Abstract: Provided is a positive electrode active material particle including a core that includes lithium cobalt oxide represented by the following Chemical Formula 1; and a shell that is located on the surface of the core and includes lithium cobalt phosphate represented by the following Chemical Formula 2, wherein the shell has a tetrahedral phase: LiaCo(1-x)MxO2-yAy??(1) wherein M is at least one of Ti, Mg, Zn, Si, Al, Zr, V, Mn, Nb, or Ni, A is oxygen-substitutional halogen, and 0.95?a?1.05, 0?x?0.2, 0?y?0.2, and 0?x+y?0.2, LibCoPO4??(2) wherein 0?b?1.

Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery including a lithium cobalt oxide having a core-shell structure, wherein the lithium cobalt-doped oxide of the core and the lithium cobalt-doped oxide of the shell include each independently three kinds of dopants and satisfy specific conditions, a method for producing the same, and a positive electrode and a secondary battery containing the positive electrode active material.

Abstract: The present invention relates to a method for recovering a positive electrode active material from a lithium secondary battery including: 1) separating a positive electrode into a collector and a positive electrode part; 2) removing an organic substance by firing the separated positive electrode part; 3) washing the fired resultant and removing remaining fluorine (F); 4) adding a lithium-containing material into the washed resultant and firing to recover a lithium transition metal oxide.

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: A positive electrode material for a lithium secondary battery according to the present invention includes a first positive electrode active material and a second positive electrode active material, wherein the first positive electrode active material and the second positive electrode active material are lithium composite transition metal oxides containing transition metals such as nickel (Ni), cobalt (Co) and manganese (Mn), the first positive electrode active material has a larger average particle size (D50) than the second positive electrode active material, a ratio (Li/Me)1 of the mole number of lithium with respect to the total mole number of transition metals of the first positive electrode active material is more than 1 to 1.5 or less, a ratio (Li/Me)2 of the mole number of lithium (Li) with respect to the total mole number of transition metals of the second positive electrode active material is 0.9 to 1, and the second positive electrode active material has a crystallite size of 180 nm or more.

Abstract: A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), and a glassy coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the nickel (Ni) in a total amount of transition metals is 60 mol % or more, and an amount of the manganese (Mn) is greater than an amount of the cobalt (Co), and the glassy coating layer includes a glassy compound represented by Formula 1. LiaM1bOc??[Formula 1] wherein, M1 is at least one selected from the group consisting of boron (B), aluminum (Al), silicon (Si), titanium (Ti), and phosphorus (P), and 1?a?4, 1?b?8, and 1?c?20.

Abstract: A lithium cobalt-based positive electrode active material is provide, which includes sodium and calcium, wherein the total amount of the sodium and calcium is 150 ppm to 500 ppm based on the total weight of the lithium cobalt-based positive electrode active material. A method for preparing the lithium cobalt-based positive electrode active material is also provided.

Abstract: The present invention relates to a positive electrode active material for a secondary battery which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide includes the nickel (Ni) in an amount of 65 mol % or more and the manganese (Mn) in an amount of 5 mol % or more based on a total amount of transition metals, and wherein the electrode positive active material is composed of a single particle, having a crystallite size of 180 nm or more.

Abstract: A positive electrode active material precursor is provided, which includes a transition metal hydroxide particle represented by Formula 1 and a cobalt oxide particle and a manganese oxide particle attached to the surface of the transition metal hydroxide particle. A preparation method thereof, a positive electrode active material prepared using the same, a positive electrode including the positive electrode active material, and a secondary battery including the positive electrode are also provided.

Abstract: The present invention provided a positive electrode active material for a lithium secondary battery including lithium cobalt oxide particles. The lithium cobalt oxide particles include lithium deficient lithium cobalt oxide having Li/Co molar ratio of less than 1, belongs to an Fd-3m space group, and having a cubic crystal structure, in surface of the particle and in a region corresponding to a distance from 0% to less than 100% from the surface of the particle relative to a distance (r) from the surface to the center of the particle. In the positive electrode active material for a lithium secondary battery according to the present invention, the intercalation and deintercalation of lithium at the surface of a particle may be easy, and the output property and rate characteristic may be improved when applied to a battery.

Abstract: Disclosed is a lithium-cobalt based complex oxide represented by Formula 1 below including lithium, cobalt and manganese wherein the lithium-cobalt based complex oxide maintains a crystal structure of a single O3 phase at a state of charge (SOC) of 50% or more based on a theoretical amount: LixCo1-y-zMnyAzO2??(1) wherein 0.95?x?1.15, 0<y?0.3 and 0?z?0.2; and A is at least one element selected the group consisting of Al, Mg, Ti, Zr, Sr, W, Nb, Mo, Ga, and Ni, wherein the at least one element of A is Mg.

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.

Abstract: Disclosed are a cathode additive of a lithium secondary battery which may have improved crystallinity and a method for preparing the same. The cathode additive may be provided to suppress generation of oxygen gas or gelation of an electrode slurry composition, which may occur due to reduction in the content of residual by-products containing lithium oxide.

Abstract: Provided are positive electrode active material particles for a secondary battery which include a lithium cobalt oxide, a coating layer including element A and formed on a surface of particles of the lithium cobalt oxide, and a dopant containing element B which is substituted in the lithium cobalt oxide, wherein the element A and the element B are each independently at least one selected from the group consisting of aluminum (Al), titanium (Ti), magnesium (Mg), zirconium (Zr), barium (Ba), calcium (Ca), tantalum (Ta), niobium (Nb), and molybdenum (Mo), and a molar ratio of the element A in the coating layer:the element B of the dopant is greater than 1:1 to 10:1.

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: A method for positive electrode active material for a secondary battery includes preparing a precursor by reacting a nickel raw material, a cobalt raw material and an M1 raw material; forming a first surface-treated layer including an oxide of Formula 2 below, on a surface of a core including a lithium composite metal oxide of Formula 1 below, by mixing the precursor with a lithium raw material and an M3 raw material, firing the resultant mixture; and forming a second surface-treated layer including a lithium compound of Formula 3 below, on the core with the first surface-treated layer formed thereon, LiaNi1?x?yCoxM1yM3zM2wO2??[Formula 1] LimM4O(m+n)/2??[Formula 2] LipM5qAr??[Formula 3] wherein, in Formulae 1 to 3, A, M1 to M5, a, x, y, z, w, m, n, p, and q are the same as those defined in the specification.

Abstract: An electrode includes an electrode active material, wherein the electrode active material layer includes an electrode active material, polyvinylidene fluoride, and a conductive agent, wherein the 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 same, and a method of preparing the electrode are also provided.

Abstract: A positive electrode active material includes a lithium transition metal oxide, which is doped with doping element M2, wherein M2 is at least one selected from the group consisting of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, and B, and contains nickel in an amount of 60 mol % or more based on a total number of moles of transition metals excluding lithium, 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 doping element M2 is included in an amount of 3,580 ppm to 7,620 ppm based on a total weight of the positive electrode active material.

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.