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Vertically oriented graphene as well as preparation method and application thereof

A technology of vertical orientation and graphene, applied in the direction of electrolytic inorganic material coating, etc., can solve the problems of narrow material application range, complex equipment, harsh conditions, etc., and achieve the effects of large-scale production, easy operation, and low cost

Pending Publication Date: 2022-07-08
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the chemical vapor deposition method, the required equipment is complex, the conditions are harsh, high temperature and vacuum are involved, the cost is high, and only pure graphene materials can be obtained, and the material application range is narrow

Method used

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  • Vertically oriented graphene as well as preparation method and application thereof
  • Vertically oriented graphene as well as preparation method and application thereof
  • Vertically oriented graphene as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) First, cut the nickel foam into 1cm×2cm slices, wash with hydrochloric acid, deionized water, and ethanol ultrasonically successively, and then put them into an oven for drying. Prepare respectively the graphene oxide dispersion liquid of 0.3g / L and the sodium chloropalladium solution of 4mmol / L, mix with volume ratio 1:1 to form mixed solution, take this mixed solution as electrolyte, take the foamed nickel of above-mentioned oven dry as The working electrode was deposited by cyclic voltammetry for 10 cycles under magnetic stirring. The working electrode was taken out, washed with a large amount of deionized water, and dried to obtain vertically oriented graphene on the foamed nickel sheet.

[0028] (2) prepare 0.05mol / L manganese acetate solution and 0.05mol / L sodium sulfate solution respectively, mix with volume ratio 1:1 to form mixed solution, take this mixed solution as electrolyte, with the vertically oriented graphite grown on foam nickel Graphene was used a...

Embodiment 2

[0031] (1) First, cut the nickel foam into 1cm×2cm slices, wash with hydrochloric acid, deionized water, and ethanol ultrasonically successively, and then put them into an oven for drying. Prepare respectively the graphene oxide dispersion liquid of 0.3g / L and the sodium chloropalladium solution of 4mmol / L, mix with volume ratio 1:1 to form mixed solution, take this mixed solution as electrolyte, take the foamed nickel of above-mentioned oven dry as The working electrode was deposited by cyclic voltammetry for 10 cycles under magnetic stirring. The working electrode was taken out, washed with a large amount of deionized water, and dried to obtain vertically oriented graphene on the foamed nickel sheet.

[0032] (2) respectively prepare 0.06mol / L manganese acetate solution and 0.06mol / L sodium sulfate solution, mix with volume ratio 1:1 to form a mixed solution, take this mixed solution as electrolyte, and use the vertically oriented graphite grown on foam nickel Graphene is th...

Embodiment 3

[0034] (1) First, cut the nickel foam into 1cm×2cm slices, wash with hydrochloric acid, deionized water, and ethanol ultrasonically successively, and then put them into an oven for drying. Prepare respectively the graphene oxide dispersion liquid of 0.3g / L and the sodium chloropalladium solution of 4mmol / L, mix with volume ratio 1:1 to form mixed solution, take this mixed solution as electrolyte, take the foamed nickel of above-mentioned oven dry as The working electrode was deposited by cyclic voltammetry for 5 cycles under magnetic stirring. The working electrode was taken out, washed with a large amount of deionized water, and dried to obtain vertically oriented graphene on the nickel foam sheet.

[0035] (2) Prepare 0.06mol / L manganese acetate solution and 0.06mol / L sodium sulfate solution respectively, mix them with a volume ratio of 1:1 to form a mixed solution, use the mixed solution as an electrolyte, and use the vertically oriented graphene grown on the nickel foam Fo...

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Abstract

The invention belongs to the technical field of nano material preparation, and discloses vertically-oriented graphene as well as a preparation method and application thereof. The preparation method comprises the following steps: growing vertically-oriented graphene on foamed nickel through an electro-deposition technology, and depositing manganese dioxide on a substrate by taking the vertically-oriented graphene grown on the foamed nickel as the substrate to prepare the composite material. The method and required equipment are simple in requirement, conditions are easy to control, the method is safe and low in cost, the prepared graphene has a large specific surface area, and a composite material obtained by compounding the graphene and manganese dioxide has good electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and particularly relates to a vertically oriented graphene and a preparation method and application thereof. Background technique [0002] Vertical graphene has attracted much attention due to its unique structural properties, including its non-agglomerated topography and extremely large specific surface area. Vertical graphene, also known as carbon nanowall, is a graphene material with through-channels and abundant edges formed by a graphene sheet structure consisting of multiple layers of graphene standing vertically on a substrate. As a typical oriented material, compared with traditional horizontal graphene, vertical graphene has the following obvious advantages in morphology: vertical oriented growth avoids the interlayer stacking of horizontal structures and improves the utilization rate of specific surface area; The exposed edge provides chemical modification sites, and a...

Claims

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Application Information

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IPC IPC(8): C25D9/04
CPCC25D9/04Y02E60/13
Inventor 郭艳欣苏小辉骆高丹
Owner GUANGDONG UNIV OF TECH
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