A doped carbide c 60 Preparation method of microstrip graphene airgel composite electrode material

A technology of graphene airgel and graphene hydrogel, which is applied in the direction of graphene, carbon compounds, chemical instruments and methods, etc., can solve the problems of low strength, small specific surface area, high resistance, etc., and achieve high porosity, The effect of large surface area and low resistance

Active Publication Date: 2020-05-01
江西宏柏新材料股份有限公司
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Problems solved by technology

[0003] The present invention aims to solve the technical problems of low strength, small specific surface area and high resistance of the existing graphene aerogels, and provides a carbon doped 60 Preparation method of microstrip graphene airgel composite electrode material

Method used

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  • A doped carbide c <sub>60</sub> Preparation method of microstrip graphene airgel composite electrode material
  • A doped carbide c <sub>60</sub> Preparation method of microstrip graphene airgel composite electrode material
  • A doped carbide c <sub>60</sub> Preparation method of microstrip graphene airgel composite electrode material

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specific Embodiment approach 1

[0015] Specific implementation mode one: the doped carbide C of this embodiment mode 60 The preparation method of the graphene airgel composite electrode material of microstrip, carries out as follows:

[0016] 1. Preparation of carbonized C 60 Microstrip:

[0017] Add isopropanol dropwise to C 60 CS 2 solution, standing at room temperature, in isopropanol with CS 2 Formation of C in the middle of the two phases 60 Microstrip, take it out and vacuum-dry it, then put it into a tube furnace, heat it to 800℃~1000℃ under the protection of nitrogen and keep it warm for 2~2.5h to get carbonized C 60 Microstrip;

[0018] 2. Disperse graphene oxide in deionized water to form a graphene oxide dispersion with a mass concentration of 2 to 7 mg / mL, then adjust the pH of the graphene oxide dispersion to 8 to 11 with ammonia water, and then add ascorbic acid to make Reducing agent, to obtain a mixed solution; carbonize C 60 Add the microstrip into the mixed solution and mix evenly, ...

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is that C described in step one 60 CS 2 C in solution 60 The concentration is 2-4 mg / ml; other is the same as Embodiment 1.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the volume of isopropanol described in step one and C 60 The mass ratio is 1 ml: (0.6-0.8) mg; the others are the same as Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method for a carbonized C60 micro-strip-doped graphene aerogel composite electrode material, relates to the preparation method for the graphene aerogel compositeelectrode material, and aims to solve the technical problems that the existing graphene aerogel is low in strength, small in specific area and high in resistance. The method comprises the following steps: preparing carbonized C60 micro-strips first; after the pH value of a graphene oxide dispersing liquid is regulated, adding ascorbic acid, and then, adding the carbonized C60 micro-strips, mixinguniformly, and performing hydrothermal reaction to obtain carbonized C60 micro-strip-doped graphene aerogel; and performing dialysis and freeze-drying to obtain the carbonized C60 micro-strip-doped graphene aerogel composite electrode material. The material has the specific capacitance of 150 to 153 F / g at the current density of 0.5 A / g, has very good rate capability, and basically does not have capacity loss after 1,000 times of charging / discharging; and the resistance is only 0.38 to 0.40 ohm. The material can be applied to the field of batteries.

Description

technical field [0001] The present invention relates to a doped C 60 Microstrip graphene airgel composite electrode material and preparation method thereof. Background technique [0002] Graphene has excellent electrical, optical, and mechanical properties, but there are various problems in the direct use of flake graphene as an electrode material, such as easy agglomeration, and the inability to prepare larger graphene sheets due to the constraints of natural conditions. These shortcomings severely limit the application of graphene in batteries, so reducing the accumulation of graphene sheets becomes particularly important. At present, the preparation of graphene airgel is a way to obtain a porous graphene macrostructure with a large specific surface area. For example, the Chinese patent with the application number 201810033667.X discloses a method for preparing graphene airgel. The method is to freeze the graphene slurry or dispersion to obtain ice particles, and then fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194
CPCC01B32/194C01B2204/22
Inventor 纪冠丞张磊李季
Owner 江西宏柏新材料股份有限公司
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