Patent ID: 11958750
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 0:
1. A negative electrode active material comprising:
negative electrode active material particles including a silicon oxide (SiOx, 0<x≤2) and at least one lithium silicate selected from Li2SiO3, Li2Si2O5, and Li4SiO4 in at least a part of the silicon oxide,
wherein the negative electrode active material particles have a maximum peak position by a Raman spectrum of more than 460 cm−1 and less than 500 cm−1, and
wherein the negative electrode active material particles have a peak area ratio DIE according to an X-ray diffraction analysis method of less than 5.54 (D is an area of a Li2Si2O5 peak positioned at 24.9±0.3″, and E is an area of a Li2SiO3 peak positioned at 26.9±0.3″ in X-ray diffraction analysis).