Abstract: In the present disclosure, the problem is solved by providing an electrode active material obtained by agglomerating a plurality of primary particles with a binder, wherein: the primary particles are a Si-based active material containing a Si element; the binder is an organic polymer having a tensile modulus not less than 0.10 MPa and not more than 1100 MPa; a ratio of the binder relative to a total of the primary particles and the binder is not less than 1 weight % and not more than 20 weight %; and a particle size D50 of the electrode active material is not less than 2.5 ?m and not more than 20 ?m.

Abstract: A main object of the present disclosure is to provide an electrode active material capable of suppressing the volume change of the electrode layer. The present disclosure achieves the object by providing an electrode active material including a secondary particle that is an aggregation of a plurality of primary particle, wherein the primary particle is a Si-based active material containing a Si element, and a particle size D10 (?m) and a particle size D50 (?m) of the secondary particle satisfy the specified formula (1).

Abstract: A solid-state battery has a first collector, a first electrode layer, an electrolyte layer, a second electrode layer and a second collector in that order, wherein the first collector includes a resin layer that contacts the first electrode layer, the first electrode layer contains an electrode active material, and the electrode active material has an active material resin.

Abstract: The present disclosure relates to an electrode active material and a battery. An electrode active material using a granulated body. The granulated body is a secondary particle provided by primary particles containing a Si element with use of a binder. In the electrode active material, a content of an organic solvent is 950 ppm or less.

Abstract: An electrode active material includes primary particles containing a silicon element, the primary particles being provided as secondary particles by a binder. The primary particles are porous, and an average pore size of pores of the primary particles is more than 4.1 nm. A molecular size D50 in a molecular size distribution of the binder is less than 1,859 nm. The molecular size D50 is equal to or larger than the average pore size.

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: An electrode active material in the present disclosure has at least one O2-like structure selected from among an O2-type structure, a T#2-type structure, and an O6-type structure, and has a chemical composition shown as LiaNabNix-pCOy-qMnz-rMp+q+rO2(0<a?1.00, 0?b?0.20, 0.15<x<0.35, 0.15<y<0.45, 0.25<z<0.50, x+y+z=1, and 0?p+q+r<0.17 are satisfied, and an element M is at least one element selected from among B, Mg, Al, K, Ca, Ti, V, Cr, Fe, Cu, Zn, Ga, Ge, Sr, Y, Zr, Nb, Mo, and W).

Abstract: An electrode active material in the present disclosure has at least one O2-like structure selected from among of an O2-type structure, a T#2-type structure, and an O6-type structure. The crystallite size of the O2-like structure that is measured by XRD is 400 ? or more and 1000 ? or less.

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: When a cross-section of an electrode active material of this disclosure is observed, relationships 2.30?A2/A1?44.00 and 0.50?A3/A1?1.90 are met. Here, A1 is an area ratio of an O2-type structure in the cross-section; A2 is an area ratio of an O6-type structure in the cross-section; and A3 is an area ratio of a T #2-type structure in the cross-section.

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; 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: A cathode material has the chemical formula Li4+?Mx1M?y1M?z1O8 or Li2+?Mx2M?y2M?z2O4 where 0???1, x1, y1, z1 are integers (+/?0.5) and x1+y1+z1=4, and x2, y2, z2 are integers (+/?0.05) and x2+y2+z2=2. A method for discovering a cathode material includes estimating synthesizability for a plurality of cathode material compositions, selecting a first subset of cathode material compositions from the plurality of cathode material compositions as a function of the estimated synthesizability and metal-ion diffusion availability, estimating voltage discharge, charge capacity, and oxygen stability for the first subset of cathode material compositions, and selecting a second subset of cathode material compositions from the first subset plurality of cathode material compositions as a function of the estimated voltage discharge, charge capacity, and oxygen stability.

Abstract: A lithium-ion battery having low resistance is disclosed. The lithium-ion battery of the present disclosure comprises a positive electrode active material layer, an electrolyte layer, and a negative electrode active material layer, wherein the positive electrode active material layer comprises a positive electrode active material having a Li-deficient O2-type structure and a sulfide solid electrolyte, and a Raman spectrum of the positive electrode active material layer satisfies relationships of IR1/IR2?0.20 and IR3/IR2?0.20 (IR1: peak intensity from P2S64? in the Raman spectrum, IR2: peak intensity from PS43? in the Raman spectrum, and IR3: peak intensity from S—S in the Raman spectrum).

Abstract: A cathode for a battery includes a cathode material with the chemical formula Li1+?FexCryO2 where 0???1, and ?+x+y=2. In some variations, the cathode material has a disordered rock-salt crystal structure and the chemical formula Li1+?FexCryO2 where 0???1, and ?+x+y=2. And in at least one variations, a method of forming the cathode material includes wet ball milling solid precursors of lithium, iron, and chromium and forming a slurry, drying the slurry and forming a powder, sintering the powder, and dry ball milling the powder and forming the cathode material with the disordered rock-salt crystal structure and the chemical formula Li1+?FexCryO2 where 0???1, and ?+x+y=2.

Abstract: Disclosed is an active material having an O2-type structure and having high capacity and low resistance. The active material secondary particle of the present disclosure comprises a plurality of primary particles and a Li-ion conducting material. The plurality of primary particles have an O2-type structure. A particle diameter of the plurality of primary particles is 1.5 ?m or less. The plurality of primary particles are joined to each other via the Li-ion conducting material.

Abstract: A positive electrode active material of this disclosure has an O2-type structure and an amount of carbon of 500 ppm or less. A manufacturing method of a positive electrode active material of this disclosure includes exchanging at least some of Na ions of a Na-containing oxide having a P2-type structure with Li ions to obtain a Li-containing oxide having an O2-type structure, and heating the Li-containing oxide to reduce an amount of carbon in the Li-containing oxide.

Abstract: Disclosed is a manufacturing method for a positive electrode active material having an O2-type structure and having low resistance when applied to a solid battery. The manufacturing method of the present disclosure is a manufacturing method for a positive electrode active material used in solid batteries, comprising obtaining Na-containing oxide particles having a P2-type structure, and subjecting at least a portion of Na in the Na-containing oxide particles to ion exchange with Li to obtain Li-containing oxide particles having an O2-type structure, wherein the Na-containing oxide particles are spherical particles having an average particle diameter of 1.0 ?m or more and less than 3.5 ?m, and the Li-containing oxide particles are spherical particles having a hollow single-layer structure.

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.