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Colloidal imprinted carbon CICs with adjustable pore throat size as well as synthesis method and application of colloidal imprinted carbon CICs

A synthesis method, CIC-X-Y technology, applied in the field of new porous carbon materials, to achieve good consistency

Active Publication Date: 2021-07-27
南京动量材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In our previous work, we also found that the pore-throat size of CICs has a great influence on the overall performance of the battery, but there is no related research so far. Therefore, the research on the pore-throat regulation of CICs is the difficulty and focus of this field.

Method used

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  • Colloidal imprinted carbon CICs with adjustable pore throat size as well as synthesis method and application of colloidal imprinted carbon CICs
  • Colloidal imprinted carbon CICs with adjustable pore throat size as well as synthesis method and application of colloidal imprinted carbon CICs
  • Colloidal imprinted carbon CICs with adjustable pore throat size as well as synthesis method and application of colloidal imprinted carbon CICs

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The specific technological process of the present embodiment is as follows:

[0042] S1, drying and grinding the silica sol with a particle size of 50nm to obtain silicon powder, and continuing to dry;

[0043] S2, adding the ethanol solution to the dry silica powder, stirring evenly to obtain the first mixture;

[0044] S3, drying the first mixture at 50° C., exposing it to air for a period of time after cooling, using water vapor in the air to hydrolyze TEOS, and then drying again to obtain silicon powder;

[0045] S4, mixing the dried silicon powder with the carbon precursor (mesophase pitch MP) to obtain a second mixture;

[0046] S5. Under a protective nitrogen atmosphere, heat-treat the second mixture at 300°C for 2 hours, cool to room temperature, and then gradually raise the temperature to 800°C for carbonization treatment for 4 hours, with a heating rate of 5°C / min;

[0047] S6, the solid product was refluxed in 3M NaOH solution for 24h to remove SiO 2 Templ...

Embodiment 2

[0050] The specific technological process of the present embodiment is as follows:

[0051]S1, drying and grinding the silica sol with a particle size of 50nm to obtain silicon powder, and continuing to dry;

[0052] S2. Add the ethanol dispersion solution of ethyl orthosilicate to the dry silica powder, and stir evenly to obtain the first mixture, wherein the mass concentration of ethyl orthosilicate is 4.96wt.%.

[0053] S3, drying the first mixture at 80° C., exposing it to air for a period of time after cooling, using water vapor in the air to hydrolyze TEOS, and then drying again to obtain silicon powder;

[0054] S4, mixing the dried silicon powder with the carbon precursor (mesophase pitch MP) to obtain a second mixture;

[0055] S5. Under the protective atmosphere of nitrogen, heat-treat the second mixture at 400°C for 2 hours, cool to room temperature, and then gradually raise the temperature to 900°C for carbonization treatment for 2 hours, with a heating rate of 5°...

Embodiment 3

[0059] The specific technological process of the present embodiment is as follows:

[0060] S1, drying and grinding the silica sol with a particle size of 50nm to obtain silicon powder, and continuing to dry;

[0061] S2. Add the ethanol dispersion solution of ethyl orthosilicate to the dry silica powder, and stir evenly to obtain the first mixture, wherein the mass concentration of ethyl orthosilicate is 8.67wt.%.

[0062] S3, drying the first mixture at 60° C., exposing it to air for a period of time after cooling, using water vapor in the air to hydrolyze TEOS, and then drying again to obtain silicon powder;

[0063] S4, mixing the dried silicon powder with the carbon precursor (mesophase pitch MP) to obtain a second mixture;

[0064] S5. Under a protective nitrogen atmosphere, heat the second mixture at 500°C for 5 hours, cool to room temperature, and then gradually heat up to 1200°C for carbonization treatment for 3 hours, with a heating rate of 5°C / min;

[0065] S6, th...

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Abstract

The invention discloses colloidal imprinting carbon (CICs) and a method for regulating and controlling the pore throat size of the colloidal imprinting carbon on the basis of keeping a porous microscopic ordered structure of the colloidal imprinting carbon. The expression of the CICs is CIC-X-Y, wherein X is the size of the pore throat, Y is the size of the pore diameter of a product, and X can be adjusted within a certain range. On the basis of ensuring that the pore diameter, the pore structure and the element composition are not influenced, the colloidal imprinted carbon (CICs) with different pore throat sizes are synthesized by adopting a special process, and the regulation and control on the pore throat sizes of the CICs are realized. Research finds that the sectional area of the CIC pore throat size and the ion diffusion speed in a channel are in a linear relationship, so that adjustment of the pore throat size has important positive influence on the electrical property of a material; moreover, a three-dimensional model of the CICs provided by the invention is consistent with a three-dimensional structure observed by the 3D-TEM, and the porosity, the shape and the electrochemical performance of the CIC material have good consistency.

Description

technical field [0001] The invention relates to a method for synthesizing carbon materials, in particular to a method for synthesizing colloidal imprinted carbon CICs with adjustable pore throat size and its application, and belongs to the technical field of novel porous carbon materials. Background technique [0002] Porous carbon is a versatile material that can be used as electrodes in electrochemical energy storage and conversion devices, and is often used as microporous layers (MPLs), gas diffusion layers (GDLs) and polymer electrolyte membrane fuel cells (PEMFCs). ) carbon support in the catalyst layer (CL). In addition, porous carbon is used to make electrodes for supercapacitors, batteries and electrolysis cells such as water electrolysis cells. During the preparation of porous materials, the control of their pore size distribution, porosity, morphology and pore network has always been a research hotspot. [0003] It has been found that one of the main factors limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/22H01G11/24H01G11/32H01G11/86B82Y30/00B82Y40/00
CPCH01G11/22H01G11/32H01G11/24H01G11/86B82Y30/00B82Y40/00
Inventor 维尔拉·博斯力小安玛娃·阿特瓦大卫·奥康奈尔
Owner 南京动量材料科技有限公司
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