US 12,278,373 B2
Sulfur-carbon composite, and cathode for lithium secondary battery and lithium secondary battery which comprise same
Soohyun Kim, Daejeon (KR); and Bong Soo Kim, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/431,216
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed May 29, 2020, PCT No. PCT/KR2020/006964
§ 371(c)(1), (2) Date Aug. 16, 2021,
PCT Pub. No. WO2020/251199, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 10-2019-0070378 (KR), filed on Jun. 14, 2019.
Prior Publication US 2022/0115662 A1, Apr. 14, 2022
Int. Cl. H01M 4/38 (2006.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 4/58 (2010.01); H01M 4/60 (2006.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 10/36 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/625 (2013.01) [H01M 4/0402 (2013.01); H01M 4/366 (2013.01); H01M 4/38 (2013.01); H01M 4/5815 (2013.01); H01M 4/602 (2013.01); H01M 4/622 (2013.01); H01M 4/628 (2013.01); H01M 10/052 (2013.01); H01M 10/36 (2013.01); H01M 2004/021 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A sulfur-carbon composite, comprising:
a porous carbon material; and
sulfur present in at least a portion of an interior and a surface of the porous carbon material;
wherein the porous carbon material is coated with a thiophene-based polymer doped with a dopant prior to mixing with sulfur,
wherein a pH of the thiophene-based polymer doped with the dopant is 4 to 7, and
wherein the thiophene-based polymer doped with a dopant is not coated on the surface of sulfur.