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Preparation method of thin layer graphene polymer composite material

A thin-layer graphene and composite material technology, applied in the field of nanomaterials, can solve the problems of complex preparation process, difficult cycle life, comparison of activated carbon, etc., and achieve the effects of simple preparation process, environmental friendliness and low cost.

Active Publication Date: 2012-11-14
苏州格瑞丰纳米科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, more studies are conducted on the polymerization of graphene oxide, reduced graphene, etc., with polymer monomers to form graphene-polymer composite materials. There are following deficiencies: one, graphene oxide and reduced graphene have unrecoverable defects, and the preparation process is complicated, the cost is high, and mass production is difficult
Second, graphene oxide and reduced graphene are used as electrode materials for supercapacitors, and the cycle life is difficult to compare with the current commercial activated carbon

Method used

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  • Preparation method of thin layer graphene polymer composite material
  • Preparation method of thin layer graphene polymer composite material

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preparation example Construction

[0026] Further speaking, the preparation method of this thin-layer graphene polymer composite material may comprise the following steps:

[0027] The preparation method of this thin-layer graphene polymer composite material comprises the following steps:

[0028] Provide graphite intercalation compounds;

[0029] Using graphite intercalation compounds to catalyze the reaction with peroxides to prepare thin-layer graphene adsorbed with catalysts;

[0030] Or use the graphite intercalation compound and peroxide catalytic reaction, after purification, the prepared thin-layer graphene, and additionally support the catalyst on the thin-layer graphene, and prepare the thin-layer graphene adsorbed with the catalyst;

[0031] Add polymer monomers to graphite intercalation compounds or thin-layer graphene adsorbed with catalysts to form a mixed reaction system, catalyze polymerization reactions at different temperatures, purify, wash, and dry to obtain composite materials aft...

Embodiment 1

[0045] Example 1 The preparation method of this thin-layer graphene polymer composite material is:

[0046]Graphite sheets are intercalated with concentrated sulfuric acid or metal salts, treated with hydrochloric acid, hydrogen peroxide, water, etc., and finally purified to obtain thin-layer graphene with catalysts adsorbed. React in the kettle at 280°C for 72 h, then soak in 30% hydrogen peroxide at room temperature for 24 h, add 0.5 ml of aniline, 0.5 ml of pyrrole, and 0.5 ml of thiophene to the aqueous solution mixture of 1 g of the product, react at 25°C for 12 h, wash with dilute hydrochloric acid Wash 5 times with aqueous solution, 100 ml each time, wash 5 times with ethanol, 100 ml each time, and then vacuum-dry the product, its form is as follows figure 1 Therefore, the lateral size of graphene is greater than 100 μm, and the polymer is uniformly distributed on the surface of graphene.

Embodiment 2

[0047] Example 2 The preparation method of this thin-layer graphene polymer composite material is:

[0048] 5 g of graphite flakes of 325 mesh and 15 g of ferric chloride were added to an autoclave at 350 °C for 72 h, and then soaked in 30% hydrogen peroxide at room temperature for 24 h, and 1 g of the product was taken from the aqueous solution mixture, and 1 ml of aniline was added to it, 1 ml pyrrole, 1 ml thiophene, react at 50°C for 24 h, wash 10 times with dilute hydrochloric acid aqueous solution, wash 5 times with ethanol each time, 100 ml each time, and then vacuum-dry the product, its form is as follows figure 2 shown. The lateral size of graphene is greater than 100 μm, and the layers have been clearly separated, indicating that the graphene has been cleaved, and the polymers are distributed on the graphene surface in blocks.

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Abstract

The invention discloses a preparation method of a thin layer graphene polymer composite material. The method includes enabling a graphite intercalation compound and / or thin layer graphene with a catalyst adsorbed on the surface and at least one polymer monomer to form a mixed reaction system and conducting catalytic polymerization reaction under the set condition to obtain the thin layer graphene polymer composite material. An intercalation agent in the graphite intercalation compound and the catalyst are at least selected from any one of inorganic acid, organic acid, halogen, metal salt and metal oxide. The preparation method is simple in process, easy to implement, safe, environment-friendly, low in cost and suitable for industrial batch production. Further, the obtained composite material can be applied to lithium ion battery electrode materials or super capacitor electrode materials.

Description

technical field [0001] The invention specifically relates to a preparation method of a thin-layer graphene polymer composite material, which belongs to the technical field of nanomaterials. Background technique [0002] Energy storage devices mainly include supercapacitors and lithium-ion batteries. An important part of an energy storage device is the electrode, and the material and structure of the electrode have a significant impact on the performance of the energy storage device. Taking a supercapacitor as an example, when a conductive polymer is used as an electrode, its storage charge density is high, and the reversible doping of the conductive polymer during the charge and discharge process makes it have a high charge storage capacity. Compared with metal oxide electrodes, conductive polymers have the advantages of cheap price and adjustable structure, but the conductive polymers are not brittle and their strength is not high, resulting in poor cycle stability of capa...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01M4/583H01M4/60
CPCY02E60/12Y02E60/13Y02E60/10
Inventor 刘立伟耿秀梅邱胜强李伟伟郭玉芬李东方陈明亮龚佑品高嵩朱超
Owner 苏州格瑞丰纳米科技有限公司
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