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Preparation method and application of flexible compact carbon nano carbon fiber membrane

A technology of nanofiber membrane and carbon fiber membrane, which is applied to the chemical characteristics of fibers, electrical components, electrochemical generators and other directions, can solve the problems of poor energy storage effect of carbon nanofiber electrode materials, etc., to solve the problem of poor energy storage effect, The effect of increasing density and broad application prospects

Inactive Publication Date: 2020-05-19
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention provides a preparation method and application of a flexible and dense carbon nano-carbon fiber membrane to solve the defect of poor energy storage effect of carbon nano-fiber electrode materials in the prior art

Method used

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  • Preparation method and application of flexible compact carbon nano carbon fiber membrane
  • Preparation method and application of flexible compact carbon nano carbon fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing a flexible and dense carbon nano-carbon fiber membrane, the specific steps are:

[0024] The first step: dissolving polyvinyl butyral and polyacrylonitrile of two different molecular weights in N,N-dimethylformamide solvent sequentially, and stirring for 30 minutes to prepare a homogeneously mixed precursor spinning solution. The mass ratio of polyvinyl butyral and polyacrylonitrile of two different molecular weights is 1:9, and the ratio of carbon source and polymer to solvent is 10g:100g; mix uniformly to make a uniform and stable precursor solution;

[0025] The second step: the above precursor solution is made into a precursor fiber film by electrospinning method; electrospinning parameters: spinning temperature is 25°C, relative humidity is 45%, perfusion speed is 1mL / h, receiving distance is 15cm , the spinning voltage is 15kV;

[0026] Step 3: Pre-oxidize the above-mentioned precursor fiber membrane in an air atmosphere. The pre-oxidation ...

Embodiment 2

[0029] This example provides a method for preparing a flexible and dense carbon nanofiber membrane. The difference between the preparation method and Example 1 is that in step (4), carbonization is carried out under a nitrogen gas atmosphere, and the calcination refers to the calcination temperature Gradually rise from room temperature to 900°C, the heating rate is 2°C / min, the nitrogen flow rate is 200mL / min, and the temperature is kept at the highest calcination temperature for 120min, and the temperature is naturally lowered.

Embodiment 3

[0031] This example provides a method for preparing a flexible and dense carbon nanofiber membrane. The difference between the preparation method and Example 1 is that in step (4), carbonization is carried out under a nitrogen gas atmosphere, and the calcination refers to the calcination temperature Gradually increase from room temperature to 1000°C, the heating rate is 2°C / min, the nitrogen flow rate is 200mL / min, and the temperature is kept at the highest calcination temperature for 120min, and the temperature is naturally lowered.

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Abstract

The invention relates to the technical field of carbon fiber membranes, in particular to a preparation method and application of a flexible compact carbon nano carbon fiber membrane. The preparation method comprises the following steps of: firstly, dissolving two polymers in a solvent in sequence, and uniformly mixing to prepare a precursor solution, the precursor solution having interpenetratingand interlaced long molecular chains, then preparing a precursor fiber membrane from the precursor solution through an electrostatic spinning technology, carrying out pre-oxidation on the precursor fiber membrane in an air atmosphere, and carrying out in-situ welding on the blend to obtain a stabilized nano fiber membrane, and then carbonizing the stabilized nano fiber membrane in an inert gas atmosphere to obtain the in-situ welding flexible compact carbon nano fiber membrane. The in-situ welding structure effect is formed through the melting point difference of the polymer, the density of the obtained flexible compact carbon nano carbon fiber membrane is increased, more energy storage is achieved, and the defect that in the prior art, the energy storage effect of a carbon nano fiber electrode material is poor is overcome.

Description

technical field [0001] The invention relates to the technical field of carbon fiber membranes, more specifically, to a preparation method and application of a flexible and dense carbon nanometer carbon fiber membrane. Background technique [0002] As an electrode material with high strength, low density, good electrical conductivity, thermal conductivity, and diverse forms, carbon nanofibers have broad application prospects in energy fields such as lithium-ion batteries, sodium-ion batteries, and supercapacitors. Carbon electrodes, which have been commercialized for many years, have become the most promising electrode materials due to their abundant porosity, large specific surface area, and low cost. At present, the methods for preparing carbon nanofibers mainly include electrospinning method, template method, chemical vapor deposition method and so on. Among them, the electrospinning method is a simple and feasible method to prepare continuous CNF films with various morph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587H01M10/0525H01M10/054D01F9/22D01F9/21
CPCH01M4/587H01M10/0525H01M10/054D01F9/22D01F9/21Y02E60/10
Inventor 闫建华蔡伟萍雷灿赖毅梅王先锋贾永堂
Owner WUYI UNIV