Method for producing porous carbon material

Patent metadata

Field	Value
Publication number	US-10894716-B2
Application number	US-201816305228-A
Country	US
Kind code	B2
Filing date	Apr 12, 2018
Priority date	Apr 14, 2017
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

Provided is a method for producing a porous carbon material, containing a step of subjecting a mixture containing inorganic carbide particles and inorganic oxide particles to a heat treatment under a chlorine gas atmosphere.

First claim

The invention claimed is:

1. A method for producing a porous carbon material comprising:
a step of subjecting a mixture comprising inorganic carbide particles and inorganic oxide particles to a heat treatment under a chlorine gas atmosphere,
wherein the inorganic oxide particles have an average particle diameter of smaller than 20 nm and are amorphous.

2. The method for producing a porous carbon material according to claim 1 ,
wherein the mixture comprises the inorganic oxide in a ratio of 3 mol % or more and 8 mol % or less relative to the total of mass amounts of the inorganic carbide and the inorganic oxide in the mixture.

3. The method for producing a porous carbon material according to claim 1 ,
wherein the inorganic oxide particles have an average particle diameter of smaller than 15 nm.

4. The method for producing a porous carbon material according to claim 1 ,
wherein the inorganic oxide particles have an average particle diameter of larger than 8 nm.

5. The method for producing a porous carbon material according to claim 1 ,
wherein the heat treatment is performed at 1,000° C. or higher.

6. The method for producing a porous carbon material according to claim 1 ,
wherein the heat treatment is performed at 1,000° C. or higher and 1,300° C. or lower.

7. The method for producing a porous carbon material according to claim 1 ,
wherein the inorganic carbide is SiC and the inorganic oxide is SiO 2 .

8. The method for producing a porous carbon material according to claim 7 ,
wherein the SiC has a particle diameter of 5 μm or less.

9. The method for producing a porous carbon material according to claim 7 ,
wherein the SiC has a β-type crystal structure and the SiC has a specific surface area calculated by BET method from its nitrogen adsorption isotherm being 10 m 2 /g or more.

10. The method for producing a porous carbon material according to claim 1 ,
wherein the inorganic carbide is SiC and the inorganic oxide is amorphous SiO 2 .

11. The method for producing a porous carbon material according to claim 1 ,
wherein the mixture comprises the inorganic oxide in a ratio of 2 mol % or more and 12 mol % or less relative to the total of mass amounts of the inorganic carbide and the inorganic oxide in the mixture.

Assignees

• Sumitomo Electric Industries

Inventors

• Ishikawa Shinji
• Saito Takahiro

Classifications

• C01B32/00 Primary

  Carbon; Compounds thereof (C01B21/00, C01B23/00 take precedence; percarbonates C01B15/10; carbon black C09C1/48) · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• H01G11/24

  characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title

• H01G11/86

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