US 12,148,891 B2
Polymer electrolyte for lithium secondary battery and lithium secondary battery including the same
Myung Soo Park, Daejeon (KR); Seong Jin Park, Daejeon (KR); Hyeon Jin Go, Daejeon (KR); Seung Hwan Lee, Daejeon (KR); Han Sol Lee, Daejeon (KR); Myoung Lae Kim, Daejeon (KR); and Hong Won Lee, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR); and SK INNOVATION CO., LTD., Seoul (KR)
Filed by SK ON CO., LTD., Seoul (KR); and SK INNOVATION CO., LTD., Seoul (KR)
Filed on Dec. 28, 2023, as Appl. No. 18/399,460.
Claims priority of application No. 10-2022-0187867 (KR), filed on Dec. 28, 2022.
Prior Publication US 2024/0266614 A1, Aug. 8, 2024
Int. Cl. H01M 10/42 (2006.01); H01M 10/0565 (2010.01); H01M 50/383 (2021.01)
CPC H01M 10/4235 (2013.01) [H01M 10/0565 (2013.01); H01M 50/383 (2021.01); H01M 2300/0082 (2013.01)] 18 Claims
 
1. A polymer electrolyte for a lithium secondary battery comprising:
a fluorine-based solvent;
a lithium salt; and
a flame retardant polymer comprising phosphorus and fluorine,
wherein the polymer electrolyte has a fluorine content of 35 to 60% by weight and a phosphorus content of 2.3 to 7.5% by weight, and
wherein the flame retardant polymer comprises an aromatic ring or a fluorinated phosphazene.