公开(公告)号：US20240243364A1

公开(公告)日：2024-07-18

申请号：US18554350

申请日：2022-04-05

Applicant: Solvay SA

Inventor： Ji-Ae Choi ,  Eun-ji Moon ,  Jong-Hyun Lee ,  Ji-Hye Won ,  Hyung-Kwon Hwang

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/131 ,  H01M4/133 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M4/131 ,  H01M4/133 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0034

Abstract: The present invention pertains to a liquid electrolyte for lithium secondary batteries comprising: a) at least one fluorinated acyclic diether represented by the formula (I) R1—O—R2—O—R3, wherein R1 and R3 represent a fluorinated straight-chain alkyl group respectively: R2 represents an optionally fluorinated straight-chain alkylene group; and the sum of carbon atoms in R1, R2, and R3 is from 5 to 8, and preferably 6; b) at least one fluorinated acyclic carboxylic acid ester represented by the formula (II) R4—C(O)O—R5, wherein R4 and R5 represent an alkyl group respectively; the sum of carbon atoms of R4 and R5 is from 2 to 7; and at least one hydrogen in R5 is replaced by fluorine; c) at least one organic carbonate; and d) at least one lithium salt. The present invention also relates to a lithium secondary battery comprising an anode, a cathode, a separator and a liquid electrolyte according to the present invention.