Porous Carbon Material

Patent metadata

Field	Value
Publication number	US-10756346-B2
Application number	US-201715417756-A
Country	US
Kind code	B2
Filing date	Jan 27, 2017
Priority date	Apr 4, 2007
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A porous carbon material is provided. The porous carbon material having a value of specific surface area of at least 10 m2/g as measured by a nitrogen BET method, a pore volume of at least 0.1 cm3/g as measured by a BJH method and a MP method, and a R value of 1.5 or greater, wherein the R value is expressed as R=B/A, wherein A is an intensity at an intersection between a baseline of a diffraction peak of a (002) plane as obtained based on powdery X-ray diffractometry of the porous carbon material and a perpendicular line downwardly drawn from the diffraction peak of the (002) plane, and wherein B is an intensity of the diffraction peak of the (002) plane.

First claim

The invention claimed is:

1. An electrode reactant comprising a porous carbon material having a value of specific surface area of at least 10 m 2 /g as measured by a nitrogen BET method, a pore volume of at least 0.1 cm 3 /g as measured by a BJH method and a MP method, and an R value of 1.5 or greater,
wherein the R value is expressed as R=B/A,
wherein A is an intensity at an intersection between a baseline of a diffraction peak of a (002) plane as obtained based on powdery X-ray diffractometry of the porous carbon material and a perpendicular line downwardly drawn from the diffraction peak of the (002) plane,
wherein B is an intensity of the diffraction peak of the (002) plane,
wherein the porous carbon material includes macropores, mesopores, and micropores, wherein the mesopores have pore sizes ranging from 2 nm to 50 nm, and the micropores have pore sizes smaller than 2 nm,
wherein the porous carbon material is prepared from a raw material, the raw material having a silicon content of at least 5 wt %, and
wherein the raw material being processed by an alkali treatment after carbonization to remove at least a portion of the silicon content, thereby obtaining the mesopores and macropores of the porous carbon material.

2. An electronic device comprising a battery including the electrode reactant according to claim 1 .

3. An electronic device comprising a battery including the electrode reactant according to claim 1 .

4. The electrode reactant according to claim 1 , wherein the raw material is one or more of rice husk, grass reed, and seaweed stem.

5. The electrode reactant according to claim 1 , wherein the raw material is processed by being heated to a first temperature of 400° C. to 1400° C., and activated by a gas or chemical activation step at a second temperature of 700° C. to 1000° C.

6. A capacitor material comprising a porous carbon material having a value of specific surface area of at least 10 m 2 /g as measured by a nitrogen BET method, a pore volume of at least 0.1 cm 3 /g as measured by a BJH method and a MP method, and an R value of 1.5 or greater,
wherein the R value is expressed as R=B/A,
wherein A is an intensity at an intersection between a baseline of a diffraction peak of a (002) plane as obtained based on powdery X-ray diffractometry of the porous carbon material and a perpendicular line downwardly drawn from the diffraction peak of the (002) plane,
wherein B is an intensity of the diffraction peak of the (002) plane,
wherein the porous carbon material includes macropores, mesopores, and micropores, wherein the mesopores have pore sizes ranging from 2 nm to 50 nm, and the micropores have pore sizes smaller than 2 nm,
wherein the porous carbon material is prepared from a raw material, the raw material having a silicon content of at least 5 wt %, and
wherein the raw material being processed by an alkali treatment after carbonization to remove at least a portion of the silicon content, thereby obtaining the mesopores and macropores of the porous carbon material.

7. The capacitor material according to claim 6 , comprising 0.01 wt % to 3 wt % of magnesium, 0.01 wt % to 3 wt % of potassium, and 0.05 wt % to 3 wt % of calcium.

8. The capacitor material according to claim 6 , wherein the raw material is one or more of rice husk, grass reed, and seaweed stem.

9. The capacitor material according to claim 6 , wherein the raw material is processed by being heated to a first temperature of 400° C. to 1400° C., and activated by a gas or chemical activation step at a second temperature of 700° C. to 1000° C.

10. A capacitor comprising the capacitor material according to claim 6 .

11. A capacitor comprising the capacitor material according to claim 7 .

Assignees

• Sony Corp

Inventors

• Tabata Seiichiro
• Yamada Shinichiro
• Kanno Masayoshi
• Noguchi Tsutomu
• Horie Takeshi

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• C01B32/00

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

• H01M2004/027

  Negative electrodes · CPC title

• C01P2006/12

  Surface area · CPC title

• C01B32/318

  characterised by the starting materials · CPC title