Abstract: The present invention provides a positive electrode active material for lithium ion battery which has a high capacity and good rate characteristics can be provided. The positive electrode active material for lithium ion battery has a layer structure represented by the compositional formula: Lix(NiyM1-y)Oz (wherein M represents at least one type selected from the group consisting of Mn, Co, Al, Mg, Cr, Ti, Fe, Nb, Cu and Zr, x denotes a number from 0.9 to 1.2, y denotes a number from 0.80 to 0.90, and z denotes a number of 1.9 or more), wherein the coordinates of the lattice constant a and compositional ratio (Li/M) are within the region enclosed by four lines given by the equations: y=1.01, y=1.10, x=2.8748, and x=2.87731 on a graph in which the x-axis represents a lattice constant a and the y-axis represents a compositional ratio (Li/M) of Li to M, and the lattice constant c is 14.2 to 14.25.

Abstract: The present invention provides a positive electrode active material for a lithium ion battery with excellent battery characteristics can be provided. The positive electrode active material for a lithium ion battery is represented by the following composition formula: Li(LixNi1-x-yMy)O2+? (in the formula, M represents at least one selected from Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Al, Bi, Sn, Mg, Ca, B, and Zr, 0?x?0.1, 0<y?0.7, and ?>0).

Abstract: The present invention provides a method for producing a positive electrode active material for lithium ion battery, having excellent tap density, at excellent production efficiency, and a positive electrode active material for lithium ion battery. The method for producing a positive electrode active material for lithium ion battery including a step of conducting a main firing after increasing mass percent of all metals in lithium-containing carbonate by 1% to 105% compared to the mass percent of all metals before a preliminary firing, by conducting the step of a preliminary firing to the lithium-containing carbonate, which is a precursor for positive electrode active material for lithium ion battery, with a rotary kiln.

Abstract: The present invention provides a positive electrode active material for a lithium ion battery with excellent battery characteristics can be provided. The positive electrode active material for a lithium ion battery is represented by the following composition formula: LixNi1?yMyO2+? (in the formula, M represents at least one selected from Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Al, Bi, Sn, Mg, Ca, B, and Zr, 0.9?x?1.2, 0<y?0.7, and ?>0.1).

Abstract: The present invention provides a positive electrode active material for lithium ion batteries having excellent rate performance. The positive electrode active material for lithium ion batteries having a layered structure is represented by composition formula: Lix(NiyM1-y)Oz, wherein M is Mn and Co, x is 0.9 to 1.2, y is 0.6 to 0.9, z is 1.8 to 2.4. D2/D1 is 1.065 or less, D1 being defined as the density of the positive electrode active material when powder of the positive electrode active material is pressed under the pressure of 100 MPa, and D2 being defined as the density of the positive electrode active material when powder of the positive electrode active material is pressed under the pressure of 300 MPa.

Abstract: A lithium-manganese composite oxide for a lithium ion battery having a good cycle property at high-temperature and battery property of high capacity is provided. A spinel type lithium-manganese composite oxide for a lithium ion battery represented by a general formula: Li1+xMn2-yMyO4 (wherein M is one or more elements selected from Al, Mg, Si, Ca, Ti, Cu, Ba, W and Pb, and, ?0.1?x?0.2, and 0.06?y?0.3), and when D10, D50 and D90 are defined as a particle size at which point the cumulative frequency of volume reaches 10%, 50% and 90% respectively, d10 is not less than 2 ?m and not more than 5 ?M, d50 is not less than 6 ?m and not more than 9 ?m, and d90 is not less than 12 ?m and not more than 15 ?M, and BET specific surface area thereof is greater than 1.0 m2/g and not more than 2.0 m2/g, and the tap density thereof is not less than 0.5 g/cm3 and less than 1.0 g/cm3.

Abstract: Disclosed is a positive electrode active material that provides an improved capacity density. Specifically disclosed is a positive electrode active material for a lithium ion battery with a layered structure represented by Lix(NiyM1-y)Oz (wherein M represents at least one element selected from a group consisting of Mn, Co, Mg, Al, Ti, Cr, Fe, Cu, and Zr; x is in the range from 0.9 to 1.2; y is in the range from 0.3 to 0.95; and z is in the range from 1.8 to 2.4), wherein, when a value obtained by dividing an average of peak intensities observed between 1420 and 1450 cm?1 and between 1470 and 1500 cm?1 by the maximum intensity of a peak appearing between 520 and 620 cm?1 in an infrared absorption spectrum obtained by FT-IR is represented by A, A satisfies the following relational formula: 0.20y?0.05?A?0.53y?0.06.

Abstract: Proposed are a lithium-containing transition metal oxide target formed from a sintered compact of lithium-containing transition metal oxides showing a hexagonal crystalline system in which the sintered compact has a relative density of 90% or higher and an average grain size of 1 ?m or greater and 50 ?m or less, and a lithium-containing transition metal oxide target formed from a sintered compact of lithium-containing transition metal oxides showing a hexagonal crystalline system in which the intensity ratio of the (003) face, (101) face and (104) face based on X-ray diffraction using CuK? ray satisfies the following conditions: (1) Peak intensity ratio of the (101) face in relation to the (003) face is 0.4 or higher and 1.1 or lower; and (2) Peak ratio of the (101) face in relation to the (104) face is 1.0 or higher.

Abstract: Provided is a positive electrode active material for a lithium ion battery positive electrode material made of lithium-containing nickel-manganese-cobalt composite oxide of a layered structure represented with LiaNixMnyCozO2 (1.0<a<1.3, 0.8<x+y+z<1.1), wherein, in a region with a molar volume Vm that is estimated from a lattice constant calculated from a (018) plane and a (113) plane in a powder X-ray diffraction pattern using CuK alpha rays as a vertical axis and Co ratio z (molar %) in metal components as a horizontal axis, the relationship thereof is within a range of Vm=21.276-0.0117z as an upper limit and Vm=21.164-0.0122z as a lower limit, and a half value width of both the (018) plane and the (113) plane is 0.200° or less. As a result of studying and defining the relationship of the cobalt (Co) ratio and the lattice constant, which are considered to influence the crystal structure, obtained was a positive electrode active material having high crystallinity, high capacity and high security.

Abstract: Provided is a cathode material for a lithium secondary battery composed of an aggregate of Li-A-O composite oxide particles (wherein A represents one or more metal elements selected from Mn, Fe, Co and Ni), wherein the lithium composite oxide contains 20 to 100 ppm (by mass) of P, and the total content of impurity elements excluding essential components is 2000 ppm or less. Also provided is a manufacturing method of such a cathode material for a lithium secondary battery including the steps of suspending lithium carbonate in water and thereafter introducing a metallic salt solution of one or more metal elements selected from Mn, Fe, Co and Ni in the lithium carbonate suspension, adding a small amount of phosphoric acid so that the P content in the Li-A-O composite oxide particles will be 20 to 100 ppm (by mass), and forming an aggregate of Li-A-O composite oxide particles containing 20 to 100 ppm (by mass) of P by filtering, cleansing, drying and thereafter oxidizing the obtained carbonate.

Abstract: A lithium-manganese composite oxide for a lithium ion battery having a good cycle property at high-temperature and battery property of high capacity is provided. A spinel type lithium-manganese composite oxide for a lithium ion battery represented by a general formula: Li1+xMn2?yMyO4 (wherein M is one or more elements selected from Al, Mg, Si, Ca, Ti, Cu, Ba, W and Pb, and, ?0.1?x?0.2, and 0.06?y?0.3), and when D10, D50 and D90 are defined as a particle size at which point the cumulative frequency of volume reaches 10%, 50% and 90% respectively, d10 is not less than 2 ?m and not more than 5 ?m, d50 is not less than 6 ?m and not more than 9 ?m, and d90 is not less than 12 ?m and not more than 15 ?m, and BET specific surface area thereof is greater than 1.0 m2/g and not more than 2.0 m2/g, and the tap density thereof is not less than 0.5 g/cm3 and less than 1.0 g/cm3.

Abstract: This invention provides a lithium nickel manganese cobalt composite oxide having a composition of LiaNixMnyCozO2 (x+y+z=1, 1.05<a<1.3), wherein, in the data obtained by measuring a Raman spectrum of the composite oxide, the peak intensity of an Eg oscillation mode of a hexagonal crystal structure located at 480 to 495 cm?1 and the peak intensity of an F2g oscillation mode of a spinel structure located at 500 to 530 cm?1 in relation to the peak intensity of an A1g oscillation mode having a hexagonal crystal structure in which the main peak is located at 590 to 610 cm?1 are respectively 15% or higher and 40% or lower than the peak intensity of the A1g oscillation mode of a hexagonal crystal structure as the main peak. Thereby, the Raman spectrum can be used for the identification of the crystal structure to clarify the characteristics of a positive electrode precursor composed of lithium nickel manganese cobalt composite oxide.

Abstract: Proposed are a lithium-containing transition metal oxide target formed from a sintered compact of lithium-containing transition metal oxides showing a hexagonal crystalline system in which the sintered compact has a relative density of 90% or higher and an average grain size of 1 ?m or greater and 50 ?m or less, and a lithium-containing transition metal oxide target formed from a sintered compact of lithium-containing transition metal oxides showing a hexagonal crystalline system in which the intensity ratio of the (003) face, (101) face and (104) face based on X-ray diffraction using CuK? ray satisfies the following conditions: (1) Peak intensity ratio of the (101) face in relation to the (003) face is 0.4 or higher and 1.1 or lower; and (2) Peak ratio of the (101) face in relation to the (104) face is 1.0 or higher.

Abstract: Provided is a cathode material for a lithium secondary battery composed of an aggregate of Li-A-O composite oxide particles (wherein A represents one or more metal elements selected from Mn, Fe, Co and Ni), wherein the lithium composite oxide contains 20 to 100 ppm (by mass) of P, and the total content of impurity elements excluding essential components is 2000 ppm or less. Also provided is a manufacturing method of such a cathode material for a lithium secondary battery including the steps of suspending lithium carbonate in water and thereafter introducing a metallic salt solution of one or more metal elements selected from Mn, Fe, Co and Ni in the lithium carbonate suspension, adding a small amount of phosphoric acid so that the P content in the Li-A-O composite oxide particles will be 20 to 100 ppm (by mass), and forming an aggregate of Li-A-O composite oxide particles containing 20 to 100 ppm (by mass) of P by filtering, cleansing, drying and thereafter oxidizing the obtained carbonate.

Abstract: A lithium-containing complex oxide exhibits a high performance as a cathode active material of a lithium secondary cell or the like and having a high tap density. A granular lithium-containing complex oxide, such as lithium manganese complex oxide, is made up of “complex oxide grains produced by integrating lithium-rich material grains abnormally grown during a firing reaction with the surfaces of the base grains by sintering.” The number of complex oxide grains is not more than 50 per gram of the complex grains. A metal oxide such as manganese oxide and lithium carbonate not more than 5 ?m in average grain size are mixed by means of a mixer which grinds and mixes particles by using a shearing force and heated and fired at a warming rate of not more than 50° C./h., thus producing the lithium-containing complex oxide.

Abstract: Stable supply of a cathode material for a lithium secondary battery that exels in sinterbility and composition stability and can exhibit satisfactory battery performance is accomplished by reducing to 100 ppm or less both the contents of Na and S being impurity elements in multiple oxides as materials for a cathode material for a lithium secondary battery and carbonic salts as precursor materials for the production of a cathode material for a lithium secondary battery.

Abstract: A positive plate material for lithium secondary cells stably exhibiting excellent performance including the cell initial capacity, cycle characteristics, and the safety. The material is produced by dripping an aqueous solution of a salt (e.g., cobalt sulfate) of a doping element (e.g., a transition metal, an alkaline metal, an alkaline-earth metal, B, or Al) into an alkaline solution, a carbonate solution, or a hydrogencarbonate solution in any one of which a compound (e.g., manganese oxide) of a metal (Mn, Co, Ni, or the like) which is the major component of the positive plate material so as to precipitate the compound of the doping element on the major component compound and to cover the major component compound, mixing the major component compound covered with the doping element with a lithium compound (e.g., lithium carbonate), and firing the mixture.

Abstract: Means for stably supplying a lithium-containing complex oxide exhibiting a high performance as a cathode active material of a lithium secondary cell or the like and having a high tap density. Granular lithium-containing complex oxide such as lithium manganese complex oxide comprises “complex oxide grains produced by integrating lithium-rich material grains abnormally grown during a firing reaction with the surfaces of the base grains by sintering.” The number of complex oxide grains is not more than 50 per gram of the complex grains. Metal oxide such as manganese oxide and lithium carbonate not more than 5 ?m in average grain size are mixed by means of a mixer which grinds and mixes particles by using shearing force and heating and firing them at a warming rate of not more than 50° C./h., thus producing the lithium-containing complex oxide.

Abstract: The invention is intended to establish means for stably producing manganese oxide high in tap density, suitable for use as a raw material for producing a positive plate material of a lithium secondary cell at high production yield and with high work efficiency. The means comprise the steps of employing a rotary kiln as a roasting furnace when producing manganese oxide by roasting of manganese carbonate, starting the roasting by supplying the manganese carbonate through a material charging port of the rotary kiln while filling up the roasting furnace with a low oxidizing atmosphere, (for example, in the atmosphere with oxygen concentration not more than 15%) and continuing the roasting of material for roasting while blowing an oxygen-containing gas (for example, a gas with oxygen concentration not less than 15%) onto the material for roasting, placed at a position inside the roasting furnace, away at a distance from the material charging port.