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Method for preparing graphene from raw graphite ores through electrolysis

A graphene and electrolysis technology, applied in electrolysis process, electrolysis components, etc., can solve undiscovered problems and achieve high-efficiency preparation, high yield, and high purity

Active Publication Date: 2015-01-07
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching, no patents, papers and reports were found on the direct preparation of graphene from microcrystalline graphite raw ore

Method used

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  • Method for preparing graphene from raw graphite ores through electrolysis
  • Method for preparing graphene from raw graphite ores through electrolysis
  • Method for preparing graphene from raw graphite ores through electrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0089] (1) 50.0g diameter is the agate ball milling ball of 1-1.3cm, 1.0g microcrystalline graphite ore and 80ml dispersant are sealed in the agate ball mill jar under argon protection, then the ball mill jar is placed on the planetary ball mill and Ball mill at 580rpm for 2 hours. Remove the agate ball with tweezers. Dispersant is 70wt% HClO 4 Aqueous solution, the ratio of dispersant and microcrystalline graphite raw ore raw material is 80ml / g. The average particle size of microcrystalline graphite raw ore after ball milling is 30 μm. (2) Put the raw ore powder of microcrystalline graphite directly into polyethylene bags after ball milling to make anodes and cathodes. The distance between the anode and cathode was 5 mm, and the average pore size of the polyethylene bag was 0.2 μm. (3) Apply a DC voltage of +5V to -5V between the anode and the cathode, electrolyze for 120 hours, exchange the electrodes every 10 hours, and control the electrolysis temperature at 25°C. The...

Embodiment 2

[0091] (1) 50.0g diameter is the agate ball milling ball of 1-1.3cm, 1.0g microcrystalline graphite raw ore and 80ml dispersant are sealed in the agate ball mill jar under argon protection, then the ball mill jar is placed on the planetary ball mill and Ball mill at 580rpm for 2 hours. Remove the agate ball with tweezers. The dispersant is 10wt% H 2 SO 4 Aqueous solution, the ratio of dispersant and microcrystalline graphite raw ore raw material is 80ml / g. The average particle size of microcrystalline graphite raw ore after ball milling is 30 μm. (2) Put the raw ore powder of microcrystalline graphite directly into polyethylene bags after ball milling to make anodes and cathodes. The distance between the anode and cathode was 5 mm, and the average pore size of the polyethylene bag was 0.2 μm. (3) Apply a DC voltage of +8V to -8V between the anode and the cathode, electrolyze for 60 hours, exchange the electrodes every 3 hours, and control the electrolysis temperature at 4...

Embodiment 3

[0093] (1) 50.0g diameter is the agate ball milling ball of 1-1.3cm, 1.0g microcrystalline graphite raw ore and 80ml dispersant are sealed in the agate ball mill jar under argon protection, then the ball mill jar is placed on the planetary ball mill and Ball mill at 580rpm for 2 hours. Remove the agate ball with tweezers. Dispersant is 35wt% HNO 3 Aqueous solution, the ratio of dispersant and microcrystalline graphite raw ore raw material is 80ml / g. The average particle size of microcrystalline graphite raw ore after ball milling is 30 μm. (2) Put the raw ore powder of microcrystalline graphite directly into polyethylene bags after ball milling to make anodes and cathodes. The distance between the anode and cathode was 5 mm, and the average pore size of the polyethylene bag was 0.2 μm. (3) Apply a DC voltage of +10V to -10V between the anode and the cathode, electrolyze for 4 hours, exchange the electrodes every 30 minutes, and control the electrolysis temperature at 60°C....

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Abstract

The invention discloses a method for preparing graphene from raw graphite ores through electrolysis. The method comprises the steps of crushing raw microcrystal graphite ores, sieving, and recycling raw materials which are not insufficiently crushed; preparing an electrode from raw microcrystal graphite ore powder or insufficiently-delaminated raw ores; electrolyzing the prepared electrode in an electrolytic tank, carrying out solid-liquid separation, and further delaminating a solid obtained by separation to obtain the insufficiently-delaminated raw ores and coarsely-prepared graphene; and separating and extracting graphene from the coarsely-prepared graphene. The method has the advantages of low cost, simple preparation process and device, simplicity in operation, good product quality, high process safety and large-scale production.

Description

technical field [0001] The invention relates to a method for preparing graphene, in particular to a method for directly preparing graphene by electrolysis of graphite raw ore. Background technique [0002] Since Geim, a professor of physics at the University of Manchester in the United Kingdom, prepared and observed single-layer graphene crystals by micromechanical exfoliation in 2004, this new type of carbon material has become a research hotspot in the fields of materials science, physics and chemistry. In addition, graphene has potential application value in many fields such as lithium-ion batteries, supercapacitors, electrochemical catalysis, sensors, polymer composites, storage materials, and photoelectric conversion. [0003] The method of preparing high-quality graphene at low cost on a large scale is one of the keys to the research and application of graphene. In recent years, many scholars have devoted themselves to exploring the preparation methods of single-layer...

Claims

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Application Information

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IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 王俊中王俊英郭全贵闫蕊黄建林
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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