Patent ID: 11870065
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A negative electrode for a lithium secondary battery comprising a negative electrode active material including:
a silicon oxide;
lithium; and
sodium or potassium,
wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2):

300≤106*A/(B2+C2)≤12.0*106  (1)

800≤A≤140,000  (2)

wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the negative electrode active material layer.