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: 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 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: 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: 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 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: A plasma display panel is provided having a first substrate and a second substrate facing the first substrate with an interval therebetween. An address electrode extends in a first direction on the first substrate. A dielectric layer is on the first substrate covering the address electrode. One or more barrier ribs are on the dielectric layer to define a discharge cell in relation to the address electrode. A phosphor layer is in the discharge cell. A first electrode and a second electrode extend in a second direction on the second substrate corresponding to the discharge cell. The second direction crosses the first direction. The dielectric layer includes a flat surface facing the discharge cell.

Abstract: A character learning apparatus for preschool children and a method for driving the same are disclosed. The apparatus can be easily handle by preschool children. The apparatus originally prevents breakdown sources due to electrically bad contact because the apparatus does not need electrical contact to install elements thereto.

Abstract: The present invention discloses a dielectric ceramic composition having a formula represented by (1−x)Nd(Ga1−yAly)O3-xCaTiO3, wherein x refers a mole fraction of CaTiO3 to the composition and satisfies an expression of 0.5≦x≦0.8, and y refers a mole fraction of Al to Ga and satisfies an expression of 0≦y≦0.9. The present dielectric substance has a high dielectric constant and a high Q value and a resonant frequency temperature coefficient of near 0. Also, it can be sintered at a low temperature and thus replace the conventional dielectric materials used as a filter for parts of mobile communication or satellite communication appliances.

Abstract: The present invention discloses a dielectric ceramic composition having a formula represented by (1−x)Nd(Ga1−yAly)O3−xCaTiO3, wherein x refers a mole fraction of CaTiO3 to the composition and satisfies an expression of 0.5≦x≦0.8, and y refers a mole fraction of Al to Ga and satisfies an expression of 0≦y≦0.9.