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

Claim 10:
11. A method of preparing the negative electrode active material of claim 1, the method comprising:
preparing silicon compound particles; and
mixing silicon compound particles and a Li precursor and performing heat treatment to prepare 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.