Abstract: A multilayer capacitor includes a capacitor body including dielectric layers and internal electrodes alternately disposed with the dielectric layers interposed therebetween; and an external electrode disposed on the capacitor body to be connected to one or more of the internal electrodes. Porosity of ends of the internal electrodes is less than 50% on an interfacial surface between a margin of the capacitor body in a width direction the capacitor body and the internal electrodes.

Abstract: Disclosed is a wheel structure including a first hub member, a plurality of spokes that are provided in a circumferential direction (C1) of the first hub member, protrude outward from the first hub member in an outward direction (R1) intersecting the circumferential direction (C1), and have sides coupled to the first hub member, guide parts to which the plurality of spokes are slidably coupled, and a second hub member to which sides of the guide parts are rotatably coupled, wherein the plurality of spokes include a rotation spoke rotatably coupled to the first hub member.

Abstract: Designs of thermo-hygrostat devices capable of uniformly maintain temperature and humidity inside a chamber are disclosed. One example of such a device can include, among others, a chamber in which a sample is accommodated and internal temperature and humidity can be controlled; a lower duct provided on a first side of the chamber and sending a fluid inside the chamber to an outside of the chamber; a temperature and humidity control portion provided on the lower duct and controlling temperature and humidity of a fluid received from the lower duct.

Abstract: The present invention relates to a lithium secondary battery including a non-aqueous electrolyte solution containing a lithium salt, an organic solvent, a first additive represented by Formula 1 and a second additive represented by Formula 2, a positive electrode including a lithium iron phosphate-based composite oxide, a negative electrode including a negative electrode active material, and a separator interposed between the positive electrode and the negative electrode, wherein an amount of the first additive and an amount of the second additive are each 0.1 wt% to 5 wt% based on the total weight of the non-aqueous electrolyte solution, wherein R1, R2, Cy1 and L1 are described herein.

Abstract: The present disclosure relates to a lithium secondary battery including: a non-aqueous electrolyte including a lithium salt, an organic solvent, a first additive represented by Chemical Formula 1 and a second additive represented by Chemical Formula 2; a positive electrode including a positive electrode active material including a lithium iron phosphate-based composite oxide; a negative electrode including an negative electrode active material; and a separator interposed between the positive electrode and the negative electrode.

Abstract: The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery, and a lithium secondary battery including the non-aqueous electrolyte solution. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery may include a lithium salt, a non-aqueous organic solvent, a first additive comprising a compound represented by Formula 1, at least one second additive selected from the group consisting of vinylethylene carbonate (VEC) and ethyl di(pro-2-yn-1-yl) phosphate (EDP), and at least one third additive selected from the group consisting of a cyclic carbonate compound and a compound represented by Formula 2.

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 a lithium salt, an organic solvent, and an additive comprising a compound represented by the following Chemical Formula 1: wherein Q is a single bond, or a substituted or non-substituted C1-C10 alkyl group, and each of A1, A2 and A3 independently represents hydrogen (H) or a substituted or non-substituted C1-C10 alkyl group. The non-aqueous electrolyte can scavenge decomposition products of lithium salt to maintain passivation of an SEI film during high-temperature storage. The non-aqueous electrolyte improves battery performance by improving self-discharge phenomenon caused by elution from a positive electrode and breakage of the SEI film at a negative electrode.

Abstract: The present disclosure relates to a non-aqueous electrolyte solution for a lithium secondary battery, and the non-aqueous electrolyte solution includes: a lithium salt; an organic solvent; and an additive including vinylene carbonate, vinyl ethylene carbonate, and a compound represented by chemical formula 1: Herein, each of R1 to R3 is independently hydrogen or an alkyl group having 1 to 3 carbon atoms.

Abstract: The present invention relates to a non-aqueous electrolyte comprising a lithium salt; an organic solvent; and a compound represented by Chemical Formula 1, wherein the invention can control moisture in the lithium secondary battery in which the non-aqueous electrolyte is used, suppress by-product formation according to moisture control, and improve the durability of the solid electrolyte layer, thereby improving the durability thereof, wherein L1 and L2 are each independently a single bond or an alkylene group having 1 to 5 carbon atoms, and R1 is hydrogen or an alkyl group having 1 to 5 carbon atoms.

Abstract: The present invention relates to an electrolyte for a lithium secondary battery and a lithium secondary battery including the same, the electrolyte including a lithium salt, an additive containing a compound represented by Formula 1, and an organic solvent.

Abstract: A whitlockite preparation method includes: determining a size of the whitlockite crystal to be prepared; determining a first amount of a first cation other than calcium ion on the basis of the determined size of the crystal, wherein when the determined size of the whitlockite crystal is a first size, the first amount is determined to be a first value, wherein when the determined size is a second size larger than the first size, the first amount is determined to be a second value; mixing calcium ion and phosphate ion in order to prepare a first phosphate crystal, wherein the determined first amount of the cation other than calcium ion is also mixed therewith; mixing a second amount of cation other than calcium ion with phosphate ion to prepare a second phosphate crystal; and aging a solution containing the first phosphate crystal and the second phosphate crystal.

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, non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and a compound represented by Formula 1 as a first additive. A lithium secondary battery including the non-aqueous electrolyte has improved flame retardancy.

Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte solution for a lithium secondary battery, which includes a compound represented by Formula 1 having an excellent effect of scavenging a decomposition product generated from a lithium salt in the electrolyte solution, as a first additive, and lithium difluorophosphate as a second additive, and a lithium secondary battery in which an effect of improving high-temperature durability is improved by including the same.

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 compound represented by Formula 1 as a first additive. A lithium secondary battery including the non-aqueous electrolyte has improved high-temperature storage characteristics.

Abstract: A non-aqueous electrolyte solution and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution for a lithium secondary battery includes a lithium salt, an organic solvent, a compound represented by Formula 1 as a first additive, and lithium difluorophosphate as a second additive, wherein a weight ratio of the first additive to the second additive is in a range of 1:2 to 1:10.

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, an organic solvent, and a compound represented by Formula 1. In some embodiments, a lithium secondary battery includes a positive electrode, a negative electrode, and the electrolyte.

Abstract: The present invention relates to an electrolyte for a lithium secondary battery and a lithium secondary battery including the same. In some embodiments, the electrolyte includes a lithium salt, a first additive, a second additive, and an organic solvent, wherein the first additive includes a compound represented by Formula 1 and the second additive includes a compound represented by Formula 2.

Abstract: An electrolyte for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, an electrolyte includes a lithium salt, an organic solvent, and an additive, wherein the additive includes a compound represented by Formula 1 and a compound represented by Formula 2.

Abstract: A non-aqueous electrolyte solution additive, a non-aqueous electrolyte solution for a lithium secondary battery including the same, and a lithium secondary battery including the non-aqueous electrolyte solution are disclosed herein. In some embodiments, the non-aqueous electrolyte solution additive includes a Lewis base compound capable of rapidly reacting with an acid. In some embodiments, the lithium secondary battery including the non-aqueous electrolyte solution has improved high-temperature storage durability.

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, a first additive, and a second additive, wherein the first additive is lithium 4,5-dicyano-2-(trifluoromethyl)imidazolide, and the second additive is tetravinylsilane.