Electrolyte additive and electrolyte including same and rechargeable lithium battery including electrolyte

摘要

Disclosed are an electrolyte additive represented by the following Chemical Formula, an electrolyte including the same, and a rechargeable lithium battery. The electrolyte may have high dissolution capability in a non-aqueous organic solvent and high affinity for the surface of a negative electrode while promoting formation of a passivation film on the surface of a positive electrode and/or a negative electrode.;

主权项

1. An electrolyte additive comprising a compound represented by the following Chemical Formula 1: wherein R1 to R8 are each independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C3 to C30 cycloalkyl group, C1 to C30 haloalkyl group, a substituted or unsubstituted C26 to C30 aryl group, a substituted or unsubstituted C6 to C30 halogenated aryl group, a substituted or unsubstituted C3 to C30 cycloalkenyl group, a substituted or unsubstituted C7 to C20 an arylalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C2 to C30 heterocycloalkyl group, a substituted or unsubstituted C2 to C30 heteroaryl group, a substituted or unsubstituted C2 to C30 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, a substituted or unsubstituted C1 to C20 aldehyde group, a substituted or unsubstituted amino group, a halogen, a cyano group, a nitric acid group, or a combination thereof, and at least one of R1 to R8 is a fluoroaryl group.