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A method for electrochemically preparing graphene

A graphene and electrochemical technology, applied in the field of electrochemical preparation of graphene, can solve the problems of unseen graphene, etc., achieve the effect of low raw material cost, avoid oxidation, and improve quality

Active Publication Date: 2022-03-04
SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is no report on the preparation of graphene by asymmetric alternating current electrolysis

Method used

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  • A method for electrochemically preparing graphene
  • A method for electrochemically preparing graphene
  • A method for electrochemically preparing graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A kind of preparation method of graphene is characterized in that, the method comprises the following steps:

[0055] (1) Preparation of reactants: graphite powder is pressed into graphite flakes by tableting equipment, and the thickness of the tablet is 3mm thick electrode M and electrode N; select tetrabutylammonium bisulfate (TBAHSO 4 ), be made into the solution B of 0.5mol / L; According to 3% volume ratio in B solution, promptly every 100mL B solution adds the ammoniacal liquor of 30% mass fraction of 3mL, the pH value of regulating and controlling B solution is 9, and mixed solution Stir at a constant speed for 15 minutes; and sonicate at room temperature for 5 minutes at a power of 50W to obtain electrolyte solution C;

[0056] (2) Reaction stripping: place the electrolyte device in a constant temperature environment of 0°C, use the graphite sheet described in step (1) as the electrode, and solution B as the electrolyte, and keep it stable for 2 hours under a DC v...

Embodiment 2

[0061] A kind of preparation method of graphene is characterized in that, the method comprises the following steps:

[0062] (1) Preparation of reactants: graphite powder is pressed into graphite flakes by tableting equipment, and the thickness of the tablet is 3mm thick electrode M and electrode N; select tetrabutylammonium bisulfate (TBAHSO 4 ), be made into the solution B of 0.5mol / L; According to 3% volume ratio in B solution, promptly every 100mL B solution adds the ammoniacal liquor of 30% mass fraction of 3mL, the pH value of regulating and controlling B solution is 9, and mixed solution Stir at a constant speed for 15 minutes; and sonicate at room temperature for 5 minutes at a power of 50W to obtain electrolyte solution C;

[0063] (2) Reaction stripping: place the electrolyte device in a constant temperature environment of 0°C, use the graphite sheet described in step (1) as the electrode, and solution B as the electrolyte, and keep it stable for 2 hours under a DC v...

Embodiment 3

[0069] A kind of preparation method of graphene is characterized in that, the method comprises the following steps:

[0070] (1) Preparation of reactants: graphite powder is pressed into graphite flakes by tableting equipment, and the thickness of the tablet is 3mm thick electrode M and electrode N; select tetrabutylammonium bisulfate (TBAHSO 4 ), be made into the solution B of 0.5mol / L; According to 3% volume ratio in B solution, promptly every 100mL B solution adds the ammoniacal liquor of 30% mass fraction of 3mL, the pH value of regulating and controlling B solution is 9, and mixed solution Stir at a constant speed for 15 minutes; and sonicate at room temperature for 5 minutes at a power of 50W to obtain electrolyte solution C;

[0071] (2) Reaction stripping: place the electrolyte device in a constant temperature environment of 0°C, use the graphite sheet described in step (1) as the electrode, and solution B as the electrolyte, and keep it stable for 2 hours under a DC v...

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Abstract

The invention belongs to the technical field of inorganic material preparation, and in particular relates to a method for preparing graphene. The method comprises the following steps: preparing a graphite material into an electrode; preparing an ammonium salt into an electrolyte; Pretreatment, followed by adding ammonia water to conduct electrolytic exfoliation of the graphite cathode at a certain temperature; then solid-liquid separation and drying of the electrolyzed product to obtain graphene of different qualities; by precisely controlling the parameters of the alternating current, both graphene The intercalation exfoliation of ZnO can effectively avoid the oxidation of graphene during the intercalation process; at the same time, the problem of low intercalation efficiency due to the contribution of electrode capacitance to the general alternating current during intercalation has also been solved. In the present invention, conventional chemical raw materials are used to prepare graphene, the raw material cost is low and easy to obtain, and the industrialization is convenient.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and in particular relates to a method for electrochemically preparing graphene. Background technique [0002] The low-cost and large-scale preparation of graphene is a key technical problem that must be solved to take advantage of the excellent electrical and thermal conductivity of graphene and promote the application of graphene in the fields of electrothermal, sensing and energy storage. The most important technical route to prepare graphene is to use cheap graphite as raw material through intercalation and exfoliation of graphite layers. For this technical route, high quality is the prerequisite for its application in all aspects, and at the same time, the environmental protection and safety of the preparation system and process should also be taken into account. However, it is still a challenge to develop high-quality, high-yield, and environmentally friendly prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
CPCC01B32/19C01B2204/04C01B2204/32C01B2204/20
Inventor 陈杰申保金汤凤林朱叶峰杨修光张玲骆艳华裴晓东
Owner SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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