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Porous graphene-metal oxide composite material and its preparation method

A technology of porous graphene and composite materials, applied in electrical components, battery electrodes, circuits, etc., to achieve high specific capacity, prevent coalescence, and improve stability

Inactive Publication Date: 2013-06-05
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For above problem, the object of the present invention is to provide a kind of porous graphene and metal oxide composite material and preparation method thereof, this method utilizes ion exchange technology to successfully solve the problem that metal salt component exists in the diffusion aspect in graphene nanopore

Method used

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  • Porous graphene-metal oxide composite material and its preparation method
  • Porous graphene-metal oxide composite material and its preparation method
  • Porous graphene-metal oxide composite material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Using ion exchange and liquid deposition processes to convert Co 3 O 4 Loaded into the mesopores of porous graphene to obtain porous graphene and Co 3 O 4 Composite material, where Co 3 O 4 Accounting for 70% (wt%) of the total weight of the composite material, the composite material is expressed as 70% Co-porous graphene.

[0049] The porous graphene used in this example was prepared by the method described in Example 1 of CN 102115069 A. The TEM picture of the sample is as follows figure 1 Shown.

[0050] Use the method described in CN 102115069 A to prepare porous flake MgO, take 100g of porous flake MgO into a fixed bed reactor, heat it to 850°C in an Ar atmosphere, then pass in methane and react for 10 minutes. Cooled to room temperature in an argon atmosphere, the gray black powder obtained is the graphene-MgO composite obtained by the vapor chemical deposition method.

[0051] Preparation of porous graphene and Co 3 O 4 The composite material process includes two main s...

Embodiment 2

[0061] Using ion exchange and liquid deposition 2 O 3 Loaded into the mesopores of porous graphene to obtain porous graphene and Fe 2 O 3 Composite material, where Fe 2 O 3 10% (wt%) of the total weight of the composite material, the composite material is expressed as 10% Fe 2 O 3 -Porous graphene.

[0062] The same process as in Example 1 was used, except that the template agent was replaced with MgSO 4 Whiskers (prepared according to the method in the literature Crystal Research and Technology 2008; 43(5): 479-482) to prepare graphene-MgSO 4 Complex. 30g graphene-MgSO 4 Disperse the complex in excess dilute hydrochloric acid (concentrated hydrochloric acid: water = 1:3, volume ratio), stir evenly, transfer the suspension to a round bottom flask, install a condenser, boil and reflux for 1 hour and then cool to room temperature; Then vacuum filtration, disperse the obtained filter cake into deionized water, and hydrothermally treat it at 50°C for 30 minutes to remove MgCl in the p...

Embodiment 3

[0069] In this embodiment, the Co 3 O 4 Loaded into the mesopores of porous graphene (porous graphene) to obtain porous graphene and Co 3 O 4 Composite material, where Co 3 O 4 Accounting for 76% of the total weight of the composite material, the composite material is expressed as 76% Co-porous graphene.

[0070] First, the same process as in Example 1 was used to prepare the graphene-MgO composite. Disperse 30 g of graphene-MgO composite obtained by vapor chemical deposition in 800 mL of dilute hydrochloric acid (concentrated hydrochloric acid: water = 1:3, volume ratio), stir evenly, transfer the suspension to a round bottom flask, and install it Condensate tube, boil and reflux for 1 hour and then cool to room temperature; then vacuum filter, disperse the resulting filter cake in deionized water, and hydrothermally heat it at 150 degrees Celsius for 2 hours; vacuum filter again to obtain a porous graphene filter cake with water.

[0071] Add 26g Co(NO 3 ) 2 ·6H 2 O was dissolved...

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Abstract

The invention belongs to the composite material field and discloses a porous graphene-metal oxide composite material and its preparation method. The material is characterized in that porous graphene prepared through a vapor phase chemical deposition method is used as a carrier, and metal oxide particles having diameters of 0.5-100nm are filled to the nanometer pores of the porous graphene. The preparation method is characterized in that an ion exchange process is adopted to make metal salt components enter the pores of the porous graphene, and then the deposition method or the calcining method is utilized to obtain the composite structure of the porous graphene having metal oxide filled meso-pores or micro-pores. The composite material has potential application values in the lithium ion battery field, the super capacitor field, the conductive filling material field, the heterogeneous catalysis field and the like.

Description

Technical field [0001] The invention belongs to the field of nanocomposite materials, and relates to a porous graphene and metal oxide composite material and a preparation method thereof. The composite material has potential application value in electrode materials, conductive filling materials, catalytic reactions and the like. Background technique [0002] Graphene, as a new two-dimensional structure of carbon material, was first discovered by Novoselov et al. in 2004 (Novoselov, KS; Geim, AK; Morozov, SV; Jiang, D.; Zhang, Y.; Dubonos, SV) ; Grigorieva, IV; Firsov, AAScience 2004, 306, 666-9). Its special structure makes it have many special properties. Such as high theoretical specific surface area, outstanding thermal conductivity, excellent mechanical properties and super high strength. The electron mobility of graphene at room temperature far exceeds the conduction rate of electrons in general conductors, so the potential application space in the field of microelectronic...

Claims

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Application Information

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IPC IPC(8): H01M4/48
CPCY02E60/12Y02E60/10
Inventor 宁国庆朱晓高金森
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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