# US 2021/0344010 A1 · Carbon material and production method therefor, electrode material for power storage device, and power storage device

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- Number: US 2021/0344010 A1
- Document ID: US20210344010A1
- Status: Published application
- Kind: A1
- Application number: 17/271,311
- Filed: 2019-08-26
- Published: 2021-11-04
- Earliest claimed: 2018-08-28
- Assignees: Sekisui Chemical Co., Ltd.
- Applicants: Sekisui Chemical Co., Ltd.
- Inventors: Naoki SASAGAWA; Takuya WADA
- Web page: https://patentgrep.com/patent/US20210344010A1

## CPC

- C01B 32/182: Graphene
- H01M 4/587: for inserting or intercalating light metals
- C01B 32/19: by exfoliation
- C01B 32/21: After-treatment
- C01B 32/225: Expansion; Exfoliation
- C01B 32/342: characterised by non-gaseous activating agents
- H01G 11/24: 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
- H01G 11/34: characterised by carbonisation or activation of carbon
- H01G 11/36: Nanostructures, e.g. nanofibres, nanotubes or fullerenes
- H01G 11/86: specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34)
- H01M 4/364: {as mixtures}
- C01B 2204/22: Electronic properties
- C01B 2204/32: Size or surface area
- C01P 2006/11: Powder tap density
- C01P 2006/12: Surface area
- C01P 2006/14: Pore volume
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Provided is a carbon material, which can increase the capacitance in an electrical storage device. Provided is a carbon material including a carbon material that has a graphene laminated structure, where the carbon material has a BET specific surface area of 240 m2/g or more, and has a powder density of 0.5 g/cc or more when 0.1 g of the carbon material is put in a container with a cross-sectional area of 3.14 cm2 and compressed at a pressure of 16 kN.

## Claims

### Claim 1

A carbon material comprising a carbon material that has a graphene laminated structure,
the carbon material having a BET specific surface of 240 m2/g or more, and
having a powder density of 0.5 g/cc or more when 0.1 g of the carbon material is put in a container with a cross-sectional area of 3.14 cm2 and compressed at a pressure of 16 kN.

### Claim 2 (depends on 1)

The carbon material according to claim 1, wherein the carbon material has a BET specific surface area of 450 m2/g or more.

### Claim 3 (depends on 1)

The carbon material according to claim 1, wherein the carbon material has a mesopore volume of 0.04 mL/g or more measured in accordance with a BJH method.

### Claim 4 (depends on 1)

The carbon material according to claim 1, wherein the carbon material has a micropore volume of 0.20 mL/g or more measured in accordance with an MP method.

### Claim 5 (depends on 1)

The carbon material according to claim 1, wherein X/Y meets 0.3<X/Y<4, where the micropore volume of the carbon material, measured in accordance with the MP method, is expressed by X mL/g and the mesopore volume of the carbon material, measured in accordance with the BJH method, is expressed by Y mL/g.

### Claim 6 (depends on 1)

The carbon material according to claim 1, wherein the carbon material that has the graphene laminated structure is graphite or exfoliated graphite.

### Claim 7 (depends on 6)

The carbon material according to claim 6, wherein the graphite or the exfoliated graphite is partially exfoliated graphite in which graphite is partially exfoliated.

### Claim 8 (depends on 1)

The carbon material according to any claim 1, wherein the carbon material further comprises a resin carbide.

### Claim 9 (depends on 8)

The carbon material according to claim 8, wherein a content of the resin carbide in the carbon material is 1% by weight or more and 99.9% by weight or less.

### Claim 10 (depends on 8)

The carbon material according to claim 8, wherein the resin carbide contains an aromatic ring.

### Claim 11 (depends on 1)

A method for producing a carbon material according to claim 1, the method comprising:
a mixing step of mixing graphite or primary exfoliated graphite with a resin;
a step of, in the mixing step or after the mixing step, further mixing an activator to obtain a mixture; and
a step of subjecting the mixture to an activation treatment.

### Claim 12 (depends on 11)

The method for producing a carbon material according to claim 11, wherein the composition comprising the graphite or the primary exfoliated graphite and the resin is heated at a temperature of 200° C. to 500° C. in the mixing step.

### Claim 13 (depends on 11)

The method for producing a carbon material according to claim 11, wherein the mixture comprising the graphite or the primary exfoliated graphite, the resin, and the activator is heated at a temperature of 200° C. to 500° C. in the mixing step.

### Claim 14 (depends on 11)

The method for producing a carbon material according to claim 11, wherein the resin is a resin having an aromatic ring.

### Claim 15 (depends on 14)

The method for producing a carbon material according to claim 14, wherein the resin having an aromatic ring contains an aromatic polyester resin.

### Claim 16 (depends on 14)

The method for producing a carbon material according to claim 14, wherein the resin having an aromatic ring is a reaction product of a compound having a hydroxyl group and a compound having a carboxyl group.

### Claim 17 (depends on 16)

The method for producing a carbon material according to claim 16, wherein the compound having a hydroxyl group is a polyhydric alcohol.

### Claim 18 (depends on 16)

The method for producing a carbon material according to claim 16, wherein the compound having carboxyl is an aromatic polycarboxylic acid derivative.

### Claim 19 (depends on 1)

An electrode material for an electrical storage device, the electrode material containing the carbon material according to claim 1.

### Claim 20 (depends on 19)

An electrical storage device comprising an electrode made from the electrode material for an electrical storage device according to claim 19.