US 11,728,488 B2
Negative electrode for lithium secondary battery and lithium secondary battery comprising same
Inoh Cha, Yongin-si (KR); Deok-Hyun Kim, Yongin-si (KR); and Jinhee Lee, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Sep. 8, 2022, as Appl. No. 17/930,714.
Application 17/930,714 is a continuation of application No. 16/753,319, granted, now 11,444,283, previously published as PCT/KR2018/009850, filed on Aug. 27, 2018.
Claims priority of application No. 10-2017-0147446 (KR), filed on Nov. 7, 2017.
Prior Publication US 2023/0028390 A1, Jan. 26, 2023
Int. Cl. H01M 4/66 (2006.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/661 (2013.01) [H01M 4/366 (2013.01); H01M 4/623 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A negative electrode for a lithium secondary battery, the negative electrode comprising:
a current collector; and
a negative electrode active material layer on the current collector,
wherein the negative electrode active material layer comprises a first active material layer including a first active material and a first binder, and a second active material layer on the first active material layer and including a second active material and a second binder,
wherein a content of the first binder is greater than a content of the second binder,
wherein the negative electrode has an active mass density of 1.20 g/cc to 1.80 g/cc: and
wherein an average particle size (D50) of the first active material is larger than an average particle size (D50) of the second active material.