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Graphene aggregate composite material, and preparation method and application thereof

A composite material and aggregate technology, which is applied in the field of graphene aggregate composite material and graphene aggregate composite material preparation, can solve problems such as back stacking, increase specific surface area, and prevent graphene sheets from back stacking. Effect

Inactive Publication Date: 2018-03-27
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new graphene aggregate composite material, a preparation method of a graphene aggregate composite material, and the The obtained graphene aggregate composite material and its application

Method used

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Examples

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specific Embodiment approach

[0027] According to a specific embodiment of the present invention, the preparation method of the graphene aggregate composite material comprises the following steps: ① at room temperature, mixing layered graphite, oxidizing agent and acid solution to obtain a mixture, and stirring the Heat the mixture to 40-60°C for 1-4h, wash with water, and dry to obtain graphite oxide; ②Put graphite oxide into a nitrogen-protected high-temperature furnace, then heat it at 300-1500°C for 5-300s, and obtain graphite after cooling 3) put the graphene aggregates into a sealed container, vacuumize, and pass through the gas capable of high-temperature deposition to generate nanoparticles, and cycle three times; ④ put the above-mentioned sealed container into a high-temperature furnace, and then heat ℃ for 1-10min to obtain a graphene aggregate composite material.

[0028] The present invention also provides the graphene aggregate composite material prepared by the above method.

[0029] In addi...

Embodiment 1

[0036] This embodiment is used to illustrate the graphene aggregate composite material provided by the present invention and its preparation method.

[0037] (1) Formulation:

[0038] The ingredients and weight ratios of the formula used in this embodiment are as follows: 100 parts of flake graphite (purchased from Qingdao Haoyuan Graphite Co., Ltd., the brand is T98, the same below), potassium permanganate (molecular formula KMnO 4 ) 50 parts, sulfuric acid (molecular formula H 2 SO 4 , concentration is 98% by weight) 300 parts, nitric acid (molecular formula HNO 3 , concentration is 65% by weight) 300 parts.

[0039] Gas composition: SiH 4 gas.

[0040] (2) Preparation of graphene aggregate composite material:

[0041] Mix graphite flakes, potassium permanganate, sulfuric acid and nitric acid at room temperature, heat the mixture to 40°C under stirring, react with stirring for 2 hours, wash and dry with water to obtain graphite oxide. Put the graphite oxide into a nit...

Embodiment 2

[0043] This embodiment is used to illustrate the graphene aggregate composite material provided by the present invention and its preparation method.

[0044] (1) Formulation:

[0045] The ingredients and weight ratios of the formula used in this embodiment are as follows: 100 parts of intercalated graphite (purchased from Shanghai Humai Composite Material Co., Ltd., the trade mark is KP425), sodium persulfate (molecular formula Na 2 S 2 o 8 ) 150 parts, perchloric acid (molecular formula H 2 ClO 4 , concentration is 60% by weight) 1000 parts.

[0046] Gas composition: Ni(CO) 4 gas.

[0047] (2) Preparation of graphene aggregate composite material:

[0048] Mix the intercalated graphite, sodium persulfate and perchloric acid at room temperature, heat the mixture to 60° C. under stirring, react with stirring for 4 hours, wash and dry to obtain graphite oxide. Put graphite oxide into a nitrogen-protected high-temperature furnace, then heat it at 1000°C for 5s, and obtain ...

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Abstract

The invention specifically discloses a graphene aggregate composite material, and a preparation method and application thereof, belonging to the field of graphene. The preparation method for the graphene aggregate composite material comprises the following steps: subjecting layered graphite, an oxidizing agent and an acid solution to an oxidation reaction so as to obtain graphite oxide; then subjecting the graphite oxide to high-temperature treatment to realize exfoliation of the graphite oxide into graphene so as to obtain graphene aggregate; and subjecting the graphene aggregate to high-temperature vapor deposition in the presence of gas capable of producing nanoparticles through high-temperature deposition so as to produce nanoparticles among different graphene layers of the graphene aggregate. According to the preparation method for the graphene aggregate composite material, the nanoparticles are deposited among the graphene layers, so lamellas are sufficiently isolated; and thus,a specific surface area is increased, and back lamination of graphene lamellas in later treatment can be prevented.

Description

technical field [0001] The present invention relates to the field of graphene, in particular to a graphene aggregate composite material, a method for preparing a graphene aggregate composite material, a graphene aggregate composite material prepared by the method and applications thereof. Background technique [0002] Graphite is formed by stacking planar carbon atoms arranged in a honeycomb shape layer by layer. The interlayer force of graphite is weak, and it is easy to peel off each other to form thin graphite sheets. When the graphite sheet is peeled off into a single layer, this single layer with a thickness of only one carbon atom is graphene. The graphene aggregate refers to a material formed by stacking multiple layers of graphene. This material has a large specific surface area and is mainly used for energy storage or further dispersion to prepare graphene powder. [0003] At present, the methods for preparing graphene mainly include physical and chemical methods. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C01B32/194
CPCC01B2204/32C01P2004/03C01P2004/80
Inventor 林信平吴猛祥任茂林孙荣严王文韬周松林文熹杨剑卫
Owner BYD CO LTD
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