US 12,191,483 B2
Positive electrode active material comprising sulfur-carbon composite and lithium-sulfur secondary battery comprising the same
Min-Su Kim, Daejeon (KR); Da-Young Kang, Daejeon (KR); Bong-Soo Kim, Daejeon (KR); and Seung-Bo Yang, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed on Nov. 24, 2023, as Appl. No. 18/518,749.
Application 18/518,749 is a continuation in part of application No. 18/244,083, filed on Sep. 8, 2023, abandoned.
Claims priority of application No. 10-2022-0159965 (KR), filed on Nov. 25, 2022; application No. 10-2022-0183586 (KR), filed on Dec. 23, 2022; application No. 10-2022-0183771 (KR), filed on Dec. 23, 2022; application No. 10-2022-0185613 (KR), filed on Dec. 27, 2022; application No. 10-2023-0063394 (KR), filed on May 16, 2023; application No. 10-2023-0070299 (KR), filed on May 31, 2023; application No. 10-2023-0073163 (KR), filed on Jun. 7, 2023; and application No. 10-2023-0075765 (KR), filed on Jun. 13, 2023.
Prior Publication US 2024/0178381 A1, May 30, 2024
Int. Cl. H01M 4/38 (2006.01); H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/583 (2010.01)
CPC H01M 4/382 (2013.01) [H01M 4/362 (2013.01); H01M 4/583 (2013.01); H01M 2004/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A positive electrode active material for a lithium-sulfur battery, comprising:
a sulfur-carbon composite,
wherein the sulfur-carbon composite comprises a porous carbon material and a sulfur-based material disposed on at least a portion of an inside of pores and a surface of the porous carbon material,
wherein the sulfur-based material comprises at least one of sulfur (S8) or a sulfur compound, and
wherein the porous carbon material satisfies one or more of the following conditions:
(1) a sum of particle size D10 and particle size D90 is 30 μm or more and 60 μm or less; and
(2) a broadness factor (BF) satisfying Equation 1 is 7 or less:
Broadness factor (BF)=(particle size D90 of the porous carbon material)/(particle size D10 of the porous carbon material)  [Equation 1].