Negative electrode active material, electrode containing the same, and lithium ion secondary battery having the electrode

摘要

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.

主权项

1. A negative electrode active material mainly comprising silicon and silicon oxide, wherein:
when measured with an Ar-ion laser with a wavelength of 514.532 nm as a laser source, an Ar-laser Raman spectrum of the negative electrode active material includes a peak A corresponding to 950 ±30 cm-1 and a peak B corresponding to 480 ±30cm-1; and an intensity ratio of the peak B to the peak A (B/A) is in the range of 1 to 10.