公开(公告)号：US12074312B2

公开(公告)日：2024-08-27

申请号：US18338348

申请日：2023-06-21

申请人： SK On Co., Ltd.

发明人： Eun Jun Park ,  Gwi Ok Park ,  Hyo Shik Kil ,  In Ae Lee

IPC分类号： H01M4/134 ,  H01M4/139 ,  H01M10/052 ,  B82Y30/00 ,  H01M4/02

CPC分类号： H01M4/134 ,  H01M4/139 ,  H01M10/052 ,  B82Y30/00 ,  H01M2004/027

摘要： Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a silicon-based negative electrode active material including iron and aluminum, wherein in ICP analysis of a negative electrode active material layer including the silicon-based negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) to (3):

A/(B2+C2)≤4,500  (1)

5≤B≤1,500  (2)

3≤C≤1,000  (3)



wherein A is a Li content in ppm, B is an Fe content in ppm, and C is an Al content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

公开(公告)号：US11870065B1

公开(公告)日：2024-01-09

申请号：US18339237

申请日：2023-06-22

申请人： SK On Co., Ltd.

发明人： Eun Jun Park ,  Gwi Ok Park ,  Hyo Shik Kil ,  In Ae Lee

IPC分类号： H01M4/38 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/02

CPC分类号： H01M4/386 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1395 ,  H01M10/0525 ,  H01M2004/027

摘要： Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes 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 ICP-analyzed negative electrode active material layer.