Abstract: An active material, a solid electrolyte, and a solvent are hard-kneaded to prepare a first electrode material. A dispersion promotion component is added to the first electrode material to prepare a second electrode material. Slurry containing the second electrode material is prepared. An electrode is produced by applying the slurry to a surface of a base material. A composite body is formed by the solid electrolyte adhering to a surface of the active material. The dispersion promotion component promotes dispersion of the solid electrolyte in the solvent.

Abstract: A solid-state battery of the present disclosure includes: a negative electrode layer including a negative electrode active material; a positive electrode layer; a solid electrolyte layer positioned between the positive electrode layer and the negative electrode layer. The negative electrode active material includes: a graphite particle being an aggregate of a plurality of primary particles including graphite, the graphite particle having a void inside; and a solid electrolyte being present in the void. At least a portion of the void may be filled with the solid electrolyte. The void has a minimum diameter of, for example, 1 nm or more and 70 nm or less.

Abstract: An electrode of the present disclosure includes a support and an active material layer that contains an active material, a solid electrolyte, and a carbon-based conductive additive and that has a first main surface not in contact with the support and a second main surface in contact with the support, in which a carbon atom concentration of a surface layer portion of the active material layer at the first main surface is greater than 29.8 at %.

Abstract: An electrode according to the present disclosure includes an active material, a solid electrolyte, and a conductive additive, in which a length of an interface of the conductive additive per unit area of a cross section of the electrode is greater than 0.58 ?m/?m2.

Abstract: A positive-electrode material according to the present disclosure includes a positive-electrode active material and a coating layer covering the positive-electrode active material, wherein the coating layer contains niobium and carbon, the positive-electrode active material and the coating layer constitute a coated active material, and the ratio Nb/C of the niobium content to the carbon content in a surface layer portion of the coated active material is 0.11 or more based on the atomic ratio.

Abstract: A positive-electrode material according to the present disclosure includes a positive-electrode active material and a coating layer covering the positive-electrode active material, wherein the coating layer contains oxygen and lithium, the positive-electrode active material and the coating layer constitute a coated active material, and the ratio Li/O of the lithium content to the oxygen content in a surface layer portion of the coated active material is 0.26 or less based on the atomic ratio.

Abstract: A solid electrolyte composition of the present disclosure includes a solvent and an ion conductor including a solid electrolyte, a binder, and a nitrogen-containing organic substance and being dispersed in the solvent. The solid electrolyte includes a sulfide solid electrolyte, the binder includes a styrenic elastomer, and the nitrogen-containing organic substance includes at least one selected from the group consisting of primary amines, secondary amines, aminohydroxy compounds, and diamines. The primary amines, the secondary amines, the aminohydroxy compounds, and the diamines each have at least one selected from the group consisting of chain alkyl groups having 8 or more carbon atoms and chain alkenyl groups having 8 or more carbon atoms. The mass proportion of the nitrogen-containing organic substance to the solid electrolyte is 0.30 mass % or more.

Abstract: A solid electrolyte composition of the present disclosure includes a solvent and an ion conductor including a solid electrolyte, a binder, and a nitrogen-containing organic substance and being dispersed in the solvent. The solid electrolyte includes a sulfide solid electrolyte, the binder includes a styrenic elastomer, and the nitrogen-containing organic substance is represented by the following compositional formula (1). Where, R1 is a chain alkyl group having 7 or more and 21 or less carbon atoms or a chain alkenyl group having 7 or more and 21 or less carbon atoms, R2 is —CH2—, —CO—, or —NH(CH2)3—, and R3 and R4 are each independently a chain alkyl group having 1 or more and 22 or less carbon atoms, a chain alkenyl group having 2 or more and 22 or less carbon atoms, or hydrogen.

Abstract: The present disclosure provides a cathode material which has improved charge/discharge efficiency; and a battery using the same. The cathode material includes a cathode active material and a first solid electrolyte material; and the first solid electrolyte material contains Li, M and X; however, does not include sulfur. M represents at least one element that is selected from the group consisting of metalloid elements and metal elements other than Li. X represents at least one selected from the group consisting of Cl and Br, and I. The cathode active material includes lithium iron phosphate.

Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte layer disposed between the positive electrode and the negative electrode. The electrolyte layer includes a first layer, a second layer, and a mixture layer disposed between the first layer and the second layer. The first layer includes a first solid electrolyte material. The second layer includes a second solid electrolyte material, the second solid electrolyte material being different from the first solid electrolyte material. The mixture layer includes the first solid electrolyte material and the second solid electrolyte material.

Abstract: An outer casing includes a housing configured to house a battery, a gas adsorbing unit disposed outside the housing and including an adsorbent that can adsorb a first gas generated inside the housing, and a first valve configured to discharge the first gas from the gas adsorbing unit to outside of the outer casing. The first valve may be connected to the gas adsorbing unit. A battery module includes the outer casing and a battery disposed in the housing of the outer casing.

Abstract: An electrode includes an active material layer. The active material layer includes a composite particle and an imidazoline-based compound. The composite particle includes a core particle and a covering layer. The covering layer covers at least part of a surface of the core particle. The core particle includes an active material. The covering layer includes a first layer and a second layer. At least part of the first layer is interposed between the core particle and the second layer. The first layer includes a first solid electrolyte. The second layer includes a second solid electrolyte. The first solid electrolyte is a fluoride. The second solid electrolyte is a sulfide.

Abstract: An active material, a solid electrolyte, and a solvent are hard-kneaded to prepare a first electrode material. A dispersion promotion component is added to the first electrode material to prepare a second electrode material. Slurry containing the second electrode material is prepared. An electrode is produced by applying the slurry to a surface of a base material. A composite body is formed by the solid electrolyte adhering to a surface of the active material. The dispersion promotion component promotes dispersion of the solid electrolyte in the solvent.

Abstract: A positive electrode includes a positive electrode current collector, an adhesive layer, and a positive electrode layer. The positive electrode current collector, the adhesive layer, and the positive electrode layer are stacked in this order. The adhesive layer contains spherical carbon and fibrous carbon as an electrically conductive material, and contains an acrylic binder as an adhesive.

Abstract: There is provided an electrode layer for an all-solid state battery, which contains an electrode active material and a sulfide solid electrolyte, where the sulfide solid electrolyte has an average particle diameter of less than 1 µm and the electrode layer contains an imidazoline-based dispersion material.

Abstract: The present disclosure provides a cathode material which has improved charge/discharge efficiency; and a battery using the same. The cathode material includes a cathode active material and a first solid electrolyte material; and the first solid electrolyte material contains Li, M and X; however, does not include sulfur. M represents at least one element that is selected from the group consisting of metalloid elements and metal elements other than Li. X represents at least one selected from the group consisting of Cl and Br, and I. The cathode active material includes lithium iron phosphate.

Abstract: A negative electrode active material of the present disclosure includes: a graphite particle having a void inside; and a first solid electrolyte. The void has a void size of 1 nm or more and 300 nm or less. The first solid electrolyte is present in the void. The graphite particle has, for example, a plurality of voids inside. The graphite particle has an average void size, determined by a mercury intrusion method, of, for example, 1 nm or more and 300 nm or less.

Abstract: A solid-state battery of the present disclosure includes: a negative electrode layer including a negative electrode active material; a positive electrode layer; a solid electrolyte layer positioned between the positive electrode layer and the negative electrode layer. The negative electrode active material includes: a graphite particle being an aggregate of a plurality of primary particles including graphite, the graphite particle having a void inside; and a solid electrolyte being present in the void. At least a portion of the void may be filled with the solid electrolyte. The void has a minimum diameter of, for example, 1 nm or more and 70 nm or less.

Abstract: A positive-electrode material according to the present disclosure includes a positive-electrode active material and a coating layer covering the positive-electrode active material, wherein the coating layer contains oxygen and lithium, the positive-electrode active material and the coating layer constitute a coated active material, and the ratio Li/O of the lithium content to the oxygen content in a surface layer portion of the coated active material is 0.26 or less based on the atomic ratio.

Abstract: A positive-electrode material according to the present disclosure includes a positive-electrode active material and a coating layer covering the positive-electrode active material, wherein the coating layer contains lithium and carbon, the positive-electrode active material and the coating layer constitute a coated active material, and the ratio C/Li of the carbon content to the lithium content in a surface layer portion of the coated active material is 3.27 or more based on the atomic ratio.