Abstract: A method for manufacturing a positive electrode active material includes: (a) preparing a fired powder of a lithium nickel composite oxide by mixing a nickel compound selected from a nickel hydroxide including nickel, and an element selected from other transition metal elements, elements of the second group and elements of the thirteenth group of the Periodic System, a nickel oxyhydroxide thereof, and a nickel oxide obtained by roasting thereof, and a lithium compound, and firing the mixture at a maximum temperature of 650° C. to 850° C. under oxygen atmosphere; and (b) preparing a lithium nickel composite oxide powder by mixing the fired powder with water to obtain a slurry, washing the fired powder with water at a temperature of 10° C. to 40° C., while controlling an electrical conductivity of a liquid portion of the slurry to 30 mS/cm to 60 mS/cm, then filtering and drying the resultant fired powder.

Abstract: A method for manufacturing a positive electrode active material includes: (a) preparing a fired powder of a lithium nickel composite oxide by mixing a nickel compound selected from a nickel hydroxide including nickel, and an element selected from other transition metal elements, elements of the second group and elements of the thirteenth group of the Periodic System, a nickel oxyhydroxide thereof, and a nickel oxide obtained by roasting thereof, and a lithium compound, and firing the mixture at a maximum temperature of 650° C. to 850° C. under oxygen atmosphere; and (b) preparing a lithium nickel composite oxide powder by mixing the fired powder with water to obtain a slurry, washing the fired powder with water at a temperature of 10° C. to 40° C., while controlling an electrical conductivity of a liquid portion of the slurry to 30 mS/cm to 60 mS/cm, then filtering and drying the resultant fired powder.

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery that is constituted by a lithium nickel composite oxide that combines a high capacity with excellent thermal stability, a manufacturing method suitable for industrial production, and a nonaqueous electrolyte secondary battery of high safety. A positive electrode active material for a nonaqueous electrolyte secondary battery includes a lithium nickel composite oxide represented by the following composition formula (1): LibNi1-aM1aO2??(1) (where M1 represents at least one element selected from transition metal elements other than Ni, elements of the second group of the Periodic System and elements of the thirteenth group of the Periodic System; a satisfies the condition 0.01?a?0.5; and b satisfies the condition 0.85?b?1.05). The content of carbon in the lithium nickel composite oxide is equal to or less than 0.08% by mass.

Abstract: An objective of the present invention is to provide a non-aqueous electrolyte secondary battery positive electrode active material formed from a lithium-nickel composite oxide which, while retaining high capacity and a high level of safety, has an excellent cycle characteristic by controlling reaction resistance and a method for producing it. [Solution] A lithium-nickel composite oxide is produced by steps (a) to (c) described below: (a) nickel hydroxide and/or nickel oxyhydroxide in a prescribed composition are sintered in a non-reducing atmosphere having 850° C. or lower to give nickel oxide; (b) after the nickel oxide and a lithium compound are mixed in a prescribed molar ratio, the mixture is sintered in an oxygen atmosphere at a temperature of 650 to 850° C.

Abstract: A lithium nickel composite oxide, having small inner resistance, large battery capacity and high thermal stability, can be used as a positive electrode active material for a non-aqueous electrolyte secondary battery. The positive electrode active material is composed of the lithium nickel composite oxide of LibNi1-aMaO2 (wherein M represents at least one element selected from a transition metal element other than Ni, the second group element and the thirteenth group element; a satisfies 0.01?a?0.5; and b satisfies 0.9?b?1.1). This is obtained by filtering and drying the fired powder after water washing, wherein it is dried at 90° C. or lower, till moisture is reduced to 1% or less by mass in drying, and then at 120° C., and under gas atmosphere where content of compound components containing carbon is 0.01% or less by volume, or under vacuum atmosphere.

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery that is constituted by a lithium nickel composite oxide that combines a high capacity with excellent thermal stability, a manufacturing method suitable for industrial production, and a nonaqueous electrolyte secondary battery of high safety. A positive electrode active material for a nonaqueous electrolyte secondary battery includes a lithium nickel composite oxide represented by the following composition formula (1): LibNi1-aM1aO2??(1) (where M1 represents at least one element selected from transition metal elements other than Ni, elements of the second group of the Periodic System and elements of the thirteenth group of the Periodic System; a satisfies the condition 0.01?a?0.5; and b satisfies the condition 0.85?b?1.05). The content of carbon in the lithium nickel composite oxide is equal to or less than 0.08% by mass.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a composite oxide containing lithium and metal M other than lithium, and M contains Ni, Mn, and Co. The molar ratio of Ni to the total of Ni, Mn, and Co is from 0.45 to 0.65, and the molar ratio of Mn to the total of Ni, Mn, and Co is from 0.15 to 0.35. The positive electrode active material has a pressed density under a compression of 60 MPa of 3.3 g/cm3 or more and 4.3 g/cm3 or less. The positive electrode active material has a volume resistivity under a compression of 60 MPa of 100 ?·cm or more and less than 1000 ?·cm.

Abstract: A positive electrode active material for non-aqueous electrolyte secondary battery composed of a lithium nickel composite oxide having high capacity and superior heat stability, a production method that is suitable for its industrial production, and a non-aqueous electrolyte secondary battery having high safety. The positive electrode active material for non-aqueous electrolyte secondary battery includes a lithium nickel composite oxide having by the following general formula (1): LibNi1-aM1aO2??(1) (wherein M1 represents at least one kind of element selected from transition metal elements other than Ni, the second group elements and the thirteenth group elements; a satisfies 0.01?a?0.5; and b satisfies 0.85?b?1.05). The amount of lithium at the surface of the lithium nickel composite oxide is 0.10% by mass or lower. The positive electrode active material is obtained by water washing fired powder at a temperature range of 10 to 40° C., and then filtering and drying the same.

Abstract: A lithium nickel composite oxide, having small inner resistance, large battery capacity and high thermal stability, can be used as a positive electrode active material for a non-aqueous electrolyte secondary battery. The positive electrode active material is composed of the lithium nickel composite oxide of LibNi1-aMaO2 (wherein M represents at least one element selected from a transition metal element other than Ni, the second group element and the thirteenth group element; a satisfies 0.01?a?0.5; and b satisfies 0.9?b?1.1). This is obtained by filtering and drying the fired powder after water washing, wherein it is dried at 90° C. or lower, till moisture is reduced to 1% or less by mass in drying, and then at 120° C., and under gas atmosphere where content of compound components containing carbon is 0.01% or less by volume, or under vacuum atmosphere.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery including a lithium-containing transition metal oxide having a closest-packed cubic structure of oxygen, the lithium-containing transition metal oxide having a composition represented by the formula (1): Li[Lip(NixMnyCoz)1-p]O2, where x, y, and z represent element contents of nickel, manganese, and cobalt, respectively, and satisfies 0.2+y?x?0.7, 0.15?y, 0.05?z, x+y+z=1, and 0?p?0.1.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a composite oxide containing lithium and metal M other than lithium, and M contains Ni, Mn, and Co. The molar ratio of Ni to the total of Ni, Mn, and Co is from 0.45 to 0.65, and the molar ratio of Mn to the total of Ni, Mn, and Co is from 0.15 to 0.35. The positive electrode active material has a pressed density under a compression of 60 MPa of 3.3 g/cm3 or more and 4.3 g/cm3 or less. The positive electrode active material has a volume resistivity under a compression of 60 MPa of 100 ?·cm or more and less than 1000 ?·cm.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery including a lithium-containing transition metal oxide having a closest-packed cubic structure of oxygen, the lithium-containing transition metal oxide having a composition represented by the formula (1): Li[Lip(NixMnyCoz)1-p]O2, where x, y, and z represent element contents of nickel, manganese, and cobalt, respectively, and satisfies 0.2+y?x?0.7, 0.15?y, 0.05?z, x+y+z=1, and 0?p?0.1.

Abstract: A non-aqueous electrolyte secondary battery comprising: an electrode plate assembly; a non-aqueous electrolyte; and an outer jacket accommodating the electrode plate assembly and the non-aqueous electrolyte therein, the electrode plate assembly comprising a positive electrode plate, a negative electrode plate and a separator interposed between the positive electrode plate and the negative electrode plate, the separator comprising a polyolefin resin, wherein (1) the separator comprises at least one layer comprising a polypropylene resin, (2) the layer comprising a polypropylene resin contains an antioxidant with a melting point of 60° C. or higher, and (3) the layer comprising a polypropylene resin and the positive electrode are in contact with one another.

Abstract: A lithium ion secondary battery comprising: a positive electrode; a negative electrode; and a non-aqueous electrolyte, the positive electrode comprising a positive electrode active material and a binder, the positive electrode active material comprising a lithium-containing composite oxide represented by the chemical formula: Lia(Co1-x-yMgxMy)bOc where M is at least one selected from Ni, Mn and Al, 0?a?1.05, 0.005?x?0.025, 0?y?0.25, 0.85?b?1.1, and 1.8?c?2.1.

Abstract: A lithium ion secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode active material, a conductive agent and a binder, the positive electrode active material comprises a lithium-containing composite oxide represented by the formula Lia(Co1?x?yMgxMy)bOc, where M is at least one selected from Ni and Al, 0?a?1.05, 0.03?x?0.15, 0?y?0.25, 0.85?b?1.1 and 1.8?c?2.1, and the amount of the conductive agent contained in the positive electrode is not more than 3.0 parts by weight per 100 parts by weight of the positive electrode active material.

Abstract: A non-aqueous electrolyte secondary battery comprising: an electrode plate assembly; a non-aqueous electrolyte; and an outer jacket accommodating the electrode plate assembly and the non-aqueous electrolyte therein, the electrode plate assembly comprising a positive electrode plate, a negative electrode plate and a separator interposed between the positive electrode plate and the negative electrode plate, the separator comprising a polyolefin resin, wherein (1) the separator comprises at least one layer comprising a polypropylene resin, (2) the layer comprising a polypropylene resin contains an antioxidant with a melting point of 60° C. or higher, and (3) the layer comprising a polypropylene resin and the positive electrode are in contact with one another.

Abstract: A lithium ion secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode active material, a conductive agent and a binder, the positive electrode active material comprises a lithium-containing composite oxide represented by the formula Lia(Co1-x-yMgxMy)bOc, where M is at least one selected from Ni and Al, 0≦a≦1.05, 0.03≦x≦0.15, 0≦y≦0.25, 0.85≦b≦1.1 and 1.8≦c≦2.1, and the amount of the conductive agent contained in the positive electrode is not more than 3.0 parts by weight per 100 parts by weight of the positive electrode active material.

Abstract: A lithium ion secondary battery comprising: a positive electrode; a negative electrode; and a non-aqueous electrolyte, the positive electrode comprising a positive electrode active material and a binder, the positive electrode active material comprising a lithium-containing composite oxide represented by the chemical formula: