Porous graphene film, its manufacturing method and electronic product

Patent metadata

Field	Value
Publication number	US-11512000-B2
Application number	US-201816327200-A
Country	US
Kind code	B2
Filing date	Apr 13, 2018
Priority date	Aug 22, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A porous graphene film, its manufacturing method and an electronic product are provided. The method of manufacturing the porous graphene film includes: mixing a dispersion liquid of graphene with a dispersion liquid of particles, and performing a film-forming process to form a mixed film of graphene and particles; and removing the particles in the mixed film of graphene and particles to form the porous graphene film. The porous graphene film prepared by the method has a large specific surface area and an excellent electroconductivity.

First claim

What is claimed is:

1. A method of manufacturing a porous graphene film, comprising:
mixing a dispersion liquid of graphene with a dispersion liquid of particles to form a mixed liquid;
adjusting pH value of the mixed liquid by adding NH 3 .H 2 O to about 9 to about 11;
performing a film-forming process to form a mixed film of graphene and particles; and
removing the particles in the mixed film of graphene and particles to form the porous graphene film.

2. The method of manufacturing the porous graphene film according to claim 1 , wherein the graphene is a reduced graphene oxide.

3. The method of manufacturing the porous graphene film according to claim 2 , further comprising: preparing a graphene oxide, and then reducing the graphene oxide to obtain the reduced graphene oxide.

4. The method of manufacturing the porous graphene film according to claim 3 , wherein the graphene oxide is prepared by a Hummers method.

5. The method of manufacturing the porous graphene film according to claim 1 , wherein the particles have a particle size of from about 0.3 micron to about 3.0 microns.

6. The method of manufacturing the porous graphene film according to claim 1 , wherein the particles are organic polymer particles or inorganic particles.

7. The method of manufacturing the porous graphene film according to claim 6 , wherein the organic polymer particles are polystyrene particles, polypyrrole particles or polyaniline particles;
the inorganic particles are silica particles, titanium dioxide particles or manganese dioxide particles.

8. The method of manufacturing the porous graphene film according to claim 7 , wherein the polystyrene particles are polystyrene microspheres having a diameter of about 0.3 micron to about 3.0 microns.

9. The method of manufacturing the porous graphene film according to claim 8 , further comprising preparing the polystyrene microspheres by using styrene as a monomer and azobisisobutyronitrile as an initiator.

10. The method of manufacturing the porous graphene film according to claim 1 , wherein the mixed film of graphene and particles is formed by a suction filtration process.

11. The method of manufacturing the porous graphene film according to claim 1 , wherein the pH value of the mixed liquid is adjusted to about 10.

12. The method of manufacturing the porous graphene film according to claim 1 , wherein the particles in the mixed film of graphene and particles are removed by a solution immersion process or a high temperature calcination process.

13. The method of manufacturing the porous graphene film according to claim 12 , wherein the particles in the mixed film of graphene and particles are removed by being dissolved in tetrahydrofuran, toluene, dichloromethane or an acid solution; or
the particles in the mixed film of graphene and particles are removed by being melted through heating the mixed film of graphene and particles at a temperature higher than a melting point of the particles.

14. The method of manufacturing the porous graphene film according to claim 2 , wherein the particles have a particle size of from about 0.3 micron to about 3.0 microns.

15. The method of manufacturing the porous graphene film according to claim 2 , wherein the particles are organic polymer particles or inorganic particles.

16. The method of manufacturing the porous graphene film according to claim 2 , wherein the mixed film of graphene and particles is formed by a suction filtration process.

17. The method of manufacturing the porous graphene film according to claim 1 , wherein after adjusting the pH value of the mixed liquid, ultrasonic treatment is carried out to make the mixed liquid uniform.

18. The method of manufacturing the porous graphene film according to claim 2 , wherein after adjusting the pH value of the mixed liquid, ultrasonic treatment is carried out to make the mixed liquid uniform.

Assignees

• Fuzhou Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Dai Wenqin
• Chen Xia

Classifications

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C01B32/194 Primary

  After-treatment · CPC title

• C01B32/196 Primary

  Purification · CPC title

• B01D67/0058

  by selective elimination of components, e.g. by leaching · CPC title

• H01B1/04

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