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US 2013/0256591 A1Published application
Negative electrode active material, electrode containing the same, and lithium ion secondary battery having the electrode
AssigneeTDK Corporation
InventorsYasuhiro IKEDA, Atsushi SANO, Masaki SOBU, Tetsuo TAKAISHI
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Abstract
A negative electrode active material mainly contains silicon and silicon oxide. In the negative electrode active material, an Ar-laser Raman spectrum thereof includes a peak A corresponding to 950±30 cm−1 and a peak B corresponding to 480±30 cm−1, and an intensity ratio of the peak B to the peak A (B/A) is in the range of 1 to 10.
Claims7
A negative electrode active material mainly comprising silicon and silicon oxide, wherein:
- an Ar-laser Raman spectrum thereof includes a peak. A corresponding to 950±30 cm−1 and a peak B corresponding to 480±30 cm−1;
- and
- an intensity ratio of the peak B to the peak A (B/A) is in the range of 1 to 10.
Dependencies are inferred from the claim text.