Abstract: A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same, the negative electrode including a current collector; and a negative electrode active material layer located on the current collector and including a negative electrode active material. The negative electrode active material includes a silicon-based composite, the silicon-based composite is a composite of a silicon-based active material, a phenoxy resin, and carbon nanotubes, and a weight ratio of the silicon-based active material and the carbon nanotubes ranges from about 1:0.0013 to about 1:0.01.

Abstract: A composition for an organic optoelectronic device, an organic optoelectronic device, and a display device, the composition including a first compound represented by Chemical Formula I, a second compound represented by Chemical Formula II, and a third compound represented by Chemical Formula III,

Abstract: A polarizing plate and an optical display apparatus are provided. A polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer, and the first retardation layer has a short wavelength dispersion of about 1 to about 1.03, a long wavelength dispersion of about 0.98 to about 1, and an in-plane retardation of about 180 nm to about 220 nm at a wavelength of 550 nm, the second retardation layer has a short wavelength dispersion of about 1 to about 1.1, a long wavelength dispersion of about 0.96 to about 1, and an in-plane retardation Re of about 70 nm to about 120 nm at a wavelength of 550 nm, and a ratio of out-of-plane retardation of the second retardation layer at a wavelength of 550 nm to thickness thereof is about ?33 nm/?m to about ?15 nm/?m.

Abstract: Provided are a polarizing plate and an optical display device comprising same, the polarizing plate comprising: a polarizer; and a first phase difference layer, a second phase difference layer and a third phase difference layer which are sequentially stacked on the lower surface of the polarizer. The first phase difference layer comprises a positive C phase difference layer. The second phase difference layer has positive wavelength dispersibility and an in-plane phase difference of approximately 200 nm to 280 nm in a wavelength of 550 nm. The third phase difference layer has positive wavelength dispersibility and an in-plane phase difference of approximately 80 nm to 145 nm in a wavelength of 550 nm.

Abstract: Provided are a positive electrode active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The positive electrode active material for a rechargeable lithium battery includes a lithium nickel-based composite oxide, wherein the positive electrode active material is in a form of a secondary particle in which a plurality of primary particles are aggregated together and at least a portion of the primary particles are radially arranged, the secondary particle includes an inner portion and an outer portion, the inner portion of the secondary particle is a region from a center of the secondary particle to 50±5 length % of the total distance from the center to the surface of the secondary particle, and is a region in which primary particles and pores are irregularly arranged.

Abstract: A cylindrical secondary battery according to the present disclosure comprises: an electrode assembly having a positive electrode plate, a separator, and a negative electrode plate; a cylindrical can, housing the electrode assembly and having an open bottom, in electrical contact with the negative electrode plate; a terminal rivet penetrating the top of the cylindrical can be in electrical contact with the positive electrode plate; and a cap assembly sealing the bottom end of the cylindrical can, wherein the cap assembly comprises a cap plate, and a gasket covering the entire surface of the cap plate.

Abstract: Provided are a cathode for a secondary battery, a manufacturing method therefor, and a lithium secondary battery comprising same, the cathode comprising: a cathode current collector; a first layer which is arranged on at least one surface of the cathode current collector and which comprises a first cathode active material; and a second layer which is arranged on the first layer and which comprises a second cathode active material, wherein the first cathode active material is represented by the following chemical formula 1, the second cathode active material is represented by the following chemical formula 1 or 2, and the first cathode active material and the second cathode active material are different from each other. LixNiyM1?yO2??<Chemical formula 1> Li?Co?M?1??O2??<Chemical formula 2> See the Detailed Description of the Invention for the definitions of x, y, a, p, M and M? in the formulas.

Abstract: Provided are an electrolyte additive for lithium secondary battery including a compound represented by Formula 1 below, an electrolyte for lithium secondary battery including the same, and a lithium secondary battery including the electrolyte. wherein, in Formula 1, R1 to R3 are as defined in the detailed description.

Abstract: Provided are a composition for forming a silica layer including a silicon-containing polymer and a solvent, wherein when adding 70 g of the composition for forming the silica layer to a 100 ml container, leaving it at 40° C. for 28 days, and taking 1 ml of gas generated from the composition, 1 ml of the gas includes hydrogen gas (H2), silane gas (SiH4), and ammonia gas (NH3), and the hydrogen gas, silane gas, and ammonia gas satisfy Equation 1: [(hydrogen gas amount (ppm))/(silane gas amount (ppm)+ammonia gas amount (ppm))?1.5], a silica layer manufactured therefrom, and an electronic device including the silica layer.

Abstract: The present invention relates to a secondary battery and a method for manufacturing same, and the technical problem to be solved is to prevent damage due to fatigue loading that may occur during ultrasonic welding between an electrode tab and an auxiliary tab, by strongly laser welding between the auxiliary tab and a current collecting portion of a single plate.

Abstract: An energy storage module includes: a cover member including an internal receiving space configured to accommodate battery cells each including a vent; a top plate coupled to a top of the cover member and including ducts respectively corresponding to the vents of the battery cells; a top cover coupled to a top portion of the top plate and including discharge holes located in an exhaust area and respectively corresponding to the ducts; and an extinguisher sheet located between the top cover and the top plate, and configured to emit a fire extinguishing agent at a temperature exceeding a reference temperature, and the top cover includes protrusion parts located on a bottom surface of the top cover, covering the exhaust area, and coupled to an exterior of the ducts.

Abstract: An embodiment of the present invention provides a secondary battery capable of concurrently securing a vibration characteristic and an insulation function of an electrode assembly by using one finishing tape.

Abstract: An energy storage system including one or more battery cells connected in series, one or more isolated DC/DC converters, each isolated DC/DC converter having one end connected to one battery cell and an other end connected to another battery cell adjacent to the one battery cell so as to equalize a cell voltage through charging and discharging of the two battery cells which are each electrically connected to one of the plurality of battery cells, and a plurality of battery modules each including a controller configured to control a charge mode and a discharge mode of the plurality of isolated DC/DC converters.

Abstract: A separator for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided, and the separator for a rechargeable lithium battery comprises: a porous substrate; and a coating layer disposed on at least one surface of the porous substrate and comprising first polyethylene particles, second polyethylene particles, and ceramics, wherein the ratio of the average size of the second polyethylene particles to the average size of the first polyethylene particles ranges from 25 to 80%.

Abstract: A rechargeable battery according to the present disclosure includes: an electrode assembly; a pouch case that includes a first receiving portion surrounding a part of the electrode assembly, a second receiving portion that is coupled with the first receiving portion while surrounding the rest of the electrode assembly, and a penetration portion penetrating one or more of the first receiving portion and second receiving portion, and that receives the electrode assembly; and a venting member that is provided in the penetration portion, and is opened when an internal pressure reaches a threshold pressure.

Abstract: Disclosed is a secondary battery including a case configured to surround an exterior of an electrode assembly, and a strain sensor attached to an exterior of the case to detect deformation of the case. The strain sensor may include a backing part attached to the exterior of the case; a strain gauge installed on the backing part and formed of single-crystal silicon; a wiring part stacked on the backing part, along with the strain gauge, and electrically connected to the strain gauge; and an encapsulation part fixed to the backing part while surrounding the strain gauge and the wiring part excluding a portion of the wiring part.

Abstract: A separator for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided, and the separator for the rechargeable lithium battery includes a porous substrate and a coating layer on at least one surface of the porous substrate and including polyethylene particles and ceramics. The content of the polyethylene particles is 40 to 65 wt % by weight of the content of the porous substrate, the weight-average molecular weight of the polyethylene particles ranges from 1000 g/mol to 3000 g/mol, and the mixing ratio (ratio by weight) of the polyethylene particles to the ceramics ranges from 95:5 to 80:20.

Abstract: A rechargeable battery includes: a case receiving an electrode assembly and including an opening; a cap assembly including a cap plate coupled to the case to cover the opening, and a terminal plate thermally fused to the cap plate by a thermal-fusion member, the thermal-fusion member electrically insulating the cap plate and the terminal plate from each other; and a sealing part attached to and located on a side of the thermal-fusion member, a side surface of the terminal plate, and an outer surface of the cap plate.

Abstract: A positive electrode layer for an all-solid secondary battery, an all-solid secondary battery including the positive electrode layer, a method of preparing the positive electrode layer, and a composition, the positive electrode layer including a positive electrode current collector and a positive active material layer on the positive electrode current collector, wherein the positive active material layer includes a positive active material, a binder, a conducting agent, a sulfide solid electrolyte, and a dispersion medium, the dispersion medium including a compound represented by Formula 1 and a compound represented by Formula 2, R1—C(?O)O—R2??Formula 1 in Formula 1, R1 is a C1-C2 alkyl group and R2 is a C7-C9 alkyl group, R2?—OH??Formula 2 in Formula 2, R2? is a C7-C9 alkyl group.

Abstract: An electrode assembly includes: a plurality of positive electrodes and a plurality of negative electrodes, alternately and repeatedly stacked; a plurality of separators between the positive electrodes and the negative electrodes, respectively, to protrude from the positive electrodes and the negative electrodes and stacked such that first surfaces at edges thereof face each other; and a fixing member including an adhesive layer adhered to the first surfaces of the separators that are facing each other.