Abstract: A display device according to an exemplary embodiment includes: a substrate including a display area and a transmission area; a metal blocking layer disposed in the display area of the substrate; an inorganic insulating layer disposed on the metal blocking film; a transistor disposed on the inorganic insulating layer; an emission layer connected to the transistor; and a light blocking layer and a color filter disposed on the emission layer of the display area, wherein the edge of the light blocking layer is protruded toward the transmission area more than the edge of the metal blocking layer.

Abstract: A battery module includes at least one cell assembly including a plurality of secondary batteries, a gas pipe configured to allow gas produced in a module housing to move therein, and the module housing including a lower case having one open side and an internal space in which the at least one cell assembly is received, and an upper case coupled to one side of the lower case to cover the one open side of the lower case and having a receiving space in which the gas pipe is received, and a connection hole to which one end of the gas pipe is connected such that the gas pipe and the internal space are in communication with each other.

Abstract: A reprint apparatus may include: a defect checking unit configured to check a defective portion in a solder resist layer of a circuit board; a material filling unit positioned above the circuit board to fill the defective portion with a filling material; and a curing unit configured to cure the material filled in the defective portion. The defect checking unit may be configured to calculate a volume of the defective portion, and the material filling unit may be configured to calculate a discharge amount of the filling material based on the calculated volume of the defective portion, and then discharge the filling material by the discharge amount.

Abstract: A positive electrode for a secondary battery includes a positive electrode active material layer, which includes a positive electrode active material including a lithium transition metal oxide which contains nickel, cobalt, and manganese and has an atomic ratio of nickel in total transition metals of 80 atm % or more, and a metal oxide including a metallic element having a binding potential with lithium of 0.5 V to 4 V. A secondary battery including the positive electrode is also provided.

Abstract: A positive electrode active material includes a lithium transition metal oxide, in which a cobalt content in the lithium transition metal oxide is less than a manganese content, wherein at least one of nickel, cobalt, and manganese in the lithium transition metal oxide has a concentration gradient that gradually changes from a center of a particle to a surface thereof, the positive electrode active material is in the form of a secondary particle formed by agglomeration of primary particles, and a ratio in which angles between c-axis directions, which are measured at at least 8 points on a surface of the positive electrode active material by TEM analysis, and a growth direction of the particle at the measuring point satisfy 85° to 95° is 60% or more.

Abstract: A positive electrode active material precursor includes: a first region formed in the center of a particle of the positive electrode active material precursor and having a composition represented by Chemical Formula 1 or 2; and a second region formed on the first region and having a composition represented by Chemical Formula 3 or 4. A method of preparing the positive electrode active material precursor is also provided.

Abstract: A positive electrode active material includes a lithium transition metal oxide, in which a cobalt content in the lithium transition metal oxide is less than a manganese content, wherein at least one of nickel, cobalt, and manganese in the lithium transition metal oxide has a concentration gradient that gradually changes from a center of a particle to a surface thereof, the positive electrode active material is in the form of a secondary particle formed by agglomeration of primary particles, and a ratio in which angles between c-axis directions, which are measured at at least 8 points on a surface of the positive electrode active material by TEM analysis, and a growth direction of the particle at the measuring point satisfy 85° to 95° is 60% or more.

Abstract: A method of preparing a positive electrode active material includes forming a pre-sintered product by mixing a transition metal precursor having a nickel content of 70 atm % or more and a lithium raw material and performing primary sintering, and forming a lithium composite transition metal oxide by performing secondary sintering on the pre-sintered product, wherein the primary sintering is performed such that a ratio of a spinel phase of the pre-sintered product is in a range of 7% to 16%.

Abstract: A positive electrode active material precursor and method of preparing the same are disclosed herein. In some embodiments, a positive electrode active material precursor includes a particle having a first region, a second region, and a third region, a composition of the particle is represented by the following Formula 1 or Formula 2: [M1aM2bM3cM4d](OH)2??[Formula 1] [M1aM2bM3cM4d]O·OH??[Formula 2] M1, M2, and M3 are different from each other and independently selected from the group consisting of Ni, Co, and Mn, M4 is at least one selected from the group consisting of B, Mg, Ca, Al, Ti, V, Cr, Fe, Zn, Ga, Y, Zr, Nb, Mo, Ta, and W, and 0<a<1, 0<b<1, 0<c<1, 0?d<1, and a+b+c+d=1, wherein the first region is at a center of a particle, the second region is disposed on the first region, and the third region is disposed on the second region.

Abstract: A method of preparing a positive electrode active material is disclosed herein. In some embodiments, the method includes firing a first mixture at 400° C. to 700° C. to prepare a primary firing product, wherein the first mixture has a positive electrode active material precursor having a specific composition, a first lithium-containing source material, and optionally, an aluminum-containing source material, and firing a second mixture at a temperature above the firing temperature of the first mixture to prepare a positive electrode active material, wherein the second mixture has the primary firing product, a second lithium-containing source material, and a specific doping element M1-containing source material. The method is capable of degrading the cake strength of a primary firing product and providing a positive electrode active material having excellent quality by dividing a firing process into two steps.

Abstract: A positive electrode active material precursor, a method of preparing the same, and a positive electrode active material, a positive electrode, and a lithium secondary battery prepared from the same. In some embodiments, a positive electrode active material precursor includes nickel, cobalt, and manganese, wherein the positive electrode active material precursor satisfies: Equation 1 (2.5?C(100)/C(001)?5.0) and Equation 2 (1.0?C(101)/C(001)?3.0), where C(001) is a crystalline size in a (001) plane, C(100) is a crystalline size in a (100) plane, and C(101) is a crystalline size in a (101) plane. The positive electrode active material precursor has particle growth of a (001) plane that is suppressed.

Abstract: Disclosed is a composition of a lubricant for cold pilgering of zirconium alloy tubes. More particularly, disclosed is a composition of an internal lubricant for cold pilgering of a zirconium alloy cladding tube, the composition exhibiting excellent lubricity and decomposition against microbes.

Abstract: Disclosed is a composition of a lubricant for cold pilgering of zirconium alloy tubes. More particularly, disclosed is a composition of an external lubricant for cold pilgering of a zirconium alloy cladding tube, the composition exhibiting excellent lubricity and decomposition against microbes.

Abstract: A method of preparing a positive electrode active material includes mixing a lithium raw material with a high nickel-containing transition metal hydroxide containing nickel in an amount of 60 mol % or more based on a total number of moles of the transition metal hydroxide and sintering the mixture to prepare a positive electrode active material, wherein the sintering includes a sintering step of heat-treating at 700° C. to 900° C. for 8 hours to 12 hours, a cooling step of cooling to room temperature, and an aging step of having a holding time when a temperature reaches a specific point during the cooling step. A positive electrode active material which is prepared by the method and has a reduced moisture content, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the positive electrode active material are also provided.

Abstract: A lithium secondary battery is disclosed herein. In some embodiments, a lithium secondary battery includes: a battery case having an interior region, a separator, wherein the separator divides the interior region into a first region and a second region, a positive electrode formed in the first region and including a positive electrode active material and positive electrode current collector particles; and a negative electrode formed in the second region and including a negative electrode active material and negative electrode current collector particles.

Abstract: A method of preparing a positive electrode active material for a secondary battery includes preparing a positive electrode active material precursor containing 60 mol % or more of nickel (Ni) among total metals, mixing the positive electrode active material precursor and a lithium raw material source and performing primary pre-sintering in an oxidizing atmosphere to form a pre-sintered product, and performing secondary main sintering on the pre-sintered product in an air atmosphere to form a lithium transition metal oxide.

Abstract: A method of preparing a positive electrode active material which includes forming a pre-sintered mixture by adding a reaction mixture including a lithium raw material and a nickel-manganese-cobalt precursor to a first crucible and performing a primary heat treatment at a temperature of 500° C. to 800° C., and, after discharging the pre-sintered mixture from the first crucible, adding the pre-sintered mixture to a second crucible and performing a secondary heat treatment at a temperature of 700° C. to 1,000° C. to form a lithium nickel manganese cobalt-based positive electrode active material, wherein a volume of the pre-sintered mixture formed after the primary heat treatment is 20% to 50% of a volume of the reaction mixture added to the first crucible.

Abstract: The present invention provides a method of preparing a positive electrode active material precursor for a lithium secondary battery, a method of preparing a positive electrode active material for a lithium secondary battery in which the positive electrode active material precursor prepared by using the above method is used, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the positive electrode active material.

Abstract: A method of preparing a positive electrode material is provided. The method includes mixing a first positive electrode active material precursor having an average particle diameter (D50) of 10 ?m to 30 ?m with a lithium-containing raw material and pre-sintering the mixture to obtain a first pre-sintered product, mixing a second positive electrode active material precursor having an average particle diameter (D50) different from that of the first positive electrode active material precursor with a lithium-containing raw material and pre-sintering the mixture to obtain a second pre-sintered product, disintegrating each of the first pre-sintered product and the second pre-sintered product, and mixing the disintegrated first pre-sintered product and the disintegrated second pre-sintered product and main-sintering the mixture to obtain a positive electrode material.

Abstract: Disclosed is a composition of a lubricant for cold pilgering of zirconium alloy tubes. More particularly, disclosed is a composition of an internal lubricant for cold pilgering of a zirconium alloy cladding tube, the composition exhibiting excellent lubricity and decomposition against microbes.