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Preparation methods of porous carbon nanofiber felt and porous carbon nanofiber electrode

A nanofiber, porous carbon technology, applied in the manufacture of hybrid/electric double layer capacitors, heating/cooling fabrics, non-woven fabrics, etc., can solve the problems of energy consumption and reagent raw materials, increased production costs, pollution, etc. Effects of chemical properties and desalination, simplified operation and cost reduction

Inactive Publication Date: 2015-02-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activation requires additional equipment, consumes more energy and reagent raw materials, and greatly increases production costs; waste reagents will also cause pollution

Method used

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  • Preparation methods of porous carbon nanofiber felt and porous carbon nanofiber electrode
  • Preparation methods of porous carbon nanofiber felt and porous carbon nanofiber electrode
  • Preparation methods of porous carbon nanofiber felt and porous carbon nanofiber electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 0.9371g polyacrylonitrile (PAN; M w =150000), add in 10mL dimethylformamide (DMF); add 1.4056g dimethyl sulfone (DMSO2), 60 ℃ of constant temperature water baths are heated until completely dissolving, be mixed with PAN concentration and be 9%, PAN and DMSO Mass ratio is 2:3 spinning precursor solution. The precursor solution placed in a 10mL needle tube was pushed into a 12kV electrostatic field through a needle with a diameter of 0.5mm at a constant rate of 1mL / min by a quantitative pump for electrospinning. The distance between the receiving plate and the needle was 15cm, and the ambient temperature was 20.5°C. The relative humidity is 35%. The nanofiber mat obtained by electrospinning was placed in a muffle furnace, and the temperature was raised from room temperature to 80 °C at a rate of 1 °C / min in an air atmosphere, stayed for 1 h, and then raised to 260 °C at a rate of 1 °C / min. ℃ and stay for 1h to complete the pre-oxidation pore-forming process, figu...

Embodiment 2

[0035] Embodiment two (control test)

[0036] Weigh 0.9371g polyacrylonitrile (PAN; M w =150000), add 10mL of dimethylformamide (DMF) in a 60°C constant temperature water bath and heat until completely dissolved to prepare a spinning precursor solution with a PAN concentration of 9%. Use a quantitative pump to push the precursor solution in a 10mL needle tube into a 12kV electrostatic field through a needle with a diameter of 0.5mm at a constant rate of 1mL / min. The distance between the receiving plate and the needle is 15cm, the ambient temperature is 28°C, and the relative humidity is 35 %. The nanofiber mat obtained by electrospinning was placed in a muffle furnace, and the temperature was raised from room temperature to 80 °C at a rate of 1 °C / min in an air atmosphere, stayed for 1 h, and then raised to 260 °C at a rate of 1 °C / min. ℃ and stay for 1h to complete the pre-oxidation process. Under a nitrogen atmosphere, place the pre-oxidized nanofiber mat in a tube furnac...

Embodiment 3

[0038] Weigh 0.9371g polyacrylonitrile (PAN; M w =150000), add in 10mL dimethylformamide (DMF); add 0.6264g dimethyl sulfone, heat in a constant temperature water bath at 60°C until completely dissolved, and prepare the PAN concentration as 9%, and the mass ratio of PAN to DMSO2 is 3:2 spinning precursors. The precursor solution placed in a 10mL needle tube was pushed into a 12kV electrostatic field through a needle with a diameter of 0.5mm at a constant rate of 1mL / min by a quantitative pump for electrospinning. The distance between the receiving plate and the needle was 15cm, and the ambient temperature was 29°C. The relative humidity is 32%. The nanofiber mat obtained by electrospinning was placed in a muffle furnace, and the temperature was raised from room temperature to 80 °C at a rate of 1 °C / min in an air atmosphere, stayed for 1 h, and then raised to 260 °C at a rate of 1 °C / min. °C and stay for 1h to complete the pre-oxidation pore-forming process. Under a nitroge...

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Abstract

The invention provides preparation methods of porous carbon nanofiber felt and a porous carbon nanofiber electrode. The preparation method of the porous carbon nanofiber felt is characterized by comprising the following steps of 1, dissolving a high molecular polymer and a pore former in an organic solvent to form a polymer solution, 2, spinning the polymer solution into nanofiber felt by an electrostatic spinning technology, and 3, allowing the nanofiber felt in Step 2 to complete a preoxidation process in an air atmosphere and then performing high-temperature carbonization on the nanofiber felt under inert gas shielding to form the porous carbon nanofiber felt. The preparation method of the porous carbon nanofiber electrode comprises the following steps of preparing the porous carbon nanofiber felt in accordance with the method, and then directly attaching the porous carbon nanofiber felt on a current collector to form the electrode. According to the methods, cheap and recycling dimethyl sulfone is selected as the pore former, so that the cost is effectively lowered.

Description

technical field [0001] The invention relates to a preparation method of a porous carbon nanofiber felt and a porous carbon nanofiber electrode, and is applied in the technical fields of supercapacitors and capacitive deionization. Background technique [0002] Carbon materials have the advantages of good chemical stability, high specific capacitance, moderate price, long cycle life, and abundant sources, so they have attracted attention from various fields, especially in the preparation of electrode materials. At present, the commonly used carbon materials for preparing electrodes include activated carbon powder, carbon aerogel, activated carbon fiber, and carbon nanotubes. However, most of them limit their application due to obvious defects. For example, although activated carbon powder has a large specific surface area, the conductivity is significantly reduced due to the use of binders; although the pore size of carbon aerogels is controllable, its mechanical However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D06C7/04H01G11/86
CPCY02E60/13D04H1/728D06C7/04H01G11/86
Inventor 刘建允潘浩杰蔡文姝熊祝标王世平张伟
Owner DONGHUA UNIV
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