Abstract: Disclosed is a positive electrode active material having an O2-type structure and having improved weight energy density. The positive electrode active material of the present disclosure comprises Li-containing oxide particles, wherein the Li-containing oxide particles have an 02-type structure; the Li-containing oxide particles at least comprise at least one element among Mn, Ni, and Co; Li; and O as constituent elements; the Li-containing oxide particles have an average particle diameter of 2.0 ?m or more; and the Li-containing oxide particles have an average aspect ratio of 1.0 or greater and 3.0 or less.

Abstract: Disclosed is a positive electrode active material having a P2-type structure and having a large energy density. The positive electrode active material of the present disclosure comprises a Na-containing oxide. The Na-containing oxide particles have a P2-type structure. The Na-containing oxide particles at least comprise at least one element among Mn, Ni, and Co; Na; and O as constituent elements. The Na-containing oxide particles have an average particle diameter of 2.0 ?m or more. The Na-containing oxide particles have an average aspect ratio of 1.0 or greater and 3.0 or less.

Abstract: Disclosed is a positive electrode active material having an O2 type structure and having a large capacity. The positive electrode active material of present disclosure includes Li containing oxide particles, wherein the Li containing oxide particles have O2 type structure and predetermined chemical composition. The Li containing oxide particles have a particle diameter D50 of more than 0 ?m and 3.0 ?m or less, a particle diameter D90 of 2.0 ?m or more and 6.0 ?m or less. The X-ray diffraction pattern of the Li containing oxide particles satisfies 0?I2/I1?0.5, wherein, I1 is an X-ray diffraction peak intensity derived from (002) plane of O2 type structure, and I2 is an X-ray diffraction peak intensity derived from (003) plane of O3 type structure.

Abstract: The disclosed secondary battery includes a cathode active material layer, a solid electrolyte layer, and an anode active material layer, wherein the cathode active material layer includes a cathode active material having a O2 type construction, and the cathode active material layer includes an inorganic solid electrolyte having a Young's modulus of 30 GPa or less.

Abstract: Disclosed is a method of increasing the capacity of a P2 type positive electrode active material. A method of manufacturing a positive electrode active material of the present disclosure includes obtaining a Na containing transition metal oxide having a P2 type structure, and further doping the Na containing transition metal oxide with Na.

Abstract: Disclosed is a technique that can improve capacity of a positive electrode active material having an O2-type structure when applied to a positive electrode active material layer of a lithium-ion battery. The positive electrode mixture of the present disclosure comprises a first active material and a second active material, the first active material has an O2-type structure and is plate-like, the second active material has an O2-type structure and is spherical, a ratio D1L/D2 of a long diameter D1L of the first active material to a diameter D2 of the second active material is 0.1 or greater and 1.5 or less, and a ratio of the first active material relative to a total of the first active material and the second active material is 10% by mass or greater and 90% by mass or less.

Abstract: Disclosed is a positive electrode active material particle having an O2-type structure and having excellent rate characteristics and capacity. The positive electrode active material particle of the present disclosure has an O2-type structure, has a chemical composition represented by LiaNabMnx?pNiy?qCoz?rMp+q+rO2, wherein 1.0<a<1.30; 0?b?0.20; x+y+z=1; and 0?p+q+r?0.15, and M is at least one element selected from B, Mg, Al, K, Ca, Ti, V, Cr, Fe, Cu, Zn, Ga, Ge, Sr, Y, Zr, Nb, Mo, and W, and is spherical.

Abstract: Disclosed is a Na containing oxide having a P2 type structure wherein O3 phase is reduced. A method for producing a Na containing oxide of the present disclosure comprises obtaining a precursor containing at least one element of Mn, Ni and Co, coating the surface of the precursor with a Na source to obtain a composite, and firing the composite to obtain the Na containing oxide having the P2 type structure, wherein the atmosphere in firing the composite contains 50% by volume or more of oxygen.

Abstract: Disclosed is a method for increasing capacity of an O2-type positive electrode active material. The method for manufacturing a positive electrode active material of the present disclosure comprises obtaining a Na-containing transition metal oxide having a P2-type structure, substituting at least a portion of Na in the Na-containing transition metal oxide with Li by ion exchange to obtain a Li-containing transition metal oxide having an O2-type structure, and further doping the Li-containing transition metal oxide with Li in a step separate from the ion exchange.

Abstract: Disclosed is a method of increasing the capacity of an O2 type positive electrode active material. The method of manufacturing a positive electrode active material according to the present disclosure comprises firing a precursor containing Na and transition metal elements, followed by cooling to obtain a Na containing transition-metal oxide having a P2 type structure; and replacing at least a portion of Na of the Na containing transition-metal oxide with Li by ion-exchange to obtain a positive electrode active material having an O2 type structure, wherein after firing the precursor, the cooling rate from 250° C. to cooling end-temperature is 20° C./min or higher.

Abstract: A method of producing a positive electrode active material comprises the following (a) and (b): (a) preparing a slurry by dispersing an active material particle in a coating liquid; and (b) performing spray drying to dry the slurry to produce a positive electrode active material. The active material particle includes an O2-type layered oxide. The coating liquid includes a solute and a solvent. The solute includes at least one selected from the group consisting of Nb, P, and B. The slurry has a solid concentration of more than 42% and not more than 51%.

Abstract: A positive electrode active material of the present disclosure is a positive electrode active material for an all-solid-state lithium ion secondary battery that is represented by a general formula: LixTi2x-1Mn2-3xO (0.500<x<0.650) or a general formula: LixNbx-0.5Mn1.5-2xO (0.500<x<0.650) and that has an irregular rock salt structure. At least a part of the positive electrode active material of the present disclosure may be covered with a LiNbO3 coating.

Abstract: The rate characteristic of O2-type positive electrode active material particle is improved. The positive electrode active material particle of the first mode have an O2-type structure, comprise at least one transition metal elements from among Mn, Ni and Co, with Li and O, as constituent elements, and are spherical. The positive electrode active material particle of the second mode have at least one shell and at least one void in the cross-sectional structure, wherein the shell has an O2-type structure, the shell comprises at least one transition metal element from among Mn, Ni and Co, with Li and O, as constituent elements, the surface of the shell comprises crystallites, and the void is present along the inner wall of the shell.

Abstract: The reversible capacity of P2-type positive electrode active material particle is increased. A positive electrode active material particle of the present disclosure has a P2-type structure, comprises at least one transition metal elements from among Mn, Ni and Co, with Na and O, as constituent elements, and is spherical.

Abstract: Disclosed is a positive electrode active material for a lithium-ion battery, wherein the positive electrode active material has small volume changes during charging and discharging, and when applied to a battery, can improve the cycle characteristics of the battery. The positive electrode active material of the present disclosure has a disordered rock salt structure belonging to space group Fm-3m, and has a composition represented by Li1+xTiyVzO2 (where 0<x?0.20, 0<y?0.40, and 0.40?z?0.85).

Abstract: A main object of the present disclosure is to provide an all solid state battery in which occurrence of short circuit is inhibited. The present disclosure achieves the object by providing an all solid state battery including an anode including at least an anode current collector, a cathode, and a solid electrolyte layer arranged between the anode and the cathode; wherein a protective layer containing a Mg-containing particle that contains at least Mg, and also contains a polymer, is arranged between the anode current collector and the solid electrolyte layer; and a contacting area rate in an interface between the solid electrolyte layer and the protective layer is 50% or more.

Abstract: A main object of the present disclosure is to provide an all solid state battery in which occurrence of short circuit is inhibited. The present disclosure achieves the object by providing an all solid state battery comprising an anode including at least an anode current collector, a cathode, and a solid electrolyte layer arranged between the anode and the cathode; wherein a protective layer containing a Mg-containing particle that contains at least Mg, and also containing a polymer, is arranged between the anode current collector and the solid electrolyte layer.

Abstract: A main object of the present disclosure is to provide an all solid state battery in which occurrence of short circuit is inhibited. The present disclosure achieves the object by providing an all solid state battery comprising an anode including at least an anode current collector, a cathode, and a solid electrolyte layer arranged between the anode and the cathode; wherein a protective layer containing a Mg-containing particle that contains at least Mg, and also containing a polymer, is arranged between the anode current collector and the solid electrolyte layer; the solid electrolyte layer contains a solid electrolyte in a granular shape; and when X designates an average particle size D50 of the solid electrolyte and Y designates an average thickness of the solid electrolyte layer, X/Y is 0.0125 or more and 0.02 or less.

Abstract: To reduce an electric resistance of an all-solid-state battery, the all-solid-state battery includes: an anode active material layer; a cathode active material layer; and a solid electrolyte layer disposed between the anode active material layer and the cathode active material layer, wherein the cathode active material layer contains S, Li2S, P2S5, and a single-walled carbon nanotube.

Abstract: To improve the capacity of an all-solid-state battery, a method of manufacturing an all-solid-state battery having a cathode that contains sulfur include: performing initial charge and discharge separately at least in three cycles until a capacity of the battery reaches a design capacity, wherein a charge discharge capacity in a first cycle is at most 30% of the design capacity, and charge and discharge in a second cycle and after are performed, so that a charge discharge capacity in an n-th cycle is increased at least 1.15 times as much as a charge discharge capacity in an (n-1)-th cycle.