Title:
NEGATIVE-ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2007/148553
Kind Code:
A1
Abstract:
A negative-electrode active material for lithium ion secondary battery, comprising
a granulated substance obtained by subjecting a mixture of a metal powder capable
of lithium ion occlusion and release and at least one graphite charge material
selected from the group consisting of a flake graphite and an artificial graphite
of 0.336 nm or less (002)-face interplanar spacing to pulverization in high-velocity
air current and granulation, wherein part of the graphite as the charge material
is pulverized so as to have a structure of laminate of the graphite charge material
and pulverizate thereof in which at the surface or interior thereof, a metal powder
is dispersed. This negative-electrode active material for lithium ion secondary
battery is a novel active material of high performance, simultaneously realizing
high charge/discharge capacity and excellent cycle characteristics.
Inventors:
KATSUURA MASAMITSU (JP)
SOGABE TOSHIAKI (JP)
MORITA KOICHI (JP)
SOGABE TOSHIAKI (JP)
MORITA KOICHI (JP)
Application Number:
PCT/JP2007/061712
Publication Date:
December 27, 2007
Filing Date:
June 11, 2007
Export Citation:
Assignee:
OSAKA GAS CHEMICALS CO LTD (JP)
KATSUURA MASAMITSU (JP)
SOGABE TOSHIAKI (JP)
MORITA KOICHI (JP)
KATSUURA MASAMITSU (JP)
SOGABE TOSHIAKI (JP)
MORITA KOICHI (JP)
International Classes:
H01M4/133; H01M4/36; H01M4/38; H01M4/587
Foreign References:
| JP2000149927A | 2000-05-30 | |||
| JP2005243508A | 2005-09-08 | |||
| JP2001210329A | 2001-08-03 | |||
| JP2007141573A | 2007-06-07 |
Attorney, Agent or Firm:
SAEGUSA, Eiji et al. (1-7-1 Doshomachi, Chuo-k, Osaka-shi Osaka 45, JP)
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