Abstract: The present invention relates to an electrolyte composition including a lithium salt; a non-aqueous organic solvent; a compound represented by a specific formula; and a perfluoropolyether oligomer, a gel polymer electrolyte including a polymer network which is formed by a polymerization reaction of the electrolyte composition, and a lithium secondary battery including the same.

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 lithium secondary battery includes a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. The positive electrode includes a positive electrode active material, the positive electrode material includes a lithium transition metal oxide represented by a specific chemical formula, the non-aqueous electrolyte includes a lithium ion, an organic solvent, and an additive, the additive includes a first first additive and a second additive, the first additive includes a phosphate-based additive having a silyl group, and the second additive includes a compound represented by a specific chemical formula.

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 positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. 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 transition metal exceeding about 1, the non-aqueous electrolyte includes a lithium ion, an organic solvent, and an additive, the organic solvent includes a first organic solvent and a second organic solvent, the first organic solvent includes ethylene carbonate, the second organic solvent includes diethyl carbonate and ethyl methyl carbonate, and the additive includes cyclic sulfoxide represented by a specific chemical formula.

Abstract: A lithium secondary battery includes a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. 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 transition metal exceeding about 1, the non-aqueous electrolyte includes a lithium ion and an organic solvent, the organic solvent includes a first organic solvent and a second organic solvent, the first organic solvent includes ethylene carbonate, and the second organic solvent includes diethyl carbonate and propyl propionate.

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 including a negative electrode comprising a carbon material as a negative electrode active material, a positive electrode comprising a positive electrode active material of Formula 2, a separator interposed between the negative electrode and the positive electrode, and a non-aqueous electrolyte comprising a lithium salt; a non-aqueous organic solvent; a first additive represented by Formula 1; and a second additive which is at least one selected from the group consisting of vinylene carbonate and vinylethylene carbonate is described, in Formulas 1 and 2, all the variables are described herein.

Abstract: An electrolyte composition and a lithium secondary battery including the same are disclose herein. The electrolyte composition has improved high temperature safety. In some embodiments, the electrolyte composition includes an additive including a compound represented by Formula 1. Each R1 is independently a single bond, an alkylene group having 1 to 10 carbon atoms, or each R2 is independently a double or triple bond including 2 carbon atoms, each R3 is independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and a is an integer of 1 to 10. The additive may reinforce an SEI layer on the surface of an electrode, thereby having advantages of improved storage and lifetime characteristics at a high temperature and a decreased amount of gas generated in the battery.

Abstract: Disclosed herein relates to a novel non-aqueous electrolyte additive and a lithium secondary battery including the same, wherein the additive for the non-aqueous electrolyte additive can form a film on the surface of the electrode during the activation of the rechargeable battery to prevent a large amount of gas from being generated under high temperature conditions by including an ionic compound represented by Formula 1, and can prevent metal ions from eluting from the electrode to cause a decrease in the OCV and a decrease in the capacity retention rate of the cell, thereby effectively improving the durability, performance and high temperature safety of the cell.

Abstract: Provided here is a lithium secondary battery including a positive electrode comprising an overlithiated manganese-rich oxide containing Mn in an amount of 50 mol % or greater with respect to all metals excluding lithium and having a lithium-to-transition metal molar ratio of greater than 1, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, the additive includes a first additive of Formula 1 and a second additive of Formula 2: wherein 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. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery of the present disclosure may include a lithium salt; a non-aqueous organic solvent; and an oligomer including a repeating unit derived from a monomer represented by Formula 1, a repeating unit derived from a monomer represented by Formula 2, and a repeating unit derived from a monomer represented by Formula 3. Also, the lithium secondary battery of the present disclosure may improve cycle characteristics and high-temperature storage characteristics by including the above non-aqueous electrolyte solution for a lithium secondary battery.

Abstract: The present disclosure relates to an additive for a non-aqueous electrolyte, which includes a compound represented by Formula 1 capable of improving life characteristics of a lithium secondary battery by forming a stable and low-resistance electrode-electrolyte interface even at a high temperature, and a non-aqueous electrolyte and a lithium secondary battery which include the same.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are described herein. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery includes a lithium salt, an organic solvent and a compound represented by Formula 1 to form a robust SEI film, thereby improving battery performance: Wherein R1 to R3 are described herein.

Abstract: An electrolyte additive comprising a compound represented by Formula 1 below forms a coating film on an electrode surface in the activation of a secondary battery, thereby the generation of a large amount of gas under a high temperature condition can be prevented, and a cell OCV drop and a decrease in capacity retention rate, which are caused by elution of metal ions from an electrode, can be effectively prevented, resulting in effective improvement in durability, performance and high-temperature safety of the battery, wherein R1, R2, and M are described herein.

Abstract: Disclosed herein relates to an electrolyte composition and a lithium secondary battery including the same, wherein the electrolyte composition can not only effectively reduce gas generated during charging and discharging of the lithium secondary battery by including one or more electrolyte additives of a chemical compound represented by Formula 1 or a chemical compound represented by Formula 2, but also has the advantage of strengthening the SEI layer on the electrode surface, thereby improving the storage characteristics and life characteristics at high temperatures.

Abstract: An electrolyte composition with improved high temperature safety and a lithium secondary battery including the same is described herein. The electrolyte composition containing a primary additive comprising a compound represented by Formula 1, and specific amount of a secondary additive that contains one or more of cyclic carbonates, can not only reduce the generation of gas during secondary battery charge-discharge, but also improve storage characteristics and the lifespan characteristics under a high temperature condition by strengthening the SEI coating film on the surface of an electrode. wherein all the variables are described herein.

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 for a lithium secondary battery and a lithium secondary battery including the same. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery of the present disclosure may include a lithium salt; a non-aqueous organic solvent; and an oligomer including a repeating unit derived from a monomer represented by Formula 1, a repeating unit derived from a monomer represented by Formula 2, and a repeating unit derived from a monomer represented by Formula 3. Also, the lithium secondary battery of the present disclosure may improve cycle characteristics and high-temperature storage characteristics by including the above non-aqueous electrolyte solution for a lithium secondary battery.

Abstract: The present invention relates to a precursor composition for preparing a polymer electrolyte, and a polymer electrolyte and a secondary battery which are prepared by using the same. The precursor composition for preparing a polymer electrolyte of the present invention includes a lithium salt, a non-aqueous organic solvent, a polymerization initiator, an oligomer represented by Formula 1, and a compound represented by Formula 2, wherein the oligomer represented by Formula 1 and the compound represented by Formula 2 may be included in a weight ratio of 1:0.01 to 1:4.