Abstract: Provided is a non-aqueous electrolyte including a lithium salt, an organic solvent, a compound represented by Formula 1 as a first additive, and a compound represented by Formula 2 as a second additive: wherein in Formulae 1 and 2, all the variables are described herein.

Abstract: Provided is a non-aqueous electrolyte including a lithium salt, an organic solvent, a compound represented by Formula 1 as a first additive, and a compound represented by Formula 2 or Formula 3 as a second additive: wherein all the variables are described herein.

Abstract: Provided is a lithium secondary battery comprising: a positive electrode comprising a lithium nickel cobalt manganese-based oxide as a positive electrode active material; a negative electrode comprising a negative electrode active material composed of Si; and a non-aqueous electrolyte comprising a lithium salt, an organic solvent and an additive, wherein the organic solvent comprises a compound of Formula 1 and fluoroethylene carbonate, and the compound of Formula 1 is comprised in greater than 15 wt % on the basis of the total of the non-aqueous electrolyte: wherein all the variables are described herein.

Abstract: A non-aqueous electrolyte solution has improved high-temperature stability and high-temperature durability and a lithium secondary battery including the same. The non-aqueous electrolyte solution may include a lithium salt; a non-aqueous organic solvent; and a compound represented by Formula 1 of a specific structure: wherein R1 and R2 are described herein.

Abstract: Provided is a non-aqueous electrolyte including a lithium salt and an organic solvent, wherein the organic solvent includes a compound represented by Formula 1 in an amount of 25 wt % to 80 wt % based on the total non-aqueous electrolyte: [Formula 1] wherein, in Formula 1, R1 and R2 may each independently be any one selected from the group consisting of hydrogen (H), an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, and an aryl group having 6 to 20 carbon atoms, and X may be a perfluoroalkyl group having 1 to 5 carbon atoms.

Abstract: Provided is a non-aqueous electrolyte comprising a lithium salt; an organic solvent; and a compound represented by Formula 1 as an additive: wherein in Formula 1, R1 may be an alkyl group having 1 to 5 carbon atoms and optionally being substituted with fluorine, an aryl group having 6 to 8 carbon atoms and optionally being substituted with fluorine, or a nitrile group; and R2 to R4 are each independently an alkyl group having 1 to 5 carbon atoms.

Abstract: A non-aqueous electrolyte includes an organic solvent, a compound represented by Formula 1 as a first additive, and a compound represented by Formula 2 or Formula 3 as a second additive: in the formulas, R and R1 to R6 are as defined in the specification.

Abstract: A lithium secondary battery includes: a negative electrode including a silicon-based negative electrode active material; a positive electrode; a separator; and a non-aqueous electrolyte. The non-aqueous electrolyte contains: a lithium salt; an organic solvent; a compound of Formula 1 as a first additive; and a compound of Formula 2 as a second additive. Here, R is an alkylene group with 1 to 5 carbon atoms, which is substituted with fluorine, and R1 to R3 are each independently any one selected from the group consisting of H, an alkyl group with 1 to 5 carbon atoms, and a nitrile group. Here, R4 to R7 are each independently any one selected from the group consisting of an alkyl group with 1 to 10 carbon atoms, which is substituted with fluorine, and an alkenyl group with 2 to 10 carbon atoms, which is substituted with fluorine.

Abstract: A lithium secondary battery includes a negative electrode, a positive electrode positioned opposite to the negative electrode, a separator disposed between the negative electrode and the positive electrode, and a non-aqueous electrolyte, wherein the negative electrode includes a silicon-based active material, the silicon-based active material comprises a compound represented by SiOx, wherein 0?x<2, the non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, the additive includes a first additive and a second additive, the first additive includes a coumarin-based compound represented by Formula 1, and the second additive includes at least one of lithium fluoromalonato(difluoro)borate (LiFMDFB), lithium difluoro(oxalato)borate (LiDFOB), lithium difluorophosphate (LiDFP), or lithium difluorobis-(oxalate)phosphate (LiDFOP): wherein R and n are described herein.

Abstract: A non-aqueous electrolyte solution has improved high-temperature stability and high-temperature durability and a lithium secondary battery including the same. The non-aqueous electrolyte solution may include a lithium salt; a non-aqueous organic solvent; and a compound represented by Formula 1 of a specific structure: wherein R1 and R2 are described herein.

Abstract: The present disclosure provides a non-aqueous electrolyte including a lithium salt, an organic solvent, a compound represented by Formula 1 as a first additive, and a polymer including a repeating unit represented by Formula 2-1, Formula 2-2, and Formula 2-3 as a second additive: all the variables are described herein.

Abstract: The present disclosure provides a non-aqueous electrolyte including an additive including a repeating unit represented by Formula 1 and a repeating unit represented by Formula 2 below: wherein X, R, R1 and R2 are described herein.

Abstract: The present disclosure provides a non-aqueous electrolyte including an additive including a repeating unit represented by Formula 1 and a repeating unit represented by Formula 2 below: wherein X, R, R1 and R2 are described herein.

Abstract: The present disclosure provides a non-aqueous electrolyte including an additive for a non-aqueous electrolyte represented by the following Chemical Formula 1: wherein, A ring may be a cyclic phosphate group having 2 or 3 carbon atoms, R may be an alkylene group or alkenylene group having 1 to 5 carbon atoms, and X may be a perfluoroalkyl group having 1 to 5 carbon atoms.

Abstract: The present disclosure provides a non-aqueous electrolyte including a lithium salt, an organic solvent, a compound represented by Formula 1 as a first additive, and a polymer including a repeating unit represented by Formula 2-1, Formula 2-2, and Formula 2-3 as a second additive: all the variables are described herein.