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Porous graphene-metal oxide composite material and its preparation method

A technology of porous graphene and composite materials, applied in the direction of electrical components, battery electrodes, circuits, etc., to achieve the effects of improved stability, good cycle stability, and high specific capacity

Inactive Publication Date: 2014-12-10
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] Co 3 o 4 loaded into the mesopores of porous graphene to obtain porous graphene and Co 3 o 4 Composite materials, 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 is prepared by the method described in CN 102115069 A Example 1, and the transmission electron microscope picture of the sample is as follows figure 1 shown.

[0050] Adopt the method described in CN 102115069 A Example 1 to prepare porous sheet-like MgO, take 100g of porous sheet-like MgO and put it into a fixed-bed reactor, heat it to 850°C under Ar atmosphere, then feed methane, react for 10 minutes, and finally Cool to room temperature under an argon atmosphere, and the obtained gray-black powder is the graphene-MgO composite obtained by vapor phase chemical deposition.

[0051] Preparation of porous graphene and Co 3 o 4 The composite process inclu...

Embodiment 2

[0061] Fe was deposited by ion exchange and liquid phase 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 Accounting for 10% (wt%) of the total weight of the composite material, the composite material is expressed as 10% Fe 2 o 3 - porous graphene.

[0062] Adopt the same process as embodiment 1, just change template agent into MgSO 4 Whiskers (prepared according to the method in the literature Crystal Research and Technology 2008; 43 (5): 479-482), thereby preparing graphene-MgSO 4 Complex. 30g graphene-MgSO 4 The compound was dispersed in excess dilute hydrochloric acid (concentrated hydrochloric acid: water = 1:3, volume ratio), after stirring evenly, the suspension was transferred to a round-bottomed flask, installed with a condenser, boiled and refluxed for 1 hour, then cooled to room temperature; Then vacuum filtration, the obtained filter cake was dispersed in deionized wate...

Embodiment 3

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

[0070] First, the graphene-MgO composite was prepared using the same procedure as in Embodiment 1. Disperse 30g of graphene-MgO composites obtained by vapor phase chemical deposition in 800mL of dilute hydrochloric acid (concentrated hydrochloric acid: water=1:3, volume ratio), transfer the suspension to a round-bottomed flask after stirring evenly, and install Condenser, boiled and refluxed for 1 hour, then cooled to room temperature; then vacuum filtered, and the resulting filter cake was dispersed in deionized water, and hydrothermally treated at 150 degrees Celsius for 2 hours; vacuum filtered again to obtain a water-containing porous graphene filter cake.

[0071] 26g Co(NO 3 ) 2 ·6H ...

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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 carbon material, was first discovered by Novoselov et al. in 2004 (Novoselov, K.S.; Geim, A.K.; Morozov, S.V.; Jiang, D.; Zhang, Y.; Dubonos, S.V. ; Grigorieva, I.V.; Firsov, A.A. Science 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 ultra-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 microelectr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48
CPCY02E60/10
Inventor 宁国庆朱晓高金森
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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