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Porous carbon microsphere with surface covered with graphene, and preparing method and application of porous carbon microsphere

A technology of porous microspheres and porous carbon, applied in the field of material science, can solve problems such as electrical performance and stability to be improved, limit the application of graphene, irreversible agglomeration, etc., and achieve industrialized large-scale production, excellent electrical conductivity, and controllable sex high effect

Active Publication Date: 2015-04-22
SUZHOU GRAPHENE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the π-π interaction between graphene sheets makes its agglomeration inevitable, which limits the application of graphene.
At present, a large number of researches aim to solve the problem of irreversible agglomeration of graphene. One of the research hotspots is to combine graphene with other inorganic or materials, such as inorganic nanomaterials, carbon nanotubes, polypyrrole solid spheres, polypyrrole tubes, etc. Composite, although it alleviates the agglomeration problem of graphene to a certain extent, but the production cost is high, and the comprehensive performance of the obtained product, such as electrical performance and stability, etc. still needs to be improved

Method used

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  • Porous carbon microsphere with surface covered with graphene, and preparing method and application of porous carbon microsphere
  • Porous carbon microsphere with surface covered with graphene, and preparing method and application of porous carbon microsphere
  • Porous carbon microsphere with surface covered with graphene, and preparing method and application of porous carbon microsphere

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Embodiment 1

[0028] Aminated polyacrylate microspheres with an average particle size of about 30 μm and quaternary amine groups attached to the surface (Suzhou Nawei Technology Co., Ltd., product model UniQ-30L, please refer to Figure 1a-Figure 1b , surface porous and no bonding phenomenon) as a template, uniformly dispersed in the concentration of 5% (wt) sulfonated graphene (diameter thickness of about 3-5 nanometers, can refer to CN103539105A; CN103359728A; Nano Letters, 2008,8 ( 6): 1679–1682 and other documents, which can also be obtained through commercial channels) in aqueous solution, after continuous stirring and soaking for 2 hours, put it in a constant temperature drying oven, and dry it at 60°C for 24 hours to obtain the dried product, namely Polymer porous microspheres / graphene composites (polymer porous microspheres coated with sulfonated graphene on the surface, please refer to Figure 2a-Figure 2b , the porous structure can be seen and there is no bonding phenomenon), and t...

Embodiment 2

[0032] Aminated polystyrene microspheres with an average particle size of about 100 μm and quaternary amine groups attached to the surface (Suzhou Nanomicro Technology Co., Ltd., product model PS1100) were used as templates and uniformly dispersed in sulfonated graphene with a concentration of 10 wt%. Water ((diameter and thickness about 3-5nm) solution, after continuous stirring and soaking for 2 hours, put it in a constant temperature drying oven, and dry it at 80°C for 48 hours to obtain the product after drying, that is, polymer porous microspheres / graphene Afterwards, put the dried product in a nitrogen atmosphere, raise the temperature to about 1200°C at a rate of 10°C / m / / , and carbonize at a high temperature for 2 hours to obtain the target product, that is, porous carbon microspheres coated with graphene on the surface , its diameter is about 70 μ m, and has porous structure (aperture about 35 / m), and graphene is covered on the surface of porous carbon microspheres. Thr...

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Abstract

The invention discloses a porous carbon microsphere with the surface covered with graphene, and a preparing method and application of the porous carbon microsphere. The polymer porous microsphere with the surface provided with the amination perssad serves as a template, the polymer microsphere is fully soaked in a sulfonation graphene water solution and dried, the sulfonation graphene and the polymer microsphere are combined, the polymer porous microsphere with the surface covered with sulfonation graphene is obtained and is carbonized at a high temperature in the protective atmosphere, and a target product, namely the porous carbon microsphere with the surface covered with graphene is obtained. The diameter of the target product is in the controllable range of 5 nm to 1,000 microns, a porous structure is achieved, the aperture is in the controllable range of 5 nm to 100 nm, a very large specific area is achieved, a very high electron transfer rate and good electrical conductivity are presented, the porous carbon microsphere can be widely applied to many fields such as catalyst loads, lithium ion batteries, supercapacitors, adsorption, sea water desalination and sensing, the preparing technology is simple, controllability of the reaction process is high, and industrial large-scale production is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a carbon-based material, in particular to a porous carbon microsphere covered with graphene on the surface, its preparation method and application, and belongs to the field of material science. Background technique [0002] Graphene, as a new type of two-dimensional ordered carbon material, has a large specific surface area, excellent electrical conductivity, electrochemical properties, thermal stability, and mechanical properties, so it has attracted widespread attention. However, the π-π interaction between graphene sheets makes its agglomeration inevitable, which limits the application of graphene. At present, a large number of researches aim to solve the problem of irreversible agglomeration of graphene. One of the research hotspots is to combine graphene with other inorganic or materials, such as inorganic nanomaterials, carbon nanotubes, polypyrrole solid spheres, polypyrrole tubes, etc. Compoundi...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 蒋永华郝建东栗建民
Owner SUZHOU GRAPHENE NEW MATERIAL TECH
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