mixing ZIF-8 organic solution, cobalt phosphate and polyacrylonitrile organic solution to obtain spinning precursor;

[0031] Electrospinning the spinning precursor solution to obtain polyacrylonitrile nanofiber loaded ZIF-8 film;

[0032] The polyacrylonitrile nanofiber loaded ZIF-8 film is pre-oxidized to obtain a pre-oxidized product;

[0033] The preoxidized product was placed in N 2 Pyrolysis is carried out in a protective atmosphere to obtain the nitrogen-phosphorus co-doped carbon fiber-loaded CoP composite material.

[0034] In the present invention, unless otherwise specified, each component in the technical solution is a commercially available product well known to...

Embodiment 1

[0088] 2.5mmol of Zn(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 dry overnight , to obtain ZIF-8 particles with a particle size of ≤1 μm;

[0089] The ZIF-8 particles prepared by 1.9g were washed with methanol and washed with DMF successively, then added 1mL of DMF and stirred evenly to obtain ZIF-8 organic solution; weighing 0.8g mass percentage concentration was 98% reagent pure cobalt phosphate (Co 3 (PO 4 ) 2 ·8H 2 O; 0.5g of PAN (M w =130000~150000) into 4mL of DMF, control the mass ratio of ZIF-8 particles, cobalt phosphate, and PAN to 1.9:0.8:1, and stir at 60°C for 6h, then mix and stir the above three solutions evenly to form spinning Precursor. Inhale the precursor liquid into the needle tube for electrospinning. The specific parameters ...

Embodiment 2

[0127] According to the method of embodiment 1, obtain the ZIF-8 particle of particle diameter≤1 μ m;

[0128] Wash 2.1g of prepared ZIF-8 particles with methanol and DMF successively, then add 1mL of DMF and stir evenly to obtain ZIF-8 organic solution; weigh 1.2g mass percent concentration of 98% reagent pure cobalt phosphate; PAN(M w =130000~150000) into 4mL of DMF, control the mass ratio of ZIF-8 particles, cobalt phosphate, and PAN to 1.1:1.2:1.3, and stir at 60°C for 6h, then mix and stir the above three solutions evenly to form spinning Precursor. Inhale the precursor solution into the needle tube for electrospinning. The specific parameters of the electrospinning are: the voltage is 20kV, the distance between the needle and the receiving plate is 20cm, the advancing speed is 20μL / min, the temperature is 30°C, and the humidity is 40%. Polyacrylonitrile nanofiber loaded ZIF-8 film;

[0129] After the electrospinning is completed, the polyacrylonitrile nanofiber-loaded...

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a nitrogen-phosphorus co-doped carbon fiber loaded CoP composite material, a preparation method and application thereof, and an aluminum air battery. The invention provides a nitrogen and phosphorus co-doped carbon fiber loaded CoP composite material, which comprises nitrogen and phosphorus co-doped carbon fibers, nitrogen and phosphorus co-doped ZIF-8 derived spherical carbon and CoP particles, the nitrogen and phosphorus co-doped ZIF-8 derived spherical carbon coats the CoP particles, and the nitrogen and phosphorus co-doped carbon fibers are loaded on the surface of the nitrogen and phosphorus co-doped ZIF-8 derived spherical carbon. According to the invention, N atoms on ZIF-8 have Lewis alkalinity, and the pore structure is beneficial to adsorption of acidic carbon dioxide, has a good barrier effect on carbon dioxide, and can permeate oxygen at the same time. The nitrogen and phosphorus co-doped modified ZIF-8 derived spherical carbon and the carbon fiber form a carbon-based framework, so that the oxygen reduction reaction activity of the catalyst is improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a nitrogen-phosphorus co-doped carbon fiber-loaded CoP composite material, a preparation method and application thereof, and an aluminum-air battery. Background technique [0002] The aluminum-air battery is an energy storage device with high-purity aluminum Al (containing 99.99% aluminum) as the negative electrode, oxygen as the positive electrode, and potassium hydroxide (KOH) or sodium hydroxide (NaOH) aqueous solution as the electrolyte; the reaction mechanism is: aluminum uptake Oxygen in the air produces a chemical reaction when the battery is discharged, and aluminum and oxygen are converted into aluminum oxide. Aluminum-air batteries, due to their low cost, theoretical energy density (2.98Ah / g) equivalent to lithium (3.86Ah / g), are less environmentally polluting and can be recycled. The catalytic activity of air cathode catalysts is an important factor that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M12/06D01D5/00D04H1/4382D04H1/728D06C7/04
CPCH01M4/9083H01M4/90H01M4/88H01M12/06D04H1/728D01D5/0015D04H1/43838D06C7/04
Inventor 卢小溪刘建学卢惠民
Owner 易航时代(北京)科技有限公司
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