Abstract: The present invention discloses a copolymer for a polymer electrolyte, and a gel polymer electrolyte and a lithium secondary battery which include the same. Specifically, the present invention discloses a copolymer for a polymer electrolyte, which includes (A) a fluorine-based polymer, and (B) a unit derived from an acrylate-based monomer or an acrylate-based polymer, wherein the unit derived from the acrylate-based monomer or the acrylate-based polymer is grafted on the fluorine-based polymer, and a weight ratio of the fluorine-based polymer to the unit derived from the acrylate-based monomer or the acrylate-based polymer is in a range of 1:99 to 40:60, and a gel polymer electrolyte in which lithium ion transfer capability is improved by including the same. Also, the present invention may prepare a lithium secondary battery in which high-temperature safety is improved by including the gel polymer electrolyte.

Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery, which includes an oligomer represented by Formula 1, a lithium salt, and an organic solvent, and a lithium secondary battery including the same.

Abstract: A lithium secondary battery is disclosed herein. In some embodiments, a lithium secondary battery includes a positive electrode including a lithium transition metal oxide represented by Formula 1, a negative electrode, a non-aqueous electrolyte solution containing a lithium salt, a first non-aqueous solvent, and a second non-aqueous solvent, and a separator, wherein the first non-aqueous solvent is a carbonate-based organic solvent, the second non-aqueous solvent is a fluorine-based organic solvent, and a volume ratio of the first non-aqueous solvent to the second non-aqueous solvent is in a range of 5:5 to 9:1.

Abstract: The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery, which may form a robust solid electrolyte interphase (SEI), and a lithium secondary battery in which battery performance is improved by including the same. Specifically, the non-aqueous electrolyte solution for a secondary battery includes a lithium salt, a non-aqueous organic solvent, a first additive, and a second additive, wherein the non-aqueous electrolyte solution for a secondary battery may include an oligomer including a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2 as the first additive, and may include at least one selected from the group consisting of a nitrile-based compound, a lithium salt compound, and a cyclic carbonate compound as the second additive.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery capable of forming a stable film on the surface of an electrode, and a lithium secondary battery including the same is described. Specifically, the non-aqueous electrolyte solution may include a lithium salt, a non-aqueous organic solvent, and a compound represented by Formula 1: wherein R, R1, and X are described herein.

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

Abstract: The present invention discloses a copolymer for a polymer electrolyte, and a gel polymer electrolyte and a lithium secondary battery which include the same. Specifically, the present invention discloses a copolymer for a polymer electrolyte, which includes a fluorine-based polymer main chain and a unit derived from an acrylate-based monomer or an acrylate-based polymer containing an ion conductive functional group grafted to the fluorine-based polymer main chain, and a gel polymer electrolyte in which lithium ion transfer capability is improved by including the same. Also, the present invention may prepare a lithium secondary battery with enhanced high-temperature safety by including the gel polymer electrolyte.

Abstract: Provided are a method of manufacturing a negative electrode for a lithium secondary battery, which includes: preparing a working electrode including a metal thin film; preparing a composition for forming a first solid electrolyte layer including an additive including at least one salt selected from salts represented by Chemical Formula 1 to Chemical Formula 5 and a glyme-based solvent; fabricating a half-cell including the working electrode, a counter electrode, a reference electrode, and the composition for forming a first solid electrolyte layer; forming a first solid electrolyte layer on the working electrode by operating the half-cell; and separating the working electrode on which the first solid electrolyte layer has been formed, and a negative electrode for a lithium secondary battery manufactured by the above-described method.

Abstract: Provided are a non-aqueous electrolyte, which includes an organic solvent containing ethylene carbonate, a non-solvent, and a lithium salt, wherein a degree of freedom A of the ethylene carbonate, which is represented by Equation (1), is 30% or less, and a lithium secondary battery including the same-: A={Pfree-EC/(Pfree-EC+PCoordination-EC)}×100??Equation (1): wherein in Equation (1), A is the degree of freedom of the ethylene carbonate, Pfree-EC is an integrated area of a graph which is obtained by deconvolution of a Raman spectrum of the electrolyte with a Gaussian function based on a peak at 893 cm?1, and PCoordination-EC is an integrated area of a graph which is obtained by deconvolution of the Raman spectrum of the electrolyte with a Gaussian function based on a peak at 903 cm?1.

Abstract: The present invention provides a method of preparing an electrode for a lithium secondary battery which includes forming a first electrolyte layer by immersing an electrode current collector in a composition for forming the first electrolyte layer and applying a current, and forming a second electrolyte layer by immersing the electrode current collector having the first electrolyte layer formed thereon in a composition for forming the second electrolyte layer and applying a current, wherein one of the composition for forming the first electrolyte layer and the composition for forming the second electrolyte layer is a composition for forming an organic electrolyte layer, and another one is a composition for forming an inorganic electrolyte layer, and the composition for forming an inorganic electrolyte layer includes a compound represented by Formula 1.

Abstract: An electrolyte solution additive for a lithium secondary battery, a non-aqueous electrolyte solution for a lithium secondary battery comprising the same, and a lithium secondary battery are described. Specifically, the electrolyte solution additive for a lithium secondary battery may comprise a compound represented by Formula 1, wherein in Formula 1, R1 to R3, L and n are described herein.

Abstract: A lithium secondary battery with improved high-temperature storage characteristics and high-temperature cycle characteristics is described. Such lithium secondary battery includes a positive electrode, a negative electrode including a silicon-based negative electrode active material, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte solution containing a lithium salt, an organic solvent, and an additive, wherein the additive may include a compound represented by Formula 1, wherein, in Formula 1, R1 to R3 are described herein.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery includes a compound represented by Formula 1 as follows, a lithium salt, and an organic solvent; and a lithium secondary battery including the same: wherein R1 to R3, L1 and A? are described herein.

Abstract: The present invention relates to a polymer electrolyte for a secondary battery and a lithium secondary battery including the same, and to a polymer electrolyte for a secondary battery, which includes a first polymer including a repeating unit represented by Formula 1, and a second polymer including a repeating unit derived from a monomer having at least one ethylenically unsaturated group or an oligomer thereof, and a lithium secondary battery including the same.

Abstract: An electrolyte solution additive for a lithium secondary battery, a non-aqueous electrolyte solution for a lithium secondary battery comprising the same, and a lithium secondary battery are described. Specifically, the electrolyte solution additive for a lithium secondary battery may comprise a compound represented by Formula 1, wherein in Formula 1, R1 to R3, L and n are described herein.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery comprising an organic solvent; a lithium salt; a first additive which is a compound represented by Formula 1; a second additive which is a compound represented by Formula 2; and a third additive which is one or more selected from the group consisting of vinylene carbonate and vinylethylene carbonate, and a lithium secondary battery comprising the non-aqueous electrolyte solution are described: P[OSi(R1)3]3??[Formula 11 wherein R1 and n are described herein.

Abstract: The present invention relates to a composition for a gel polymer electrolyte and a lithium secondary battery including a gel polymer electrolyte formed therefrom, and particularly, to a composition for a gel polymer electrolyte, which includes a lithium salt, a non-aqueous organic solvent including a glyme-based solvent, an oligomer represented by Formula 1 and having a polymerizable substituent, and a polymerization initiator, and a lithium secondary battery including a gel polymer electrolyte prepared by polymerization of the composition.

Abstract: Disclosed herein is a separator for electrochemical devices, configured to guarantee electrical insulation between a positive electrode and a negative electrode, wherein the separator includes no polyolefin substrate, and includes inorganic particles, a binder for coupling between the inorganic particles, and a crosslinking agent.

Abstract: Disclosed herein is a separator for electrochemical devices, configured to guarantee electrical insulation between a positive electrode and a negative electrode, wherein the separator includes no polyolefin substrate, and includes inorganic particles, a binder for coupling between the inorganic particles, and a crosslinking agent.

Abstract: The present invention relates to a composition for a polymer electrolyte which includes a polymerizable oligomer capable of forming an excellent crosslink during a polymerization reaction. Also, the present invention relates to a polymer electrolyte, which may ensure high oxidation stability and ionic conductivity by using the composition for a polymer electrolyte, and a lithium secondary battery including the same.