Nitrogen-containing porous carbon material and method of producing the same, and electric double-layer capacitor using the nitrogen-containing porous carbon material

Patent metadata

Field	Value
Publication number	US-9281135-B2
Application number	US-201013512517-A
Country	US
Kind code	B2
Filing date	Nov 26, 2010
Priority date	Nov 30, 2009
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A nitrogen-containing carbon porous material, which has a nitrogen content of 0.5 to 30 mass %, and which has a specific surface area of 200 to 3,000 m 2 /g.

First claim

The invention claimed is:

1. A nitrogen-containing carbon porous material, comprising nitrogen at a content of 0.5 to 30 mass %, wherein the nitrogen-containing porous material has a specific surface area of 1,015 to 2,200 m 2 /g and contains oxygen at a content of 8.7 to 11.4 mass %,
wherein the nitrogen-containing carbon porous material is obtained by mixing and heating a melamine and magnesium citrate to form a carbon film containing the nitrogen on a carbon skeleton at a circumference of a particle of MgO formed by oxidation of Mg in the magnesium citrate upon heating, and then removing the MgO.

2. The nitrogen-containing carbon porous material according to claim 1 , wherein the mixing and heating a melamine and magnesium citrate comprises mixing the melamine and magnesium citrate, and heating a resultant mixture to 700° C. or more under an inert atmosphere, followed by cooling and washing with an acid.

3. An electrode material for an electric double-layer capacitor, which is formed by binding the nitrogen-containing carbon porous material according to claim 1 with a binder resin.

4. An electric double-layer capacitor, which is formed with the electrode material for an electric double-layer capacitor according to claim 3 in an electrode.

5. An electrode material for an electric double-layer capacitor, which is formed by binding the nitrogen-containing carbon porous material according to claim 2 with a binder resin.

6. An electric double-layer capacitor, which is formed with the electrode material for an electric double-layer capacitor according to claim 5 in an electrode.

7. A method of producing the nitrogen-containing carbon porous material according to claim 1 , comprising the steps of: mixing a melamine and magnesium citrate; heating the resultant mixture to 700° C. or more under an inert atmosphere; cooling; and washing with an acid.

8. The method of producing a nitrogen-containing carbon porous material according to claim 7 , wherein a retention time period at 700° C. or more is from 1 to 5,000 min.

9. The method of producing a nitrogen-containing carbon porous material according to claim 7 , wherein a temperature rising speed to a retention temperature of 700° C. or more is from 1 to 100° C./min.

10. The method of producing a nitrogen-containing carbon porous material according to claim 9 , wherein a retention time period at 700° C. or more is from 1 to 5,000 min.

Assignees

• Soneda Yasushi
• Kodama Masaya
• Morishita Takahiro
• Nat Inst Of Advanced Ind Scien
• Toyo Tanso Co

Inventors

• Soneda Yasushi
• Kodama Masaya
• Morishita Takahiro

Classifications

• C01B32/05

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

• C01B21/0605 Primary

  Binary compounds of nitrogen with carbon · CPC title

• H01G11/34 Primary

  characterised by carbonisation or activation of carbon · CPC title

• C01P2006/12

  Surface area · CPC title

• H01G11/32

  Carbon-based · CPC title