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Batch production method of high quality graphene

A production method and graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of difficult access of solvent molecules and large volume of organic molecules, etc., with short time to achieve, complete crystal structure, and good quality Effect

Inactive Publication Date: 2018-07-24
山东恒华新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene prepared by thermal expansion of natural graphite has the characteristics of small graphite layer spacing and large organic molecule volume, which makes it difficult for intercalated solvent molecules to enter the graphite layer or only a small amount enters the graphite layer. After thermal expansion, it is difficult to obtain less than 10 layers and a specific surface area of ​​300㎡ / g or more graphene products

Method used

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  • Batch production method of high quality graphene
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Experimental program
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Effect test

Embodiment 1

[0024] A batch production method of high-quality graphene, comprising the following steps:

[0025] Step 1: Add 100-mesh natural graphite powder with a purity of more than 99.8% into a reactor filled with ammonia;

[0026] Step 2: Add metal sodium and liquid ammonia to the reaction kettle in step 1 in sequence to obtain a mixed liquid, wherein the weight ratio of sodium to liquid ammonia is 0.18, maintain the temperature at 25°C for 1 hour, and control the pressure at 1.1Mpa;

[0027] Step 3: heating the reaction kettle in step 2 until the liquid ammonia evaporates to obtain sodium-intercalated graphite powder, wherein the liquid ammonia evaporates and enters the gas recovery system;

[0028] Step 4: Put the sodium intercalated graphite powder into the stripper and add water to react;

[0029] Step 5: washing, filtering and drying the material obtained in step 4 to obtain a graphene product.

[0030] In order to obtain graphene with different layers, the steps 1-5 can be car...

Embodiment 2

[0032] A batch production method of high-quality graphene, comprising the following steps:

[0033] Step 1: Add 100-mesh natural graphite powder with a purity of more than 99.8% into a reactor filled with ammonia;

[0034] Step 2: Add metal sodium and liquid ammonia to the reaction kettle in step 1 in sequence to obtain a mixed liquid, wherein the weight ratio of sodium to liquid ammonia is 0.22, maintain the temperature at 31°C for 2 hours, and control the pressure at 1.2Mpa;

[0035] Step 3: heating the reaction kettle in step 2 until the liquid ammonia evaporates to obtain sodium-intercalated graphite powder, wherein the liquid ammonia evaporates and enters the gas recovery system;

[0036] Step 4: Put the sodium intercalated graphite powder into the stripper and add water to react;

[0037] Step 5: washing, filtering and drying the material obtained in step 4 to obtain a graphene product.

[0038] In order to obtain graphene with different layers, the steps 1-5 can be ca...

Embodiment 3

[0040] A batch production method of high-quality graphene, comprising the following steps:

[0041] Step 1: Add 200-mesh natural graphite powder with a purity of more than 99.8% into a reactor filled with ammonia;

[0042] Step 2: Add metal sodium and liquid ammonia to the reaction kettle in step 1 in sequence to obtain a mixed liquid, wherein the weight ratio of sodium to liquid ammonia is 0.24, maintain the temperature at 33°C for 1 hour, and control the pressure at 1.3Mpa;

[0043] Step 3: heating the reaction kettle in step 2 until the liquid ammonia evaporates to obtain sodium-intercalated graphite powder, wherein the liquid ammonia evaporates and enters the gas recovery system;

[0044] Step 4: Put the sodium intercalated graphite powder into the stripper and add water to react;

[0045] Step 5: washing, filtering and drying the material obtained in step 4 to obtain a graphene product.

[0046] In order to obtain graphene with different layers, the steps 1-5 can be car...

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Abstract

The invention discloses a batch production method of high quality graphene, and belongs to the technical field of graphene production. The method comprises the following steps: 1, adding natural graphite powder to a reactor fully filled with ammonia gas; 2, sequentially adding sodium metal and liquid ammonia to the reactor of the step 1 to obtain a mixed liquid, maintaining at normal temperature for 1 to 2 hours, and controlling pressure to 1.0 to 1.5 MPa; 3, heating the reactor of the step 2 until the liquid ammonia is evaporated completely to obtain sodium-intercalated graphite powder; step4, placing the sodium intercalated graphite powder into a stripper, and introducing water for reaction; and step 5, washing a material obtained in the step 4 with water, filtering and drying to obtaina graphene product. The method has the advantages of using of the natural graphite powder as a raw material, no changing in the graphene structure, short graphene forming time, mass production and the like.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to a batch production method of high-quality graphene. Background technique [0002] Since the advent of graphene in 2004, it has received extensive scientific attention due to its excellent electrical properties. The unique physical and mechanical properties of graphene further broaden its application space, the thermal conductivity is as high as 5300W / MK, and the theoretical specific surface area is as high as 2630m 2 / G, almost completely transparent, only absorbs 2.3% of light. Graphene will become the core material of various next-generation electronic devices such as high-speed transistors, high-sensitivity sensors, lasers, touch panels, batteries and high-efficiency solar cells. The good mechanical properties of graphene have been applied to heat-shrinkable materials or film materials to improve tensile strength. The extremely high theoretical surface area of ​​...

Claims

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B2204/04C01B2204/32
Inventor 孙蕾马玉晓李东田梁士明
Owner 山东恒华新材料有限公司
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