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Graphene composite porous carbon as well as preparation method and application thereof

A graphene composite and graphene technology, applied in carbon preparation/purification, chemical instruments and methods, hybrid/electric double-layer capacitor manufacturing, etc., can solve difficult-to-control material specific surface area, wide pore size distribution, complex pore structure, etc. problems, achieve uniform pore size, reduce dosage, and improve conductivity

Inactive Publication Date: 2018-11-23
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The first object of the present invention is to provide a preparation method of graphene composite porous carbon, aiming at the shortcomings of the material prepared by the traditional activation method such as wide pore size distribution, complex pore structure and difficult to control, and the low specific surface area of ​​the material prepared by the simple template method, Porous carbon materials with high specific surface area and micropore-medium pore hierarchical distribution are prepared through template-activation synergy, greatly reducing the amount of alkaline substances, mild reaction conditions, and greatly improving the conductivity of porous carbon materials by introducing graphene

Method used

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  • Graphene composite porous carbon as well as preparation method and application thereof
  • Graphene composite porous carbon as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Take 20g Mg(NO 3 ) 2 Dissolve in 100g of absolute ethanol, then add 100g of phenolic resin and stir evenly to obtain a homogeneous solution of phenolic resin.

[0066] Graphene oxide (referred to as GO) was ultrasonically dispersed in distilled water to prepare a 0.5 wt% graphene oxide solution. Prepare a PVA aqueous solution with a concentration of 10wt%, and mix a certain amount of graphene oxide solution with the PVA solution, and obtain a uniformly mixed GO / PVA mixed solution after high-speed stirring (1000r / min), wherein the mass ratio of GO to PVA for 1:20.

[0067] The GO / PVA solution was added into the above homogeneous phenolic resin solution under high-speed stirring (1000r / min) and mixed uniformly so that GO accounted for 0.25% of the phenolic resin.

[0068] The above solution was solidified at 150°C for 6 hours and then pulverized. The pulverized material was placed in a tube furnace and raised to 550°C at a heating rate of 5°C / min, and kept at a constan...

Embodiment 2

[0071] With respect to embodiment 1, only change Mg(NO 3 ) 2 The addition amount of is 30g, all the other conditions are exactly the same.

Embodiment 3

[0073] With respect to embodiment 1, only change Mg(NO 3 ) 2 The addition amount of is 40g, and all the other conditions are exactly the same.

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Abstract

The invention relates to the field of electrode materials, in particular to graphene composite porous carbon as well as a preparation method and application thereof. The preparation method of the graphene composite porous carbon comprises the following steps of mixing phenolic resin, template agents and modified graphene to prepare a mixed solution; performing curing and crushing on the mixed solution to obtain carbon precursors; performing carbonization on the carbon precursors to obtain carbonized materials; mixing the carbonized materials with alkaline substances for activation; performingacid treatment on the obtained activation products; then flushing the products into a neutral state; performing drying to obtain the graphene composite porous carbon. The method has the advantages that the activation method is introduced on the basis of a template method; the activation method and the template method achieve the cooperated effects to prepare the micropore-medium pore multi-stage pore passage distribution porous carbon material; the reaction process is mild; graphene is introduced, so that the material conductivity can be greatly improved; the power characteristics of the porous carbon materials as an electrode material can be improved; the material has wide prospects when being used as supercapacitors.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a graphene composite porous carbon and its preparation method and application. Background technique [0002] Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage device with high power density, fast charge and discharge speed, and long cycle life. As the core of supercapacitors, electrode materials determine the overall performance of supercapacitors. Carbon materials, metal oxides, and conducting polymers are the most common electrode materials. Among them, carbon materials are widely used as electrode materials for supercapacitors due to their low cost, large specific surface area, controllable pore structure, high electrical conductivity, good physical and chemical stability, and simple preparation process. Among many carbon materials, porous carbon is widely used because of its mature preparation process and easy industrial production. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/00C01B32/05C01B32/194H01G11/86H01G11/44H01G11/24
CPCC01P2004/80C01P2006/12C01P2006/40H01G11/24H01G11/44H01G11/86Y02E60/13
Inventor 盛杰张金柱张安任方华孟德炎
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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