Title:
NONAQUEOUS ELECTROLYTE SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2013/099263
Kind Code:
A1
Abstract:
The present invention relates to a nonaqueous electrolyte secondary cell comprising a positive electrode, a negative electrode, a nonaqueous electrolyte, and a cell case holding the same, wherein the negative electrode contains SiOx (0.5 < x < 1.5) and a carbon material, the nonaqueous electrolyte contains a halogenated cyclic carbonate, and the ratio of the mass b of the halogenated cyclic carbonate contained in the nonaqueous electrolyte to the mass a of the SiOx contained in the negative electrode is 0.001 < b/a < 3. Preferably the percentage of SiOx that accounts for the total of SiOx and carbon material contained in the negative electrode is 3 mass% or greater, but less than 40 mass%. By means of the present invention a film derived from a halogenated cyclic carbonate can be sufficiently formed on the negative electrode active substance without there being excess or insufficient halogenated cyclic carbonate per silicon oxide, and there is not a tendency toward gas generation. Consequently, the cycle properties of the nonaqueous electrolyte secondary cell are effectively improved.
Inventors:
YAMAMOTO TAISUKE
HIRAOKA TATSUKI
TAKAHASHI KEIICHI
MURAOKA YOSHIYUKI
HIRAOKA TATSUKI
TAKAHASHI KEIICHI
MURAOKA YOSHIYUKI
Application Number:
PCT/JP2012/008383
Publication Date:
July 04, 2013
Filing Date:
December 27, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
H01M10/0567; H01M2/02; H01M4/13; H01M4/36; H01M4/48; H01M4/587; H01M10/0569; H01M10/058
Foreign References:
| JP2008210618A | 2008-09-11 | |||
| JP2011233497A | 2011-11-17 |
Attorney, Agent or Firm:
KAWASAKI, Shinichi et al. (JP)
Shin-ichi Kawasaki (JP)
Shin-ichi Kawasaki (JP)
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Claims:
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