Method of manufacturing graphene-coated composite powder

Patent metadata

Field	Value
Publication number	US-9859030-B2
Application number	US-201514668153-A
Country	US
Kind code	B2
Filing date	Mar 25, 2015
Priority date	Apr 8, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A method of manufacturing a composite powder using wire explosion and a composite powder prepared by such a method are provided. The method of manufacturing a composite powder may involve coating a metal wire with a carbon-based material, and performing wire explosion on the metal wire coated with the carbon-based material in a solution. The prepared composite powder may include a metal core and a multilayer graphene film that coats a surface of the metal core.

First claim

What is claimed is:

1. A method of manufacturing composite powder, the method comprising:
coating a metal wire with a carbon-based material; and
performing a wire explosion on the metal wire coated with the carbon-based material in a solution.

2. The method according to claim 1 , wherein the metal wire is composed of copper, nickel, aluminum, iron, gold, silver, stainless steel, tin, zinc, titanium, tantalum, an alloy thereof, or a mixture thereof.

3. The method according to claim 1 , wherein the carbon-based material comprises graphene or graphite.

4. The method according to claim 3 , wherein the carbon-based material comprises graphene or graphite with a thickness of 1 to 20 carbon atom layers.

5. The method according to claim 4 , wherein the carbon-based material comprises graphene or graphite with a thickness of 1 to 10 carbon atom layers.

6. The method according to claim 4 , wherein the coating of the metal wire with the carbon-based material comprises:
synthesizing the graphene on a surface of the metal wire; or
transferring the synthesized graphene on the surface of the metal wire.

7. The method according to claim 1 , wherein the solution is an organic solution, an inorganic solution, or an organic and inorganic solution mixture.

8. The method according to claim 7 , wherein the solution comprises at least one selected from the group consisting of isopropyl alcohol, acetone, ethanol, methanol, a carbon compound solvent, a carbon-containing glycol, glycerine, triethanolamine or methylene chloride, deionized water, distilled water, hydrogen peroxide, a metal compound solvent, and a combination thereof.

9. The method according to claim 1 , wherein the metal powder obtained by the wire explosion comprises composite nanoparticles each comprising a metal core coated with a multilayer graphene sheet having a thickness of approximately 1 to 20 carbon atom layers.

10. A composite powder, comprising:
a metal particle coated with a carbon-coated layer,
the carbon-coated layer comprising a multilayer graphene film coating a surface of the metal particle and having electric conductivity,
wherein the multilayer graphene film having a thickness of 1 to 20 carbon atom layers.

11. The composite powder according to claim 10 , wherein the metal particle is composed of copper, nickel, aluminum, iron, gold, silver, stainless steel, tin, zinc, titanium, tantalum, or an alloy or mixture thereof.

12. The composite powder according to claim 10 , wherein the carbon-coated layer comprises 10 wt % or less of an amorphous carbon film based on a total weight of the carbon-coated layer.

13. A method of preparing a composition of composite powder, comprising:
obtaining a metal wire coated with a carbon-based material; and
performing a wire explosion on the metal wire coated with the carbon-based material in a solution.

14. The method according to claim 13 , the solution comprises at least one selected from the group consisting of isopropyl alcohol, acetone, ethanol, methanol, a carbon compound solvent, a carbon-containing glycol, glycerine, triethanolamine or methylene chloride, deionized water, distilled water, hydrogen peroxide, a metal compound solvent, and a combination thereof.

15. The method according to claim 13 , wherein the performing of the wire explosion comprises forming a plasma in the solution, and causing a condensation of nanoparticles comprising a metal core covered with a carbon-coated layer.

16. The method according to claim 13 , wherein the metal wire coated with the carbon-based material is obtained by forming a film comprising 2 to 5 layers of graphene sheets over the metal wire.

17. The method according to claim 15 , wherein the carbon-coated layer comprising a multilayer graphene film having a thickness of 1 to 20 graphene sheets.

Assignees

• Research & Business Found Sungkyunkwan Univ

Inventors

• Suh Sujeong
• Song Youngil
• Lee Jungwoo

Classifications

• B22F1/16

  Metallic particles coated with a non-metal (coated with lubricating or binding agents or with organic material B22F1/10) · CPC title

• H01B1/04

  mainly consisting of carbon-silicon compounds, carbon or silicon · CPC title

• H01B1/02 Primary

  mainly consisting of metals or alloys · CPC title

• B22F9/14 Primary

  using electric discharge · CPC title

• B22F1/02

  Operations & Transport · mapped topic