Hollow carbon sphere and preparation method thereof

A technology for hollow spheres and silica spheres, which is applied to the field of carbon hollow spheres and their preparation, can solve the problems of poor control of product structure and morphology, complicated processes, and difficulty in industrialized production, and achieves easy industrialized production and simple preparation process. Effect

Active Publication Date: 2011-04-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the chemical preparation of carbon hollow spheres is mainly carried out by the template method and the template-free method. The template method mainly uses a core-shell structure composite sphere with a carbonizable shell. structure, such methods usually require expensive template spheres, the

Method used

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  • Hollow carbon sphere and preparation method thereof
  • Hollow carbon sphere and preparation method thereof
  • Hollow carbon sphere and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0029] Example 1. Preparation of carbon hollow spheres

[0030] (1) Preparation of silica balls

[0031] Prepare the ethanol solution of ethyl orthosilicate (the volume ratio of ethyl orthosilicate to ethanol is 1:4) at 25°C and the ethanol solution of 30 mL and ammonia (the volume ratio of ammonia and ethanol is 1:4) 60mL (in this system, the volume ratio of ethyl orthosilicate, ammonia water and ethanol is 1:2:12), under vigorous stirring (stirring rate 1000r / min), 2mL of ethyl orthosilicate prepared above The ethanol solution was added to the ethanol solution of ammonia water prepared above, and stirred vigorously (stirring rate 1000r / min) for 10 minutes, and then at a lower speed (stirring rate 800r / min) the remaining ethyl orthosilicate prepared above The ethanol solution was added to the above-prepared ethanol solution of ammonia water, and stirring was maintained (agitating rate 800r / min) for 4h. After the reaction, the powder was collected by centrifugal water washing 3 t...

Example Embodiment

[0038] Example 2. Preparation of carbon hollow spheres

[0039] (1) Preparation of silica balls

[0040] Prepare the propanol solution of ethyl orthosilicate (the volume ratio of ethyl orthosilicate and propanol is 1:5) at 30℃ and the propanol solution of 30 mL and ammonia (the volume ratio of ammonia water and propanol is 1:4) 90mL (in this system, the volume ratio of ethyl orthosilicate, ammonia and propanol is 1:3.6:19.4), under vigorous stirring (stirring rate 1000r / min), 5mL of the above-prepared normal The propanol solution of ethyl silicate was added to the propanol solution of ammonia water prepared above, and stirred vigorously (stirring rate 1500r / min) for 20 minutes, and then at a lower speed (stirring rate 600r / min). The remaining propanol solution of ethyl orthosilicate was added to the above-prepared ammonia solution in propanol, and stirring was maintained (stirring rate 600r / min) for 6h. Afterwards, the powder was collected by centrifugal washing 5 times and dryin...

Example Embodiment

[0052] Example 3. Preparation of carbon hollow spheres

[0053] (1) Preparation of silica balls

[0054] Prepare the n-butanol solution of ethyl orthosilicate (the volume ratio of ethyl orthosilicate and n-butanol is 1:1) at 30℃ and the n-butanol solution of 40mL and ammonia (volume of ammonia and n-butanol) The parts ratio is 1:2) 60mL (in this system, the volume ratio of ethyl orthosilicate, ammonia water and n-butanol is 1:1:3), under vigorous stirring (stirring rate 1000r / min), 1mL The n-butanol solution of ethyl orthosilicate prepared above was added to the n-butanol solution of ammonia water prepared above, and stirred vigorously (stirring rate 1200r / min) for 10 minutes, and then at a lower speed (stirring rate 600r / min) Add the remaining n-butanol solution of ethyl orthosilicate prepared above into the n-butanol solution of ammonia water prepared above, and maintain stirring (stirring rate 1000r / min) for 12h. After the reaction, the powder was collected by centrifugation (...

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Abstract

The invention provides a hollow carbon sphere and a preparation method thereof. The preparation method comprises the following steps: 1) styrene compounds are subject to polymerization reaction in silica sphere dispersion in which an initiator and a stabilizer are dissolved to obtain silica spheres coated by a polystyrene layer; 2) the silica spheres coated by the polystyrene layer are subject tosulfonation reaction to obtain silica spheres coated by a sulfonated polystyrene layer; 3) the silica spheres coated by the sulfonated polystyrene layer are sintered to obtain silica spheres coated by a carbon layer; and 4) the silica spheres coated by the carbon layer react with alkali or acid, thus obtaining the hollow carbon spheres. The preparation method provided by the invention has the advantages that the used template spheres are cheap and can be obtained easily, the preparation process is simple, and industrial production can be realized easily.

Description

technical field [0001] The invention relates to a carbon hollow sphere and a preparation method thereof, belonging to the field of preparation of nanometer hollow sphere materials. Background technique [0002] Carbon hollow spheres are a class of functional materials with special structures, which are widely used in energy, catalysis, medical and other fields. In recent years, with the deepening of research on lithium-ion batteries in portable electronic products, electric vehicles and plug-in hybrid electric vehicles, it has been found that carbon hollow spheres can not only be used as conductive carriers for various battery active materials, but also directly as electrodes. active substance use, and thus have received widespread attention. At present, the chemical preparation of carbon hollow spheres is mainly carried out by the template method and the template-free method. The template method mainly uses a core-shell structure composite sphere with a carbonizable shell....

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B31/00
Inventor 郭玉国辛森万立骏
Owner INST OF CHEM CHINESE ACAD OF SCI
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