Abstract: An electrode includes an electrode active material layer, wherein the electrode active material layer includes an electrode active material and a conductive agent, wherein the conductive agent includes a first conductive agent and a second conductive agent, wherein the first conductive agent includes a secondary particle in which a plurality of graphene sheets are arranged in different directions and a portion of one graphene sheet is connected to a portion of adjacent another graphene sheet, the second conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is included in an amount of 0.01 wt % to 0.5 wt % in the electrode active material layer. A secondary battery including the electrode is also provided.

Abstract: A positive electrode active material, a method for producing the same, and a positive electrode and a lithium secondary battery in including the same are disclosed herein. In some embodiments, a method of producing a positive electrode active material includes mixing a lithium transition metal oxide and a carbon-based material having a hollow structure to form a mixture, and mechanically treating the mixture to form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material has a chain shape, and has a specific surface area of 500 m2/g or greater, a graphitization degree (ID/IG) of 1.0 or higher, and a dibutylphthalate (DBP) absorption of 300 mL/100 g or greater.

Abstract: A positive electrode active material in the form of a single particle and a lithium secondary battery containing the positive electrode active material thereof are provided. The positive electrode active material has a nickel-based lithium composite metal oxide single particle. The single particle includes a metal doped in the crystal lattice thereof. The single particle includes, in the crystal lattice, a surface part having a rock salt structure, a spinel structure, or a mixed structure thereof from a surface of the single particle to a depth of 0.13% to 5.26% of a radius of the single particle, and a central part having a layered structure from an interface with the surface part thereof to the center part of the single particle.

Abstract: The present disclosure relates to a positive electrode additive, a manufacturing method thereof, and a positive electrode and a lithium rechargeable battery including the same. Specifically, one embodiment of the present disclosure provides a positive electrode additive for a lithium rechargeable battery comprising: a compound represented by the following Chemical Formula 1; a compound represented by the following Chemical Formula 2; and lithium phosphate (Li3PO4): Li2+aNibM1?bO2+c??[Chemical Formula 1] wherein, M is a metal element forming a divalent cation, ?0.2?a?0.2, 0.5?b?1.0, and ?0.2?c?0.2, Ni2?eM1?eP4O12??[Chemical Formula 2] wherein, 0.5?e?1.0, and M is the same as defined in Chemical Formula 1.

Abstract: A positive electrode active material includes lithium nickel-based oxide particles having a single-particle form composed of a single nodule or a single-particle-like form, which is a complex of at most 30 nodules. The positive electrode active material further includes a coating layer formed on the surface of the lithium nickel-based oxide particles, wherein the coating layer is formed by using a nano-sized coating precursor which is a chelate complex comprising lithium, nickel, cobalt, and Ma, where Ma is Mn, Al, or a combination thereof.

Abstract: A positive electrode active material includes a lithium transition metal oxide and a coating element M3-containing coating layer formed on a surface of the lithium transition metal oxide, wherein M3 comprises at least one of Al, Ti, Mg, Zr, W, Y, Sr, or Co, wherein the lithium transition metal oxide is doped with a doping element M2, wherein M2 includes at least one of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, or B, wherein the lithium transition metal oxide has a single particle form, and includes a center portion having a layered structure and a surface portion having a rock-salt structure, and the total amount of the doping element M2 and the coating element M3 is in a range of 4,580 ppm to 9,120 ppm based on a total weight of the positive electrode active material.

Abstract: A positive electrode active material including a lithium nickel-based oxide in the form of a single particle composed of one nodule or a pseudo-single particle that is a composite of 30 or less nodules; and a coating portion which is formed in the form of an island on a portion of a surface of the lithium nickel-based oxide particle and includes cobalt (Co), wherein, in a Ni L3-edge spectrum obtained by measuring the surface of the lithium nickel-based oxide, which is in contact with the coating portion, by electron energy loss spectroscopy, an intensity at 855.5 eV is higher than an intensity at 853 eV. A preparation method thereof, a positive electrode and a lithium secondary battery which include the positive electrode active material are also provided.

Abstract: A positive electrode active material includes a lithium composite transition metal oxide in the form of a single particle composed of one single nodule and/or in the form of a pseudo-single particle, which is a composite of 30 or less nodules, and a coating layer formed on the surface of the lithium composite transition metal oxide particle. The coating layer contains aluminum (Al) and tungsten (W). The positive electrode active material satisfies Equation 1 below: 45?X×X??56??[Equation 1] wherein, X is the content of nickel among all metals except for lithium in the lithium composite transition metal oxide (unit: mol %), and X? is the BET specific surface area of the positive electrode active material (unit: m2/g).

Abstract: A positive electrode active material includes a lithium transition metal oxide and a coating element M3-containing coating layer formed on a surface of the lithium transition metal oxide, wherein M3 comprises at least one of Al, Ti, Mg, Zr, W, Y, Sr, or Co, wherein the lithium transition metal oxide is doped with a doping element M2, wherein M2 includes at least one of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, or B, wherein the lithium transition metal oxide has a single particle form, and includes a center portion having a layered structure and a surface portion having a rock-salt structure, and the total amount of the doping element M2 and the coating element M3 is in a range of 4,580 ppm to 9,120 ppm based on a total weight of the positive electrode active material.

Abstract: The present invention provides a positive electrode active material for a secondary battery, which includes a lithium transition metal oxide including nickel (Ni) and cobalt (Co), and at least one selected from the group consisting of aluminum (Al), manganese (Mn), and a combination thereof. The lithium transition metal oxide is characterized in that the content of nickel (Ni) in the total transition metal elements is 80 mol % or more, and the cation mixing ratio of Ni cations in a lithium layer in the lithium transition metal oxide structure is 1.1% or less.

Abstract: A lithium composite transition metal oxide includes nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide includes two or more kinds of first dopants selected from the group consisting of Zr, Al, V, Co, and Mg and two or more kinds of second dopants selected from the group consisting of Ti, Y, Sr, Nb, Ba, and Ca, and particles of the lithium composite transition metal oxide has a crystallite size of 170-300 nm.

Abstract: present disclosure A positive electrode active material and a method for preparing the same are provided. The method for preparing a positive electrode material present disclosure—includes the steps of mixing a transition metal precursor and a lithium raw material and primarily sintering the mixture to prepare a lithium nickel-based oxide in the form of single particles or quasi-single particles, secondarily sintering the lithium nickel-based oxide in the form of single particles or quasi-single particles, and mixing the secondarily sintered lithium nickel-based oxide and a boron raw material and then heat-treating the mixture to form a coating layer.

Abstract: A positive electrode active material for a secondary battery is provided, which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a particle of the lithium composite transition metal oxide includes a core portion and a resistance portion formed on a surface of the core portion, and is composed of a single particle, wherein the core portion has a layered crystal structure of space group R-3m, and the resistance portion has a cubic rock-salt structure of space group Fm-3m.

Abstract: A method of preparing a positive electrode active material for a lithium secondary battery which includes: (1) mixing a lithium composite transition metal oxide in a form of a single particle or pseudo-single particle with a cobalt-containing raw material and performing a heat treatment to form a cobalt coating layer on a surface of the lithium composite transition metal oxide; and (2) mixing the lithium composite transition metal oxide having the cobalt coating layer formed thereon with a boron-containing raw material and performing a heat treatment to form a boron coating layer on the cobalt coating layer. A positive electrode active material for a lithium secondary battery which is prepared thereby, is also provided.

Abstract: A positive electrode active material for a secondary battery is provided, which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a particle of the lithium composite transition metal oxide includes a core portion and a resistance portion formed on a surface of the core portion, and is composed of a single particle, wherein the core portion has a layered crystal structure of space group R-3m, and the resistance portion has a cubic rock-salt structure of space group Fm-3m.

Abstract: A positive electrode active material in the form of a single particle and a lithium secondary battery containing the positive electrode active material thereof are provided. The positive electrode active material has a nickel-based lithium composite metal oxide single particle. The single particle includes a metal doped in the crystal lattice thereof. The single particle includes, in the crystal lattice, a surface part having a rock salt structure, a spinel structure, or a mixed structure thereof from a surface of the single particle to a depth of 0.13% to 5.26% of a radius of the single particle, and a central part having a layered structure from an interface with the surface part thereof to the center part of the single particle.

Abstract: A lithium composite transition metal oxide includes nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide includes two or more elements selected from the group consisting of Zr, Al, V, Co, and Mg and additional two or more elements selected from the group consisting of Ti, Y, Sr, Nb, Ba, and Ca, and the lithium composite transition metal oxide is in a form of a particle having a crystallite size of 170-300 nm.

Abstract: A positive electrode active material includes a lithium transition metal oxide and a coating element M3-containing coating layer formed on a surface of the lithium transition metal oxide, wherein M3 comprises at least one of Al, Ti, Mg, Zr, W, Y, Sr, or Co, wherein the lithium transition metal oxide is doped with a doping element M2, wherein M2 includes at least one of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, or B, wherein the lithium transition metal oxide has a single particle form, and includes a center portion having a layered structure and a surface portion having a rock-salt structure, and the total amount of the doping element M2 and the coating element M3 is in a range of 4,580 ppm to 9,120 ppm based on a total weight of the positive electrode active material.

Abstract: A positive electrode active material in the form of a single particle and a lithium secondary battery containing the positive electrode active material thereof are provided. The positive electrode active material has a nickel-based lithium composite metal oxide single particle. The single particle has a plurality of crystal grains. An average particle size (D50) of the single particle is from 3.5 ?m to 8 ?m. The single particle includes a metal doped in the crystal lattice thereof.

Abstract: The present disclosure discloses a positive electrode active material for a lithium secondary battery comprising a secondary particle having an average particle size (D50) of 1 to 15 ?m, formed by agglomeration of at least two primary macro particles having an average particle size (D50) of 0.1 to 3 ?m; and a coating layer of a lithium-metal oxide on a surface of the secondary particle, wherein the primary macro particles are represented by LiaNi1-x-yCoxM1yM2wO2 (1.0?a?1.5, 0?x?0.2, 0?y?0.2, 0?w?0.1, 0?x+y?0.2, M1 includes at least one metal of Mn or Al, and M2 includes at least one metal selected from the group consisting of Ba, Ca, Zr, Ti, Mg, Ta, Nb and Mo), and wherein the lithium-metal oxide is a low-temperature phase LixCoO2(0<x?1) having at least one of a spinel structure (Fd-3m) or a disordered rock-salt structure (Fm-3m).