Jx Nippon Mining Metals Corporation

Nippon Mining & Metals Co., Ltd.

Tokyo University of Science Foundation

Nikko Materials Company, Limited

Yoshio Kajiya

Kentaro Okamoto

Ryuichi Nagase

Hiroshi Tasaki

Yasuhiro Kawahashi

Shinichi Komaba

Naoaki Yabuuchi

Hirohito Satoh

Hirohito Sato

Shunsuke Kobayashi

Nagase Ryuichi

Provided is a novel lithium complex oxide containing molybdenum. A complex oxide represented by the following compositional formula: LiMMoO wherein M is one or two or more selected from the group consisting of Mn, Ru, Sn, Mg, Al, Ti, V, Cr, Fe, Co, Ni, Cu, and Zn; x is in the range of 0.60 to 0.75; y is in the range of 0.15 to 0.25; and z is in the range of 0.075 to 0.20.

Lithium complex oxide

The present invention provides a positive electrode active material for lithium ion batteries having excellent battery property. The positive electrode active material for lithium ion batteries is represented by composition formula: LiNiMO, wherein

Positive electrode active material for lithium-ion battery, a positive electrode for lithium-ion battery, and lithium-ion battery

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.

Method for producing positive electrode active material for lithium ion battery and positive electrode active material for lithium ion battery

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: Li(NiMe)O(wherein Me 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 0.70 to 0.79, 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 three lines given by the equations: y=1.108, y=&#x2212;37.298x+108.27, and y=75.833x&#x2212;217.1 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.

Positive electrode active substance for lithium ion batteries, positive electrode for lithium ion batteries, and lithium ion battery

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(LiNiM)O(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&#x2266;x&#x2266;0.1, 0&#x3c;y&#x2266;0.7, and &#x3b1;&#x3e;0).

Positive electrode active material for lithium ion battery, positive electrode for lithium ion battery, and lithium ion battery

The present invention provides a method for producing a high quality positive electrode active material for lithium ion batteries at low cost and at excellent production efficiency. The method for producing a positive electrode active material for lithium ion batteries includes a step of firing a powder of lithium-containing carbonate that is a precursor for positive electrode active material for lithium ion batteries in a rotary kiln. In the step, a temperature at a powder feed part inside of the rotary kiln is kept at 500&#xb0; C. or more.

Method for producing positive electrode active material for lithium ion batteries and positive electrode active material for lithium ion batteries

The present invention provides a positive electrode active material for a lithium ion battery which has high capacity and good rate characteristics. The positive electrode active material has a layer structure represented by the compositional formula: Li(NiMe)O, wherein Me 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 0.5 to 0.65, and z denotes a number of 1.9 or more. The positive electrode active material is selected by measuring the coordinates of the lattice constant a and compositional ratio (Li/M) and selecting materials within the region enclosed by three lines given by the equations: y=&#x2212;20.186x+59.079, y=35x&#x2212;99.393, and y=&#x2212;32.946x+95.78, wherein the x-axis represents a lattice constant a and the y-axis represents a compositional ratio (Li/M) of Li to M.

Positive electrode active materials for lithium ion batteries having good characteristics are disclosed. In one embodiment, a positive electrode active material has a layer structure represented by the compositional formula: Li(NiMe)O(wherein Me 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 0.89, 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.

This invention provides a lithium nickel manganese cobalt composite oxide having a composition of LiaNixMnyCozO(x+y+z=1, 1.05&#x3c;a&#x3c;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 cmand the peak intensity of an F2g oscillation mode of a spinel structure located at 500 to 530 cmin 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 cmare 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. In particular, it is possible to obtain lithium nickel manganese cobalt composite oxide and a lithium rechargeable battery superior in rate characteristics and cycle characteristics.

Lithium nickel manganese cobalt composite oxide and lithium rechargeable battery

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:LiNiMO(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&#x2266;x&#x2266;1.2, 0&#x3c;y&#x2266;0.7, and &#x3b1;&#x3e;0.1).

Positive electrode active material for lithium ion battery, positive electrode for lithium ion battery and lithium ion battery

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 LiaNixMnyCozO(1.0&#x3c;a&#x3c;1.3, 0.8&#x3c;x+y+z&#x3c;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 n (molar %) in metal components as a horizontal axis, the relationship thereof is within a range of Vm=21.276-0.0117 n as an upper limit and Vm=21.164-0.0122 n as a lower limit, and a half value width of both the (018) plane and the (113) plane is 0.200&#xb0; 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. By using this material, it is possible to obtain a positive electrode active material for a lithium ion battery that is able to further ensure the characteristics and safety of the lithium ion battery.

Positive electrode active material for lithium ion battery, positive electrode for secondary battery, and lithium ion battery

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 Li(NiM)O(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 cmand between 1470 and 1500 cmby the maximum intensity of a peak appearing between 520 and 620 cmin an infrared absorption spectrum obtained by FT-IR is represented by A, A satisfies the following relational formula: 0.20y&#x2212;0.05&#x2266;A&#x2266;0.53y&#x2212;0.06.

Positive electrode active material for lithium ion battery

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: LiMnMO(wherein M is one or more elements selected from Al, Mg, Si, Ca, Ti, Cu, Ba, W and Pb, and, &#x2212;0.1&#x2266;x&#x2266;0.2, and 0.06&#x2266;y&#x2266;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 &#x3bc;m and not more than 5 &#x3bc;M, d50 is not less than 6 &#x3bc;m and not more than 9 &#x3bc;m, and d90 is not less than 12 &#x3bc;m and not more than 15 &#x3bc;M, and BET specific surface area thereof is greater than 1.0 m/g and not more than 2.0 m/g, and the tap density thereof is not less than 0.5 g/cmand less than 1.0 g/cm.

Lithium-manganese composite oxides for lithium ion battery and process for preparing same

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 &#x3bc;m or greater and 50 &#x3bc;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&#x3b1; 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. In addition to this lithium-containing transition metal oxide target optimal for forming a thin film positive electrode for use in a thin film battery such as a three-dimensional battery and a solid state battery, also proposed are its production method and a lithium ion thin film secondary battery. In particular, the present invention aims to propose a positive electrode target capable of obtaining a thin film with superior homogeneity.

Lithium-containing transition metal oxide target, process for producing the same and lithium ion thin film secondary battery

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. This cathode material for a lithium secondary battery and its manufacturing method realize improved sinterability and battery characteristics.

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Kitaibaraki, Japan

Yoshio Kajiya