Graphene material and preparation method of electrode material of graphene material

A graphene and porous graphene technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as halide-intercalated graphene, and achieve excellent cycle stability, improved integrity, and high efficiency.

Active Publication Date: 2015-09-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been related methods of exfoliating graphene using halide-intercalated graphite as products, and research on intercalating halides in multi-layer graphene, there has been no direct exfoliation of halide-intercalated graphite composites to prepare halide-intercalated Invention of Graphene Announced

Method used

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  • Graphene material and preparation method of electrode material of graphene material
  • Graphene material and preparation method of electrode material of graphene material
  • Graphene material and preparation method of electrode material of graphene material

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Using ferric chloride as the intercalation agent and 300 mesh flake graphene as the precursor, the first-order graphite intercalation compound was prepared by the molten salt intercalation method. Add 100 mg of graphite intercalation compound with ferric chloride as intercalation agent into 100 mL of N,N-dimethylformamide solvent, break the cells in an ice bath and sonicate for 6 hours to obtain a graphene suspension. Filter the graphene suspension with a 0.2-micron organic filter membrane, wash with ethanol, and then add deionized water to wash after suction filtration. The slurry after suction filtration is freeze-dried to obtain graphene with a yield of about 95%. .

[0039] Such as figure 1 As shown, in Example 1, the graphite intercalation compound after intercalation is uniformly intercalated with an intercalation agent to form an accordion-like loose structure, which is easy for subsequent peeling off.

[0040] Such as figure 2 As shown, in Example 1, after t...

Embodiment 2

[0043] Using ferric chloride as the intercalation agent and 300 mesh flake graphene as the precursor, the first-order graphite intercalation compound was prepared by the molten salt intercalation method. Add 100 mg of graphite intercalation compound with ferric chloride as the intercalation agent to 100 mL of N, N-dimethylformamide solvent, break the cells in an ice bath and sonicate for 1 hour to obtain ferric chloride intercalated porous graphene suspension . Filter the graphene suspension with a 0.2-micron organic filter membrane, wash with ethanol, and then add deionized water to wash after suction filtration. The slurry after suction filtration is freeze-dried to obtain graphene with a yield of about 90%. .

[0044] Such as Figure 4 As shown, in Example 2, the black spots in the figure are ferric chloride, indicating that ferric chloride is stable and evenly distributed between the graphite layers.

[0045] Such as Figure 5 As shown, in Example 2, the ferric chlorid...

Embodiment 3

[0047] Using ferric chloride as the intercalation agent and 300-mesh flake graphene as the precursor, the second-order graphite intercalation compound was prepared by the molten salt intercalation method. Add 100 mg of graphite intercalation compound with ferric chloride as intercalation agent into 100 mL of N,N-dimethylformamide solvent, break the cells in an ice bath and sonicate for 3 hours to obtain a graphene suspension. The suspension of graphene is filtered with a 0.2 micron organic filter membrane, and washed with ethanol. After suction filtration, deionized water is added to clean, and the slurry after suction filtration is freeze-dried to obtain two-layer graphene with a yield of 95%. %about.

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Abstract

The invention relates to a halide intercalated porous graphene material. The halide intercalated porous graphene material contains porous graphene sheets and a halide; the halide is intercalated between the porous graphene sheets; the particles of the halide are evenly spread between the porous graphene sheets at one single layer. The preparation method of the halide intercalated porous graphene material comprises the steps of taking a halide intercalated graphite compound as the raw materials and performing ultrasonic stripping on the raw material in a solvent to prepare the halide intercalated porous graphene material. The method is simple; the raw material is cheap and the equipment is easy to obtain; the production cost of the graphene is greatly reduced; in short, the method can be widely applied to the field of preparation of lithium-ion reversible battery electrode materials, energy source materials, conductive materials, heat-conducting materials and the like.

Description

technical field [0001] The invention relates to a preparation method of a graphene material, in particular to a halide intercalation porous graphene material and a preparation method thereof, as well as its application mainly in lithium-ion battery electrode materials. Background technique [0002] Graphene, 2D sp 2 Hybridized carbons are the most studied materials today. It is a monoatomic layer of carbon atoms arranged in a honeycomb shape, becoming the thinnest, hardest and toughest material in the world, and an excellent conductor of heat and electricity. After being isolated as early as 2004, many studies have shown that this single atomic layer carbon material uniquely combines superior mechanical strength, exhibits high electronic and thermal conductivity, high surface area and impermeability to gases, besides There are many other desirable characteristics, all of which make it an attractive application. It is considered to be the basic structural unit of fullerene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04H01M4/583H01M4/587
CPCY02E60/10
Inventor 张好斌齐新于中振郭瑞文张航天
Owner BEIJING UNIV OF CHEM TECH
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