US 12,132,172 B2
Electrolyte for lithium-metal battery having improved stability
Ji Yong Lee, Seongnam-si (KR); Jong Chan Song, Suwon-si (KR); Nam Soon Choi, Ulsan (KR); Won Joon Lee, Ulsan (KR); Sae Hun Kim, Ulsan (KR); Min Young Lee, Ulsan (KR); and Young Joon Ahn, Ulsan (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY, Ulsan (KR)
Filed on Nov. 30, 2021, as Appl. No. 17/538,866.
Claims priority of application No. 10-2020-0172958 (KR), filed on Dec. 11, 2020.
Prior Publication US 2022/0190388 A1, Jun. 16, 2022
Int. Cl. H01M 10/00 (2006.01); H01M 10/0567 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 10/0569 (2013.01) [H01M 10/0567 (2013.01); H01M 2300/0042 (2013.01); H01M 2300/0057 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electrolyte, comprising:
an organic solvent;
a cosolvent, wherein the cosolvent is different from the organic solvent and comprises a fluorine-based compound; and
an additive having a lower lowest unoccupied molecular orbital (LUMO) value than the organic solvent,
wherein the additive comprises difluorophosphate (LiPO2F2),
wherein the organic solvent comprises 1,2-dimethoxyethane,
wherein the cosolvent comprises 1,1,2,2-tetraflouroethyl-1H, 1H,5H-octafluoropentyl ether (TFOFE), and
wherein a volume ratio of the organic solvent and the cosolvent is 5:5 to 9:1.