Carbon fiber/three-dimensional network graphene composite material preparation method and application thereof

A three-dimensional network, composite material technology, applied in the field of nanomaterials, can solve the problems of poor electrochemical performance, small specific surface area of ​​carbon fiber, low capacitance quality, etc., and achieve the effect of high electrical conductivity, high specific surface area, and increased specific surface area.

Active Publication Date: 2018-03-23
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the specific surface area of ​​carbon fiber is small, and the capacitance quality is relatively low. It is directly used as the electrode material of supercapacitor, and its electrochemical performance is poor.

Method used

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  • Carbon fiber/three-dimensional network graphene composite material preparation method and application thereof
  • Carbon fiber/three-dimensional network graphene composite material preparation method and application thereof
  • Carbon fiber/three-dimensional network graphene composite material preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of carbon fiber / three-dimensional network graphene composite material in the present embodiment is as follows:

[0031] 1. Weigh 3 g of PVA solid (molecular weight=20000), add 30 ml of distilled water, and then heat up to 80 ° C and stir to dissolve to obtain a PVA solution; 1.5 g of KOH solid is dissolved in 20 ml of distilled water, then mixed with the PVA solution, and stirred at 70 ° C for 10min , to obtain PVA-KOH solution;

[0032] 2. Weigh 1 g of glucose powder, 1 g of red phosphorus and 0.05 g of nickel acetate, add 30 ml of distilled water, and stir at 70°C for 5 hours until the solution is viscous to obtain a mixture of glucose-red phosphorus-nickel acetate; 10 mL of the PVA-KOH solution obtained in this step was mixed with 10 mL of the glucose-red phosphorus-nickel acetate mixed solution obtained in this step, and stirred evenly to obtain a mixed slurry;

[0033] 3. Coat the mixed slurry obtained in step 2 on carbon fiber paper or PAN ...

Embodiment 2

[0037] The preparation method of carbon fiber / three-dimensional network graphene composite material in the present embodiment is as follows:

[0038] 1. Weigh 1.5g of KOH solid, add 30ml of distilled water, stir and dissolve on a magnetic stirrer to obtain a KOH solution;

[0039] 2. Weigh 3g of glucose, 0.6g of nickel acetate and 0.8g of red phosphorus respectively, add 20mL of distilled water to mix, and stir at 80°C until the solution is viscous to obtain a glucose-red phosphorus-nickel acetate mixed solution; obtain step 1 10 mL of the KOH solution obtained in this step was mixed with 10 mL of the glucose-red phosphorus-nickel acetate mixed solution obtained in this step, and stirred evenly to obtain a mixed slurry;

[0040] 3. Coat the mixed slurry obtained in step 2 on carbon fiber paper (the size is 1cm×1cm, the thickness is 30um), the coating amount of the mixed slurry is 3mL, and it is naturally dried overnight; then sent to a tube furnace, The annealing treatment wa...

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Abstract

The invention discloses a carbon fiber/three-dimensional network graphene composite material preparation method and application thereof. Graphene in a porous and thin layer structure grows on the surface of carbon fiber through a method of coating and heat treatment. A three-dimensional graphene sheet layer structure and carbon fiber form a network structure. The structure has a high specific surface area, can realize rapid transmission of electrons and electrolyte ions at the same time, and improves the capacitance performance. The carbon fiber/three-dimensional network graphene composite material provided by the invention can be directly used as an electrode material, can be used as a conductive substrate, and is further applied to a super capacitor by growing other electrode materials.

Description

technical field [0001] The invention relates to a preparation method and application of a carbon fiber / three-dimensional network graphene composite material, and belongs to the technical field of nanomaterials. Background technique [0002] As a new type of green energy storage device, electrochemical supercapacitors have attracted widespread attention due to their high power density, high charge-discharge efficiency, large charge-discharge rate, and long life. Electrode materials are one of the important factors that determine the electrochemical stability, power density and energy density of supercapacitors, and are currently a research hotspot. As a common electrode material for supercapacitors, carbon materials have high specific surface area, good stability and long cycle life. Carbon materials have various structures, such as carbon nanotubes, bulk activated carbon, carbon spheres, and layered graphene. Among them, carbon fiber is a kind of carbon material with fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/32H01G11/36H01G11/40H01G11/86
CPCY02E60/13H01G11/24H01G11/32H01G11/36H01G11/40H01G11/86
Inventor 闫健欧大为王伟杰秦清清吴玉程
Owner HEFEI UNIV OF TECH
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