Abstract: Provided is a cobalt precursor for preparing a lithium cobalt oxide of a layered structure which is included in a positive electrode active material, wherein the cobalt precursor is cobalt oxyhydroxide (CoM?OOH) doped with, as dopants, magnesium (Mg) and M? different from the magnesium.

Abstract: The present invention relates to positive electrode active material particles and a secondary battery including the same and provides positive electrode active material particles comprising: a core including a first lithium transition metal oxide; and a shell surrounding the core, wherein the shell has a form in which metal oxide particles are embedded in a second lithium transition metal oxide, and at least a part of the metal oxide particles is present by being exposed at a surface of the shell. The positive electrode active material particles according to the present invention prevent a transition metal and an electrolyte from causing a side reaction by exposing a part of a metal oxide, having low reactivity, at a surface of the active materials, thereby improving safety and lifespan. As the electrical conductivity of the active materials becomes lower, excellent stability can be maintained even at high temperature and in battery-breakdown situations.

Abstract: Provided is a cobalt precursor for preparing a lithium cobalt oxide of a layered structure which is included in a positive electrode active material, wherein the cobalt precursor is cobalt oxyhydroxide (CoM?OOH) doped with, as dopants, magnesium (Mg) and M? different from the magnesium.

Abstract: Provided is a positive electrode active material particle including a core containing lithium cobalt oxide represented by the following Chemical Formula 1; and a coating layer containing boron (B) and fluorine (F), which is coated on the surface of the core: Li1+xCo1?xO2??(1)

Abstract: A solid electrolyte film for sulfide-based all-solid-state batteries, and more particularly a composition of a solid electrolyte, a binder, and a solvent used to manufacture a solid electrolyte film for sulfide-based all-solid-state batteries that is thin and has high ion conductivity. In particular, a solid electrolyte film composition for sulfide-based all-solid-state batteries including a solvent having a dielectric constant of x (1.5<x<3.0). The thickness of a solid electrolyte film for sulfide-based all-solid-state batteries manufactured using the solid electrolyte film composition is 60 ?m or less, and the solid electrolyte film is capable of being stably used for at least 1000 hours or more, and up to 2000 hours, based on the evaluation of Li plating and stripping.

Abstract: A method for preparing a lithium cobalt-based positive electrode active material and a positive electrode active material prepared by the method are provided. The method includes dry-mixing and then heat treating a lithium cobalt oxide particle represented by Formula 1 and one or more lithium metal oxide particle selected from the group consisting of lithium aluminum oxide, lithium zirconium oxide, and lithium titanium oxide.

Abstract: Disclosed are a negative electrode active material including lithium titanium oxide particles, wherein the lithium titanium oxide particles have an average particle diameter (D50) of 0.5-9 ?m, a specific surface area of 3-7 m2/g, and a pellet density of 1.7 g/cc or more under a pressure of 64 MPa, and a lithium secondary battery including 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 lithium cobalt-based positive electrode active material is provided. The lithium cobalt-based positive electrode active material includes a core portion including a lithium cobalt-based oxide represented by Formula 1 and a shell portion including a lithium cobalt-based oxide represented by Formula 2, wherein the lithium cobalt-based positive electrode active material includes 2500 ppm or more, preferably 3000 ppm or more of a doping element M based on the total weight of the positive electrode active material. An inflection point does not appear in a voltage profile measured during charging/discharging a secondary battery including the lithium cobalt-based positive electrode active material.

Abstract: The present invention provides a positive electrode active material precursor for a secondary battery which includes primary particles of Co3O4 or Co0OH, 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 pm 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: 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: Provided is a positive electrode active material including lithium transition metal oxide for a lithium secondary battery, in which the lithium transition metal oxide includes a dopant diffusing from the surface of the lithium transition metal oxide particle, and the dopant is distributed with a concentration gradient from the center of the particle toward the surface thereof.

Abstract: In the present invention is provided a positive electrode active material for a secondary battery, wherein the positive electrode active material includes a core including a lithium composite metal oxide, and a surface treatment layer positioned on the surface of the core, and the surface treatment layer includes a porous coordination polymer in which a central metal ion is coordinate-bonded with an organic ligand such that high electrode density may be exhibited when an electrode is manufactured, and consequently, battery properties may be significantly enhanced. Also provided are a positive electrode, which is for a secondary battery and includes the positive electrode active material, and a secondary battery.

Abstract: The present invention provides a positive electrode active material comprising a lithium-rich lithium manganese-based oxide, wherein the lithium-rich lithium manganese-based oxide is represented by the following chemical formula (1), Li1+aNixCoyMnzMvO2?bAb??(1) wherein, 0<a?0.2, 0<x?0.4, 0<y?0.4, 0.5?z?0.9, 0?v?0.2, a+x+y+z+v=1, and 0?b?0.5; M is one or more elements selected from the group consisting of Al, Zr, Zn, Ti, Mg, Ga, In, Ru, Nb, and Sn; and A is one or more elements selected from the group consisting of P, N, F, S and Cl; wherein a coating layer containing a lithium-deficient transition metal oxide in a lithium-deficient state having a molar ratio of lithium to transition metal of less than 1 is formed on the surface of the lithium-rich lithium manganese-based oxide, and wherein the content of the coating layer is 1% to 10% by weight based on the total weight of the positive electrode active material, and a method for producing the same.

Abstract: A surface of a LiCoO2-based positive electrode active material to have a rock salt crystal structure is provided. Specifically, a positive electrode active material for a lithium rechargeable battery is provided, including: a core particle containing lithium cobalt oxide doped with aluminum (Al); and a coating layer positioned on a surface of the core particle and containing a cobalt(Co)-based compound having a rock salt crystal structure. A method of producing the positive electrode active material is also provided using a solid-phase method. The positive electrode active material can be applied to a positive electrode, lithium rechargeable battery, battery module, battery pack, and the like.

Abstract: A negative electrode active material including lithium titanium oxide particles, wherein the lithium titanium oxide particles have a Na content of 50 ppm-300 ppm, a K content of 500 ppm-2400 ppm and a crystallite size of 100-200 nm, and a lithium secondary battery including the same.

Abstract: Provided is a positive electrode active material particle for a secondary battery, including a core part containing lithium cobalt oxide; and a shell part that is located on the surface of the core part and contains lithium-deficient cobalt oxide which is deficient in lithium because a molar ratio of lithium to cobalt is 0.9 or less.

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: In one embodiment, the present disclosure relates to a positive electrode active material in which a lithium cobalt oxide is doped with a doping element including a metallic element and a halide element, wherein the positive electrode active material is represented by Formula 1 and satisfies Equation 1, and a positive electrode for a lithium secondary battery and a lithium secondary battery, either of which include the positive electrode active material: Li(Co1-x-y-zM1xM2yM3z)O2-aHa ??[Formula 1] (2x+3y+4z?a)/(x+y+z+a)<2.5.

Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery, and a lithium secondary battery including the same, and the positive electrode active material includes lithium cobalt oxide particles. The lithium cobalt oxide particles include lithium cobalt oxide having a Li/Co molar ratio of less than 1 in the particles. Good rate property and life property may be obtained without worrying on the deterioration of initial capacity property.