Abstract: A lithium secondary battery active material in which lithium titanate that can supply excellent rapid charge and discharge characteristics to a lithium secondary battery when used as a negative electrode active material of the lithium secondary battery is used, and a lithium secondary battery that is manufactured using the lithium secondary battery active material and is excellent in terms of, particularly, rapid charge and discharge characteristics. The lithium secondary battery active material of the invention is composed of lithium titanate which has a spinel structure, has a content of sulfate radicals of 100 ppm to 2500 ppm in terms of sulfur atoms and a content of chlorine of 1500 ppm or less, and is expressed by a general formula LixTiyO12 (however, in the formula, the atomic ratio of Li/Ti is 0.70 to 0.90, x satisfies 3.0?x?5.0, and y satisfies 4.0?y?6.0).

Abstract: An anode active material for lithium secondary batteries including lithium titanate represented by the following general formula (1): LixTiyO12 (1) (wherein x and y satisfy 3.0?x?5.0, 4.0?y?6.0 and 0.70?x/y?0.90), and a magnesium compound.

Abstract: A high power lithium-ion secondary battery having an increased capacity and capable of maintaining high discharge voltage and repeating charging/discharging high current. A lithium-ion secondary battery having an electrode group formed by laminating or winding a negative electrode layer and a positive electrode layer so as to interpose a separator made of synthetic resin, the negative electrode layer containing a material capable of intercalating/deintercalating lithium-ion, and the positive electrode layer including a lithium-containing metallic oxide; and a non-aqueous electrolyte containing lithium salt, where the electrode group is immersed. The positive electrode material unit contains a fluorinated lithium-containing metallic oxide as a main material, and the separator possesses a hydrophilic group. Further, the positive electrode material preferably contains a main material including LiNixCoyMnzO2, where 0.6?x<1, 0<y?0.2, 0<z?0.2, and x+y+z=1.

Abstract: It is an object of the present invention to provide a cathode active material capable of reducing degradation in an operation voltage and capacity as compared conventionally when used for a lithium ion secondary battery, and a method for manufacturing the same. The cathode active material contains a composite oxide of lithium and a transition metal (s), wherein a reduction loss of TLC in the composite oxide is 20 to 60%. Also, the composite oxide has a particle diameter of 0.5 to 100 ?m, and is preferably fluorinated. The method for manufacturing the cathode active material includes the step of fluorinating the cathode active material. The composite oxide has a particle diameter of 0.5 to 100 ?m. The fluorinating step is to fluorinate the composite oxide in a reaction vessel under conditions where fluorine gas partial pressure is 1 to 200 kPa, a reaction time is 10 minutes to 10 days, and a reaction temperature is ?10 to 200° C.

Abstract: A high power lithium-ion secondary battery having an increased capacity and capable of maintaining high discharge voltage and repeating charging/discharging high current. A lithium-ion secondary battery having; an electrode group formed by laminating or winding a negative electrode layer and a positive electrode layer so as to interpose a separator made of synthetic resin, the negative electrode layer containing a material capable of intercalating/deintercalating lithium-ion, and a positive electrode layer including a lithium-containing metallic oxide; and a non-aqueous electrolyte containing lithium salt, where the electrode group is immersed. The positive electrode material unit contains a fluorinated lithium-containing metallic oxide as a main material, and the separator possesses a hydrophilic group. Further, the positive electrode material preferably contains a main material including LiNixCoyMnzO2, where 0.4?x?1, 0?y?0.2, 0?z 0.2, x+y+z=1.