US 12,034,157 B2
Sulfur-doped silicon negative electrode material, method for producing same, lithium secondary battery negative electrode including negative electrode material, and lithium secondary battery comprising negative electrode
Jangbae Kim, Daejeon (KR); Soojin Park, Pohang-si (KR); Jaegeon Ryu, Pohang-si (KR); Jonghyun Chae, Daejeon (KR); and Jihye Yang, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR); and POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION, Pohang-si (KR)
Appl. No. 17/285,316
Filed by LG CHEM, LTD., Seoul (KR); and POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION, Pohang-si (KR)
PCT Filed Mar. 6, 2020, PCT No. PCT/KR2020/003204
§ 371(c)(1), (2) Date Apr. 14, 2021,
PCT Pub. No. WO2020/184917, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10-2019-0027137 (KR), filed on Mar. 8, 2019; and application No. 10-2020-0028206 (KR), filed on Mar. 6, 2020.
Prior Publication US 2021/0328214 A1, Oct. 21, 2021
Int. Cl. H01M 4/00 (2006.01); C01B 33/023 (2006.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/386 (2013.01) [C01B 33/023 (2013.01); H01M 4/134 (2013.01); C01P 2002/54 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2006/16 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 10/0525 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A sulfur-doped silicon negative electrode material which has an internal pore channel having an average width of 500 nm to 3 μm and has an average external diameter of 1 μm to 5 μm,
wherein the sulfur-doped silicon negative electrode material consists of silicon and sulfur seeds and has a structure in which silicon and sulfur seeds are agglomerated with each other in a mixed state, and
wherein the sulfur-doped silicon negative electrode material has an electrical conductivity of 1 S/m to 6 S/m.