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Electrode material preparation method

A technology of electrode materials and nanomaterials, which is applied in the field of preparation of electrode materials, can solve the problems of low conductivity and specific surface area, uneven pore size distribution, and complicated preparation process of carbon materials used in electrodes, so as to improve electrochemical performance and improve the preparation process. Simple, the effect of increasing the specific surface area

Inactive Publication Date: 2018-01-26
深圳技术大学筹备办公室
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The present invention provides a method for preparing electrode materials, aiming to solve the problems that the existing carbon materials for electrodes have low electrical conductivity and specific surface area, and uneven pore size distribution, which leads to further improvement in the performance of supercapacitors
And because the existing nanoporous carbon materials also have complicated preparation process, long preparation time and high cost, etc. restrict their application as electrode materials in supercapacitors

Method used

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preparation example Construction

[0017] The present invention provides a kind of preparation method of electrode material, and this method comprises:

[0018] The solution containing magnesium ions is mixed with the solution containing hydroxide ions, filtered and separated to obtain nano-magnesium hydroxide materials;

[0019] Disperse the nanomaterials in N,N-dimethylformamide to obtain a dispersion, then add polyacrylonitrile and heat at 50-80°C for 1-4 hours to obtain a mixed mucus, and the amount of polyacrylonitrile in the obtained mixed mucus The mass fraction is 5-15%;

[0020] Electrospinning the mixed mucus, and heat-treating the obtained raw silk in air atmosphere at 250-300°C for 0.5-2 hours;

[0021] Heating the heat-treated raw silk in a nitrogen atmosphere at 800-1000°C for 3-5 hours, cleaning and drying to obtain an electrode of an in-situ nitrogen-doped carbon fiber / magnesia composite material; making the obtained composite material into an acid treatment to obtain the in-situ nitrogen-dope...

Embodiment 1

[0035] 1. Dissolving magnesium nitrate hexahydrate and sodium hydroxide in deionized water respectively to obtain magnesium nitrate solution and sodium hydroxide solution;

[0036] 2. While stirring, slowly add sodium hydroxide solution dropwise to magnesium nitrate solution for reaction, heat the obtained turbid solution in a water bath to 100°C, stir, reflux for 3 hours, cool to room temperature, and then perform centrifugation to obtain nano-hydrogen Magnesium oxide material;

[0037] 3. Disperse the obtained 10g nano-magnesium hydroxide material in 90g N,N-dimethylformamide to obtain a dispersion liquid, add 35g polyacrylonitrile to the dispersion liquid, and heat at 70°C for 3 hours to obtain a mixed mucus ;

[0038] 4. Electrospinning the mixed mucus at a temperature of 25°C, a voltage of 12 kV, and a humidity of 40%, and heat-treating the obtained raw silk in an air atmosphere at 280°C for 1 hour;

[0039] 5. Heat the raw silk after heat treatment in a nitrogen atmosp...

Embodiment 2

[0041]1. Disperse 10g of nano-magnesium hydroxide powder in 90g of N,N-dimethylformamide to obtain a dispersion, add 35g of polyacrylonitrile to the dispersion, and heat at 70°C for 3 hours to obtain a mixed mucus;

[0042] 2. Electrospinning the mixed mucus at a temperature of 25°C, a voltage of 12 kV, and a humidity of 40%, and heat-treating the obtained raw silk in an air atmosphere at 280°C for 1 hour;

[0043] 3. Heat the raw silk after heat treatment in a nitrogen atmosphere at 900°C for 4 hours, soak the heated material in hydrochloric acid, wash it with deionized water, and dry the cleaned material at 60°C to obtain the raw silk Nitrogen-doped porous carbon fiber electrode materials.

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Abstract

The invention provides an electrode material preparation method and relates to the technical field of a cell. The method comprises steps that a nanometer inorganic material is dispersed into N, N-dimethyl formamide to acquire dispersion liquid, polyacrylonitrile is then added, mixture is heated under 70 DEG C temperature condition for 1 hour to acquire mixture dense liquid, mass percentage of thepolyacrylonitrile of the mixture dense liquid is 15%, static spinning of the mixture dense liquid is carried out, thermal treatment of acquired protofilament is carried out under 250 DEG C condition in the air atmosphere for 0.5 hour, the protofilament after thermal treatment is heated in the nitrogen atmosphere under 800 DEG C condition for 3 hours, through cleaning and drying, an in-situ nitrogen doping carbon fiber / magnesium oxide composite material is acquired, and acid treatment of the composite material is carried out to acquire an in-situ nitrogen doping nano porous carbon fiber electrode material. The method is advantaged in that the process is simple, the preparation process is environmental friendly, the raw materials are cheap, the specific surface area of the material can be improved through adding the nano material, the polyacrylonitrile is added to acquire the in-situ nitrogen doping material, and electrochemical performance of the material can be improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a preparation method of an electrode material. Background technique [0002] Supercapacitors have attracted great attention as electrochemical energy storage devices due to their high energy density, fast charge-discharge rate, and good cycle stability. [0003] The key to improving the performance of supercapacitors is the optimization of electrode materials. At present, in the prior art, commonly used carbon materials include activated carbon, carbon fiber, carbon nanotube, graphene and the like. However, the electrical conductivity and specific surface area of ​​the existing carbon materials for electrodes are relatively low, and the pore size distribution is not uniform, so the performance of the supercapacitor needs to be further improved. In addition, the existing nanoporous carbon materials still have the problems of complex preparation process, long preparation time a...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/32H01G11/36D01F1/10D01F9/22B82Y30/00
Inventor 韩雨来孙茜阮双琛韩培刚
Owner 深圳技术大学筹备办公室
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