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, a method of preparing the same, and positive electrode active material prepared from the same are disclosed herein. In some embodiments, a positive electrode active material precursor includes a spherical secondary particle formed by aggregation of primary particles and includes a core portion composed of randomly oriented primary particles, a first shell portion which is formed on the first core portion and composed of the primary particles having a (001) plane oriented in a direction from a center of the secondary particle toward a surface thereof, and a second shell portion which is formed on the first shell portion and composed of randomly oriented primary particles.

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 is capable of achieving a positive electrode active material in the form of a single particle even by a heat treatment at a low temperature. A positive electrode active material precursor has the composition represented by Formula 1 described in the present specification and includes a composite transition metal in the form of a single particle. A method of preparing the positive electrode active material precursor and a method of preparing a positive electrode active material using the same are also provided.

Abstract: A positive electrode active material for a lithium secondary battery and a method for preparing the same is disclosed herein. In some embodiments, a method comprises heating a mixed solution to combust the mixed solution into a powder, wherein the mixed solution includes a first fuel, a second fuel, a metal raw material, and water, and heat treating the powder wherein the first fuel is least one first fuel selected from the group consisting of urea, glycine, carbohydrazide, oxalyldihydrazide, and hexamethylenetetramine, the second fuel is at least one second fuel selected from the group consisting of citric acid, oxalic acid, sucrose, glucose, and acetylacetone, and the metal raw material includes a lithium raw material, a nickel raw material, a cobalt raw material, and a manganese raw material.

Abstract: A positive electrode active material precursor for a secondary battery, which is a secondary particle in which primary particles are aggregated, includes a core portion including nickel (Ni), cobalt (Co), and manganese (Mn), and a shell portion surrounding a surface of the core portion and including nickel (Ni), cobalt (Co), manganese (Mn), and aluminum (Al), wherein the core portion and the shell portion has rod-shaped primary particles, and an average major axis length of the primary particles of the shell portion is smaller than an average major axis length of the primary particles of the core portion. A method of preparing the positive electrode active material precursor, and a positive electrode active material prepared by using the positive electrode active material precursor are also provided.

Abstract: A positive electrode active material precursor has a hydroxide represented by Formula 1, wherein the positive electrode active material precursor is a secondary particle, in which a plurality of primary particles are aggregated, and includes crystallines in which major axes of the primary particles are arranged in a direction from a center of the secondary particle toward a surface thereof and a (001) plane of the primary particle is arranged parallel to the major axis of the primary particle. A method of preparing the positive electrode active material precursor, and a positive electrode active material prepared by using the positive electrode active material precursor are also provided.

Abstract: The present invention relates to a positive electrode active material, which includes a lithium transition metal oxide having an average composition represented by Formula 1 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, a method of preparing the positive electrode active material, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the p

Abstract: The present disclosure relates to a precursor of a positive electrode active material for a secondary battery including a single layer-structured secondary particle in which pillar-shaped primary particles radially oriented in a surface direction from the particle center are aggregated, wherein the secondary particle has a shell shape, and the primary particle includes a composite metal hydroxide of Ni—Co—Mn of the following Chemical Formula 1, and a positive electrode active material prepared using the same: Ni1?(x+y+z)CoxMyMnz(OH)2??[Chemical Formula 1] In Chemical Formula 1, M, x, y and z have the same definitions as in the specification.

Abstract: The present disclosure relates to a precursor of a positive electrode active material for a secondary battery including a single layer-structured secondary particle in which pillar-shaped primary particles radially oriented in a surface direction from the particle center are aggregated, wherein the secondary particle has a shell shape, and the primary particle includes a composite metal hydroxide of Ni—Co—Mn of the following Chemical Formula 1, and a positive electrode active material prepared using the same: Ni1?(x+y+z)CoxMyMnz (OH)2 ??[Chemical Formula 1] In Chemical Formula 1, M, x, y and z have the same definitions as in the specification.

Abstract: The present invention relates to a nano-porous electrode for a super capacitor and a manufacturing method thereof, and more specifically, to a nano-porous electrode for a super capacitor and a manufacturing method thereof wherein pores are formed on the surface or inside an electrode using an electrodeposition method accompanied by hydrogen generation, thereby increasing the specific surface area of the electrode and thus improving the charging and discharging capacity, energy density, output density, and the like of a capacitor.

Abstract: A method of manufacturing a powder having a high surface area is provided. According to the method of manufacturing a powder having a high surface area, a metal electrolyte in which metal ions of different kinds of first metals are dissociated is prepared. Subsequently, a metal alloy powder formed of the first metals is formed by soaking a second metal having a higher reducing power than the first metals in the metal electrolyte to induce a first spontaneous substitution reaction. Therefore, it is possible to form a powder having an improved specific surface area.

Abstract: A method of manufacturing a powder having a high surface area is provided. According to the method of manufacturing a powder having a high surface area, a metal electrolyte in which metal ions of different kinds of first metals are dissociated is prepared. Subsequently, a metal alloy powder formed of the first metals is formed by soaking a second metal having a higher reducing power than the first metals in the metal electrolyte to induce a first spontaneous substitution reaction. Therefore, it is possible to form a powder having an improved specific surface area.

Abstract: The present invention relates to a nano-porous electrode for a super capacitor and a manufacturing method thereof, and more specifically, to a nano-porous electrode for a super capacitor and a manufacturing method thereof wherein pores are formed on the surface or inside an electrode using an electrodeposition method accompanied by hydrogen generation, thereby increasing the specific surface area of the electrode and thus improving the charging and discharging capacity, energy density, output density, and the like of a capacitor.