Abstract: A positive electrode active material of the present invention comprising a composite oxide containing Li and Ni, and optionally containing at least one element other than Li and Ni, is characterized in one of the following: primary particles constituting each of secondary particles of the composite oxide and having a variation coefficient of span of 17% or less, the span being a formula: (D190?D110)/D150 (D110, D150, D190: particle diameter corresponding to 10%, 50%, 90% of an integrated value in a number standard-particle diameter distribution of primary particle size); the primary particles having a variation coefficient of D150 of 19% or less; and the secondary particles having each of values of 1.00% or less, the values being formulae: |[ER1?ER21)/ER1]|×100, |[ER1?ER22)/ER1]|×100, |[ER1?ER23)/ER1]|×100 (ER1, ER21, ER22, ER23: element ratio (Li/(Ni+Other element(s))) of entire secondary particles, small particles, middle particles, large particles).

Abstract: Provided herein are processes for producing positive electrode active substance particles for non-aqueous electrolyte secondary batteries which is excellent in life characteristics of a battery with respect to a repeated charging and discharging performance thereof, as well as a non-aqueous electrolyte secondary battery. In particular, provided herein are processes for producing a positive electrode active substance for non-aqueous electrolyte secondary batteries comprising lithium transition metal layered oxide having a composition represented by the formula: Lia(NixCoyMn1-x-y)O2 wherein a is 1.0?a?1.15; x is 0<x<1; and y is 0<y<1, in which the positive electrode active substance is in the form of secondary particles formed by aggregating primary particles thereof, and a coefficient of variation of a compositional ratio: Li/Me wherein Me is a sum of Ni, Co and Mn as measured on a section of the secondary particle is not more than 25%.

Abstract: A positive electrode active material comprises a Li-transition metal-layered oxide represented by the formula: Lia(NibCocAldMee)O2 (in which Me=Mn, Mg, Ti, Ru, Zr, Nb, Mo, W; 1.00?a?1.15; 0.25<b<1; 0<c?0.30; 0?d?0.05; 0?e?0.40), and is constituted of secondary particles formed by aggregation of primary particles. As to a compositional ratio of Li which is derived from unreacted substances or decomposed products in the secondary particles, a variation coefficient (Standard deviation value/Average value) of a Li-compositional ratio: Li/M (M=Ni+Co+Al+Me) is 30% or less. The positive electrode active material hardly deteriorates even if repeatedly charged/discharged, and enables stable charge/discharge, and then a non-aqueous electrolyte secondary battery is enabled to have an excellent output property and a long lifetime.

Abstract: Provided positive electrode active substance particles for non-aqueous electrolyte secondary batteries which is excellent in life characteristics of a battery with respect to a repeated charging and discharging performance thereof, as well as a non-aqueous electrolyte secondary battery. A positive electrode active substance for non-aqueous electrolyte secondary batteries comprising lithium transition metal layered oxide having a composition represented by the formula: Lia(NixCoyMn1-x-y)O2 wherein a is 1.0•a•1.15; x is 0<x<1; and y is 0<y<1, in which the positive electrode active substance is in the form of secondary particles formed by aggregating primary particles thereof, and a coefficient of variation of a compositional ratio: Li/Me wherein Me is a sum of Ni, Co and Mn (Me=Ni+Co+Mn) as measured on a section of the secondary particle is not more than 25%.

Abstract: A positive electrode active material comprises a Li-transition metal-layered oxide represented by the formula: Lia(NibCocAldMee)O2 (in which Me=Mn, Mg, Ti, Ru, Zr, Nb, Mo, W; 1.00?a?1.15; 0.25<b<1; 0<c?0.30; 0?d?0.05; 0?e?0.40), and is constituted of secondary particles formed by aggregation of primary particles. As to a compositional ratio of Li which is derived from unreacted substances or decomposed products in the secondary particles, a variation coefficient (Standard deviation value/Average value) of a Li-compositional ratio: Li/M (M=Ni+Co+Al+Me) is 30% or less. The positive electrode active material hardly deteriorates even if repeatedly charged/discharged, and enables stable charge/discharge, and then a non-aqueous electrolyte secondary battery is enabled to have an excellent output property and a long lifetime.

Abstract: An object of the present invention is to provide a positive electrode mixture capable of conducting stable charging and discharging with a less amount of gasses generated which has an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium. The present invention relates to a positive electrode mixture comprising carbon black having a bulk density of not more than 0.1 g/cm3, a crystallite size of 10 to 40 ?, an iodine adsorption of 1 to 150 mg/g, a volatile content of not more than 0.1% and a metal impurity content of not more than 20 ppm, and a positive electrode active substance having an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium.

Abstract: In accordance with the present invention, there are provided positive electrode active substance particles for non-aqueous electrolyte secondary batteries which is excellent in life characteristics of a battery with respect to a repeated charging and discharging performance thereof, as well as a non-aqueous electrolyte secondary battery. The present invention relates to a positive electrode active substance for non-aqueous electrolyte secondary batteries comprising lithium transition metal layered oxide having a composition represented by the formula: Lia(NixCoyMn1-x-y)O2 wherein a is 1.0?a?1.15; x is 0<x<1; and y is 0<y<1, in which the positive electrode active substance is in the form of secondary particles formed by aggregating primary particles thereof, and a coefficient of variation of a compositional ratio: Li/Me wherein Me is a sum of Ni, Co and Mn (Me=Ni+Co+Mn) as measured on a section of the secondary particle is not more than 25%.

Abstract: An object of the present invention is to provide a positive electrode mixture capable of conducting stable charging and discharging with a less amount of gasses generated which has an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium. The present invention relates to a positive electrode mixture comprising carbon black having a bulk density of not more than 0.1 g/cm3, a crystallite size of 10 to 40 ?, an iodine adsorption of 1 to 150 mg/g, a volatile content of not more than 0.1% and a metal impurity content of not more than 20 ppm, and a positive electrode active substance having an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium.