Abstract: A positive electrode active material precursor, a method of preparing the same, a positive electrode for a secondary battery and a lithium secondary battery which include the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material precursor includes adding a transition metal aqueous solution, an ammonium ion-containing solution, and a basic aqueous solution to an initial reaction solution, and performing a co-precipitation reaction to prepare a positive electrode active material precursor having an average particle diameter (D50) of 3 ?m to 5 ?m, wherein the transition metal aqueous solution including a nickel raw material, a cobalt raw material, and a manganese raw material, and wherein the initial reaction solution includes a metal additive, wherein the metal additive includes at least one element selected from the group consisting of Group 5 elements and Group 6 elements.

Abstract: A method for producing a positive electrode active material process which can minimize deterioration, occurring in a washing process, on the surface of a positive electrode active material and effectively control residual lithium. The method includes (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a washing solution, washing the mixture, and then drying the mixture, wherein the washing solution contains a phosphorus-based compound and is a basic solution, and the phosphorus-based compound is contained in the washing solution such that the amount of phosphorus is 100-1,000 ppm in weight based on the lithium transition metal oxide, and to a positive electrode active material produced by the method.

Abstract: A method of preparing a positive electrode active material and a positive electrode active material prepared by the same are disclosed herein. The method is capable of reducing an amount of a water-washing solution used, minimizing surface deterioration of the positive electrode active material, and effectively controlling residual lithium. In some embodiments, a method includes: performing a first water-washing of a lithium transition metal oxide in a first water-washing solution, performing a first filtering to separate the lithium transition metal oxide from the first water-washing solution, and performing, concurrently, a second water-washing and a second filtering of the lithium transition metal oxide with a second water-washing solution using a filtering device capable of concurrently water-washing and filtering, wherein the second water-washing solution is in an amount of 10 parts by weight to 50 parts by weight with respect to 100 parts by weight of the first water-washing solution.

Abstract: A positive electrode active material, a method of preparing the same, a positive electrode and a lithium secondary battery including the same are disclosed herein. In some embodiments, a positive electrode active material including a lithium transition metal oxide which contains 60 mol % or more of nickel based on a total number of moles of transition metals excluding lithium in the lithium transition metal oxide, is in a form of a secondary particle which is an aggregate of primary particles, wherein the lithium transition metal oxide satisfies Equation 1: 2 ? 0 < x y wherein x is a minimum area of a rectangle including all pores having an area greater than 0.002 ?m2 among closed pores distributed in the secondary particle, and y is a total sum of areas of the pores having an area greater than 0.002 ?m2 among the closed pores distributed in the secondary particle.

Abstract: The method of preparing a positive electrode capable of reducing the usage amount of a rinsing solution, and minimizing the surface degradation of a positive electrode active material is provided. A method of preparing a positive electrode active material includes: (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a rinsing solution and performing rinsing and drying, wherein the rinsing solution includes one or more additive of LiOH, NaOH, or KOH, the additive is included in an amount of 3,000 ppm to 18,000 ppm relative to the lithium transition metal oxide in the rinsing solution, and the rinsing solution has a pH of 12 or more.

Abstract: Provided is a positive electrode active material for a secondary battery which includes a composite coating layer formed on a surface of lithium composite transition metal oxide particles, wherein the composite coating layer includes a ferroelectric material and a boron-based oxide containing boron.

Abstract: A positive electrode active material contains a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, wherein a zirconium-containing coating film is formed on the surface of the lithium transition metal oxide secondary particle and at the interface between the primary particles present inside the secondary particle. A method of making the positive electrode active material is also provided.

Abstract: A positive electrode active material for a secondary battery and a method of making the same are disclosed herein. In some embodiments, a positive electrode active material includes lithium composite transition metal oxide particles including 70 mol % or more of nickel (Ni) among total metals excluding lithium, and a coating portion formed on surfaces of the lithium composite transition metal oxide particles, wherein the coating portion includes a compound including fluorine and at least one selected from the group consisting of aluminum (Al), titanium (Ti), magnesium (Mg), zirconium (Zr), tungsten (W), and strontium (Sr), wherein the positive electrode active material has a Brunauer-Emmett-Teller (BET) specific surface area is in a range of 0.1 m2/g to 0.9 m2/g, and an amount of a lithium by-product on a surface of the positive electrode active material is 0.65 wt % or less based on a total weight of the positive electrode active material.

Abstract: A positive electrode active material precursor, a method of preparing the same, a positive electrode for a secondary battery and a lithium secondary battery which include the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material precursor includes adding a transition metal aqueous solution, an ammonium ion-containing solution, and a basic aqueous solution to an initial reaction solution, and performing a co-precipitation reaction to prepare a positive electrode active material precursor having an average particle diameter (D50) of 3 ?m to 5 ?m, wherein the transition metal aqueous solution including a nickel raw material, a cobalt raw material, and a manganese raw material, and wherein the initial reaction solution includes a metal additive, wherein the metal additive includes at least one element selected from the group consisting of Group 5 elements and Group 6 elements.