Method of preparing heteroatom-doped carbon nanomaterial

Patent metadata

Field	Value
Publication number	US-10056603-B2
Application number	US-201715645933-A
Country	US
Kind code	B2
Filing date	Jul 10, 2017
Priority date	Nov 18, 2016
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

Provided is a method of preparing a heteroatom-doped carbon nanomaterial. The method includes preparing a dispersion solution by dispersing a carbon nanomaterial in a solvent, forming first droplets by spraying the dispersion solution via an ultrasonic spray nozzle, and forming second droplets including a heteroatom-doped carbon nanomaterial by supplying a gas to the first droplets to dope the first droplets with an element included in the gas.

First claim

What is claimed is:

1. A method of preparing a heteroatom-doped carbon nanomaterial, the method comprising:
preparing a dispersion solution by dispersing a carbon nanomaterial in a solvent;
forming first droplets by spraying the dispersion solution via an ultrasonic spray nozzle; and
forming second droplets comprising a heteroatom-doped carbon nanomaterial by supplying a gas to the first droplets to dope the first droplets with an element included in the gas.

2. The method of claim 1 , further comprising transferring the second droplets onto a substrate by using the gas.

3. The method of claim 2 , wherein the second droplets reach the substrate by being transferred by the gas in a direction different from a direction in which the first droplets are sprayed.

4. The method of claim 2 , wherein the substrate comprises a metal layer.

5. The method of claim 2 , further comprising forming a conductive material layer on the substrate.

6. The method of claim 5 , wherein the conductive material layer comprises at least one selected from carbon nanotubes, carbon nanofibers, metal nanowires, and conductive polymers.

7. The method of claim 1 , further comprising performing sonication on the dispersion solution before the spraying.

8. The method of claim 1 , wherein the solvent comprises at least one selected from N-methylpyrrolidone (NMP), dimethylformamide (DMF), dimethylsulfoxide (DMSO), and ethanol.

9. The method of claim 1 , wherein ultrasonic waves generated from the ultrasonic spray nozzle have a maximum frequency of about 180 kHz or more.

10. The method of claim 1 , wherein the carbon nanomaterial comprises at least one selected from reduced graphene oxide (rGO), carbon nanotubes, carbon nanofibers, graphite, and activated carbon.

11. The method of claim 1 , wherein the gas comprises at least one selected from nitrogen, oxygen, an inert element, and a halogen element.

Assignees

• Ulsan Nat Inst Science & Tech Unist
• Ulsan Nat Inst Science & Tech Unist

Inventors

• Kwon Tae-Hyuk
• Kim Hyuntak

Classifications

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/0419 Primary

  involving spraying · CPC title

• H01G11/36

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• H01G11/70

  characterised by their structure · CPC title

• C01B32/21

  After-treatment · CPC title