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Method for manufacturing substrates of three-dimensional graphene-nickel oxide composite materials

A composite material and graphene technology, which is applied in the manufacture of hybrid/electric double-layer capacitors, etc., can solve the problems of low film uniformity, large performance impact, and easy agglomeration of materials, and achieves simple preparation methods, types and dosages. The effect of less and better electrical performance

Active Publication Date: 2014-03-26
安徽省泰达创投科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional chemical method is used to prepare graphene composite materials, the method of reducing graphite oxide to prepare graphene composite materials is used. The materials prepared by this method are easy to agglomerate and have a great impact on performance.
In addition, when nickel oxide materials with different structures are used in the preparation of supercapacitor electrodes, the method of mixing powdered materials with PTFE emulsion and coating on the surface of the substrate is usually used. This method is cumbersome to operate and the resulting Film uniformity is not high

Method used

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  • Method for manufacturing substrates of three-dimensional graphene-nickel oxide composite materials
  • Method for manufacturing substrates of three-dimensional graphene-nickel oxide composite materials
  • Method for manufacturing substrates of three-dimensional graphene-nickel oxide composite materials

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) Weigh 1.2g phenol into a flask, melt it at 43°C, add 4.2mL aqueous solution containing 0.6g formaldehyde after dissolving, then add 30mL 0.1M NaOH aqueous solution, stir for 10min, and put the mixed solution at 70°C The reaction was carried out for 0.5h to obtain a resole phenolic resin solution.

[0022] (2) Add 30 mL of an aqueous solution containing 1.92 g of block copolymer F127 to the above solution, stir at room temperature for 2 h, add 100 mL of water for dilution, and stir at 68 °C for 12 h.

[0023] (3) Clean the nickel foam with ethanol, acetone and water for 15 minutes, then let it dry naturally, then put it into a 100mL polytetrafluoroethylene reactor filled with 25mL of the solution prepared in the previous step, soak for 3h, then add 45mL After diluting with deionized water, the reaction kettle was put into a hydrothermal tank to perform hydrothermal reaction at 130° C. for 16 hours.

[0024] (4) Take out the nickel foam sheet and dry it in an oven at...

Embodiment 2

[0029] (1) Weigh 1.2g phenol into a flask, melt it at 43°C, add 4.2mL aqueous solution containing 0.6g formaldehyde after dissolving, then add 30mL 0.1M NaOH aqueous solution, stir for 10min, and put the mixed solution at 70°C The reaction was carried out for 0.5h to obtain a resole phenolic resin solution.

[0030] (2) Add 30 mL of an aqueous solution containing 1.92 g of block copolymer F127 to the above solution, stir at room temperature for 2 h, add 100 mL of water to dilute, and then stir at 72 °C for more than 10 h.

[0031] (3) Clean the nickel foam with ethanol, acetone and water for 15 minutes, then let it dry naturally, then put it into a 100mL polytetrafluoroethylene reactor containing 10mL of the solution prepared in the previous step, soak it for 3h, then add 60mL After diluting with deionized water, the reaction kettle was put into a hydrothermal tank to perform hydrothermal reaction at 130° C. for 16 hours.

[0032] (4) Take out the nickel foam sheet and dry it...

Embodiment 3

[0034] (1) Weigh 1.2g phenol into a flask, melt it at 43°C, add 4.2mL aqueous solution containing 0.6g formaldehyde after dissolving, then add 30mL 0.1M NaOH aqueous solution, stir for 10min, and put the mixed solution at 75°C The reaction was carried out for 0.5h to obtain a resole phenolic resin solution.

[0035] (2) Add 30 mL of an aqueous solution containing 1.92 g of block copolymer F127 to the above solution, stir at room temperature for 2 h, add 150 mL of water to dilute, and then stir at 68 °C for 12 h.

[0036] (3) Clean the nickel foam with ethanol, acetone and water for 15 minutes, then let it dry naturally, then put it into a 100mL polytetrafluoroethylene reactor filled with 25mL of the solution prepared in the previous step, soak for 3h, then add 45mL After diluting with deionized water, the reaction kettle was put into a hydrothermal tank to perform hydrothermal reaction at 130° C. for 16 hours.

[0037](4) Take out the nickel foam sheet and dry it in an oven a...

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Abstract

The invention discloses a method for manufacturing substrates of three-dimensional graphene-nickel oxide composite materials. Non-ionic surfactants are used as structure-directing agents, water-soluble A-stage phenolic resin with a low molecular weight is used as a carbon source, foam nickel is used as a mold plate, and the three-dimensional graphene-nickel oxide composite materials can be manufactured by the hydrothermal reaction and high-temperature heat treatment combined method. The hydrothermal reaction temperature ranges from 120 DEG C to 140 DEG C, and the reaction lasts for 18 hours to 24 hours. A high-temperature heat treatment procedure includes raising the temperature at a rate ranging from 1 DEG C / min to 2 DEG C / min under the protection effect of nitrogen or inert gas until the temperature ranges from 300 DEG C to 400 DEG C, keeping the heat for 2 hours to 3 hours, raising the temperature at a rate ranging from 1 DEG C / min to 2 DEG C again until the temperature ranges from 700 DEG C to 900 DEG C, and keeping the heat for 1 hour to 2 hours. The method has the advantages that operation is easy, the apparent conductivity of nickel oxide materials can be effectively improved by the obtained three-dimensional support type graphene-nickel oxide composite materials, the substrates for three-dimensionally growing the materials can be provided, and the method has a wide application prospect in the field of electrode materials of supercapacitors.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional graphene-nickel oxide composite material substrate applicable to electrode materials in fields such as supercapacitors, and belongs to the technical field of preparation of functional nanomaterials. Background technique [0002] The energy problem is a major problem that mankind needs to solve urgently at present, and it directly affects the sustainable development of the economy and the healthy existence of human beings. As an electrochemical energy storage device completely different from batteries, supercapacitors have higher power output density and energy output density than traditional capacitors, longer cycle life than batteries, and can be charged and discharged quickly. It has the advantages of green environmental protection and no pollution. [0003] Electrode materials for electrochemical supercapacitors mainly include carbon materials, transition metal oxides, hydroxides, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86
Inventor 汪浩吴春卉邓思旭严辉刘晶冰孙玉绣
Owner 安徽省泰达创投科技有限公司
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