US 12,456,726 B2
Negative electrode active material, and negative electrode and secondary battery including the same
Jung Hyun Choi, Daejeon (KR); Hang Ah Park, Daejeon (KR); Sun Young Shin, Daejeon (KR); Je Young Kim, Daejeon (KR); and Yong Ju Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/790,620
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jan. 27, 2021, PCT No. PCT/KR2021/001085
§ 371(c)(1), (2) Date Jul. 1, 2022,
PCT Pub. No. WO2021/153987, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10-2020-0010814 (KR), filed on Jan. 30, 2020.
Prior Publication US 2023/0092951 A1, Mar. 23, 2023
Int. Cl. H01M 4/38 (2006.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 4/60 (2006.01); H01M 10/052 (2010.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01)
CPC H01M 4/386 (2013.01) [H01M 4/0404 (2013.01); H01M 4/366 (2013.01); H01M 4/587 (2013.01); H01M 4/602 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 4/134 (2013.01); Y02E 60/10 (2013.01)] 11 Claims
 
1. A negative electrode active material comprising:
a silicon-based core; and
an outer coating layer disposed on the silicon-based core and essentially consisting of polyimide,
wherein the polyimide comprises a fluorine-containing imide unit.