公开(公告)号：US20220021026A1

公开(公告)日：2022-01-20

申请号：US17312421

申请日：2019-12-11

Applicant: SOLVAY SA

Inventor： Guillaume MÜLLER ,  Lawrence Alan HOUGH ,  Hyun-Cheol LEE ,  So-young LEE ,  Ji-Hye WON

IPC: H01M10/0565 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0567

Abstract: A gel polymer electrolyte for a lithium electrochemical cell, comprising: a) a three-dimensional cross-linked polymer network within a liquid electrolyte obtained by forming a reaction product of at least one fluorinated copolymer with at least one isocyanate compound comprising at least two isocyanate functional groups, and b) a liquid electrolyte solution included in the polymer network a), wherein the fluorinated copolymer comprises: i) at least one first recurring unit derived from at least one ethylenically unsaturated fluorinated monomer; and ii) at least one second recurring unit derived from at least one ethylenically unsaturated monomer having a hydroxyl group. A process for the manufacture of the gel polymer electrolyte for a lithium electrochemical cell; a lithium electrochemical cell comprising a cathode, an anode, and the present gel polymer electrolyte; and use of the gel electrolyte polymer in a lithium electrochemical cell as a separator and an electrolyte.

公开(公告)号：US20210234199A1

公开(公告)日：2021-07-29

申请号：US17051086

申请日：2019-05-02

Applicant: SOLVAY SA

Inventor： Ji-Hye WON ,  Moon-Hyung CHOI ,  Mi-Soon OH ,  Hyun-Cheol LEE ,  Lawrence Alan HOUGH ,  Hae-Young KIM

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M10/0525

Abstract: This invention relates to a non-aqueous liquid electrolyte composition suitable for secondary battery cells, especially lithium-ion secondary battery cells. Such electrolyte composition comprises a) at least one non-fluorinated cyclic carbonate and at least one fluorinated cyclic carbonate, b) at least one fluorinated acyclic carboxylic acid ester, c) at least one electrolyte salt, d) at least one lithium borate compound, e) at least one cyclic sulfur compound, and f) optionally at least one cyclic carboxylic acid anhydride, all components being present in specific proportions. It can advantageously be used in batteries comprising a cathode material comprising a lithium nickel manganese cobalt oxide (NMC) or a lithium cobalt oxide (LCO), especially at a high operating voltage.