MATERIAL FOR NEGATIVE ELECTRODE OF NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, PROCESS FOR PRODUCING THE SAME, NEGATIVE ELECTRODE AND BATTERY

Title:

MATERIAL FOR NEGATIVE ELECTRODE OF NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, PROCESS FOR PRODUCING THE SAME, NEGATIVE ELECTRODE AND BATTERY

Document Type and Number:

WIPO Patent Application WO/2005/098998

Kind Code:

A1

Abstract:

A material for negative electrode of nonaqueous electrolyte secondary battery, comprised of a spherical carbon material of ≥ 0.8 sphericity, characterized in that the negative electrode material exhibits, as measured by X-ray diffractometry, a (002) average stratification plane spacing (d₀₀₂) of 0.365 to 0.400 nm and a crystallite diameter in the c-axis direction (Lc₍₀₀₂₎) of 1.0 to 3.0 nm and exhibits, as measured by elementary analysis, an atomic ratio between hydrogen and carbon (H/C) of ≤0.1 and an average particle diameter (Dv₅₀(μm)) of 1 to 20 μm. This negative electrode material is spherical and realizes excellent aptitudes including high output performance and durability.

Inventors:

SONOBE NAOHIRO
OHTA HIROSHI
AKITA TAKAHIRO

Application Number:

PCT/JP2005/005580

Publication Date:

October 20, 2005

Filing Date:

March 25, 2005

Export Citation:

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Assignee:

KUREHA CHEMICAL IND CO LTD (JP)
SONOBE NAOHIRO
OHTA HIROSHI
AKITA TAKAHIRO

International Classes:

C01B31/02; H01M4/133; H01M4/587; H01M10/05; H01M10/052; H01M4/131; H01M10/0525; (IPC1-7): H01M4/58; C01B31/02; H01M4/02

Domestic Patent References:

WO2002083557A1

2002-10-24

Foreign References:

JPH07320740A	1995-12-08
JPH0864207A	1996-03-08
JPS57208079A	1982-12-21
JPS6290863A	1987-04-25
JPS62122066A	1987-06-03
JPH0266856A	1990-03-06
JPH11185821A	1999-07-09
JPH06150927A	1994-05-31
JPH0620680A	1994-01-28

Other References: