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Electrochemical preparation method of porous graphene dispersion liquid

A technology of porous graphene and dispersion liquid, applied in chemical instruments and methods, graphene, inorganic chemistry, etc., can solve the problems of complex operation process, high equipment requirements, long time consumption, etc., and achieves low preparation cost, low equipment requirements, good controllability

Active Publication Date: 2021-01-19
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of electrochemical preparation method of porous graphene dispersion liquid, in order to overcome the time-consuming long that the preparation method of porous graphene exists in the prior art, yield is low, equipment requirement is higher, operation process is complicated and other technical issues

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  • Electrochemical preparation method of porous graphene dispersion liquid
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  • Electrochemical preparation method of porous graphene dispersion liquid

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preparation example Construction

[0043] The present invention provides a kind of electrochemical preparation method of porous graphene dispersion liquid, refer to figure 1 , including the following steps:

[0044] S1, preparation of electrolyte;

[0045] S2. Using graphite material as a raw material, pretreating the graphite material with microwaves;

[0046] S3. Using the graphite material after microwave pretreatment as an anode, using a metal electrode or a graphite electrode as a cathode, electrolytically stripping the graphite material in the electrolyte to obtain exfoliation;

[0047] S4, collecting the exfoliation, washing and drying to obtain a graphite intercalation compound;

[0048] S5. Add the graphite intercalation compound into the dispersion medium solvent, and perform ultrasonic treatment to obtain a porous graphene dispersion.

[0049] The principle of the electrochemical preparation method of porous graphene dispersion liquid of the present invention is: because microwave pretreatment for...

Embodiment 1

[0053] The present embodiment provides a kind of electrochemical preparation method of porous graphene dispersion liquid, comprises the following steps:

[0054] S1, prepare 0.1mol / L ammonium sulfate+0.5mol ammonia aqueous solution as electrolyte;

[0055] S2. Using an electrode formed of natural graphite as a raw material, pretreat the graphite electrode with microwave, the microwave power is 3000W, and the microwave time is 5min;

[0056] S3. Use the pretreated graphite electrode as the anode, and the metal platinum electrode as the cathode. Place the two electrodes vertically with a parallel distance of 2 cm. Control the temperature of the electrolyte in the constant temperature electrolytic cell to 35°C, and use a constant current of 0.5A to electrolytically peel off the graphite. electrodes, get exfoliation;

[0057] S4, collecting the exfoliation in step S3, washing and drying the exfoliation, drying and dehydrating in a constant temperature drying oven to obtain a grap...

Embodiment 2

[0061] The present embodiment provides a kind of electrochemical preparation method of porous graphene dispersion liquid, comprises the following steps:

[0062] S1, prepare 0.1mol / L ammonium sulfate aqueous solution as electrolyte;

[0063] S2. Using the electrode formed by synthetic graphite as raw material, pretreat the graphite electrode with microwave, the microwave power is 500W, and the microwave time is 10min;

[0064] S3. Use the pretreated graphite electrode as the anode, and the metal gold electrode as the cathode. The two electrodes are placed vertically with a parallel distance of 2 cm. The temperature of the electrolyte is controlled at 35°C in a constant temperature electrolytic cell, and a constant current of 0.5A is used for electrolytic stripping. Graphite electrode, get exfoliation;

[0065] S4, collecting the exfoliation in step S4, washing and drying the exfoliation, drying and dehydrating in a constant temperature drying oven to obtain a graphite interca...

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Abstract

The invention discloses an electrochemical preparation method of a porous graphene dispersion liquid. The electrochemical preparation method comprises the following steps: preparing an electrolyte; performing microwave pretreatment on a graphite material serving as a raw material; taking the graphite material subjected to microwave pretreatment as an anode, taking a metal electrode or a graphite electrode as a cathode, and electrolytically stripping the graphite material in the electrolyte to obtain a stripped material; collecting the stripped material, and washing and drying the stripped material to obtain a graphite intercalation compound; and adding the graphite intercalation compound into a dispersion medium solvent, and carrying out ultrasonic treatment to obtain the porous graphene dispersion liquid. Compared with the prior art, the porous graphene can be prepared through one-step electrochemical reaction, and the preparation method is simple, efficient, mild in condition, low inequipment requirement, free of environmental pollution, low in cost and beneficial to industrial production.

Description

technical field [0001] The invention relates to the technical field of porous graphene materials, in particular to an electrochemical preparation method of a porous graphene dispersion. Background technique [0002] Graphene is a two-dimensional structure of carbon materials, because of the honeycomb structure formed by the arrangement of carbon atoms, it has many excellent properties, such as high electrical conductivity, excellent mechanical properties and large specific surface area. However, due to the strong van der Waals interaction between layers, graphene sheets tend to restack or aggregate, which may hinder the penetration of electrolytes and reduce the rate of ion diffusion. Graphene with a porous structure has high conductivity due to the opening of ion channels through nanopores on the surface, which greatly improves the ion diffusion rate. Porous graphene not only retains the excellent properties of graphene, but compared with the inert graphene surface, the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
CPCC01B32/19C01B2204/32Y02E60/50
Inventor 丁古巧段璞何朋谢晓明
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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