Abstract: A composite active material particle of the present disclosure includes a lithium silicate phase, a plurality of silicon particles dispersed in the lithium silicate phase, and an electron-conductive material dispersed in the lithium silicate phase, the electron-conductive material including a carbon material.

Abstract: A battery includes a first electrode, a second electrode, and a solid electrolyte layer located between the first electrode and the second electrode and including a fibrous material, wherein the solid electrolyte layer includes a first solid electrolyte layer, and a second solid electrolyte layer located between the first solid electrolyte layer and the second electrode, and the content ratio of the fibrous material in the second solid electrolyte layer is higher than the content ratio of the fibrous material in the first solid electrolyte layer.

Abstract: A battery of the present disclosure includes a positive electrode, a negative electrode including graphite and zinc, and a solid electrolyte layer positioned between the positive electrode and the negative electrode. A ratio of a mass of zinc to a sum of a mass of graphite and the mass of zinc in the negative electrode is 10 mass % or more and 60 mass % or less. The above ratio may be 20 mass % or more and 40 mass % or less.

Abstract: A negative electrode material of the present disclosure includes a negative electrode active material, a solid electrolyte, and a coating material coating the negative electrode active material. The coating material is represented by the following composition formula (1), where a, b, and c are each a positive real number, A is at least one selected from the group consisting of P and S, and X is F and O.

Abstract: A positive electrode material contains a positive electrode active material, a solid electrolyte, and a coating material for coating the positive electrode active material, wherein the coating material is denoted by Composition formula (1) below. LiaAbXc (1). Herein, each of a, b, and c is a positive real number, A is at least one selected from the group consisting of N, P, and S, and X contains at least F.

Abstract: A battery of the present disclosure includes: a positive electrode; a negative electrode; and an electrolyte layer disposed between the positive electrode and the negative electrode, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer includes a plurality of silicon layers and a plurality of lithium silicate layers, and the silicon layer and the lithium silicate layer are alternately stacked.

Abstract: A battery of the present disclosure includes a positive electrode, a negative electrode, and an electrolyte layer located between the positive electrode and the negative electrode. The negative electrode includes a negative electrode current collector and a negative electrode active material layer located between the negative electrode current collector and the electrolyte layer. The negative electrode active material layer includes a first active material layer and a second active material layer located between the first active material layer and the electrolyte layer. The first active material layer contains, as a first active material, a material that forms an alloy with Li. The second active material layer contains a second active material and a solid electrolyte, and does not contain a material that forms an alloy with Li.

Abstract: An electrode material of the present disclosure includes an active material and a solid electrolyte. The length of an interface between the active material and the solid electrolyte per unit area of the cross section of the electrode material is 0.29 ?m/?m2 or more, and the filling rate of the electrode material is 80% or more. A battery of the present disclosure includes a first electrode, a second electrode, and an electrolyte layer positioned between the first electrode and the second electrode. At least one selected from the group consisting of the first electrode and the second electrode includes the electrode material of the present disclosure.

Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly including a negative electrode and a positive electrode including a positive electrode active material mix layer containing a lithium-transition metal composite oxide which is a positive electrode active material; a nonaqueous electrolyte; and a battery case that houses the electrode assembly and the nonaqueous electrolyte. The positive electrode active material has a film formed thereon and the film contains 0.04 ?mol to 0.19 ?mol of sulfur per square meter of the specific surface area of particles of the positive electrode active material.

Abstract: A negative electrode for a lithium ion battery 10 includes a negative electrode current collector 11, a negative electrode active material layer 14, and a lithium silicate layer 15. The negative electrode active material layer 14 contains silicon. The lithium silicate layer 15 contains lithium, oxygen, and silicon forming a Li—O—Si bond, and is formed at the interface between the negative electrode current collector 11 and the negative electrode active material layer 14. The negative electrode active material layer 14 and the lithium silicate layer 15 may be composed of columnar bodies.

Abstract: A positive electrode plate 5, a separator 7, and a negative electrode plate 6 are prepared. The positive electrode plate 5, the separator 7, and the negative electrode plate 6 are combined so as to form a spirally-wound electrode assembly 4. A winding end portion 9 of the electrode assembly 4 is fixed with a heat-sensitive adhesive (preferably, a heat-sensitive adhesive tape 10) whose adhesive force can be reduced by heating or cooling. The electrode assembly 4 is placed in an outer casing 1, and then the ambient temperature of the electrode assembly 4 is adjusted so that the electrode assembly 4 is loosened due to reduction in the adhesive force of the heat-sensitive adhesive. An electrolyte solution is injected into the outer casing 1.

Abstract: A lithium ion secondary battery includes: an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator; and an elastic member. The electrode assembly is wound around an axis into a flat shape having a curved end defining a corner portion. The elastic member is arranged inside the electrode assembly and into at least the corner portion of the electrode assembly such that at least a portion of the elastic member is positioned between at least a portion of one of the positive electrode plate and the negative electrode plate and at least a portion of the separator in a direction perpendicular to the axis. The elastic member is made of a material having porosity.

Abstract: An electrode assembly (30) is formed by combining a positive electrode plate (14), a separator (15), and a negative electrode plate (18), and the electrode assembly (30) was wound. An insulating member (21) having a hollow portion (22) is placed on the positive electrode plate (14), the negative electrode plate (18), or the separator (15) before the end of the winding step so that the insulating member (21) is incorporated inside the outermost of the electrode assembly (30) and into a corner portion (31) of the electrode assembly (30) in the winding direction. After a winding end portion (32) of the electrode assembly (30) is fixed, the hollow portion (22) is broken. Thereby, a space (20) resulting from the hollow portion (22) is formed inside the outermost of the electrode assembly (30).

Abstract: A positive electrode plate 5, a separator 7, and a negative electrode plate 6 are prepared. The positive electrode plate 5, the separator 7, and the negative electrode plate 6 are combined so as to form a spirally-wound electrode assembly 4. A winding end portion 9 of the electrode assembly 4 is fixed with a heat-sensitive adhesive (preferably, a heat-sensitive adhesive tape 10) whose adhesive force can be reduced by heating or cooling. The electrode assembly 4 is placed in an outer casing 1, and then the ambient temperature of the electrode assembly 4 is adjusted so that the electrode assembly 4 is loosened due to reduction in the adhesive force of the heat-sensitive adhesive. An electrolyte solution is injected into the outer casing 1.

Abstract: A negative electrode for a lithium ion battery 10 includes a negative electrode current collector 11, a negative electrode active material layer 14, and a lithium silicate layer 15. The negative electrode active material layer 14 contains silicon. The lithium silicate layer 15 contains lithium, oxygen, and silicon forming a Li—O—Si bond, and is formed at the interface between the negative electrode current collector 11 and the negative electrode active material layer 14. The negative electrode active material layer 14 and the lithium silicate layer 15 may be composed of columnar bodies.

Abstract: An electrode assembly (30) is formed by combining a positive electrode plate (14), a separator (15), and a negative electrode plate (18), and the electrode assembly (30) was wound. An insulating member (21) having a hollow portion (22) is placed on the positive electrode plate (14), the negative electrode plate (18), or the separator (15) before the end of the winding step so that the insulating member (21) is incorporated inside the outermost of the electrode assembly (30) and into a corner portion (31) of the electrode assembly (30) in the winding direction. After a winding end portion (32) of the electrode assembly (30) is fixed, the hollow portion (22) is broken. Thereby, a space (20) resulting from the hollow portion (22) is formed inside the outermost of the electrode assembly (30).

Abstract: A lithium ion secondary battery (10) includes: an electrode assembly (30) including a positive electrode plate (14), a negative electrode plate (18), and a separator (15), and wound into a flat shape; and an elastic member (21) having porosity and incorporated inside the outermost of the electrode assembly (30) and into a corner portion (31) of the electrode assembly (30) in the winding direction. The elastic member (21) is formed of a foam of at least one material selected from the group consisting of polyethylene, polypropylene, and polyurethane, for example.

Abstract: A negative electrode 10 for a lithium ion battery of the present invention includes a negative electrode current collector 11, protrusions 13 formed so as to be spaced apart from each other on a surface of the negative electrode current collector 11, columns 12 supported on the protrusions 13 one by one, and a coating layer 15 coating a surface of each of the columns 12. The columns 12 include a negative electrode active material including either one of silicon and tin, and further include lithium absorbed thereinto. The coating layer 15 contains at least one of lithium carbonate and lithium fluoride and is formed by exposing the columns 12 to an atmosphere with a dew point temperature of ?60° C. or higher and 0° C. or lower.

Abstract: An object of the present invention is to provide a non-aqueous electrolyte secondary battery that is excellent in cycle characteristics even in a high-temperature environment and high in thermal stability. The non-aqueous electrolyte secondary battery of the present invention comprises at least one of an active material A and an active material C, and an active material B as positive electrode active materials. The active material A is LixCoO2 (0.9?x?1.2). The active material B is LixNiyMnzM1-y-zO2 (0.9?x?1.2, 0.1?y?0.5, 0.2?z?0.5, 0.2?1?y?z?0.5 and 0.9?y/z?2.5; and M is at least one selected from the group consisting of Co, Mg, Al, Ti, Sr, Ca, V, Fe, Y, Zr, Mo, Tc, Ru, Ta, W and Re). The active material C is LixCo1-aMaO2 (0.9?x?1.2 and 0.005?a?0.1; and M is at least one selected from the group consisting of Mg, Al, Ti, Sr, Mn, Ni, Ca, V, Fe, Y, Zr, Mo, Tc, Ru, Ta, W, Re, Yb, Cu, Zn and Ba).