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Preparation method of high-flexibility integral carbon nanofiber membrane

A nano-carbon fiber, monolithic technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high raw material cost, poor conductivity, and poor flexibility of flexible nanocarbon fiber membranes, etc. Achieve the effects of high specific capacitance, high value-added utilization, and broad application prospects

Active Publication Date: 2021-10-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of high raw material cost, poor flexibility, poor conductivity, and value-added utilization of coke in current flexible nano-carbon fiber membrane electrode materials, the present invention provides a method for preparing flexible nano-carbon fiber membrane electrode materials using coke as a precursor

Method used

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  • Preparation method of high-flexibility integral carbon nanofiber membrane
  • Preparation method of high-flexibility integral carbon nanofiber membrane
  • Preparation method of high-flexibility integral carbon nanofiber membrane

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Experimental program
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Effect test

Embodiment 1

[0040] According to the preparation method of the highly flexible monolithic carbon nanofiber membrane of this embodiment, using delayed coking petroleum coke as a raw material, the following steps are sequentially included:

[0041] (1) Crushing the petroleum coke with a pulverizer, and screening through a 200-mesh sieve to obtain petroleum coke powder.

[0042] (2) Add 4 g of the petroleum coke powder obtained in step (1) to a mixed acid with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 3:1, and treat for 2 hours under reflux in a water bath at 80°C.

[0043] (3) The petroleum coke powder treated with the mixed acid solution obtained in step (2) is washed to neutrality, and dried to obtain oxidized petroleum coke powder.

[0044] (4) Dissolve 0.5 g of the oxidized petroleum coke powder obtained in step (3) and 1.0 g of spinning aid polyvinylpyrrolidone in 10 ml of N,N-dimethylformamide to obtain an electrospinning solution. That is, the mass ...

Embodiment 2

[0050] (1) Crushing the petroleum coke with a pulverizer, and screening through a 200-mesh sieve to obtain petroleum coke powder.

[0051] (2) Add 4 g of the petroleum coke powder obtained in step (1) to a mixed acid with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 3:1, and treat it at 80°C under reflux in a water bath for 2 hours.

[0052] (3) The petroleum coke powder treated with the mixed acid solution obtained in step (2) is washed to neutrality, and dried to obtain oxidized petroleum coke powder.

[0053] (4) Dissolve 0.8 g of the oxidized petroleum coke powder obtained in step (3) and 0.7 g of polyvinylpyrrolidone spinning aid in 10 ml of N,N-dimethylformamide to obtain an electrospinning solution. That is, the mass fraction of oxidized petroleum coke is 7.3%, the mass fraction of polyvinylpyrrolidone as a spinning aid is 6.4%, and an electrospinning precursor solution is configured.

[0054] (5), the temperature of the electrospinning ...

Embodiment 3

[0059] (1) Crushing the petroleum coke with a pulverizer, and screening through a 200-mesh sieve to obtain petroleum coke powder.

[0060] (2) Add 4 g of the petroleum coke powder obtained in step (1) to a mixed acid with a volume ratio of concentrated sulfuric acid and concentrated nitric acid of 3:1, and treat it at 80°C under reflux in a water bath for 2 hours.

[0061] (3) The petroleum coke powder treated with the mixed acid solution obtained in step (2) is washed to neutrality, and dried to obtain oxidized petroleum coke powder.

[0062] (4) Dissolve 1.0 g of the oxidized petroleum coke powder obtained in step (3) and 0.5 g of polyvinylpyrrolidone spinning aid in 10 ml of N,N-dimethylformamide to obtain an electrospinning solution. That is, the mass fraction of the oxidized petroleum coke is 9.1%, the mass fraction of the spinning aid polyvinylpyrrolidone is 4.6%, and the electrospinning precursor solution is configured.

[0063] (5), the temperature of the electrospinn...

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Abstract

The invention provides a preparation method of a high-flexibility integral carbon nanofiber membrane, which comprises the steps of performing reflux treatment on coke powder by using a mixed acid solution of concentrated sulfuric acid and concentrated nitric acid, washing and drying to obtain oxidized coke powder, and by using the oxidized coke powder as a raw material and PVB and / or PVP as a spinning aid and a pore-forming agent, preparing the high-flexibility integral carbon nanofiber membrane through electrostatic spinning, pre-oxidation and carbonization. The carbon nanofiber membrane prepared by the method has the characteristics of high flexibility, integral type, adjustable specific surface area, high conductivity and the like. According to the method, the flexible carbon nanofiber membrane is produced by taking the cheap and easily available coke as a carbon source, so that high-value utilization of the coke is realized. Compared with a method for preparing a carbon nanofiber membrane through polyacrylonitrile electrostatic spinning, the method has the advantages that raw materials are cheap and easy to obtain, the product flexibility is good, and the specific surface area is high. The high-flexibility integral carbon nanofiber membrane prepared by the method can be widely applied to the fields of electrochemical energy storage, adsorption separation, catalysis and the like.

Description

Technical field: [0001] The invention belongs to the technical field of nano-carbon materials, and in particular relates to a preparation method of a highly flexible integral nano-carbon fiber membrane. Background technique: [0002] With the development of science and technology and society, flexible electronic products, such as flexible displays, smart clothing, electronic skin, implantable medical equipment, etc., have begun to be widely used in production and life. In order to provide energy for these devices, it is necessary to develop energy storage devices that are also flexible. In order to adapt to the use scenarios of flexible electronic devices, flexible energy storage devices need to be able to ensure a continuous and stable energy supply to electronic products under extreme conditions such as mechanical deformation caused by external forces, and even dynamic deformation. At the same time, they must have high Basic properties such as safety and reliability, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/86B82Y40/00B82Y30/00
CPCH01G11/36H01G11/86B82Y40/00B82Y30/00Y02E60/13
Inventor 李文翠陈敬陆安慧
Owner DALIAN UNIV OF TECH
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