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Preparation method and application of a carbon fiber/three-dimensional network graphene composite material

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

Active Publication Date: 2019-03-08
上海格素电子科技有限公司
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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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  • Preparation method and application of a carbon fiber/three-dimensional network graphene composite material
  • Preparation method and application of a carbon fiber/three-dimensional network graphene composite material
  • Preparation method and application of a carbon fiber/three-dimensional network graphene composite material

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Effect test

Embodiment 1

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

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

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

[0033] 3. Coat the mixed slurry obtained in step 2 on carbon fiber paper or PAN fiber membrane (size 1cm×2cm, thickness 30um)...

Embodiment 2

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

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

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

[0040] 3. Coat the mixed slurry obtained in step 2 on carbon fiber paper (size 1cm×1cm, thickness 30um), the coating amount of the mixed slurry is 3mL, and let it dry overnight; then send it to the tube furnace, Annealing is performed in an argon atmosphere, the annealing temperature is 750°C, the annealing time is ...

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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 nano materials. Background technique [0002] As a new type of green energy storage device, electrochemical supercapacitors have gained widespread attention due to their high power density, high charge and discharge efficiency, large charge and discharge rate, and long life. Electrode material is one of the important factors that determine the electrochemical stability, power density and energy density of supercapacitors, and is a current research hotspot. As a common electrode material for supercapacitors, carbon materials have a higher specific surface area, better stability and longer cycle life. Carbon materials have various structures, such as carbon nanotubes, block activated carbon, carbon balls, and layered graphene. Among them, carbon fiber is a kind of carbon material with fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/32H01G11/36H01G11/40H01G11/86
CPCY02E60/13
Inventor 闫健王伟杰欧大为秦清清吴玉程
Owner 上海格素电子科技有限公司
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