Method for preparing pitch-based hollow carbon spheres

A pitch-based, carbon ball technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as difficulty in large-scale production, and achieve the effects of simple preparation, large output and good repeatability

Inactive Publication Date: 2015-08-05
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only used for laboratory preparation and is difficult to produce on a large scale

Method used

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  • Method for preparing pitch-based hollow carbon spheres
  • Method for preparing pitch-based hollow carbon spheres

Examples

Experimental program
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Embodiment 1

[0021] 1. Preparation of silica balls

[0022] At 25 o At C, mix 100 ml of absolute ethanol, 6 ml of concentrated ammonia (25%) and 2 ml of deionized water, add 3 ml of ethyl orthosilicate under stirring, stir at room temperature for 6 hours, then centrifuge, Washing in the oven 90 o C Dry for use.

[0023] 2. Preparation of core-shell silica spheres

[0024] Disperse the above 200 mg silica spheres in 60 ml deionized water, sonicate it for 1 h, and wait until it is completely dispersed to obtain a white emulsion, add 200 mg cetyltrimethylammonium bromide to it, stir for 30 min, and then Add 25 ml of absolute ethanol and 0.9 ml of concentrated ammonia and stir for 10 min, and finally add 0.6 ml of ethyl orthosilicate and stir for 6 h. The white emulsion is filtered, washed, and dried at 90 °C for use.

[0025] 3. Preparation of hollow carbon balls

[0026] The hollow carbon spheres were prepared by vapor deposition method. Two corundum porcelain boats containing 10 g pitch and 1 g te...

Embodiment 2

[0028] The difference between Example 2 and Example 1 is that when preparing silica spheres with a core-shell structure, the amount of cetyltrimethylammonium bromide added has been increased from 200 mg to 400 mg. The amount of ethyl acid added was increased from 0.6 ml to 1.5 ml, and the other preparation process was the same as in Example 1. figure 2 The TEM image of hollow carbon spheres prepared in Example 2. From figure 2 It can be seen that by changing the addition amount of cetyltrimethylammonium bromide and ethyl orthosilicate, the wall thickness of the obtained hollow carbon spheres changed from 50 nm in Example 1 to 110 nm.

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Abstract

The invention provides a method for preparing pitch-based hollow carbon spheres. The preparation method mainly comprises the following steps: 1) preparing nano silicon dioxide spheres; 2) modifying the nano silicon dioxide spheres by use of hexadecyl trimethyl ammonium bromide and tetraethoxysilane; 3) taking petroleum pitch as a carbon source, preparing the hollow carbon spheres by use of a vapor deposition method. The carbon source used in the method is rich in source and low in price; the method is simple in preparation equipment, controllable in conditions and suitable for large-scale production; the obtained hollow carbon spheres are uniform in size, good in dispersity, controllable in diameter and wall thickness, and applicable to the fields of energy source materials, biocarriers and the like.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, and in particular relates to a method for preparing hollow carbon spheres by using pitch as a carbon source. Background technique [0002] As one of the new carbon nanomaterials, hollow carbon spheres are widely used in lithium-ion batteries because of their unique shell structure, excellent electrical conductivity, good thermal stability, low density, and large cavity volume. , fuel cells, adsorption, catalytic carriers, biology and other fields. Hollow carbon spheres can usually be prepared by hard template method and soft template method. The template method is mainly to coat the carbon source on the surface of the template and carry out high-temperature carbonization, and then remove the template to obtain hollow carbon spheres. However, the current preparation process of hollow carbon spheres is relatively complicated, mainly using relatively expensive reagents such as glucose, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01M4/583
CPCY02E60/10
Inventor 王鲁香马庆涛贾殿赠
Owner XINJIANG UNIVERSITY
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