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Porous electrode carbon as well as preparation method and application thereof

An electrode and nano-electrode technology, applied in the field of supercapacitors, can solve the problems of high price and failure of porous nano-electrode carbon to achieve breakthroughs

Pending Publication Date: 2022-05-13
YUYUE HOME TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the industrial preparation of porous nano-electrode carbon has not been able to achieve a breakthrough
This is mainly due to the fact that the preparation process of porous nano-electrode carbon needs to go through a supercritical drying process, which is expensive and has certain risks. As a result, porous nano-electrode carbon can usually only be prepared in the laboratory on the order of grams.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The invention provides a kind of preparation method of porous nano-electrode carbon, comprising the following steps:

[0022] A) After mixing m-p-cresol and formaldehyde in water, add an alkali catalyst, transfer to an incubator to cultivate the intermediate, and obtain a wet intermediate;

[0023] B) immersing the wet intermediate in a polyether solution, performing water replacement, and drying to obtain a dry intermediate;

[0024] C) carbonizing the dry intermediate under a nitrogen atmosphere to obtain carbonized electrode carbon;

[0025] D) the carbonized electrode carbon in CO 2 Activated under the atmosphere to obtain porous nano-electrode carbon.

[0026] In the present invention, it is preferred to add m-p-cresol into water, then add formaldehyde solution, mix evenly, add alkali catalyst, stir and mix and seal the mixed solution.

[0027] In the present invention, the molar ratio of m-p-cresol to formaldehyde is preferably 1: (1-3), more preferably 1:2; th...

Embodiment 1

[0052] At room temperature, add m-p-cresol to deionized water, then add formaldehyde solution, and finally add NaOH powder, keep stirring for 1 hour, seal and wait for incubation;

[0053] Transfer the stock solution to a closed container and place it in an incubator, and cultivate the intermediate according to the set temperature program to obtain a wet intermediate, which is broken into small pieces of 3 to 5 cm for use;

[0054] Use allyl alcohol polyoxyalkyl ether as the solute and deionized water as the solvent to prepare a 1% polyether solution, and soak the wet gel block in poly In the ether solution for 8 hours, after filtration, the wet gel was transferred to a drying oven at 50°C for drying.

[0055] Transfer the xerogel to a carbonization furnace under N 2 Carry out carbonization under the atmosphere, the temperature range is from room temperature to 1050 ℃, constant temperature 120min, N 2 Intake rate 0.8m 3 / h to obtain carbonized electrode carbon.

[0056] Tr...

Embodiment 2

[0060] (1) The activated porous nano-electrode carbon obtained in Example 1 is mixed with the conductive carbon black, the adhesive SBR is fully mixed according to the mass ratio of 8:1:1, and the conductive paste is evenly obtained by adding water and stirring, the solid content of the conductive paste 25%, the slurry was evenly coated on an aluminum foil, and dried at 80°C to prepare a carbon layer electrode with a thickness of 90 μm.

[0061] (2) The carbon-layer electrode was pressed into a circular electrode sheet with a diameter of 14 mm, and vacuum-dried at 150° C. for 12 hours to obtain an electrode sheet.

[0062] (3) Two dry circular electrode sheets of the same size were used as the positive and negative electrodes respectively, the cellulose film was used as the diaphragm, and the pc solution of the binder SBR was used as the electrolyte to assemble a supercapacitor.

[0063] (4) Adopt electrochemical workstation to test the electrochemical performance of the super...

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Abstract

The invention provides a preparation method of porous nano electrode carbon, which comprises the following steps: A) mixing m-cresol and formaldehyde in water, adding an alkali catalyst, transferring into a constant temperature box, and culturing an intermediate to obtain a wet intermediate; b) immersing the wet intermediate in a polyether solution, carrying out water replacement, and drying to obtain a dry intermediate; c) carbonizing the dry intermediate in a nitrogen atmosphere to obtain carbonized electrode carbon; and D) activating the carbonized electrode carbon in a CO2 atmosphere to obtain the porous nano electrode carbon. On the basis of a sol-gel method, m-cresol, p-cresol and a formaldehyde solution are used as precursors, NaOH is used as a catalyst to prepare an intermediate, then the intermediate and a polyether solution are subjected to water replacement, and then the porous nano electrode carbon is prepared through carbonization and activation. The preparation method disclosed by the invention is simple, low in cost and capable of realizing industrial batch production. The invention also provides a preparation method and application of the porous nano electrode carbon.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a porous electrode carbon, its preparation method and application. Background technique [0002] The electrode materials of supercapacitors are mainly composed of porous carbon materials, including carbon nanotubes, activated carbon, graphene, porous nano-electrode carbon, etc. Porous nanoelectrode carbon is a new type of carbon material with a continuous nanoporous material structure, which has high specific surface area, high porosity, good electrical conductivity, and controllable pore size, and has attracted extensive attention. Using resorcinol and formaldehyde as raw materials, an organic electrode carbon with low density and low thermal conductivity was prepared through sol-gel and supercritical drying processes, and a porous nano-electrode carbon was prepared through a further high-temperature carbonization process. This pioneering work laid the found...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/336H01G11/26H01G11/34H01G11/44
CPCC01B32/318C01B32/336H01G11/26H01G11/34H01G11/44
Inventor 马春印王玉平苏风驰齐乐乐刘尊东张磊文洪杰高洪国陈伟周艺
Owner YUYUE HOME TEXTILE
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