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Title:
NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY EMPLOYING IT
Document Type and Number:
WIPO Patent Application WO/2008/072430
Kind Code:
A1
Abstract:
A negative electrode for a nonaqueous electrolyte secondary battery which occludes/discharges lithium ions reversibly comprises a current collector (11) having a recess (12) and a protrusion (13) formed at least on one side, and a columnar body (15) having such a configuration that columnar body portions formed to stand obliquely on the protrusion (13) of the current collector (11) with the content ratio of elements varying sequentially in the longitudinal direction of the current collector (11) are laminated in n stages (n≥2) with the varying direction of content ratio of elements differing between the odd stage and even stage of the columnar body portion, wherein three surfaces (13a, 13b, 13c) at the longitudinal cross-section of at least the protrusion (13) is covered with the columnar body portion.

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Inventors:
UGAJI MASAYA
HASEGAWA MASAKI
YAMAMOTO TAISUKE
OHARA KEISUKE
Application Number:
PCT/JP2007/071602
Publication Date:
June 19, 2008
Filing Date:
November 07, 2007
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
UGAJI MASAYA
HASEGAWA MASAKI
YAMAMOTO TAISUKE
OHARA KEISUKE
International Classes:
H01M4/13; H01M4/134; H01M4/139; H01M4/1395; H01M4/36; H01M4/38; H01M4/48; H01M4/70
Domestic Patent References:
WO2007052803A12007-05-10
WO2007074654A12007-07-05
Foreign References:
JP2002170557A2002-06-14
JP2002313319A2002-10-25
JP2007172991A2007-07-05
JP2007194076A2007-08-02
JP2007128659A2007-05-24
JP4038233B22008-01-23
JP2003017040A2003-01-17
JP2002279974A2002-09-27
JP2005196970A2005-07-21
Other References:
See also references of EP 1968136A4
Attorney, Agent or Firm:
IWAHASHI, Fumio et al. (1006, Oaza Kadoma,Kadoma-shi, Osaka 01, JP)
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