Abstract:
A cobalt oxide for a lithium secondary battery, a method of preparing the cobalt oxide; a lithium cobalt oxide for a lithium secondary battery formed from the cobalt oxide; and a lithium secondary battery having a positive electrode including the lithium cobalt oxide, the cobalt oxide having a tap density of about 2.8 g/cc to about 3.0 g/cc, and an intensity ratio of about 0.8 to about 1.2 of a second peak at 2θ of about 31.3±1° to a first peak at 2θ of about 19±1° in X-ray diffraction spectra, as analyzed by X-ray diffraction.
Abstract:
A cobalt oxide for a lithium secondary battery, a lithium cobalt oxide, an associated method, and a lithium secondary battery, wherein the cobalt oxide composition includes particles having a particle strength of about 25 MPa to about 50 MPa, has a particle diameter D10 of about 14 μm to about 18 μm, and has a particle diameter difference between a particle diameter D90 and the particle diameter D10 of less than about 15 μm.
Abstract:
Provided are a positive active material, lithium batteries including the positive active material, and a method of preparing the positive active material. The positive electrode active material, includes a core including a compound capable of reversibly performing intercalation or deintercalation of lithium ions; and a coating layer including an inorganic material adhered to at least a portion of a surface of the core, the inorganic material having an apatite structure.
Abstract:
A composite positive electrode active material includes a lithium transition metal oxide represented by at least one of LiNixCoyMnzO2 (Formula 1) and aLi2MnO3.(1−a)LiMO2 (Formula 2). In Formula 1, and a vanadium-based compound including a polyanion. In Formula 1, 0
Abstract:
A positive active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The positive active material includes a lithium intercalation compound and a Si-containing TiO2 present on the surface of the compound. When TiO2 is present on the surface of the lithium intercalation compound, the rate characteristics and low temperature characteristics of batteries including the lithium intercalation compound may be improved. Further, when Si-containing TiO2 is present on the surface of the lithium intercalation compound, the cycle-life characteristic and high temperature storage characteristics of batteries including the lithium intercalation compound may be further improved, compared to batteries having only TiO2. As such, the positive active material including Si-containing TiO2 provides a rechargeable lithium battery having excellent rate capability, low temperature characteristics, cycle-life characteristics and high temperature storage characteristics.
Abstract:
A cobalt oxide for a lithium secondary battery, a method of preparing the cobalt oxide; a lithium cobalt oxide for a lithium secondary battery formed from the cobalt oxide; and a lithium secondary battery having a positive electrode including the lithium cobalt oxide, the cobalt oxide having a tap density of about 2.8 g/cc to about 3.0 g/cc, and an intensity ratio of about 0.8 to about 1.2 of a second peak at 2θ of about 31.3±1° to a first peak at 2θ of about 19±1° in X-ray diffraction spectra, as analyzed by X-ray diffraction.
Abstract:
A secondary battery which can improve safety is provided. The secondary battery includes an electrode assembly, a can accommodating the electrode assembly and a cap assembly coupled to a top portion of the can, wherein the cap assembly comprises a cap-up, a safety vent installed under the cap-up, a cap-down installed under the safety vent, an insulator interposed between the safety vent and the cap-down, and a sub-plate positioned on a bottom surface of the cap-down, and an insulation layer is formed on a top surface of the cap-down.