Title:
LITHIUM SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2012/132958
Kind Code:
A1
Abstract:
Provided is a lithium secondary battery which has excellent cycle characteristics.
This lithium secondary battery is provided with: a negative electrode wherein a negative electrode active material layer, which contains negative electrode active material particles, negative electrode conductive agent particles and a negative electrode binder, is arranged on a negative electrode collector; a positive electrode which contains a positive electrode active material; and a nonaqueous electrolyte. The concentration of the negative electrode conductive agent particles in a surface layer of the negative electrode active material layer, said surface layer being on the reverse side of the negative electrode collector-side surface layer, is higher than the concentration of the negative electrode conductive agent particles in the central portion of the negative electrode active material layer.
Inventors:
SAWA SHOUICHIRO (JP)
FUKUI ATSUSHI (JP)
SUNANO TAIZOU (JP)
FUKUI ATSUSHI (JP)
SUNANO TAIZOU (JP)
Application Number:
PCT/JP2012/056845
Publication Date:
October 04, 2012
Filing Date:
March 16, 2012
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
SAWA SHOUICHIRO (JP)
FUKUI ATSUSHI (JP)
SUNANO TAIZOU (JP)
SAWA SHOUICHIRO (JP)
FUKUI ATSUSHI (JP)
SUNANO TAIZOU (JP)
International Classes:
H01M4/134; H01M4/1395; H01M4/38; H01M4/505; H01M4/62; H01M10/052
Foreign References:
| JP2010165471A | 2010-07-29 | |||
| JP2007073334A | 2007-03-22 | |||
| JP2002222648A | 2002-08-09 | |||
| JP2010182479A | 2010-08-19 | |||
| JP2007257868A | 2007-10-04 | |||
| JP2009104900A | 2009-05-14 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
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Claims: