	US 11,870,065 B1
	Negative electrode for lithium secondary battery and method of manufacturing the same
Eun Jun Park, Daejeon (KR); Gwi Ok Park, Daejeon (KR); Hyo Shik Kil, Daejeon (KR); and In Ae Lee, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Jun. 22, 2023, as Appl. No. 18/339,237.
Claims priority of application No. 10-2022-0076581 (KR), filed on Jun. 23, 2022.
Int. Cl. H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 4/131 (2010.01); H01M 4/1391 (2010.01); H01M 4/134 (2010.01); H01M 4/1395 (2010.01); H01M 4/04 (2006.01); H01M 4/02 (2006.01)

CPC H01M 4/386 (2013.01) [H01M 4/0471 (2013.01); H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 4/1395 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)]

20 Claims

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.