Abstract: Provided is a lithium secondary battery including a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material comprising lithium iron phosphate particles, and the positive electrode has a loading amount of 450 mg/25 cm2 to 740 mg/25 cm2, and the non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, wherein the organic solvent includes ethylene carbonate, and dimethyl carbonate, and the dimethyl carbonate is included in 5 vol % to 75 vol % in the organic solvent, and the additive contains vinylene carbonate, and the weight ratio of the vinylene carbonate to the dimethyl carbonate is greater than 0 to 0.2 or less.

Abstract: The present disclosure relates to a lithium secondary battery in which an abnormal voltage drop phenomenon is improved. The lithium secondary battery comprises a negative electrode comprising a negative electrode active material, a positive electrode comprising a positive electrode active material represented by Formula 1, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution comprises a lithium salt, a non-aqueous organic solvent, a compound represented by Formula 2 as a first additive, and lithium difluorophosphate as a second additive: LiaNixCOyM1zM2wO2??[Formula 1] wherein all the variables are described herein.

Abstract: Provided is a non-aqueous electrolyte solution for a lithium secondary battery containing a lithium salt, an organic solvent and a phosphoric acid-based additive of Formula 1 below, which significantly improves the high temperature stability of the lithium secondary battery: wherein R is 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, an organic solvent, and a phosphoric acid-based additive represented by Formula 1 below, which improves the high temperature stability in a lithium secondary battery: wherein R is described herein.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery according to the present technology includes: a lithium salt; an organic solvent; and a first additive, and the first additive includes a compound represented by following Chemical formula 1: Herein, R1 is a substituted or unsubstituted unsaturated hydrocarbon group having 2 to 20 carbon atoms, and R2 is one selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms and a substituted or unsubstituted cyclic alkyl group having 3 to 8 carbon atoms.

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.

Abstract: The present disclosure provides a non-aqueous electrolyte including an additive for a non-aqueous electrolyte represented by Formula 1 below: wherein, R1 to R5 may each independently be any one selected from the group consisting of H, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, and a nitrile group.

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, an organic solvent and a phosphoric acid-based additive represented by Formula 1 below, which improves the high temperature stability in a lithium secondary battery: wherein R is described herein.

Abstract: A non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte for a lithium secondary battery includes an organic solvent, a lithium salt, and a compound represented by Formula 1. In some embodiments, the compound represented by Formula 1 is present in an amount of 0.5 part by weight to 5 parts by weight based on 100 parts by weight of the non-aqueous electrolyte.

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, an organic solvent, and a phosphoric acid-based additive-represented by Formula 1 below, which improves the high temperature stability in a lithium secondary battery: wherein R is described herein.

Abstract: An electrolyte for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, an electrolyte for a lithium secondary battery includes a lithium salt, a non-aqueous solvent containing a fluorine-based organic solvent, and a fluorine-based compound represented by Formula 1. In some embodiments, a lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed therebetween, and the electrolyte.

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: The present invention provides a separation membrane for a lithium secondary battery and a lithium secondary battery including the same, the separation membrane including: a substrate; a first coating layer containing a first organic binder which is able to be bonded to a gel polymer electrolyte through an epoxy ring-opening reaction; and a second coating layer containing a second organic binder, wherein the first organic binder has a functional group capable of ring-opening reaction with an epoxy group, or a combination thereof, and the gel polymer electrolyte is formed by polymerizing an oligomer having an epoxy group, a functional group capable of ring-opening reaction with an epoxy group, or a combination thereof.

Abstract: The present invention relates to a composition for a gel polymer electrolyte, which includes a lithium salt, a non-aqueous organic solvent, a polymerization initiator, and an oligomer containing a polycarbonate-based repeating unit, a gel polymer electrolyte in which mechanical strength and ion transfer capability are improved by polymerization of the composition for a gel polymer electrolyte, and a lithium secondary battery in which external impact and stability during high-temperature storage are improved by including the gel polymer electrolyte.

Abstract: A gel polymer electrolyte composition, a secondary battery including the same, and a manufacturing method of a secondary battery are disclosed. Advantages of the disclosed aspects include increasing process efficiency by reducing the curing time of a gel polymer electrolyte while preventing leakage of an electrolyte.

Abstract: A washing machine comprises a housing, a drum rotatably disposed inside the housing, a driving shaft configured to transfer a rotational force from a driving motor of the washing machine to the drum, and a driving shaft flange configured to connect the driving shaft to the drum. The driving shaft flange comprises a first surface, a second surface substantially parallel to the first surface, wherein the first surface and the second surface are spaced apart from each other by a predetermined distance in the vertical direction, and an extension portion formed perpendicular to the first surface and the second surface and connecting the first surface to the second surface. An edge of the first surface and an edge of the second surface and an edge of the extension portion are substantially aligned in vertical direction of the drum.

Abstract: A polymer for a gel polymer electrolyte, a gel polymer electrolyte and a lithium secondary battery comprising the same are disclosed herein. In some embodiments, a polymer for the gel polymer electrolyte includes a copolymer having a main chain and a first side chain and a second side chain bonded to the main chain, wherein the main chain contains a fluoropolymer, wherein the first side chain contains a siloxane group and the second side chain contains an acrylic polymer. The polymer improves stability of a gel polymer electrolyte and a lithium secondary battery including the same.

Abstract: A method of activating a secondary battery includes an operation of deriving a reduction reaction voltage according to an electrolyte additive, a pre-charging operation of pre-charging the secondary battery into which an electrolyte containing the electrolyte additive is injected, and a pre-aging operation of wetting an electrode assembly accommodated in the secondary battery with the injected electrolyte and aging the electrode assembly. A charging termination voltage in the pre-charging operation is less than the reduction reaction voltage.

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 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, an organic solvent, and a phosphoric acid-based additive represented by Formula 1 below, which improves the high temperature stability in a lithium secondary battery: wherein R is described herein.