Manufacturing method of porous composite electrode and organic removal method of porous composite electrode

Patent metadata

Field	Value
Publication number	US-11043338-B2
Application number	US-201816186357-A
Country	US
Kind code	B2
Filing date	Nov 9, 2018
Priority date	Nov 9, 2017
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A method of manufacturing a porous composite electrode including: preparing an ink including a carbon material and a binder; coating a substrate with the ink to manufacture a composite electrode; and irradiating the composite electrode with microwave to remove the binder and an organic material, and a method of removing an organic material of a porous composite electrode.

First claim

What is claimed is:

1. A method of manufacturing a porous carbon composite electrode, the method comprising:
a) preparing an ink including a solvent, a binder and two or more porous carbon materials; selected from the group consisting of single-walled carbon nanotubes, multi-walled carbon nanotubes, single-layer graphene and multi-layer graphene;
b) coating a porous metal foam substrate with the ink to provide an intermediate product comprising an ink layer on the porous metal foam substrate, and drying the ink layer to remove the solvent;
c) irradiating microwaves onto the ink layer to selectively remove the binder without deforming the porous metal foam substrate and the two or more porous carbon materials to provide the porous composite electrode comprising a porous carbon layer on the porous metal foam substrate; and
d) removing the porous metal foam substrate with a metal etching solution, thereby forming the porous carbon composite electrode consisting of a composite of the two or more porous carbon materials;
wherein the binder is at least one selected from the group consisting of polytetrafluoroethylene, polyvinylidene fluoride and polypyrrole.

2. The method of claim 1 , wherein in the c) irradiating of the composite electrode, the microwaves are irradiated at 600 to 1,000 W.

3. The method of claim 1 , wherein in the c) irradiating of the composite electrode, the microwaves are irradiated for 1 to 60 minutes.

4. The method of claim 1 , wherein the ink further comprises a solvent.

5. The method of claim 1 , wherein each of the porous carbon materials has a pore size of 0.3 to 5 nm.

6. The method of claim 1 , wherein the metal foam is at least one selected from the group consisting of nickel foam, copper foam, aluminum foam and titanium foam.

7. The method of claim 1 , wherein each of the porous carbon material in the ink has a specific surface area of 400 to 2,000 m 2 /g.

8. The method of claim 1 , wherein the binder is at least one selected from the group consisting of polytetrafluoroethylene and polyvinylidene fluoride.

Assignees

• Korea Res Inst Chemical Tech

Inventors

• Lee Sun Sook
• An Ki-Seok
• Lim Jongsun
• Myung Sung
• Song Wooseok
• Han Jin Kyu
• Jung Ha Kyun

Classifications

• H01G11/86 Primary

  specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title

• H01G11/26

  characterised by their structure, e.g. multi-layered, porosity or surface features · CPC title

• B05D3/029

  with microwaves · CPC title

• H01G11/38

  Carbon pastes or blends; Binders or additives therein · CPC title

• G01N27/4075

  Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts · CPC title