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Double-layer phenolic hard carbon microspheres and preparation method and application thereof

A technology of phenolic hard carbon microspheres and double-layer structure, which is applied in the preparation/purification of carbon, structural parts, nano-carbon, etc., can solve the problems of low carbonization yield, single pore shape and size, etc., and achieve high reversible capacity and the effect of charge and discharge capacity

Inactive Publication Date: 2019-08-06
沙县宏盛塑料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore the phenolic microspheres of the prior art are mainly solid, single-layer microspheres, the carbonization yield is also low, and the pore morphology and size are relatively single

Method used

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  • Double-layer phenolic hard carbon microspheres and preparation method and application thereof
  • Double-layer phenolic hard carbon microspheres and preparation method and application thereof

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preparation example Construction

[0027] Specifically, a method for preparing a double-layer structure phenolic hard carbon microsphere according to an embodiment of the present invention at least includes the following steps:

[0028] (1) prepare inner layer microsphere;

[0029] (2) coating the inner microspheres to form an outer layer to prepare double-layer phenolic microspheres;

[0030] (3) Carbonizing the double-layer phenolic microspheres to obtain the double-layer structure phenolic hard carbon microspheres.

[0031] In the double-layer phenolic microsphere, one layer is phenolic resin, and the other layer is boron-containing phenolic resin.

[0032] Double-layer phenolic microspheres are the precursor of carbon microspheres, and their structure and composition significantly affect the internal structure of carbon microspheres, especially the specific surface area, pore volume, etc. When preparing the double-layer phenolic microspheres, the inner layer microspheres can be prepared first, and then th...

Embodiment 1

[0040]A double-layer structure phenolic hard carbon microsphere, the inner layer is carbon, and the outer layer is carbon and boron compound.

[0041] A preparation method of double-layer structure phenolic hard carbon microspheres, the steps are as follows:

[0042] (1) prepare inner layer microsphere;

[0043] (2) coating the inner microspheres to form an outer layer to prepare double-layer phenolic microspheres;

[0044] (3) Carbonizing the double-layer phenolic microspheres to obtain the double-layer structure phenolic hard carbon microspheres.

[0045] Specifically, in step (1), 1 g of resorcinol, 0.25 g of triphenyl borate, 2.2 g of 37% formaldehyde solution, 1.5 mL of ammonia water, 120 mL of water, and 80 mL of ethanol were added to the reaction vessel, and stirred at room temperature for 72 hours. , prepare the inner layer microspheres; then raise the temperature to 120 °C for 24 hours, and coat the inner layer microspheres to form an outer layer. The product is pre...

Embodiment 2

[0048] A double-layer structure phenolic hard carbon microsphere, the inner layer is carbon, and the outer layer is carbon and boron compound.

[0049] A preparation method of double-layer structure phenolic hard carbon microspheres, the steps are as follows:

[0050] (1) prepare inner layer microsphere;

[0051] (2) coating the inner microspheres to form an outer layer to prepare double-layer phenolic microspheres;

[0052] (3) Carbonizing the double-layer phenolic microspheres to obtain the double-layer structure phenolic hard carbon microspheres.

[0053] Specifically, in step (1), add 1 g of phenol, 1.72 g of 37% formaldehyde solution, 1.0 mL of ammonia water, 100 mL of water, and 100 mL of ethanol into a high-pressure reaction vessel, and react at 120°C for 24 hours to prepare inner microspheres; then triphenyl Add 0.2g of boric acid ester and 0.33g of 37% formaldehyde solution to the above mixture, react at 100°C for 48h, coat the inner layer of microspheres to form an...

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Abstract

The invention relates to the field of chemical synthetic resin microspheres, in particular to double-layer phenolic hard carbon microsphere and a preparation method and application thereof. The double-layer phenolic hard carbon microspheres each include an inner core and an outer shell, one of which is carbon and the other of which is a mixture of carbon and a boron compound. The preparation method at least comprises: (1) preparing inner layer microspheres; (2) coating the inner layer microspheres to form an outer layer so as to prepare double-layer phenolic microspheres; and (3) carbonizing the double-layer phenolic microspheres to obtain the double-layer phenolic hard carbon microspheres. Beneficial effects are that the double-layer phenolic hard carbon microspheres have different pore structures and distribution by utilizing the inner-outer structure and a difference in composition components. A battery prepared by adopting the disclosed microspheres as an electrode preparing material has high reversible capacity and charge and discharge capacity, and the capacity after 70 cycles is maintained at 80% or more.

Description

technical field [0001] The invention relates to the field of chemical synthetic resin microspheres, in particular to a double-layer structure phenolic hard carbon microsphere and its preparation method and application. Background technique [0002] Polymer microspheres refer to polymer materials or polymer composite materials with a particle size ranging from nanometer to micrometer and an apparent shape of spherical or other geometric shapes. Because the diameter of polymer microspheres is between nanometers and micrometers, this determines that polymer microspheres have the characteristics of small size, large specific surface area, and high specific surface energy. The small size of polymer microspheres can be used as an indicator and marking material, while the small volume enables it to quickly adapt to external stimuli, and can be used as a microreactor with high response speed; the large specific surface area and high ratio of polymer microspheres The surface energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C01B32/05H01M4/36H01M4/587H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/05C01B32/15H01M4/362H01M4/366H01M4/587H01M10/0525Y02E60/10
Inventor 黄世俊童跃进荀瑞芝张振伟王鑫罗建峰
Owner 沙县宏盛塑料有限公司
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