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Fe3O4/porous carbon nanofiber and preparation method and application thereof

A technology of nanofibers and porous carbons, applied in nanocarbons, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of low electrical conductivity, lack of surface area, high contact resistance and insufficient capacitance display, etc., to achieve fast ion transmission, electrochemical The effect of excellent performance and excellent cycle stability

Inactive Publication Date: 2020-07-17
甘肃农业职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, iron oxide as a pseudocapacitor electrode material suffers from high contact resistance and insufficient capacitance display due to its inherently low electrical conductivity and lack of accessible surface area.

Method used

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  • Fe3O4/porous carbon nanofiber and preparation method and application thereof
  • Fe3O4/porous carbon nanofiber and preparation method and application thereof
  • Fe3O4/porous carbon nanofiber and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0042] The embodiment of the present invention provides a kind of Fe 3 o 4 / Porous carbon nanofibers and their preparation methods and applications solve the problem of relatively poor cycle stability of pseudocapacitor electrode materials in the prior art, and are prone to structural collapse and iron oxide as a pseudocapacitor electrode material has high contact resistance and insufficient capacitance display The problem.

[0043] The specific technical solution to solve the above problems in the embodiment of the application is: a kind of Fe 3 o 4 A preparation method for porous carbon nanofibers, comprising the following steps:

[0044] S1. Dissolving straw liquefied carbon, polyacrylonitrile, polymethyl methacrylate and iron acetylacetonate in N,N-dimethylformamide and mixing to obtain an electrospinning solution;

[0045] Specifically, the straw is one of hemp straw, corn straw, wheat straw, rice straw and rapeseed straw.

[0046] Specifically, the specific preparat...

Embodiment 2

[0055] A kind of Fe of the embodiment of the present invention 3 o 4 A preparation method for porous carbon nanofibers, comprising the following steps:

[0056] S5: Weigh a certain amount of wheat straw, wash it with deionized water, dry it in an oven at 80°C for 8 hours, crush the dried straw and pass it through a 100-mesh sieve, add 5 times the mass of straw powder and 10% of the mass of phenol and straw powder Phosphoric acid, wherein phosphoric acid is used as a catalyst, refluxed in an oil bath at 160°C for 2.5h, cooled to room temperature to obtain straw liquefied carbon;

[0057] S6: 1 part of liquefied carbon from corn stalks, 9 parts of polyacrylonitrile and 0.3 part of iron acetylacetonate were dissolved in N,N-dimethylformamide and mixed to obtain an electrospinning solution;

[0058] S7: Add the electrospinning solution into a syringe with a stainless steel needle, the positive high voltage of electrospinning is 15kV, the negative high voltage is -2kV, the distan...

Embodiment 3

[0061] A kind of Fe of the embodiment of the present invention 3 o 4 A preparation method for porous carbon nanofibers, comprising the following steps:

[0062] S5: Weigh a certain amount of hemp stalks, wash them with deionized water, and dry them in an oven at 80°C for 8 hours. Crush the dried stalks and pass them through a 100-mesh sieve. Add 5 times the weight of phenol and 10% of the weight of the straw powder Phosphoric acid, wherein phosphoric acid is used as a catalyst, refluxed in an oil bath at 160°C for 2.5h, cooled to room temperature to obtain straw liquefied carbon;

[0063] S6: Take 1 part of liquefied carbon of cannabis straw, 9 parts of polyacrylonitrile, 1.11 parts of polymethyl methacrylate and 0.3333 parts of iron acetylacetonate, dissolve them in N, N-dimethylformamide and mix them to obtain an electrospinning solution;

[0064] S7: Add the electrospinning solution into a syringe with a stainless steel needle, the positive high voltage of electrospinning...

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Abstract

The invention discloses a Fe3O4 / porous carbon nanofiber and a preparation method and application thereof. The invention relates to the technical field of an electrode material and a preparation methodthereof, and the preparation method comprises the following steps: firstly, dissolving straw liquefied carbon, polyacrylonitrile, polymethyl methacrylate and ferric acetylacetonate in N, N-dimethylformamide, uniformly mixing to obtain an electrostatic spinning solution, spinning the electrostatic spinning solution in the step S1 by using electrostatic spinning equipment to obtain nanofibers, andcarrying out carbonization treatment on the nanofibers in the step S2 to obtain the Fe3O4 / porous carbon nanofibers. According to the method, the straw is prepared into the carbonization liquid, and the carbonization liquid is applied to preparation of the electrode material, so that the utilization rate of the straw is increased, the production cost of the electrode material is reduced, and the application of the biomass material in electrostatic spinning is expanded.

Description

technical field [0001] The invention relates to the technical field of electrode materials and preparation methods thereof, in particular to a Fe 3 o 4 / Porous carbon nanofibers and their preparation methods and applications. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the advantages of fast charging, fast discharging, excellent cycle stability and high power density, and suitable electrode materials are the key to the development of high-performance supercapacitors. [0003] At present, the main electrode materials of supercapacitors are carbon materials, transition metal compounds and conductive polymers. Carbons, including graphene, activated carbon, carbon nanofibers, etc., are used as materials for double-layer capacitors, while transition metal oxides and conducting polymers are used as pseudocapacitor materials. Carbon materials have stable electrochemical properties, good conductivity, low capacity and low energy ...

Claims

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Application Information

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IPC IPC(8): C01G49/08C01B32/15D01F9/16H01G11/24H01G11/34H01G11/36H01G11/44
CPCC01G49/08C01B32/15D01F9/16H01G11/44H01G11/34H01G11/36H01G11/24C01P2002/88C01P2004/03C01P2004/04C01P2002/85C01P2002/72C01P2002/82C01P2004/01C01P2006/40C01P2002/70
Inventor 姜霞马婵媛毕文
Owner 甘肃农业职业技术学院
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