Abstract: The present invention provides a positive electrode active material precursor for a secondary battery which includes primary particles of Co3O4 or CoOOH, wherein the primary particle contains a doping element in an amount of 3,000 ppm or more, and has an average particle diameter (D50) of 15 ?m or more, and a positive electrode active material for a secondary battery which includes particles of a lithium cobalt-based oxide, wherein the primary particle contains a doping element in an amount of 2,500 ppm or more, and has an average particle diameter (D50) of 15 ?m or more.

Abstract: The present invention provides a positive active material for a rechargeable lithium battery, the active material including a dopant and having a crystalline structure in which metal oxide layers (MO layers) including metals and oxygen and reversible lithium layers are repeatedly stacked, wherein in a lattice configured by oxygen atoms of the MO layers adjacent to each other, the dopant time of charge, thereby forming a lithium trap and/or lithium dumbbell structure.

Abstract: A positive electrode active material for a secondary battery is provided. The positive electrode active material being a lithium cobalt-based oxide includes a doping element M. A lithium cobalt-based oxide particle containing the doping element M in an amount of 3,000 ppm or more, wherein in a bulk portion corresponding to 90% of a core side among the radius from a core of the particle to a surface thereof, the doping element M in the lithium cobalt-based oxide particle is contained at a constant concentration, and in a surface portion from the surface of the particle to 100 nm in a core direction, the doping element M is contained at a concentration equal to or higher than that in the bulk portion and has a concentration in which the concentration thereof is gradient gradually decreased in the core direction from the surface of the particle.

Abstract: A positive electrode active material and a method for producing the same are disclosed herein. In some embodiments, a positive electrode active material includes a lithium-nickel-based oxide in the form of at least one of single particles or a pseudo-single particles, wherein each single particle consists of one nodule, wherein each pseudo-primary particles is a composite of 30 or fewer nodules, wherein on the surface of the lithium-nickel-based oxide, a number of nickel ions having an oxidation number of +3 or higher is greater than a number of nickel ions having an oxidation number less than +3.

Abstract: A positive electrode active material contains a lithium-rich lithium manganese-based oxide, wherein the lithium manganese-based oxide has a composition of the following chemical formula (1), and wherein a lithium ion conductive glass-ceramic solid electrolyte layer containing at least one selected from the group consisting of thio-LISICON(thio-lithium super ionic conductor), LISICON(lithium super ionic conductor), Li2S—SiS2—Li4SiO4, and Li2S—SiS2—P2S5—Lil is formed on the surface of the lithium manganese-based oxide particle: Li1?xMyMn1?x?yO2?zQz??(1) wherein, 0<x?0.2, 0<y?0.2, and 0?z?0.5; M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Ga, In, Ru, Zn, Zr, Nb, Sn, Mo, Sr, Sb, W, Ti and Bi; and Q is at least one element selected from the group consisting of P, N, F, S and Cl.

Abstract: Exemplary embodiments of positive electrode active materials in the form of single particles, and a method of preparing each of them, are provided. The single particles of the exemplary embodiments include single particles of a nickel-based lithium composite metal oxide, having a plurality of crystal grains, each having a size of 180 nm to 300 nm, as analyzed by a Cu K? X-ray (X-r?). The single particles include a metal doped in the crystal lattice thereof. One embodiment includes a surface coating. The total content of the metal doped in the crystal lattice thereof and the metal of the metal oxide coated on the surface thereof is controlled in the range of 2500 ppm to 6000 ppm.

Abstract: Provided is a method of preparing an irreversible positive electrode additive for a secondary battery, which includes mixing Li2O, NiO, and NH4VO3 and performing thermal treatment to prepare a lithium nickel composite oxide represented by Chemical Formula 1 below, wherein the NH4VO3 is mixed in an amount of 1.5 to 6.5 parts by weight with respect to a total of 100 parts by weight of the Li2O, NiO, and NH4VO3. Li2+aNi1?b?cM1bVcO2?dAd??[Chemical Formula 1] In Chemical Formula 1, M1 is at least one selected from the group consisting of Cu, Mg, Pt, Al, Co, P, W, Zr, Nb, and B, A is at least one selected from the group consisting of F, S, Cl, and Br, and 0?a?0.2, 0?b?0.5, 0.01?c?0.065, and 0?d?0.2 are satisfied.

Abstract: A method for producing a positive electrode active material, a positive electrode active material produced thereby, and a positive electrode and a lithium secondary battery including the same are provided. The method includes preparing a nickel-manganese-aluminum precursor having an atomic fraction of nickel of 90 atm % or greater in all transition metals, and mixing the nickel-manganese-aluminum precursor, a cobalt raw material, and a lithium raw material and heat treating the mixture.

Abstract: In one embodiment, a positive electrode active material for a secondary battery, the positive electrode active material being a primary particle having a monolithic structure that includes a lithium composite metal oxide of Formula 1 below, wherein the primary particle has an average particle size (D50) of 2 ?m to 20 ?m and a Brunauer-Emmett-Teller (BET) specific surface area of 0.15 m2/g to 0.5 m2/g, and wherein the positive electrode active material has a rolling density of 3.0 g/cc or higher under a pressure of 2 ton·f: LiaNi1-x-yCoxM1yM3zM2wO2??[Formula 1] in Formula 1, M1 is at least one selected from the group consisting of Al and Mn, M2 is any one or two or more elements selected from the group consisting of Zr, Ti, Mg, Ta, and Nb, M3 is any one or two or more elements selected from the group consisting of W, Mo, and Cr, and 1.0?a?1.5, 0?x?0.5, 0?y?0.5, 0.005?z?0.01, 0?w?0.04, 0<x+y?0.7.

Abstract: Disclosed are a transition metal precursor for preparation of a lithium transition metal oxide, in which a ratio of tap density of the precursor to average particle diameter D50 of the precursor satisfies the condition represented by Equation 1 below, and a lithium transition metal oxide prepared using the same.

Abstract: A method of treating the surface of a positive electrode active material that is capable of inhibiting a reaction at the interface between a sulfide-based solid electrolyte and the positive electrode active material. A positive electrode active material particle for sulfide-based all-solid-state batteries, the surface of which is reformed, using the method and a sulfide-based all-solid-state battery, the charge/discharge characteristics of which are improved, including the same are also disclosed. The positive electrode active material particle for sulfide-based all-solid-state batteries manufactured using a dry-type method exhibits larger capacity than a positive electrode active material particle for sulfide-based all-solid-state batteries manufactured through a conventional wet-type process. In addition, the manufacturing process is simplified, and the amount of byproducts is reduced.

Abstract: A positive electrode active material, method of making the same, and positive electrode and lithium secondary battery include the same are disclosed herein. In some embodiments, a positive electrode active material in a form of single particles, includes a lithium transition metal oxide having nickel (Ni) in an amount greater than 50 mol % based on a total number of moles of transition metals excluding lithium, wherein a single particle has a region of 50 nm or less from a surface of the single particle along a center direction, and wherein a structure belonging to space group FD3-M and a structure belonging to space group Fm3m are formed in the region, and wherein a generation rate of fine powder having an average particle diameter (D50) of 1 ?m or less is in a range of 5% to 30% when the positive electrode active material is rolled at 650 kgf/cm2.

Abstract: Provided are various embodiments of a positive electrode for a secondary battery, which in one embodiment includes a first positive electrode material mixture layer formed on a positive electrode collector, and a second positive electrode material mixture layer formed on the first positive electrode material mixture layer, wherein the first positive electrode material mixture layer has an operating voltage of 4.25 V to 6.0 V and includes an active material for overcharge which generates lithium and gas during charge; a method of preparing such a positive electrode for a secondary battery; and a lithium secondary battery including such a positive electrode.

Abstract: Disclosed herein are a sulfide-based all-solid-state battery and a method of manufacturing the same, wherein the sulfide-based all-solid-state battery includes a positive electrode active material coated with a lithium niobate precursor, which is manufactured by a polyol process having low production cost, such that it improves safety and increases capacity of the sulfide-based all-solid-state battery.

Abstract: A positive electrode active material includes a center portion including a first lithium transition metal oxide with an average composition represented by Formula 1, Li1+a1(Nib1Coc1Mnd1Ale1M1f1)O2??[Formula 1] wherein, in Formula 1, ?0.1?a1?0.2, 0.8?b1<1.0, 0<c1?0.2, 0<d1?0.1, 0<e1?0.05, 0?f1?0.05, b1/c1?25, and b1/d1?20, and M1 includes at least one selected from the group consisting of Mg, Ti, Zr, Nb, and W, and a surface portion including a second lithium transition metal oxide with an average composition represented by Formula 2, Li1+a2(Nib2Coc2Mnd2Ale2M1f2)O2??[Formula 2] wherein, in Formula 2, ?0.1?a2?0.2, 0.6?b2?0.95, 0?c2?0.2, 0?d2?0.1, 0?e2?0.05, 0?f2?0.05, b2/c2?13, and b2/d2?3, and M1 includes at least one selected from the group consisting of Mg, Ti, Zr, Nb, and W.

Abstract: A method of preparing a positive electrode active material for a secondary battery includes preparing a lithium composite transition metal oxide which includes nickel, cobalt, and manganese and contains 60 mol % or more of the nickel among all metals except lithium, adding a moisture absorbent and the lithium composite transition metal oxide into an atomic layer deposition (ALD) reactor, and adding a coating metal precursor into the atomic layer deposition (ALD) reactor and forming a metal oxide coating layer on surfaces of particles of the lithium composite transition metal oxide by atomic layer deposition (ALD).

Abstract: The present disclosure relates to a cathode additive, a method for preparing the same, and a cathode and a lithium secondary battery including the same. More specifically, one embodiment of the present disclosure provides a cathode additive that can offset an irreversible capacity imbalance, increase the initial charge capacity of a cathode, and simultaneously inhibit the generation of a gas in a battery.

Abstract: A method of producing a positive electrode material for a secondary battery includes preparing a lithium composite transition metal oxide containing nickel, cobalt, and manganese, forming a coating layer on a surface of the lithium composite transition metal oxide, and post-treating the lithium composite transition metal oxide having the coating layer formed thereon, wherein the post-treating is performed by exposing the lithium composite transition metal oxide having the coating layer formed thereon to moisture at a relative humidity of 10% to 50% at 25° C., and then heat treating the lithium composite transition metal oxide to remove residual moisture.

Abstract: A positive electrode active material includes a lithium transition metal oxide, which is in the form of a secondary particle formed by aggregation of primary particles and is represented by Formula 1, wherein the lithium transition metal oxide has a crystalline size of 160 nm or less and an average particle diameter of the primary particle of 0.6 ?m or more. A preparation method thereof is also provided.

Abstract: A method of preparing a positive electrode active material includes preparing a lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, impregnating the lithium transition metal oxide with 300 ppm to 1,000 ppm of moisture based on 100 parts by weight of the lithium transition metal oxide, and performing a heat treatment on the lithium transition metal oxide impregnated with the moisture, wherein a lithium by-product present on a surface of the lithium transition metal oxide and the moisture react to form a passivation layer on the surface of the lithium transition metal oxide. A positive electrode active material prepared by the above-described preparation method, and a positive electrode and a lithium secondary battery which include the positive electrode active material are also provided.