US 12,476,285 B2
Electrolyte composition for electrochemical cell comprising a lithium anode
Olivier Huchet, Latresne (FR); Julien Demeaux, Bruges (FR); and Michael Carriquiry, Bordeaux (FR)
Assigned to SAFT, Levallois-Perret (FR)
Appl. No. 17/627,178
Filed by SAFT, Levallois-Perret (FR)
PCT Filed Jul. 9, 2020, PCT No. PCT/EP2020/069344
§ 371(c)(1), (2) Date Jan. 14, 2022,
PCT Pub. No. WO2021/013559, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 1908412 (FR), filed on Jul. 24, 2019.
Prior Publication US 2022/0285734 A1, Sep. 8, 2022
Int. Cl. H01M 10/0569 (2010.01); H01M 10/0525 (2010.01); H01M 10/0568 (2010.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01)
CPC H01M 10/0569 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 2004/027 (2013.01); H01M 4/134 (2013.01); H01M 2300/0034 (2013.01); H01M 2300/0037 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electrochemical cell comprising:
at least one anode which is lithium metal or a lithium alloy,
at least one cathode, and
an electrolyte composition comprising:
a) a solvent consisting of 30% to 40% by weight of propylene carbonate (PC), monofluoroethylene carbonate (FEC) in a percentage of at most 1.5% by weight, 5% to 10% by weight of tetrahydrofuran (THF) and 50% to 60% by weight of 1,3-dioxolane (DIOX);
b) at least one lithium salt other than lithium difluorophosphate LiPO2F2, and
c) lithium difluorophosphate in an amount representing from 0.1% to 1% by weight relative to a sum of weight of the solvent and weight of said at least one lithium salt,
wherein a cathode active material is selected from the group consisting of MnO2, CFx with x≤1, FeS2, V2O5, I2 and a mixture thereof.