US 12,249,718 B2
Negative electrode and secondary battery including negative electrode
Tae Gon Kim, Daejeon (KR); Ki Won Sung, Daejeon (KR); Wang Mo Jung, Daejeon (KR); Sin Young Park, Daejeon (KR); Dae Jin Lee, Daejeon (KR); Bo Ram Lee, Daejeon (KR); and Hak Yoon Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/435,820
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Mar. 9, 2020, PCT No. PCT/KR2020/003269
§ 371(c)(1), (2) Date Sep. 2, 2021,
PCT Pub. No. WO2020/184938, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10-2019-0027162 (KR), filed on Mar. 8, 2019; and application No. 10-2019-0123302 (KR), filed on Oct. 4, 2019.
Prior Publication US 2022/0158192 A1, May 19, 2022
Int. Cl. H01M 4/62 (2006.01); H01M 4/48 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/625 (2013.01) [H01M 4/48 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A negative electrode comprising a negative electrode active material layer,
wherein the negative electrode active material layer includes a negative electrode active material and a conductive material,
wherein the negative electrode active material includes SiOx (0≤x<2) particles, and
the conductive material includes:
secondary particles comprise a plurality of graphene sheets arranged in different directions, wherein a portion of a graphene sheet is connected to a portion of an adjacent graphene sheet; and
a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded side by side in a single plane and,
wherein an oxygen content of the secondary particles is 1 wt % to 10 wt % based on a total weight of the secondary particles, and
a specific surface area of the secondary particles measured by a nitrogen adsorption BET method is 500 m2/g to 1100 m2/g.