Title:
NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2008/001536
Kind Code:
A1
Abstract:
A negative electrode (10) for use in a non-aqueous electrolyte secondary battery
comprises an active material layer (12) containing a particle (12a) of an active
material. At least a part of the surface of the particle (12a) is coated with a
metal material (13) having a poor ability of forming a lithium compound. A void
is formed between the particles (12a) that are coated with the metal material
(13). The particle (12a) has a bulk density of 0.2 to 0.8 g/ml. Preferably, the
particle (12a) has a tap density of 0.5 to 1.1 g/ml. Also preferably, the metal
material (13) covers the surface of the particle (12a) in the thickness of 0.05
to 2 μm on average.
Inventors:
HYAKUTAKE MASAHIRO (JP)
SAKAGUCHI YOSHIKI (JP)
SAKAGUCHI YOSHIKI (JP)
Application Number:
PCT/JP2007/058244
Publication Date:
January 03, 2008
Filing Date:
April 16, 2007
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO (JP)
HYAKUTAKE MASAHIRO (JP)
SAKAGUCHI YOSHIKI (JP)
HYAKUTAKE MASAHIRO (JP)
SAKAGUCHI YOSHIKI (JP)
International Classes:
H01M4/38; C01B33/02; C25D7/00; H01M4/02; H01M4/04; H01M4/13; H01M4/134; H01M4/36; H01M4/62; H01M10/05
Foreign References:
JP2004241329A | 2004-08-26 | |||
JP2004296412A | 2004-10-21 | |||
JPH11242954A | 1999-09-07 | |||
JP2005285581A | 2005-10-13 |
Attorney, Agent or Firm:
HATORI, Osamu (8-6 Akasaka 1-chom, Minato-ku Tokyo 52, JP)
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