Preparation method of graphite spherical shell sheet

A graphite ball and graphite technology, applied in the field of materials, can solve the problems of unsatisfactory conductivity and stability of carbon materials, and achieve the effects of high capacity, excellent transmission performance, and high specific surface area

Pending Publication Date: 2020-11-17
JIANGSU HUAXIA PAINT MAKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The conductivity and stability of general carbon materials cannot meet the development needs of today's energy industry, and its structure needs to be optimized to achieve better energy storage and catalytic performance

Method used

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  • Preparation method of graphite spherical shell sheet

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Experimental program
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Effect test

Embodiment 1

[0025] Mix 2.5 g of polystyrene spheres with an average diameter of 150 nm, 2.5 g of glucose, 0.3 g of ferric nitrate and 40 mL of deionized water, ultrasonically disperse it into a uniform emulsion, and pour it into a 50 mL Teflon-lined In a high pressure reactor. Seal the autoclave, place it in an oven, heat up to 180°C, and keep it warm for 16 hours. After cooling, the solid was collected by filtration and dried at 80°C for 1 hour. The dried product was placed in a microwave oven and heated at 300-400° C. in an air atmosphere for 4 minutes. Then, the product was placed in a tube furnace, and the temperature was raised to 1000 °C at a rate of 10 °C / min under a nitrogen atmosphere and kept for 1 hour. After cooling to room temperature, use 1 mol L -1 Soak in hydrochloric acid to remove iron, then wash the sample with deionized water until neutral, and finally dry at 80 °C to obtain graphite spherical shell sheets with a thickness of 3-12 nm and a specific surface area of ​...

Embodiment 2

[0028] Mix 1 g of polystyrene spheres with an average diameter of 100 nm, 2 g of glucose, 0.2 g of potassium ferrocyanide, and 20 mL of deionized water, ultrasonically disperse it into a uniform emulsion, and pour it into a polytetrafluoroethylene liner with a volume of 50 mL. In the autoclave of vinyl fluoride. Seal the autoclave, place it in an oven, heat up to 160°C, and keep it warm for 24 hours. After cooling, the solid was collected by filtration and dried at 80°C for 1 hour. The dried product was placed in a microwave oven and heated for 3 minutes at 350-450° C. in an air atmosphere. Then, the product was placed in a tube furnace, and the temperature was raised to 1100 °C at a rate of 10 °C / min under a nitrogen atmosphere, and kept for 0.5 hours. After cooling to room temperature, use 1 mol L -1 Soak in hydrochloric acid to remove iron, then wash the sample with deionized water until neutral, and finally dry at 80 °C to obtain graphite spherical shell sheets with a t...

Embodiment 3

[0030] Mix 1 g of polystyrene spheres with an average diameter of 2 μm, 0.3 g of glucose, 0.06 g of ferric chloride, and 30 mL of deionized water, ultrasonically disperse into a uniform emulsion, and pour into a volume of 50 mL lined with polytetrafluoroethylene in the high pressure reactor. Seal the autoclave, place it in an oven, heat up to 200°C, and keep it warm for 8 hours. After cooling, the solid was collected by filtration and dried at 80°C for 1 hour. The dried product was placed in a microwave oven and heated for 30 seconds at 500-600° C. in an air atmosphere. Then, the product was placed in a tube furnace, and the temperature was raised to 600 °C at a rate of 10 °C / min under a nitrogen atmosphere and kept for 4 hours. After cooling to room temperature, use 1mol L -1 Soak in hydrochloric acid to remove iron, then wash the sample with deionized water until neutral, and finally dry at 80 °C to obtain graphite spherical shell sheets with a thickness of about 20 nm. ...

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Abstract

The invention discloses a preparation method of a graphite spherical shell sheet, and belongs to the technical field of materials. According to the method, polystyrene spheres are used as a template,glucose is used as a carbon precursor, iron (or cobalt, nickel) is used as a graphitization catalyst, the template is removed through microwave heating, a glucose layer is partially carbonized, oxidized and broken, and then high-temperature carbonization and graphitization are performed to obtain the graphite sphere shell sheet. Compared with a hollow material, the prepared graphite ball shell sheet of the invention can fully expose the internal and external specific surface areas of the hollow graphite ball so as to improve the active site concentration and the material transmission performance, and the thickness of the graphite ball shell sheet can be controlled to be about 10 layers so as to achieve the category of graphene.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of graphite spherical shell sheets. Background technique [0002] To meet the requirements of sustainable development, energy storage and catalytic materials with fast charge-discharge, long-term cycle stability, and high-efficiency catalytic performance have been extensively studied. Porous carbonaceous materials occupy a dominant position in today's energy storage and catalytic materials market due to their large specific surface area, high porosity, and stable chemical properties. The conductivity and stability of general carbon materials cannot meet the development needs of today's energy industry, and its structure needs to be optimized to achieve better energy storage and catalytic performance. Today, graphitized carbon with high specific surface area is a potential material with desirable properties, which can provide abundant active sit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205
CPCC01B32/205
Inventor 闫早学张宗尧高志宏
Owner JIANGSU HUAXIA PAINT MAKING
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