Pure carbon fiber material adopting 'vesical string' structure and preparation method of pure carbon fiber material

A technology of carbon fiber materials and fiber materials, applied in the field of "vesicle string" structure carbon fiber materials and its preparation, can solve problems such as difficult to meet practical applications and single structure, and achieve ingenious design ideas, easy operation, and mild preparation process Effect

Inactive Publication Date: 2016-07-06
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional electrospun nanofibers have a smooth surface and a single structure, which is difficult to meet the needs of practical applications

Method used

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  • Pure carbon fiber material adopting 'vesical string' structure and preparation method of pure carbon fiber material
  • Pure carbon fiber material adopting 'vesical string' structure and preparation method of pure carbon fiber material
  • Pure carbon fiber material adopting 'vesical string' structure and preparation method of pure carbon fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment includes the following steps:

[0045] (1) Dissolving polyacrylonitrile in dimethylformamide to prepare spinning solution, and preparing polyacrylonitrile nanofiber membrane through single-needle electrospinning technology;

[0046] (2) Place the polyacrylonitrile fiber membrane in a blast oven for pre-oxidation;

[0047] (3) Put the pre-oxidized polyacrylonitrile in 25mg / mLFeCl 3 ·6H 2 Obtain the polyacrylonitrile fiber that ferric oxyhydroxide is modified in O salt solution, be denoted as PANFeOOH;

[0048] (4) Put PANFeOOH in 1 mg / mL dopamine solution for 3 hours to obtain a coating layer of polydopamine, denoted as PANFeOOHPDA;

[0049] (5) Carry out high-temperature carbonization of PANFeOOHPDA to obtain "vesicle string" nanofibers containing ferric oxide in the vesicles, which are denoted as CNFFe 3 o 4 NC;

[0050] (6) will CNFFe 3 o 4 The NC is soaked in acid solution to remove iron oxides in the system to obtain pure carbon fibers with a...

Embodiment 2

[0052] The dopamine soaking time in Example 1 was changed to 6h, and the rest were the same as in Example 1. The hybrid material finally obtained was denoted as CNFNC-2. This material also showed good oxygen reduction catalytic activity, and its onset potential was low to 90mV(Vs.RHE), the steady state current density reaches 5.3mAcm -2 .

Embodiment 3

[0054] Change the solubility of the dopamine solution in Example 1 to 2mg / mL, and the rest are the same as in Example 1. The hybrid material obtained at last is denoted as CNFNC-3, and this material also shows a property slightly inferior to that of CNFNC and CNFNC-2. Oxygen reduction catalytic activity, its onset potential is as low as 90mV (Vs.RHE), and the steady-state current density is 4.2mAcm -2 .

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Abstract

The invention belongs to the technical field of nano-fiber materials, in particular to a pure carbon fiber material adopting a 'vesical string' structure and a preparation method of the pure carbon fiber material. The preparation method comprises the following steps: preparing a spinning solution from a spinnable polymer material, and preparing nanofibers of uniform structures with an electrostatic spinning device; uploading iron oxide hydroxide cambiform nanorods on the surfaces of the nanofibers uniformly via a water bath or hydrothermal method; soaking an iron oxide hydroxide-modified fiber membrane in a dopamine solution, and controlling the thickness of a polydopamine coating layer by adjusting the concentration of the dopamine solution and the reaction time; carrying out high-temperature carbonization treatment, so as to realize fiber carbonization, and conversion of iron oxide hydroxide to ferroferric oxide as well as polydopamine to a N-doped carbon material; removing ferroferric oxide via soaking in an acid solution. The preparation method is safe and environmentally friendly; the prepared pure carbon fiber material is high in nitrogen content, specific surface area and electric conductivity, and stable in physical and chemical properties, so as to be an ideal electrode material for production of new energy devices such as a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of nanofiber materials, and in particular relates to a carbon fiber material with a "vesicle string" structure and a preparation method thereof. Background technique [0002] Nanofibers are a typical representative of one-dimensional nanomaterials, and electrospinning technology, as a method that can directly and continuously prepare polymer nanofibers, has been widely concerned. The prepared nanofibrous membrane can be widely used in catalyst supports, hydrogen storage materials, adsorption materials and Electrode materials for supercapacitors or lithium-ion batteries, etc., are conducive to solving the energy crisis and environmental pollution problems in today's society. [0003] Traditional electrospun nanofibers have a smooth surface and a single structure, which is difficult to meet the needs of practical applications. The introduction of the multi-level "vesicle" structure not only increases the rou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F9/24D01F9/28D01F9/21D01F1/09D01F11/12B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00D01F1/09D01F9/21D01F9/22D01F9/24D01F9/28D01F11/12
Inventor 刘天西鄢家杰张由芳黄云鹏左立增顾华昊鲁恒毅缪月娥
Owner FUDAN UNIV
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