Nano carbon material composite resin hard carbon electrode material as well as preparation method and application thereof

A composite resin and nano-carbon material technology, applied in the field of electrochemical materials, can solve the problems of easy collapse of pore structure, high irreversible capacity loss, and improvement of cycle stability, and achieve environmental pollution-free, controllable pore structure and pore ratio , the effect of inhibiting agglomeration

Pending Publication Date: 2021-07-23
昆山昆鹏利杰高分子材料技术有限公司
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  • Description
  • Claims
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Problems solved by technology

Hard carbon materials prepared from phenolic resins as raw materials can be used in low-temperature supercapacitors, but the irreversible capacity loss is high, and the cycle stability needs to be improved.
Adding graphene to the phenolic resin carbon material can improve the conductivity of the material, improve the power performance, increase the specific surface area of ​​the material, and improve the capacity, but the carbon structure does not change in essence, and the pore structure Fragile and easy to collapse, the irreversible capacity loss is still high, and the cycle stability still needs to be improved

Method used

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  • Nano carbon material composite resin hard carbon electrode material as well as preparation method and application thereof

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preparation example Construction

[0028] A kind of preparation method of nano-carbon material composite resin hard carbon electrode material of the present invention, comprises the following steps:

[0029] a. Stir and mix phenolic substances A such as phenol, cresol, xylenol, resorcinol, p-tert-butylphenol, butylphenol and formaldehyde solution B with a phenolic molar ratio of 1:2 to obtain a phenolic mixture liquid;

[0030] b. In the phenolic mixed solution prepared in step a, add a uniformly dispersed aqueous solution C in a weight ratio of 1 to 5:100 by nano-carbon material and phenol, and use mechanical mixing or ultrasonic mixing to obtain a uniformly dispersed mixed solution D. This step The dispersed aqueous solution C in the mixture is a mixed solution of graphene and carbon nanotubes, specifically composed of graphene, carbon nanotubes and surfactant SDS according to the mass ratio of 1 to 10:1 to 10:0.1 to 1, through stirring or ultrasonic mixed in a manner to obtain a homogeneous dispersion C;

...

Embodiment 1

[0039] This embodiment provides a nano-carbon material composite resin hard carbon electrode material, the preparation method is as follows:

[0040] a. Resorcinol A and formaldehyde aqueous solution B are mechanically stirred at a molar ratio of 1:2 for 0.5h and mixed uniformly to obtain a phenolic mixed solution;

[0041] b. Add the dispersed aqueous solution C to the phenolic mixed solution prepared in step a according to the weight ratio of nano-carbon material and phenol at 5:100, and ultrasonicate for 1 hour to obtain a uniformly dispersed mixed solution D. The dispersed aqueous solution C in this step is a mixed aqueous solution of graphene and carbon nanotubes, specifically obtained by graphene, carbon nanotubes and surfactant SDS according to a mass ratio of 10:10:1, and ultrasonic 1h;

[0042] c. Add an alkaline catalyst ammonia solution E to the mixed solution D, stir and mix evenly to obtain a reaction solution F, wherein the amount of ammonia added is 4%wt of phen...

Embodiment 2

[0049] a, phenol A and formaldehyde aqueous solution B are mechanically stirred at a molar ratio of 1:2 for 0.5h and mixed uniformly to obtain a phenolic mixed solution;

[0050] b. Add the dispersed aqueous solution C to the phenolic mixed solution prepared in step a according to the weight ratio of nano-carbon material and phenol at 1:100, and mechanically stir for 2 hours to obtain a uniformly dispersed mixed solution D. The dispersed aqueous solution C in this step is a mixed aqueous solution of graphene and carbon nanotubes, specifically obtained by graphene, carbon nanotubes and surfactant SDS according to a mass ratio of 5:15:1, and mechanical stirring for 10h;

[0051] c, add sodium carbonate aqueous solution E in mixed solution D, stir and mix to obtain reaction solution F, wherein sodium carbonate add-on is 5%wt of phenol;

[0052] d. Put the reaction solution F in a sealed container in a vacuum drying oven, and heat it at a constant temperature of 85° C. for 10 hour...

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Abstract

The invention discloses a preparation method of a nano carbon material composite resin hard carbon electrode material. The preparation method comprises the steps of preparing a phenolic aldehyde mixed solution; adding a dispersed aqueous solution of a nano carbon material into the phenolic aldehyde mixed solution to obtain a uniformly dispersed mixed solution; then adding an alkaline substance catalyst to obtain a reaction solution; heating the reaction solution at constant temperature in vacuum to obtain composite phenolic resin hydrogel; performing freeze drying on the composite phenolic resin hydrogel to obtain composite phenolic resin aerogel; crushing the composite phenolic resin aerogel, and carbonizing at low temperature to obtain composite resin carbon aerogel; performing high-temperature treatment on the composite resin carbon aerogel to obtain a composite resin hard carbon material; and uniformly mixing the composite resin hard carbon material, PTFE and ethanol to obtain the nano carbon material composite resin hard carbon electrode material. According to the invention, the phenolic resin source hard carbon is used as an active material main body, the production cost is low, and an aqueous reaction system is adopted, so that the method is environment-friendly and pollution-free.

Description

Technical field: [0001] The invention relates to the field of electrochemical materials, in particular to a nano-carbon material composite resin hard carbon electrode material and a preparation method and application thereof. Background technique: [0002] A supercapacitor is a new type of energy storage device between traditional capacitors and batteries. Compared with traditional capacitors, it has larger capacity and higher energy. Compared with batteries, it has extremely high power density, extremely long cycle life, better rate charge and discharge performance and wider operating temperature range. In addition, supercapacitors are environmentally friendly, pollution-free, and maintenance-free. Therefore, it has great application value and market potential in many fields such as transportation, electric power, communication, national defense, and consumer electronics. The performance of supercapacitors is mainly determined by the electrode materials. Therefore, an i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/32C01B32/194C01B32/168C01B32/05
CPCH01G11/86H01G11/32C01B32/05C01B32/168C01B32/194
Inventor 赵丹丹刘杰征圣全
Owner 昆山昆鹏利杰高分子材料技术有限公司
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