US 12,444,736 B2
Negative active material and rechargeable lithium battery including same
Hyejin Kim, Yongin-si (KR); Pil Jin Yoo, Yongin-si (KR); Deok-Hyun Kim, Yongin-si (KR); Youngugk Kim, Yongin-si (KR); Jaehou Nah, Yongin-si (KR); Ilyoung Choi, Yongin-si (KR); Eunji Kang, Yongin-si (KR); Sunil Park, Yongin-si (KR); Jaewon Kim, Yongin-si (KR); Doori Oh, Yongin-si (KR); Yookyung Kim, Yongin-si (KR); Narae Kim, Yongin-si (KR); and Banseok Lee, Yongin-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Oct. 24, 2023, as Appl. No. 18/383,082.
Claims priority of application No. 10-2023-0087378 (KR), filed on Jul. 5, 2023.
Prior Publication US 2025/0023034 A1, Jan. 16, 2025
Int. Cl. H01M 4/38 (2006.01); H01M 4/36 (2006.01); H01M 4/583 (2010.01); H01M 4/62 (2006.01); 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 4/583 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); H01M 10/44 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A negative active material, comprising:
a core comprising a silicon-carbon composite; and
a polymer coating layer on the core,
wherein the negative active material has about 1.02 to about 1.6 of a ratio of height of N1s peak occurring at about 400±about 0.5 eV relative to a height of N1s peak occurring at about 405±about 0.5 eV of a bonding energy, and about 1.02 to about 3.0 of a ratio of a height of a C1s peak occurring at about 286.5±about 0.5 eV relative to a height of C1s peak occurring at about 290±about 0.5 eV when an X-ray photoelectron spectroscopy is measured.