Abstract: A positive electrode active material for an all-solid-state lithium secondary battery, which is capable of improving the rate characteristics, the cycle characteristics, and the initial charge and discharge efficiency even in the case where a sulfide-based solid electrolyte is used, wherein the surface of a lithium-containing composite oxide, referred to as present core particles, is coated with a compound, referred to as, LiAO compound, containing Li, A, where A represents one or more elements selected from the group consisting of Ti, Zr, Ta, Nb, Zn, W, and Al, and O; and a halogen is present on the surface of the present core particles.

Abstract: An active material is provided for use in a solid-state battery. The active material exhibits at least one peak in the range of 0.145 to 0.185 nm and at least one peak in the range of 0.280 to 0.310 nm in a radial distribution function obtained through measurement of an X-ray absorption fine structure thereof. In the particle size distribution, by volume, of the active material obtained through a particle size distribution measurement by laser diffraction scattering method, the ratio of the absolute value of the difference between the mode diameter of the active material and the D10 of the active material (referred to as the “mode diameter” and the “D10” respectively) to the mode diameter in percentage terms, (|mode diameter - D10 / mode diameter) x 100, satisfies 0% < (( | mode diameter - D10| / mode diameter) x 100) ? 58.0%.

Abstract: An active material is provided for use in a solid-state battery. The active material exhibits at least one peak in the range of 0.145 to 0.185 nm and at least one peak in the range of 0.280 to 0.310 nm in a radial distribution function obtained through measurement of an X-ray absorption fine structure thereof. In the particle size distribution, by volume, of the active material obtained through a particle size distribution measurement by laser diffraction scattering method, the ratio of the absolute value of the difference between the mode diameter of the active material and the D10 of the active material (referred to as the “mode diameter” and the “D10” respectively) to the mode diameter in percentage terms, (|mode diameter?D10|/mode diameter)×100, satisfies 0%<((|mode diameter?D10|/mode diameter)×100)?58.0%.

Abstract: The present invention provides a positive electrode active material with which an increase in the interface resistance between the positive electrode active material and a sulfide solid electrolyte over time can be suppressed and also the interface resistance is low. The positive electrode active material of the present invention includes particles that have core particles containing a complex oxide of lithium and a metal element and a coating layer arranged on the surface of the core particles, and is used in a solid-state battery containing a sulfide solid electrolyte. The coating layer is composed of an oxide containing Li and M, where M represents one or two or more elements selected from the group consisting of B, Nb, Ti, Zr, Ta, Zn, W, and Al, or M is B when M represents one element. The molar ratio of Li/M on the surface of the coating layer, as obtained by X-ray photoelectron spectroscopy, is from 0.85 to 3.95.

Abstract: Disclosed is an active material that can reduce an interface resistance with a sulfide solid electrolyte and improve the battery performance. The active material exhibits at least one peak in the range of from 0.145 nm to 0.185 nm and at least one peak in the range of from 0.28 nm to 0.31 nm in a radial distribution function obtained through measurement of an X-ray absorption fine structure of the active material. The active material is for use in a solid-state battery. The active material preferably has a core particle, and a coating layer located on the surface of the core particle.

Abstract: A positive electrode active substance for an all solid-state lithium secondary battery, wherein the surface of the present core particles composed of a lithium metal composite oxide having a layered structure containing Li, M element, where M includes at least one element or a combination of two or more elements selected from the group consisting of Ni, Co, Mn, and Al, and O is coated with an amorphous compound containing Li, A, where A represents one element or a combination of two or more elements selected from the group consisting of Ti, Zr, Ta, Nb, Zn, W, and Al, and O, and wherein the D50 is 0.5 to 11 ?m, the value of (|mode diameter?D50|/mode diameter)×100 is 0 to 25%, the value of (|mode diameter?D10|/mode diameter)×100) is 20 to 58%, and the value of average primary particle diameter/D50 is 0.01 to 0.99.

Abstract: A positive electrode active material for an all-solid-state lithium secondary battery, which is capable of improving the rate characteristics, the cycle characteristics, and the initial charge and discharge efficiency even in the case where a sulfide-based solid electrolyte is used, wherein the surface of a lithium-containing composite oxide, referred to as present core particles, is coated with a compound, referred to as, LiAO compound, containing Li, A, where A represents one or more elements selected from the group consisting of Ti, Zr, Ta, Nb, Zn, W, and Al, and O; and a halogen is present on the surface of the present core particles.

Abstract: Provided is a novel positive electrode active material capable of suppressing resistance and improving rate characteristics and cycle characteristics while enhancing lithium ionic conductivity, wherein the surface of particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with a lithium ion conductive oxide such as LiNbO3. Proposed is a positive electrode active material for an all-solid-type lithium secondary battery, wherein the surface of present core particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with an amorphous compound containing Li, A (A represents one or more elements selected from the group consisting of Ti, Zr, Ta, Nb, and Al), and O; and the molar ratio (Li/A) of Li relative to the A element in the surface, as obtained by XPS, is 1.0 to 3.5.

Abstract: A positive electrode active substance for an all solid-state lithium secondary battery having an operating potential of 4.5 V or more at a metal Li reference potential, wherein the surface of the present core particles composed of a spinel-type lithium manganese-containing composite oxide containing at least Li, Mn, O, and two or more elements other than these is coated with an amorphous compound containing Li, A, where A represents one element or a combination of two or more elements selected from the group consisting of Ti, Zr, Ta, Nb, Zn, W, and Al, and O. Primary particles of the present core particles are composed of a polycrystal. The D50 is 0.5-9 ?m, the value of (|mode diameter?D50|/mode diameter)×100 is 0 to 25%, the value of (|mode diameter?D10|/mode diameter)×100 is 20-58%, and the value of the average primary particle diameter/D50 is 0.20-0.99.

Abstract: Provided is a novel positive electrode active material capable of suppressing resistance and improving rate characteristics and cycle characteristics while enhancing lithium ionic conductivity, wherein the surface of particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with a lithium ion conductive oxide such as LiNbO3. Proposed is a positive electrode active material for an all-solid-type lithium secondary battery, wherein the surface of present core particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with an amorphous compound containing Li, A (A represents one or more elements selected from the group consisting of Ti, Zr, Ta, Nb, and Al), and O; and the molar ratio (Li/A) of Li relative to the A element in the surface, as obtained by XPS, is 1.0 to 3.5.

Abstract: A positive electrode active material comprising a lithium metal composite oxide having a layered crystal structure provides a novel lithium metal composite oxide powder which can suppress the reaction with an electrolytic solution and raise the charge-discharge cycle ability of a battery, and can improve the output characteristics of a battery. A lithium metal composite oxide powder comprises a particle having a surface portion where one or a combination of two or more (“surface element A”) of the group consisting of Al, Ti and Zr is present, on the surface of a particle comprising a lithium metal composite oxide having a layered crystal structure, wherein the amount of surface LiOH is smaller than 0.10% by weight, and the amount of surface Li2CO3 is smaller than 0.25% by weight; in an X-ray diffraction pattern, the ratio of an integral intensity of the (003) plane of the lithium metal composite oxide to that of the (104) plane thereof is higher than 1.

Abstract: Proposed is a novel lithium metal composite oxide having a layered structure, which is capable of improving the cycle characteristics in the case of using as a positive electrode active material for a battery. Proposed is a lithium metal composite oxide having a layered structure, which is represented by Li1+xNi1?x-?-?-?Mn?Co?M?O2 (wherein 0?x?0.1, 0.01???0.35, 0.01???0.35, 0???0.05, and M comprises at least one or more elements selected from the group consisting of Al, Mg, Ti, Fe, Zr, W, Y, and Nb), wherein the amount of residual Li2CO3 present in secondary particles is 0.03 to 0.3 wt %.

Abstract: The present invention relates to a positive electrode active material including a lithium metal composite oxide having a layer crystal structure, and provides a novel positive electrode active material for a lithium secondary cell, which can suppress the reaction with an electrolyte solution and can raise the charge-discharge cycle ability of the cell, and can make good the output characteristics of the cell.

Abstract: Provided is a spinel-type lithium metal composite oxide that makes it possible to achieve excellent high-temperature storage characteristics when used as a positive electrode active material of a lithium battery. The spinel-type (Fd-3m) lithium metal composite oxide is characterized by the oxygen occupancy (OCC) thereof as determined by the Rietveld method being 0.965-1.000, the lattice strain thereof as determined by the Williamson-Hall method being 0.015-0.090, and the ratio (Na/Mn) of the molar content of Na to the molar content of Mn satisfying 0.00<Na/Mn<1.00×10?2.

Abstract: A positive electrode active material comprising a lithium metal composite oxide having a layered crystal structure provides a novel lithium metal composite oxide powder which can suppress the reaction with an electrolytic solution and raise the charge-discharge cycle ability of a battery, and can improve the output characteristics of a battery. A lithium metal composite oxide powder comprises a particle having a surface portion where one or a combination of two or more (“surface element A”) of the group consisting of Al, Ti and Zr is present, on the surface of a particle comprising a lithium metal composite oxide having a layered crystal structure, wherein the amount of surface LiOH is smaller than 0.10% by weight, and the amount of surface Li2CO3 is smaller than 0.25% by weight; in an X-ray diffraction pattern, the ratio of an integral intensity of the (003) plane of the lithium metal composite oxide to that of the (104) plane thereof is higher than 1.

Abstract: The present invention relates to a positive electrode active material including a lithium metal composite oxide having a layer crystal structure, and provides a novel positive electrode active material for a lithium secondary cell, which can suppress the reaction with an electrolyte solution and can raise the charge-discharge cycle ability of the cell, and can make good the output characteristics of the cell.

Abstract: Provided is a spinel-type lithium metal composite oxide that makes it possible to achieve excellent high-temperature storage characteristics when used as a positive electrode active material of a lithium battery. The spinel-type (Fd-3m) lithium metal composite oxide is characterized by the oxygen occupancy (OCC) thereof as determined by the Rietveld method being 0.965-1.000, the lattice strain thereof as determined by the Williamson-Hall method being 0.015-0.090, and the ratio (Na/Mn) of the molar content of Na to the molar content of Mn satisfying 0.00<Na/Mn<1.00×10?2.