Abstract: Provided is a lithium secondary battery including a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material and a first additive, the non-aqueous electrolyte includes a lithium salt, an organic solvent, and a second additive, the first additive includes at least one of compounds represented by Formula 1-1 or Formula 1-2, and the second additive includes a cyclic sulfur oxide-based compound: wherein all the variables in Formula 1-1 and Formula 1-2 are as described herein.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt at a concentration of 1.5 M to 2.0 M, an organic solvent containing ethylene carbonate and ethyl propionate, and a first additive represented by Formula 1, wherein the ethylene carbonate and the ethyl propionate are present in a volume ratio of 1:9 to 1.5:8.5: NC—R—CH?CH—R1—CN??[Formula 1] In Formula 1, R and R1 are each independently a substituted or unsubstituted alkylene group having 1 to 5 carbon atoms.

Abstract: Provided are a non-aqueous electrolyte solution for a lithium secondary battery, which includes a compound represented by Formula 1, a lithium salt, and an organic solvent; and a lithium secondary battery including the same: wherein all the variables are described herein.

Abstract: A non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, wherein the additive includes a compound represented by Formula 1 below, and such non-aqueous electrolyte may be excellent in electrode film protection and an O2 scavenging effect, so that cycle properties and resistance properties of a lithium secondary battery including the non-aqueous electrolyte may be simultaneously improved, and the amount of gas generation may be significantly reduced: all the variables are described herein.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution comprises a lithium salt, an organic solvent containing a carbonate compound and a propionate compound, and an additive containing 1,4-dicyano-2-butene and 1,3,5-cyclohexanetricarbonitrile, wherein a volume ratio of the carbonate compound to the propionate compound is 10:90 to 40:60, and wherein a weight ratio of the 1,4-dicyano-2-butene to the 1,3,5-cyclohexanetricarbonitrile is 1:1.5 to 1:3.7.

Abstract: The present invention relates to a compound capable of lowering the flammability of a non-aqueous electrolyte when included in the non-aqueous electrolyte and improving the life properties of a battery by forming an electrode-electrolyte interface which is stable at high temperatures and low in resistance, and relates to a compound represented by Formula I descried herein, a non-aqueous electrolyte solution and a lithium secondary battery both including the compound, n, m, Ak, and X are described herein.

Abstract: A non-aqueous electrolyte includes a lithium, an organic solvent, and an additive. The additive includes a compound having a cyclic borate-based substituent and an oxazolidone-based matrix substituted with a fused ring, so that a lithium secondary battery applying the same has improved high-temperature cycle characteristics and high-temperature storage characteristics, thereby improving overall performance.

Abstract: A non-aqueous electrolyte includes a lithium, an organic solvent, and an additive. The additive includes a compound having a cyclic borate-based substituent and an oxazolidinedione-based matrix, so that a lithium secondary battery applying the same has improved high-temperature cycle characteristics and high-temperature storage characteristics, thereby improving overall performance.

Abstract: The present disclosure relates to a lithium secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and a non-aqueous electrolyte. The non-aqueous electrolyte includes an organic solvent, a lithium salt, a coumarin-based compound represented by [Chemical Formula 1], and a halogen-substituted cyclic carbonate, and the positive electrode active material includes a lithium manganese-rich oxide represented by [Chemical Formula 2].

Abstract: The present disclosure relates to a non-aqueous electrolyte for a lithium secondary battery, including a lithium salt, an organic solvent and a compound represented by Chemical Formula 1; and a lithium secondary battery including the same, wherein R1, R2, L and m are described herein.

Abstract: Provided is a non-aqueous electrolyte including a lithium salt, an organic solvent, and an additive, wherein the additive includes a compound represented by the following Formula 1: wherein in Formula 1 above, R1 is an allyl group or a propargyl group; R2, R3, R4 and R5 are each independently selected from hydrogen and or an alkyl group having 1 to 5 carbon atoms; L is a single bond or an alkylene group having 1 to 10 carbon atoms; and X is —C(?O)—, —S(?O)— or —S(?O)2—.

Abstract: Provided is a lithium secondary battery including a positive electrode; a negative electrode; a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material, the positive electrode material includes a perlithium manganese-rich oxide containing about 50 mol % or more of Mn based on all metal elements excluding lithium, and having a molar ratio of lithium to all transition metals exceeding about 1, and the non-aqueous electrolyte includes a lithium salt, a compound represented by Chemical Formula 1 and a compound represented by Chemical Formula 2: wherein all the variables are described herein.

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: The present disclosure relates to a lithium secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and a non-aqueous electrolyte. The non-aqueous electrolyte includes an organic solvent, a lithium salt, a coumarin-based compound represented by [Chemical Formula 1], and a halogen-substituted cyclic carbonate, and the positive electrode active material includes a lithium manganese-rich oxide represented by [Chemical Formula 2].

Abstract: The present invention relates to a non-aqueous electrolyte solution additive capable of improving lifespan characteristics of a lithium secondary battery by forming a solid-electrolyte interphase that is stable even at a high temperature and has low resistance when applied to a non-aqueous electrolyte solution, and relates to a non-aqueous electrolyte solution additive including a sultone-based compound represented by Formula I, a non-aqueous electrolyte solution including the same, and a lithium secondary battery.

Abstract: A non-aqueous electrolyte includes: a lithium salt; an organic solvent; and an additive, wherein the additive includes a compound represented by Formula 1 below, and such non-aqueous electrolyte may have excellent effects of film protection, O2 scavenging, and HF scavenging of the electrodes, and thus may improve cycle characteristics and high-temperature storage characteristics of the lithium secondary battery including the non-aqueous electrolyte: all the variables are described herein.

Abstract: A non-aqueous electrolyte may include: a lithium salt; an organic solvent; and an additive, wherein the additive includes a compound represented by Formula 1 below, and such non-aqueous electrolyte may have effects of film protection and HF scavenging of the electrodes, and thus may improve cycle characteristics and high-temperature storage characteristics of the lithium secondary battery including the non-aqueous electrolyte: all the variables are described herein.

Abstract: A non-aqueous electrolyte comprises a lithium salt, an organic solvent, and an additive, wherein the additive includes a compounds represented by Formula 1, and such non-aqueous electrolyte may be capable of suppressing the degradation of the positive electrode, reducing side reactions between the positive electrode and the electrolyte, and forming a stable SEI film on the negative electrode, thereby improving high-temperature cycle properties and high-temperature storage properties: wherein all the variables are described herein.

Abstract: A non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, wherein the additive includes a compound represented by Formula 1 below, and such non-aqueous electrolyte may be excellent in electrode film protection and an O2 scavenging effect, so that cycle properties and resistance properties of a lithium secondary battery including the non-aqueous electrolyte may be simultaneously improved: all the variables are described herein.

Abstract: Provided are a non-aqueous electrolyte solution for a lithium secondary battery, which includes a compound represented by Formula 1, a lithium salt, and an organic solvent; and a lithium secondary battery including the same: wherein the variables are described herein.