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, and 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: Provided are a metal element-doped positive electrode active material for a high voltage and a preparation method thereof. The positive electrode active material may include a lithium cobalt oxide having a layered crystal structure; and a metal element (M) incorporated into the lithium cobalt oxide in an amount of 0.2 parts by weight to 1 part by weight with respect to 100 parts by weight of the lithium cobalt oxide, wherein the metal element (M) does not form a chemical bond with the elements of the lithium cobalt oxide, and wherein the layered crystal structure in maintained at a positive electrode potential of more than 4.5 V (based on Li potential) when fully charged.

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 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: A device for preparing a lithium composite transition metal oxide includes first and second mixers continuously arranged in a direction in which a fluid proceeds, wherein the first mixer has a closed structure including a hollow fixed cylinder, a rotating cylinder having the same axis as that of the hollow fixed cylinder and having an outer diameter that is smaller than an inner diameter of the fixed cylinder, an electric motor to generate power for rotation of the rotating cylinder, a rotation reaction space, as a separation space between the hollow fixed cylinder and the rotating cylinder, in which ring-shaped vortex pairs periodically arranged along a rotating shaft and rotating in opposite directions are formed, first inlets through which raw materials are introduced into the rotation reaction space, and a first outlet to discharge a reaction fluid formed from the rotation reaction space.

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 of the present invention includes lithium cobalt oxide particles; and a surface treatment layer positioned on a surface of the lithium cobalt oxide particle, and the lithium cobalt oxide particle includes lithium deficient lithium cobalt oxide having a Li/Co molar ratio of less than 1, included in an Fd-3m space group, and having a cubic-type crystal structure, in a surface side of the particle. The surface treatment layer includes at least one element selected from the group consisting of transition metals and elements in group 13.

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: 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: 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: The present invention provides a positive electrode active material for a secondary battery, a positive electrode for a secondary battery, and a secondary battery including the same, the positive electrode active material including a first lithium-nickel oxide particle having an average particle size (D50) of more than 8 ?m to 20 ?m or less, and a second lithium-nickel oxide particle having an average particle size (D50) of 8 ?m or less, wherein the first lithium-nickel oxide particle has a particle strength of 100 MPa to 250 MPa, the second lithium-nickel oxide particle has a particle strength of 50 MPa to 100 MPa, a ratio r of the strength of the first lithium-nickel oxide particle to the strength of the second lithium-nickel oxide particle satisfies Equation 1 set forth herein.

Abstract: The present disclosure relates to a cathode active material for a lithium secondary battery with improved rate characteristics in which a spinel surface structure is formed by fluorine coating on a surface of layered lithium nickel-manganese-cobalt cathode active material and a method for manufacturing the same, and according to the present disclosure, there is provided a lithium secondary battery with improved rate characteristics that may be charged to a capacity close to a full charge in a short time when compared to a related art and thus is suitable for high capacity of a secondary battery.

Abstract: A positive electrode active material particle includes a core that contains lithium cobalt oxide represented by the following Chemical Formula LiaCo(1-x)MxO2-yAy and a shell that is coated on the surface of the core and contains composite metal oxide of a metal with an oxidation number of +2 and a metal with an oxidation number of +3. In particular, M is at least one selected from the group consisting of Ti, Mg, Zn, Si, Al, Zr, V, Mn, Nb and Ni. A is oxygen-substitutional halogen and 1.00?a?1.05, 0?x?0.05, and 0?y?0.001.

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: 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: 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: Disclosed is a hydrothermal synthesis device for continuously preparing an inorganic slurry using a hydrothermal method. The hydrothermal synthesis device includes a mixer to mix at least one precursor solution for preparing an inorganic material, injected via at least one supply tube, to prepare an intermediate slurry, a connection tube provided at a side of the mixer, continuously discharging the prepared intermediate slurry to a reactor, and having an inner surface contacting a precursor solution mixture on which abrasive polishing has been performed, and the reactor performing hydrothermal reaction of the intermediate slurry supplied from the connection tube by receiving a liquid stream heated to supercritical or subcritical conditions using a heat exchanger and connected to the connection tube into which the intermediate slurry prepared from the mixer is introduced and to at least one injection tube into which the heated liquid stream is injected.

Abstract: Disclosed is a hydrothermal synthesis device for continuously preparing an inorganic slurry using a hydrothermal method. The hydrothermal synthesis device includes a mixer to mix at least one precursor solution for preparing an inorganic material, injected via at least one supply tube, to prepare an intermediate slurry, a connection tube provided at a side of the mixer, continuously discharging the prepared intermediate slurry to a reactor, and having a hydrophobic coating on an inner surface of a portion thereof adjacent to the reactor, and the reactor performing hydrothermal reaction of the intermediate slurry supplied from the connection tube by receiving a liquid stream heated to supercritical or subcritical conditions using a heat exchanger and connected to the connection tube into which the intermediate slurry prepared from the mixer is introduced and to at least one injection tube into which the heated liquid stream is injected.

Abstract: Provided are a Si/C composite, in which carbon (C) is dispersed in an atomic state in a silicon (Si) particle, and a method of preparing the Si/C composite. Since the Si/C composite of the present invention is used as an anode active material, electrical conductivity may be further improved and volume expansion may be minimized. Thus, life characteristics of a lithium secondary battery may be improved.

Abstract: A positive electrode active material of the present invention includes lithium cobalt oxide particles; and a surface treatment layer positioned on a surface of the lithium cobalt oxide particle, and the lithium cobalt oxide particle includes lithium deficient lithium cobalt oxide having a Li/Co molar ratio of less than 1, included in an Fd-3m space group, and having a cubic-type crystal structure, in a surface side of the particle. The surface treatment layer includes at least one element selected from the group consisting of transition metals and elements in group 13.