# US 8,784,644 B2 · Stock oil composition for carbonaceous material for negative electrode of lithium-ion secondary battery

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- Number: US 8,784,644 B2
- Document ID: US8784644B2
- Status: Granted
- Kind: B2
- Application number: 13/727,815
- Filed: 2012-12-27
- Published: 2013-05-09
- Granted: 2014-07-22
- Earliest claimed: 2010-06-30
- Assignees: Jx Nippon Oil & Energy Corporation
- Applicants: Tamotsu Tano; Takashi Oyama; Hiroshi Ozawa; Jun Ougiya; Akio Sakamoto
- Inventors: Tamotsu Tano; Takashi Oyama; Hiroshi Ozawa; Jun Ougiya; Akio Sakamoto
- Web page: https://patentgrep.com/patent/US8784644B2

## CPC

- C01B 32/205: Preparation
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- B02C 23/00: Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group ({specially adapted for grain mills B02C11/00;} separating or sorting in general B03, B04, B07)
- C01B 32/20: Graphite
- H01M 4/587: for inserting or intercalating light metals
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using 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
- B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02})
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is a stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery which composition is useful for achieving excellent high-speed charge and discharge characteristics. The stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery uses a bottom oil of residue fluid catalytic cracking apparatus as a raw material. The stock oil composition comprises, of a saturated component, an aromatic component, a resin component and an asphaltene component detectable by development of the stock oil composition using thin-layer chromatography, the saturated component ranging from 30 to 50% by weight and the aromatic component ranging from 50 to 70% by weight; and has an average molecular weight of from 400 to 600.

## Claims

### Claim 1

A stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery, the composition comprising
a residue fluid catalytic cracking apparatus bottom oil as a raw material,
wherein the composition comprises a saturated component, an aromatic component, a resin component, and an asphaltene component detectable by development of the composition by using thin-layer chromatography, the saturated component ranging from 30 to 50% by weight and the aromatic component ranging from 50 to 70% by weight; and has an average molecular weight ranging from 400 to 600.

### Claim 2 (depends on 1)

A raw material carbon composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery, the raw material carbon composition being obtained by heat-treating the stock oil composition as claimed in claim 1.

### Claim 3 (depends on 2)

The raw material carbon composition according to claim 2, comprising a graphite-like carbon crystallite.

### Claim 4 (depends on 2, 3)

A method of preparing a carbonaceous material for a negative electrode of a lithium-ion secondary battery comprising at least the steps of:
pulverizing the raw material carbon composition as claimed in claim 2 or 3 into a raw material carbon composition powder having an average particle size of 30 μm or less; and
carbonizing and/or graphitizing the raw material carbon composition powder.

### Claim 5 (depends on 4)

A lithium-ion secondary battery comprising a negative electrode material comprising the carbonaceous material obtained by the method as claimed in claim 4.