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Preparation method of acid-resistant carbon-coated metal oxide/self-supporting carbon nanofiber composite material

A carbon nanofiber, composite material technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of difficult to improve material utilization, complex preparation methods, and limited wide application.

Active Publication Date: 2020-07-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to improve the utilization rate of materials for common doping methods, and for traditional composite methods, the preparation method is too complicated and difficult to produce in large quantities.
Moreover, most transition metal oxide electrodes cannot be used in acidic environments, which limits their wide application

Method used

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  • Preparation method of acid-resistant carbon-coated metal oxide/self-supporting carbon nanofiber composite material
  • Preparation method of acid-resistant carbon-coated metal oxide/self-supporting carbon nanofiber composite material
  • Preparation method of acid-resistant carbon-coated metal oxide/self-supporting carbon nanofiber composite material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for preparing a carbon-coated iron oxide / carbon nanofiber material, specifically as follows:

[0031] (1) Weigh 0.8g of β-cyclodextrin (β-CD), 0.6g of iron acetylacetonate, and 1g of polyacrylonitrile (PAN, MW=150000), and add them into 10mL N,N-dimethylformamide (DMF) , stirred in a constant temperature water bath until completely dissolved, and prepared into a spinning precursor solution; the spinning precursor solution was placed in a 10mL needle tube for electrospinning under an electrostatic field of 15kV, and the distance between the receiving plate and the needle head was 15cm to obtain a nanofiber film;

[0032] (2) Place the nanofibrous membrane obtained by electrospinning in a muffle furnace, raise the temperature in the air to 260 ° C at a rate of 1 ° C / min and stay for 1 h to complete the pre-oxidation process, and then in a nitrogen atmosphere, the pre-oxidation The nanofibrous membrane after oxidation treatment is placed...

Embodiment 2

[0035] This embodiment provides a method for preparing a carbon-coated iron oxide / carbon nanofiber material, specifically as follows:

[0036] (1) Weigh 1g of γ-cyclodextrin (β-CD), 0.8g of iron acetylacetonate, and 1g of polyacrylonitrile (PAN, MW=150000), and add them into 10mL of N,N-dimethylformamide (DMF), Stir in a constant temperature water bath until it is completely dissolved, and prepare a spinning precursor solution; place the spinning precursor solution in a 10mL needle tube for electrospinning under a 15kV electrostatic field, and the distance between the receiving plate and the needle head is 15cm to obtain a nanofiber film;

[0037](2) Place the nanofiber membrane obtained by electrospinning in a muffle furnace, raise the temperature in air to 260°C at a rate of 1°C / min and stay for 1h to complete the pre-oxidation process; The nanofiber membrane after oxidation treatment is placed in a tube furnace for high-temperature carbonization. The high-temperature carbon...

Embodiment 3

[0040] This embodiment provides a method for preparing a carbon-coated iron oxide / carbon nanofiber material, specifically as follows:

[0041] (1) Weigh 0.8g of β-cyclodextrin (β-CD), 0.8g of cobalt acetate, and 1g of polyacrylonitrile (PAN, MW=150000), and add them into 10mL of N,N-dimethylformamide (DMF), Stir in a constant temperature water bath until it is completely dissolved, and then it is prepared as a spinning precursor solution. The spinning precursor solution was placed in a 10mL needle tube for electrospinning under a 12.5kV electrostatic field, and the distance between the receiving plate and the needle was 10cm to obtain a nanofiber film;

[0042] (2) Place the nanofiber membrane obtained by electrospinning in a muffle furnace, raise the temperature in air to 270°C at a rate of 1°C / min and stay there for 1h to complete the pre-oxidation process; The oxidized nanofiber membrane was placed in a tube furnace for high-temperature carbonization. The high-temperature ...

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Abstract

The invention relates to a preparation method of an acid-resistant carbon-coated metal oxide / carbon nanofiber composite material. The preparation method comprises: dissolving a metal-containing compound, a high-molecular polymer and cyclodextrin in an organic solvent, spinning the polymer solution into a nanofiber precursor through an electrostatic spinning technology, and carrying out pre-oxidation carbonization and acid pickling to obtain the acid-resistant carbon-coated metal oxide / carbon nanofiber composite material. The composite material maintains stable chemical activity in a strongly acidic solution. The product prepared by the invention is simple in preparation method, the preparation method is simple, the cost is low, the stability is good, the carbon nanofiber serving as a carrier increases the conductivity, metal oxide particles are uniformly distributed and coated with a carbon layer, and the carbon nanofiber can be used as an active electrode material of a pseudocapacitor, has high electrochemical activity and high stability under an acidic condition, and can be applied to the fields of energy storage, catalysis and the like.

Description

technical field [0001] The invention relates to a preparation method of an acid-resistant carbon-coated metal oxide / carbon nanofiber composite material. The material prepared by the invention can be used for energy storage and catalysis of a metal oxide pseudocapacitor in an acid electrolyte. Background technique [0002] As an emerging electrode material, metal oxide electrode materials have high specific capacitance and high electrochemical properties. Commonly used metal oxides are Fe 3 o 4 , RuO 2 , MnO 2 、Co 3 o 4 , NiO, V 2 o 5 , SnO 2 and Bi 2 o 3 Wait. [0003] However, the utilization and electrical conductivity of metal oxides are low, limiting their use. Many researchers use various methods, such as doping and compounding on carbon materials such as graphitic carbon, graphene, carbon nanotubes and carbon nanofibers, to improve their performance. Through these methods, not only the conductivity and charge transfer rate of electrode materials can be impr...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/36H01G11/46
CPCH01G11/46H01G11/24H01G11/36Y02E60/13
Inventor 刘建允史威张赫轩朱国栋聂鹏飞胡彬
Owner DONGHUA UNIV
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