Abstract: A cathode active material, a preparation method thereof, and a cathode for a lithium secondary battery and a lithium secondary battery including the cathode active material, wherein the cathode active material includes a core active material represented by Formula 1 below; and a coating layer formed on a surface of the core active material, the coating layer including lithium gallium oxide: Lia(A1-x-yBxCy)O2 ??Formula 1 In Formula 1, a, x, y, A, B, and C are defined in the detailed description.

Abstract: A nickel (Ni)-based positive electrode active material, a method of preparing the same, and a lithium battery using the Ni-based positive electrode active material.

Abstract: A method for preparing a positive active material for a rechargeable lithium battery includes: a) providing a furnace and a crucible that is included in the furnace; b) putting a mixture of a composite metal precursor and a lithium compound into the crucible; and c) preparing a positive active material for a rechargeable lithium battery by firing the mixture in the crucible, wherein during the process b), the mixture in the crucible is positioned so that a minimum distance from a predetermined position inside the mixture to an exterior of the mixture in the crucible is about 5 cm or less. A rechargeable lithium made by this method is disclosed.

Abstract: A positive active material includes first and second lithium nickel complex oxides. A positive electrode and lithium battery include the positive active material. The positive active material, and the lithium battery including the positive active material have increased filling density, are thermally stable, and have improved capacity.

Abstract: A positive electrode active material for lithium batteries includes secondary particles having primary particles and an amorphous material. A method of manufacturing the positive electrode active material includes mixing a lithium composite oxide and a lithium salt, and heat treating the mixture. A positive electrode includes the positive electrode active material, and a lithium battery includes the positive electrode.

Abstract: In one aspect, a composite cathode active material including at least one large-diameter active material, and at least one small-diameter active material, a cathode including the composite cathode active material and a lithium battery including the cathode is provided.

Abstract: A positive active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery including the positive active material. The positive active material includes a core part and a shell part that include a nickel-based composite oxide, and a content of nickel in the core part is larger than that in the shell part.

Abstract: A method of preparing a positive active material for a rechargeable lithium battery including a) mixing a composite metal precursor and a lithium compound; b) firing the mixture to prepare a positive active material; c) mixing the resulting positive active material, a carbon coating material, and a solvent; and d) heat-treating the resulting mixture to provide a positive active material coated with the carbon coating material, wherein the carbon coating material is used in an amount of 1 wt % to 30 wt % based on 100 wt % of the composite metal precursor, lithium compound, and carbon coating material, the firing is performed at 400 to 900° C., and the positive active material provided in d) is represented by the following Chemical Formula 1, is provided. LiaNixCoyMnzM?kO2 ??[Chemical Formula 1] In Chemical Formula 1, each definition is the same as in the detailed description.

Abstract: In one aspect, a positive electrode active material is provided, a method of manufacturing the positive electrode active material, and a lithium battery employing the positive electrode active material. The positive electrode active material may have high thermal stability and low capacity deterioration despite repetitive charging and discharging.

Abstract: In one aspect, a positive active material is provided that may have increased thermal stability and resistance to capability deterioration due to repeated charging and discharging, a method of manufacturing the same, and a lithium battery that includes the positive active material.

Abstract: A positive active material of a positive electrode of a rechargeable lithium battery, the positive active material includes a core and a composite surrounding a surface of the core and including a phosphate-based compound and a carbon-based compound. The core being a nickel-based oxide having the chemical formula Lia(NixCoyMnz)2-aO2 where 1.01?a?1.2, 0.5?x?1, 0?y?0.5, and 0?z?0.5, the phosphate-based compound being one of Li3PO4, P2O5, H3PO4, (NH4)2HPO4, NH4H2PO4 and a combination thereof, the carbon-based compound being obtained from a precursor, the precursor being one of sucrose, denka black, carbon black and a combination thereof.

Abstract: A positive active material and a method of preparing a positive active material, and a lithium battery including the positive active material. In one embodiment, the positive active material includes single particles each being represented by Formula 1: Lix(NipCoqMnr)Oy, where, in Formula 1, 0.95?x?1.05, 0<p<1, 0<q<1, 0<r<1, p+q+r=1 and 0<y?2.025.

Abstract: A positive electrode plate, a method of manufacturing the same, and a lithium battery including the positive electrode plate are disclosed. The positive electrode plate comprises particles of a nickel-based composite oxide represented by Formula 1, wherein the particles have an average particle diameter D50 of about 10 ?m to about 20 ?m, wherein 1 wt % or less of the particles has a diameter of about 5 ?m or less, wherein Formula 1 is LiNixCoyMn1?x?yO2, and wherein 0<x<1.0, 0<y<1.0, and x+y<1.

Abstract: A positive active material, a method of preparing the same, and a lithium battery including the same.

Abstract: A nickel (Ni)-based positive electrode active material, a method of preparing the same, and a lithium battery using the Ni-based positive electrode active material.

Abstract: Disclosed are a positive active material for a lithium rechargeable battery and a lithium rechargeable battery using the same, and the positive active material is represented by the following Chemical Formula 1, and has an effective magnetic moment of about 2.4 ?B/mol or greater at a temperature of more than or equal to a Curie temperature. Chemical Formula 1: LiMeO2. In Chemical Formula 1, Me is NixCOyMnzM?k, 0.45?x?0.65, 0.15?y?0.25, 0.15?z?0.35, 0.9?a?1.2, 0?k?0.1, x+y+z+k=1, and M? is Al, Mg, Ti, Zr, or a combination thereof. The positive active material may have an a-axis lattice constant of the positive active material of about 2.865 ? or greater, and may have a c-axis lattice constant of the positive active material of about 14.2069 ? or greater. A mole ratio of Li to Me of Chemical Formula 1 may range from about 0.9 to about 1.2.

Abstract: A positive active material for a rechargeable lithium battery including a lithium metal oxide represented by the following Chemical Formula 1, a method of preparing the same, and a rechargeable lithium battery including the same. LiaMeM?kO2 ??Chemical Formula 1 In Chemical Formula 1, Me is NixCoyMnz, M? is Mg, Al, Fe, P, or a combination thereof, 0.955a<1.05, 0.001?k?0.1, 0.5<x?0.65, 0.1<y?0.25, 0.1<z?0.25, x+y+z+k=1, M? is doped at a Li site and at least one of Ni, Co, and Mn sites, M? is doped in an amount at 0.1 mol % or 10 mol % or between 0.1 mol % and 10 mol % based on the total amount of Ni, Co, and Mn, and a doping mole ratio of M? doped at the Li site with respect to a Me site is in the following range: about 0.001?ALi/AMe?about 0.5.

Abstract: Disclosed is a positive active material precursor for a secondary lithium battery, which is represented by the following Chemical Formula 1 and has an intensity ratio of I100/I001 of more than or equal to about 2 of the peak I100 of a (001) plane peak to the peak I001 of a (100) plane peak according to X-ray diffraction analysis, a W100/W001 ratio of less than about 2 of the full width at half maximum W100 of a (100) plane peak to the full width at half maximum W001 of a (001) plane peak according to X-ray diffraction analysis, and an S100/S001 ratio of less than or equal to about 0.265 of the area S001 of a (001) plane peak and the area S100 of a (100) plane peak according to X-ray diffraction analysis. [Chemical Formula 1] NixCoyMnzMk(OH)2 wherein, M is a metal, 0.45?x?0.65, 0.15?y?0.25, 0.15?y?0.35, 0?k?0.1, and x+y+z+k=1.

Abstract: A positive active material for a rechargeable lithium battery includes pores having an average diameter of about 10 nm to about 60 nm and a porosity of about 0.5% to about 20%. Also disclosed is a method of preparing the positive active material, and a rechargeable lithium battery including the positive active material.

Abstract: A method for preparing a positive active material for a rechargeable lithium battery includes: a) providing a furnace and a crucible that is included in the furnace; b) putting a mixture of a composite metal precursor and a lithium compound into the crucible; and c) preparing a positive active material for a rechargeable lithium battery by firing the mixture in the crucible, wherein during the process b), the mixture in the crucible is positioned so that a minimum distance from a predetermined position inside the mixture to an exterior of the mixture in the crucible is about 5 cm or less. A rechargeable lithium made by this method is disclosed.