US 12,142,757 B2
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 Nov. 29, 2023, as Appl. No. 18/522,233.
Application 18/522,233 is a continuation of application No. 18/339,237, filed on Jun. 22, 2023, granted, now 11,870,065.
Claims priority of application No. 10-2022-0076581 (KR), filed on Jun. 23, 2022.
Prior Publication US 2024/0120471 A1, Apr. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/38 (2006.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/134 (2010.01); H01M 4/1391 (2010.01); H01M 4/1395 (2010.01); H01M 10/0525 (2010.01); 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 material comprising:
a silicon oxide;
lithium; and
sodium or potassium,
wherein
300≤106*A/(B2+C2)≤12.0*106, and  (1)
800≤A≤140,000,  (2)
where 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 material.