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Preparation method and application of high-dispersion metal oxide/carbon nanofiber composite material

A technology of carbon nanofibers and composite materials, applied in the direction of active material electrodes, electrochemical generators, electrical components, etc., can solve the problems of agglomeration or pulverization, low dispersion, large metal oxide particles, etc., and achieve low cost, The effect of simple process and high sodium storage capacity

Pending Publication Date: 2020-10-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The highly dispersed metal oxides generated in situ in the material are closely combined with carbon fibers, and effectively solve the problems of large metal oxide particles, low dispersion, and severe agglomeration or pulverization during charging and discharging. In addition, this process has low preparation costs, Simple process and other advantages, has a wide range of application prospects

Method used

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  • Preparation method and application of high-dispersion metal oxide/carbon nanofiber composite material
  • Preparation method and application of high-dispersion metal oxide/carbon nanofiber composite material
  • Preparation method and application of high-dispersion metal oxide/carbon nanofiber composite material

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Embodiment 1

[0033] The preparation method of material among the present invention is as follows successively:

[0034] (1) According to the mass ratio of polyvinylpyrrolidone: ferrous acetate: polyacrylonitrile: dimethylformamide solution is 1:1:1:10, take the material, stir well and evenly to obtain the spinning stock solution;

[0035] (2) Take the above-mentioned spinning stock solution and place it in the propeller for electrospinning operation, set the electrospinning process parameters to control the voltage at 13kV, the advance rate of the precursor solution is 0.5mL / h, and the receiving distance is 13cm, and then the fiber film is obtained;

[0036] (3) The fiber film was placed in a tube furnace, and under nitrogen atmosphere, the temperature was raised to 800°C at 2°C / min, and the carbonization heat treatment was carried out for 2h, so as to obtain a highly dispersed ferric oxide / carbon nanofiber composite material.

Embodiment 2

[0038] (1) According to the mass ratio of polyvinylpyrrolidone: ferric nitrate: polyacrylonitrile: dimethylformamide solution is 1:1:1:10, take the material, stir fully and evenly to obtain the spinning stock solution;

[0039] (2) Take the above-mentioned spinning stock solution and place it in the propeller for electrospinning operation, set the electrospinning process parameters to control the voltage at 13kV, the advance rate of the precursor solution is 0.5mL / h, and the receiving distance is 13cm, and then the fiber film is obtained;

[0040] (3) The fiber film was placed in a tube furnace, and under nitrogen atmosphere, the temperature was raised to 800°C at 2°C / min, and the carbonization heat treatment was carried out for 2h, so as to obtain a highly dispersed ferric oxide / carbon nanofiber composite material.

Embodiment 3

[0042] (1) According to the mass ratio of polyvinylpyrrolidone: ferric chloride: polyacrylonitrile: dimethylformamide solution is 1:1:1:10, take materials, stir fully and evenly to obtain spinning stock solution;

[0043] (2) Take the above-mentioned spinning stock solution and place it in the propeller for electrospinning operation, set the electrospinning process parameters to control the voltage at 13kV, the advance rate of the precursor solution is 0.5mL / h, and the receiving distance is 13cm, and then the fiber film is obtained;

[0044] (3) The fiber film was placed in a tube furnace, and under nitrogen atmosphere, the temperature was raised to 800°C at 2°C / min, and the carbonization heat treatment was carried out for 2h, so as to obtain a highly dispersed ferric oxide / carbon nanofiber composite material.

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Abstract

The invention discloses a preparation method and application of a high-dispersion metal oxide / carbon nanofiber composite material. The method is characterized by comprising the following steps: dissolving a metal precursor, a dispersing agent and polyacrylonitrile in dimethylformamide, and uniformly mixing to prepare a spinning solution; putting the spinning solution into an electrostatic spinningdevice, and preparing a fiber precursor membrane through electrostatic spinning; performing high-temperature carbonization treatment on the fiber precursor membrane in a nitrogen atmosphere to obtainthe high-dispersion metal oxide / carbon nanofiber composite material, wherein the dispersing agent is any one of malic acid, citric acid, polyvinyl alcohol, polyvinylpyrrolidone and gelatin. The high-dispersion metal oxide / carbon nanofiber composite material prepared by the invention is used as a self-supporting sodium ion battery negative electrode material; the problems that an existing composite material is large in metal oxide particle, low in dispersity, serious in agglomeration or pulverization in the charging and discharging process and the like are solved; and the composite material has the advantages of being simple in preparation process method, low in preparation cost, good in metal oxide dispersity, high in charging and discharging specific capacity, good in cycling stability and the like and has wide application prospects.

Description

technical field [0001] The invention belongs to the category of preparation of new materials for electrochemical energy storage technology, and specifically relates to a preparation method and application of a highly dispersed metal oxide / carbon composite material. Background technique [0002] In recent years, lithium-ion batteries (LIBs) have been widely used commercially due to their long service life and high energy density. However, the reserves of lithium metal are difficult to meet the huge global consumer market, and the problem of shortage of lithium resources has become increasingly prominent. Sodium and lithium, which are abundant in nature, belong to the same main group element, exhibit very similar electrochemical properties, and sodium (-2.71V vs SHE) has a higher chemical potential than lithium (-3.40V vs SHE), which can provide Higher working voltage and energy density. Therefore, sodium-ion batteries (SIBs) suitable for large-scale energy storage systems a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/62H01M10/054
CPCH01M4/525H01M4/625H01M10/054H01M2004/027Y02E60/10
Inventor 赵青山夏争争郭芳曹风亮吴明铂李忠涛胡涵宁汇
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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