Title:
POWDER FOR LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE MATERIAL, LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE USING SAME, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2013/175715
Kind Code:
A1
Abstract:
A powder for a lithium ion secondary battery negative electrode material, characterized in that: the powder comprises SiOx (0.4≤x≤1.2); and, in the spectrum measured by silicon-29 nuclear magnetic resonance, the ratio of the peak index assignable to zerovalent Si to the peak index assignable to tetravalent Si is 0.65 to 0.80, while the peak top assignable to tetravalent Si is present within a range of -110 to -105ppm. This powder for a negative electrode material makes it possible to produce a lithium ion secondary battery which has a high charge/discharge capacity and excellent cycle characteristics.
Inventors:
KANNO HIDEAKI (JP)
ONISHI TAKASHI (JP)
ONISHI TAKASHI (JP)
Application Number:
PCT/JP2013/002878
Publication Date:
November 28, 2013
Filing Date:
April 30, 2013
Export Citation:
Assignee:
OSAKA TITANIUM TECHNOLOGIES CO (JP)
International Classes:
H01M4/36; H01M4/38; H01M4/48
Foreign References:
| JP2004063433A | 2004-02-26 | |||
| JP2011090869A | 2011-05-06 | |||
| JP2011076788A | 2011-04-14 |
Attorney, Agent or Firm:
M. MORI PATENT FIRM (JP)
Patent business corporation Woods Michio patent firm (JP)
Patent business corporation Woods Michio patent firm (JP)
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