Abstract: A lithium metal composite oxide powder, which comprises primary particles and secondary particles that are aggregates of the primary particles, and has an ?-NaFeO2 type crystal structure, wherein a half width (A) of a diffraction peak in a range of 2?=18.7±1° in a powder X-ray diffraction measurement for the lithium metal composite oxide powder using CuK? ray is 0.135° or more and 0.165° or less, and a c-axis lattice constant of the ?-NaFeO2 type crystal structure is 14.178 ? or more and 14.235 ? or less.

Abstract: A method for manufacturing a lithium hydroxide powder includes a pulverizing step of pulverizing coarse particles of lithium hydroxide to obtain lithium hydroxide powder; and a carbonation-suppressing step of storing the lithium hydroxide powder in an airtight container in an atmosphere satisfying requirements (1) and (2). (1) A partial pressure of carbon dioxide gas is 100 Pa or less with respect to a total amount of gas present in the airtight container. (2) A relative humidity in the airtight container is 60% or less.

Abstract: This lithium-containing transition metal composite oxide includes secondary particles that are aggregates of primary particles into or from which lithium ions are dopable or dedopable, and satisfies the following conditions: (1) the lithium-containing transition metal composite oxide is represented by Formula (I), Li[Lix(Ni(1?y?z?w)CoyMnzMw)1?x]O2 ??(I) (2) from X-ray photoelectron spectroscopy, a specific ? is calculated for each of the surface of the secondary particle and the inside of the secondary particle, and when the ? value of the surface of the secondary particle is referred to as ?1 and the ? value of the inside of the secondary particle is referred to as ?2, ?1 and ?2 satisfy the condition of Formula (II). 0.3??1/?2?1.

Abstract: This lithium-containing transition metal composite oxide includes secondary particles that are aggregates of primary particles into or from which lithium ions are dopable or dedopable, and satisfies the following conditions: (1) the lithium-containing transition metal composite oxide is represented by Formula (I), Li[Lix(Ni(1-y-z-w)CoyMnzMw)1-x]O2??(I) (2) from X-ray photoelectron spectroscopy, a specific ? is calculated for each of the surface of the secondary particle and the inside of the secondary particle, and when the ? value of the surface of the secondary particle is referred to as ?1 and the ? value of the inside of the secondary particle is referred to as ?2, ?1 and ?2 satisfy the condition of Formula (II). 0.3??1/?2?1.

Abstract: A positive electrode active material for an all-solid-state lithium-ion battery composed of particles containing crystals of a lithium metal composite oxide, wherein the lithium metal composite oxide has a layered structure and contains at least Li and a transition metal, and the positive electrode active material for an all-solid-state lithium-ion battery satisfies all Formulae (1) to (3).

Abstract: A positive electrode active material for an all-solid-state lithium-ion battery composed of particles containing crystals of a lithium metal composite oxide, wherein the particles have a layered structure and contain at least Li and a transition metal, and in powder x-ray diffraction measurement using CuK? rays, a ratio I003/I004 of an integrated intensity I104 of a diffraction peak in a range of 2?=44.4±1° to an integrated intensity I003 of a diffraction peak in a range of 2?=18.5±1° exceeds 1.23, and wherein a press density A when the positive electrode active material for an all-solid-state lithium-ion battery is compressed at a pressure of 45 MPa is 2.90 g/cm3 or more.

Abstract: What is provided is a positive electrode active material for an all-solid-state lithium-ion battery composed of particles containing crystals of a lithium metal composite oxide, wherein the particles have a hexagonal layered crystal structure belonging to the space group R-3m and contain at least Li and a transition metal, and in powder x-ray diffraction measurement using CuK? rays, the crystallite size L003 of a diffraction peak in a range of 2?=18.7±1° is 1,300 ? or less, and wherein the BET specific surface area is 0.2 m2/g or more and 2.0 m2/g or less.

Abstract: What is claimed is a positive electrode active material for an all-solid-state lithium-ion battery composed of particles containing crystals of a lithium metal composite oxide, wherein the lithium metal composite oxide has a layered structure and contains at least Li and a transition metal, and wherein, in the particles, in pore physical properties obtained from nitrogen adsorption isotherm measurement and nitrogen desorption isotherm measurement at a liquid nitrogen temperature, the total pore volume obtained from a nitrogen adsorption amount when the relative pressure (p/p0) of an adsorption isotherm is 0.99 is less than 0.0035 cm3/g.

Abstract: A mixed powder for an all-solid-state lithium-ion battery, which is composed of a positive electrode active material for a lithium-ion battery and a solid electrolyte, wherein the positive electrode active material for a lithium-ion battery is composed of particles containing crystals of a lithium metal composite oxide, and the lithium metal composite oxide has a layered structure and contains at least Li and a transition metal, wherein the positive electrode active material for a lithium-ion battery has a particle diameter distribution that satisfies the following Formula (1), and wherein the solid electrolyte has a particle diameter distribution that satisfies the following Formula (2): D90-D10 / D50 ? 1 .5 D90-D10 / D50 ? 2.

Abstract: The present invention relates to a lithium metal composite oxide with a layered structure wherein: at least Li, Ni, and an element X are included; the element X is at least one element selected from the group consisting of Co, Mn, Mg, Ca, Sr, Ba, Zn, B, Al, Ga, Ti, Zr, Ge, Fe, Cu, Cr, V, W, Mo, Sc, Y, Nb, La, Ta, Tc, Ru, Rh, Pd, Ag, Cd, In, and Sn; and an average three-dimensional particle unevenness of primary particles with an equivalent spherical diameter of at least 1.0 ?m is at least 1.91 and less than 2.9.

Abstract: A positive electrode active material for lithium secondary batteries which is able to doped/undoped with lithium ions and contains at least Ni, in which a ratio P/Q (atom %/mass %) of a concentration P (atom %) of sulfur atoms being present in a surface of the positive electrode active material to a concentration Q (mass %) of sulfuric acid radicals being present in the whole positive electrode active material is more than 0.8 and less than 5.0, and the Q (mass %) is 0.01 or more and 2.0 or less.

Abstract: A lithium metal composite oxide powder having a layered structure and containing at least Li, Ni, and an element X, in which, in a cumulative frequency distribution curve of R ranging 0% to 100% as a whole, R(90) that is a value of R at a point where a cumulative frequency from a small side of the R reaches 90% is 1.7 or more and 3.7 or less. R is a value of O/(Ni+X) that is a ratio of an amount of a substance of oxygen, which is indicated by O, to a total amount of substances of nickel and the element X, which is indicated by Ni+X, in one particle of a lithium metal composite oxide that is contained in the lithium metal composite oxide powder. The amounts of the substances of nickel, the element X, and oxygen are obtained by energy-dispersive X-ray (EDX) spectroscopy in which an accelerating voltage is set to 1100 V regarding the one particle of the lithium metal composite oxide.

Abstract: The present invention provides a positive electrode active material for an all-solid-state lithium-ion battery, an electrode, and an all-solid-state lithium-ion battery capable of smoothly exchanging lithium ions with a solid electrolyte at a positive electrode and improving battery performance. A positive electrode active material for an all-solid-state lithium-ion battery formed of particles includes crystals of a lithium metal composite oxide, in which the lithium metal composite oxide has a layered structure and contains at least Li and a transition metal, and the particles have an average crush strength of more than 50 MPa and satisfy Expression (1). 1.

Abstract: A positive electrode active material for a lithium secondary battery includes secondary particles which are aggregates of primary particles that are capable of being doped and dedoped with lithium ions, in which the secondary particles have a total specific surface area of pores having a pore radius of 10 nm or more and 50 nm or less of 0.27 m2/g or more and 0.90 m2/g or less in a pore distribution measured by a mercury porosimetry method.

Abstract: The present invention provides a positive electrode active material for lithium secondary batteries including: secondary particles obtained by aggregating primary particles capable of being doped and de-doped with lithium ions, in which the secondary particles have pores, and pore distribution obtained by a mercury intrusion method satisfies requirements (1) and (2) below: (1) pores that are present in any one or both of the secondary particles or spaces between the secondary particles have a pore peak within a range of a pore radius of equal to or greater than 10 nm and equal to or less than 200 nm; and (2) a total surface area of pores that have pore radii of equal to or greater than 100 nm and equal to or less than 10 ?m among the pores that are present in any one or both of the secondary particles or spaces between the secondary particles is less than 1.1 m2/g.

Abstract: The present invention provides a positive electrode active material for an all-solid-state lithium-ion battery, an electrode, and an all-solid-state lithium-ion battery capable of smoothly exchanging lithium ions with a solid electrolyte at a positive electrode and improving battery performance. A positive electrode active material for an all-solid-state lithium-ion battery formed of particles includes crystals of a lithium metal composite oxide, in which the lithium metal composite oxide has a layered structure and contains at least Li and a transition metal, and the particles have an average crush strength of more than 50 MPa and satisfy Expression (1). 1.

Abstract: A lithium composite metal compound is a lithium composite metal compound represented by Composition Formula (I), in which in a powder X-ray diffraction measurement using CuK? radiation, when a crystallite diameter representing a diffraction peak in a range of 2?=18.7±1 ? is defined as La and a crystallite diameter representing a diffraction peak in a range of 2?=64.5±1 ? is defined as Lb, a ratio (La/Lb) of La to Lb is La/Lb?1.3.

Abstract: A positive electrode active material for a lithium secondary battery, including secondary particles formed by aggregation of primary particles capable of being doped and undoped with lithium ions, said positive electrode active material having: an ?-NaFeO2 type crystal structure represented by formula: Li[Lix(NiaCobMncMd)1-x]O2 (I), wherein 0?x?0.1, 0.7<a<1, 0<b<0.2, 0?c<0.2, 0<d<0.1, a+b+c+d=1, and M is at least one metal element selected from the group consisting of Fe, Cr, Ti, Mg, Al, Zr, Ca, Sc, V, Cr, Cu, Zn, Ga, Ge, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In and Sn; and a crystallite size ?/crystallite size ? ratio (?/?) of 1.60 to 2.40, wherein the crystallite size ? is within a peak region of 2?=18.7±1° and the crystallite size ? is within a peak region of 2?=44.4±1°, each determined by a powder X-ray diffraction measurement using Cu-K? radiation.

Abstract: A lithium metal composite oxide powder, which comprises primary particles and secondary particles that are aggregates of the primary particles, and has an ?-NaFeO2 type crystal structure, wherein a half width (A) of a diffraction peak in a range of 2?=18.7±1° in a powder X-ray diffraction measurement for the lithium metal composite oxide powder using CuK? ray is 0.135° or more and 0.165° or less, and a c-axis lattice constant of the ?-NaFeO2 type crystal structure is 14.178 ? or more and 14.235 ? or less.

Abstract: A positive-electrode active material for a lithium secondary battery includes: a secondary particle in which a plurality of primary particles of a lithium composite metal oxide are aggregated, in which the secondary particle has a void formed therein, and a through-hole that connects the void to a surface of the secondary particle, and satisfies predetermined requirements (i) to (iii).