Abstract: A positive electrode active substance, wherein: the average primary particle diameter of an Ni-containing lithium complex oxide A is 0.5 ?m or greater, and is greater than the average primary particle diameter (0.05 ?m or greater) of an Ni-containing lithium complex oxide B; and the average secondary particle diameter of the Ni-containing lithium complex oxide A is 2-6 ?m, and is less than the average secondary particle diameter (10-20 ?m) of the Ni-containing lithium complex oxide B. The Ni-containing lithium complex oxides A, B contain 55 mol % or more of Ni relative to the total mol of metal elements excluding Li, have a crystallite diameter of 100-200 nm, and are such that the disorder of elemental Ni is 3% or less.

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries includes a Ni-containing lithium transition metal oxide in the form of secondary particles formed by the aggregation of primary particles of the oxide, the proportion of Ni in the lithium transition metal oxide being not less than 80 mol % relative to the total number of moles of metal element(s) except Li, the average particle size of the primary particles being not less than 0.5 ?m, the average particle size of the secondary particles being not less than 8 ?m, the lithium transition metal oxide having a Ni disorder of not more than 3% and a crystallite size in the range of 100 to 200 nm according to X-ray diffractometry.

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery, the positive electrode active material comprising a Ni-containing lithium composite oxide a, b, wherein the Ni-containing lithium composite oxide a has an average primary particle size of 1 ?m or more which is larger than the average primary particle size of the Ni-containing lithium composite oxide b, the Ni-containing lithium composite oxide a has an average secondary particle size of 2 to 6 ?m, the Ni-containing lithium composite oxide b has an average primary particle size of 0.05 ?m or more and an average secondary particle size of 10 to 20 ?m, the Ni-containing lithium composite oxide a contains Mn and at least one of B and Al, the Ni-containing lithium composite oxide b contains Mn, and the ratio of the Ni-containing lithium composite oxide a to the Ni-containing lithium composite oxide b is 5:95 to 55:45.

Abstract: A method for manufacturing a positive electrode disclosed here includes: a CNT paste preparing step of preparing a CNT paste containing at least carbon nanotubes (CNT) and a dispersing agent; a magnetic separating step of exerting a magnetic force on the CNT paste to adsorb metal existing inside the CNTs and separating the CNTs and the metal; a positive electrode active material layer forming paste preparing step of mixing the CNTs subjected to the magnetic separating step, a positive electrode active material, and a binder to prepare a positive electrode active material layer forming paste; and a positive electrode active material layer forming step of applying the prepared positive electrode active material layer forming paste to a positive electrode current collector to form a positive electrode active material layer on the positive electrode current collector.

Abstract: This positive electrode active material comprises an Ni-containing lithium composite oxide A and an Ni-containing lithium composite oxide B. Each of the Ni-containing lithium composite oxide A and the Ni-containing lithium composite oxide B contains 50% by mole or more of Ni relative to the total number of moles of the metal elements excluding Li; the Ni-containing lithium composite oxide A has an average primary particle diameter of 2 ?m or more, an average secondary particle diameter of from 2 ?m to 6 ?m, and a particle breaking load of 5 mN or more; and the Ni-containing lithium composite oxide B has an average primary particle diameter of 1 ?m or less, an average secondary particle diameter of from 10 ?m to 20 ?m, and a particle breaking load of 20 mN or more, while having a coating layer on the surface of each primary particle.

Abstract: Provided is a positive electrode active material capable of increasing capacity of a nonaqueous electrolyte secondary battery and providing the nonaqueous electrolyte secondary battery with high capacity degradation resistance in repetitive charging and discharging. The positive electrode active material disclosed here includes first lithium composite oxide particles having a layered structure and second lithium composite oxide particles having a layered structure. The first lithium composite oxide particles have an average particle size (D50) of 3.0 ?m to 6.0 ?m. The first lithium composite oxide particles have a dibutyl phthalate absorption value of 15 mL/100 g to 27 mL/100 g. The second lithium composite oxide particles have an average particle size (D50) of 10.0 ?m to 22.0 ?m. The second lithium composite oxide particles have a dibutyl phthalate absorption value of 14 mL/100 g to 22 mL/100 g.

Abstract: Provided is a positive electrode active material capable of increasing capacity and output of a nonaqueous electrolyte secondary battery. A positive electrode active material disclosed here includes particles of a lithium composite oxide having a layered structure. The positive electrode active material has a tap density of 2.8 g/cm3 to 3.0 g/cm3, and the positive electrode active material has a dibutyl phthalate absorption value of 14.5 mL/100 g to 18.5 mL/100 g.

Abstract: Provided is a positive electrode capable of increasing capacity and output of a nonaqueous electrolyte secondary battery. A positive electrode disclosed here includes a positive electrode current collector and a positive electrode active material layer supported by the positive electrode current collector. The positive electrode active material layer includes particles of a lithium composite oxide having a layered structure as a positive electrode active material. The positive electrode active material layer has a porosity of 17% to 20%. A peak pore size in pore distribution of the positive electrode active material layer measured by mercury intrusion porosimetry is 0.400 ?m to 0.550 ?m.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to an embodiment of the present disclosure is represented by a general formula of LixNiyM1-yO2 (where M includes at least one metal element selected from Co and Mn, 0.1?x?1.2, 0.3<y<1), has a volumetric average particle size (D50) of 7 ?m or more and 30 ?m or less, and has an average surface roughness of 4%, or less.

Abstract: The positive electrode active material with lithium composite oxide A containing W and Ni and W-free lithium composite oxide B containing Ni. Regarding the lithium composite oxide A, the proportion of Ni relative to the total moles of metal elements except for lithium is 30 to 60 mol %, 50% particle size D50 is 2 to 6 ?m, 10% particle size D10 is 1.0 ?m or more, and 90% particle size D90 is 6.8 ?m or less. Regarding the lithium composite oxide B, the proportion of Ni relative to the total moles of metal elements except for lithium is 50 to 95 mol %, 50% particle size D50 is 10 to 22 ?m, 10% particle size D10 is 7.0 ?m or more, and 90% particle size D90 is 22.5 ?m or less. The mass ratio of the lithium composite oxide B to the lithium composite oxide A is 1:1 to 5.7:1.

Abstract: Each of the Ni-containing lithium-based complex oxide A and the Ni-containing lithium-based complex oxide B contains Ni in an amount of 55 mol % or more relative to the total number of moles of metal elements excluding Li, the Ni-containing lithium-based complex oxide A has an average primary particle diameter of 2 ?m or more, an average secondary particle diameter of 2 to 6 ?m, a particle fracture load of 5 to 35 mN and a BET specific surface area of 0.5 m2/g to 1.0 m2/g, and the Ni-containing lithium-based complex oxide B has an average primary particle diameter of 1 ?m or less, an average secondary particle diameter of 10 to 20 ?m, a particle fracture load of 10 to 35 mN and a BET specific surface area of 0.1 m2/g to 1.0 m2/g.

Abstract: A positive electrode is used for a nonaqueous electrolyte secondary battery. The positive electrode includes a positive electrode substrate and a positive electrode active material layer. The positive electrode active material layer is disposed on a surface of the positive electrode substrate. The positive electrode active material layer includes a first layer and a second layer. The second layer is disposed between the positive electrode substrate and the first layer. The first layer includes a first positive electrode active material. The first positive electrode active material includes first aggregated particles. The second layer includes a second positive electrode active material. The second positive electrode active material includes second aggregated particles and single-particles. Each of the first aggregated particles and the second aggregated particles is formed by aggregation of 50 or more primary particles. The single-particles have an arithmetic mean diameter larger than the primary particles.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. In number-based particle size distribution, the positive electrode active material has a first peak and a second peak. The first peak has a first vertex. The second peak has a second vertex. The first vertex is located on a smaller particle size side from the second vertex. The first peak is attributed to first particles. The second peak is attributed to second particles. The first particles include aggregated primary particles and films. Each film is adhered to a surface of each primary particle. The film includes a metallic element. Relationships of expression (I) “R=C/D” and expression (II) “1.54?R?1.75” are satisfied. In the expression (I), C [ppm] represents a mass fraction of the metallic element relative to the first particles, and D [?] represents a crystallite size of the first particles.

Abstract: This positive electrode active substance for a nonaqueous electrolyte secondary battery contains secondary particles that are aggregates of primary particles of a lithium transition metal oxide. The average particle diameter of the primary particles is within the range of 0.5 to 2 ?m, the compressive breaking strength of the primary particles is 1,000 MPa or greater, and the crystallite diameter of the primary particles is within the range of 100 to 280 nm.

Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries includes a Ni-containing lithium composite oxide A and Ni-containing lithium composite oxide B. The Ni-containing lithium composite oxide A contains at least 55 mol % of Ni relative to the total number of mols of metal elements other than Li. The Ni-containing lithium composite oxide B contains Ti and Ni. The Ni content in the Ni-containing lithium composite oxide B is at least 55 mol % relative to the total number of mols of metal elements other than Ti and Li. The Ni-containing lithium composite oxide A and the Ni-containing lithium composite oxide B have a prescribed average first particle diameter and a prescribed average second particle diameter, respectively, and the ratio between the Ni-containing lithium composite oxide A and the Ni-containing lithium composite oxide B is, in mass ratio, 5:95-55:45.

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries includes secondary particles of lithium transition metal oxide including aggregates of primary particles of the oxide. The primary particles have an average particle size of not less than 1 ?m, and the secondary particles have a void content of more than 30%.

Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery, the positive electrode active material comprising a Ni-containing lithium composite oxide a, b, wherein the Ni-containing lithium composite oxide a has an average primary particle size of 1 ?m or more which is larger than the average primary particle size of the Ni-containing lithium composite oxide b, the Ni-containing lithium composite oxide a has an average secondary particle size of 2 to 6 ?m, the Ni-containing lithium composite oxide b has an average primary particle size of 0.05 ?m or more and an average secondary particle size of 10 to 20 ?m, the Ni-containing lithium composite oxide a contains Mn and at least one of B and Al, the Ni-containing lithium composite oxide b contains Mn, and the ratio of the Ni-containing lithium composite oxide a to the Ni-containing lithium composite oxide b is 5:95 to 55:45.

Abstract: A positive electrode active substance, wherein: the average primary particle diameter of an Ni-containing lithium complex oxide A is 0.5 ?m or greater, and is greater than the average primary particle diameter (0.05 ?m or greater) of an Ni-containing lithium complex oxide B; and the average secondary particle diameter of the Ni-containing lithium complex oxide A is 2-6 ?m, and is less than the average secondary particle diameter (10-20 ?m) of the Ni-containing lithium complex oxide B. The Ni-containing lithium complex oxides A, B contain 55 mol % or more of Ni relative to the total mol of metal elements excluding Li, have a crystallite diameter of 100-200 nm, and are such that the disorder of elemental Ni is 3% or less.

Abstract: A positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode current collector and a positive electrode mixture layer which contains a positive electrode active material and is disposed on the positive electrode current collector. The void ratio of the positive electrode mixture layer is 30% or less, and the void ratio of secondary particles of the positive electrode active material is within a range of 30% or more and 70% or less of the void ratio of the positive electrode mixture layer.

Abstract: The positive electrode active material with lithium composite oxide A containing W and Ni and W-free lithium composite oxide B containing Ni. Regarding the lithium composite oxide A, the proportion of Ni relative to the total moles of metal elements except for lithium is 30 to 60 mol %, 50% particle size D50 is 2 to 6 ?m, 10% particle size D10 is 1.0 ?m or more, and 90% particle size D90 is 6.8 ?m or less. Regarding the lithium composite oxide B, the proportion of Ni relative to the total moles of metal elements except for lithium is 50 to 95 mol %, 50% particle size D50 is 10 to 22 ?m, 10% particle size D10 is 7.0 ?m or more, and 90% particle size D90 is 22.5 ?m or less. The mass ratio of the lithium composite oxide B to the lithium composite oxide A is 1:1 to 5.7:1.