US 11,876,229 B2
Negative electrode and lithium secondary battery including the same
Ji-Won Min, Daejeon (KR); Seok-Koo Kim, Daejeon (KR); Joon Kwon, Daejeon (KR); Sun-Kyu Kim, Daejeon (KR); Ju-Ri Kim, Daejeon (KR); and Kyung-Eun Sun, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/274,590
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jan. 28, 2020, PCT No. PCT/KR2020/001304
§ 371(c)(1), (2) Date Mar. 9, 2021,
PCT Pub. No. WO2020/159202, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10-2019-0010797 (KR), filed on Jan. 28, 2019.
Prior Publication US 2022/0052345 A1, Feb. 17, 2022
Int. Cl. H01M 4/62 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/1395 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/62 (2013.01) [H01M 4/0404 (2013.01); H01M 4/0471 (2013.01); H01M 4/134 (2013.01); H01M 4/1395 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A negative electrode comprising:
a current collector;
a negative electrode active material layer disposed on at least one surface of the current collector, comprising a silicon-based active material and a conductive material, and containing no binder polymer; and
a coating layer disposed on a surface of the negative electrode active material layer and at least a part of inside of pores of the negative electrode active material layer, and containing a coating layer polymer forming a chemical bond with silicon (Si) of the silicon-based active material,
wherein a content of the coating layer polymer is 0.3-2 parts by weight based on 100 parts by weight of the negative electrode active material layer, and
the coating layer polymer comprises a mixture of polyacrylic acid with polyvinyl alcohol.