Device and method for one-step mass production of graphene by electrochemical process

Abstract

The invention discloses a device and a method for one-step mass production of graphene by an electrochemical process. The device comprises an electrochemical intercalation slot and an electrochemicalstripping slot in sequence, wherein the electrochemical intercalation slot and the electrochemical stripping slot are filled with inorganic salt electrolyte; the positive electrodes of the electrochemical intercalation slot and the electrochemical stripping slot are metal bars; the negative electrode of the electrochemical intercalation slot is flexible graphene paper; the intercalated flexible graphene paper in the electrochemical intercalation slot is taken as the negative electrode of the electrochemical stripping slot; the electrochemical intercalation slot and the electrochemical stripping slot are connected with direct-current power supply equipment of 1.5V to 3V and direct-current power equipment of 8V to 11V respectively. Intercalation is performed in the electrochemical intercalation slot for a certain time to obtain strippable flexible graphene, then the strippable flexible graphene is introduced into the electrochemical stripping slot, and the intercalated flexible grapheneis stripped immediately at the moment when the intercalated flexible graphene enters the electrolyte, so that the flexible graphene is stripped into fewer-layer graphene. The graphene is produced in an electrochemical way, so that the device and the method have the advantages of great reduction in the environment pollution load, short time, low energy consumption, time saving and safety; an environment-friendly, safe and efficient process method and device for mass production of the graphene are realized.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to an environmentally friendly, safe and efficient mass production method and device for graphene. Background technique [0002] Graphene has a perfect two-dimensional crystal structure, and its lattice is a hexagon surrounded by six carbon atoms, with a thickness of one atomic layer. The carbon atoms are connected by σ bonds, and the bonding method is sp2 hybridization. These σ bonds endow graphene with extremely excellent mechanical properties and structural rigidity. Graphene is 100 times stronger than the best steel and even stronger than diamond. In graphene, each carbon atom has an unbonded p-electron. These p-electrons can move freely in the crystal, and the movement speed is as high as 1 / 300 of the speed of light, which endows graphene with good conductivity. Graphene is a new generation of transparent conductive materials. In the visible light region, the transmittance...

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Problems solved by technology

[0008] 2. The chemical oxidation method requires the use of a strong oxidant and an intercalation agent (KMnO 4 、H 2 SO 4 ), heavy metals, strong acids, etc., will cause serious environmental pressure. For every 1T of product produced, 10T of backwash wastewater will be generated

[0010] Therefore, the existing methods still have the disadvantages of low efficiency, large pollution, long time consumption and high risk factor.

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