Patent ID: 11901512
Assignee: FORSCHUNGSZENTRUM JüLICH GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. A method of using an electrolyte in a rechargeable lithium battery at a voltage above 4.2 V, the method comprising:
providing the electrolyte comprising,
at least one lithium salt,
at least one first organic solvent having a dielectric constant of >90 at 40° C.,
at least one second organic solvent having a boiling point of <110° C., and
at least one phosphite having the formula (I), wherein,
R1 is a completely or partially halogen-substituted, linear or branched, C2-C20 alkyl group, and
R2, R3, R4, and R5 are each selected, independently of one other, from H, or an unsubstituted or completely or partially halogen-substituted, linear or branched, C1-C20 alkyl group;

providing the electrolyte as a part of the rechargeable lithium battery; and
using the electrolyte in the rechargeable lithium battery at the voltage above 4.2 V.