US 11,670,762 B2
Negative active material for rechargeable lithium battery and rechargeable lithium battery including same
Chul Youm, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on Feb. 16, 2021, as Appl. No. 17/176,592.
Claims priority of application No. 10-2020-0022393 (KR), filed on Feb. 24, 2020.
Prior Publication US 2021/0265626 A1, Aug. 26, 2021
Int. Cl. H01M 4/38 (2006.01); H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 4/583 (2010.01); H01M 10/0525 (2010.01); H01M 10/44 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/386 (2013.01) [H01M 4/366 (2013.01); H01M 4/48 (2013.01); H01M 4/583 (2013.01); H01M 10/0525 (2013.01); H01M 10/44 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A negative active material for a rechargeable lithium battery, comprising:
a silicon particle core comprising a silicon particle having a particle size in a micrometer range;
an oxide layer having a thickness in a range of about 65 nm to about 450 nm, on the silicon particle core; and
a conductive layer on the oxide layer,
wherein the oxide layer comprises SiOx, 0<x≤2.