# US 2010/0163791 A1 · Porous Silicon-Containing Carbon-Based Composite Material, Electrode and Battery Formed Therefrom

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- Number: US 2010/0163791 A1
- Document ID: US20100163791A1
- Status: Published application
- Kind: A1
- Application number: 12/521,013
- Filed: 2007-12-27
- Published: 2010-07-01
- Earliest claimed: 2006-12-28
- Inventors: Hiroshi Fukui; Hisashi Ohsuka; Takakazu Hino; Kiyoshi Kanamura
- Web page: https://patentgrep.com/patent/US20100163791A1

## CPC

- C01B 33/20: Silicates (persilicates C01B15/14 {; containing aluminium C01B33/26})
- 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 11/32: Carbon-based
- H01G 11/34: characterised by carbonisation or activation of carbon
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/364: {as mixtures}
- H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- Y02E 60/10: Energy storage using batteries
- Y02E 60/13: Energy storage using capacitors
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- 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)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention relates to a porous silicon-containing carbon-based composite material produced by carbonizing both (1) a silicon metal or a silicon-containing compound and (2) an organic compound containing no silicon atoms and having a softening point or a melting point, in an inert gas or in a vacuum at a temperature ranging from 300 to 1,500° C. The porous silicon-containing carbon-based composite material of the present invention can be used as an electrode of a battery. Thereby, a battery which has an increased reversible capacity and stable charge and discharge cycle characteristics, and has a reduced loss of potential at the time of discharging lithium can be produced with a simple production process.

## Claims

### Claim 1

A porous silicon-containing carbon-based composite material obtainable by carbonizing both (1) a silicon metal or a silicon-containing compound and (2) an organic compound containing no silicon atoms, said composite material having a softening point or a melting point, in an inert gas or in a vacuum at a temperature ranging from 300 to 1,500° C.

### Claim 2 (depends on 1)

The composite material according to claim 1, wherein said softening point or melting point of said component (2) is 400° C. or less.

### Claim 3 (depends on 1)

The composite material according to claim 1, which is a particulate.

### Claim 4 (depends on 3)

The composite material according to claim 3, wherein the particulate has a maximum particle size of not more than 100 μm.

### Claim 5 (depends on 3)

The composite material according to claim 3, wherein the particulate has a BET specific surface area ranging from 0.5 m2/g to 500 m2/g.

### Claim 6 (depends on 3)

The composite material according to claim 3, wherein a pore volume ranges from 1.0×10−5 cm3/g to 1 cm3/g.

### Claim 7 (depends on 3)

The composite material according to claim 3, wherein an adsorption isotherm of nitrogen specified in IUPAC is classified in TYPE I.

### Claim 8 (depends on 1)

An electrode comprising the composite material as recited in claim 1.

### Claim 9 (depends on 8)

A battery comprising the electrode as recited in claim 8.

### Claim 10 (depends on 9)

The battery according to claim 9, which is a lithium ion secondary battery.

### Claim 11 (depends on 1)

The composite material according to claim 1, having a softening point or a melting point, in an inert gas or in a vacuum at a temperature ranging from 500 to 1,500° C.

### Claim 12 (depends on 1)

The composite material according to claim 1, having a softening point or a melting point, in an inert gas or in a vacuum at a temperature ranging from 600 to 1,300° C.