Abstract: A lithium secondary battery including a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte having lithium-ion conductivity. At the negative electrode, lithium metal deposits during charging, and the lithium metal dissolves during discharging. The negative electrode has a porous resin substrate, and a lithium metal layer laminated with the porous resin substrate. The porous resin substrate has a porous region in which the lithium metal layer is not packed.

Abstract: A lithium secondary battery includes an electrode group having a positive electrode, a negative electrode, and a separator. When D represents a length in a radial direction from an inner circumferential surface to an outer circumferential surface of the electrode group in a cross section perpendicular to a winding axis of the electrode group in a discharged state, the electrode group in the discharged state includes a first region that is within a distance of (¼)×D from the inner circumferential surface of the electrode group and a second region that is within a distance of (¼)×D from the outer circumferential surface of the electrode group. In the electrode group in the discharged state, an inter-electrode distance X1 between the positive electrode and the negative electrode in the first region and an inter-electrode distance X2 between the positive electrode and the negative electrode in the second region have a relationship: 2?X1/X2.

Abstract: A secondary battery includes: a wound electrode group including a pair of electrodes and a separator disposed between the pair of electrodes; a core member disposed in a hollow part of the electrode group; and a non-aqueous electrolyte. At least one of the pair of electrodes includes an active material layer and a resin film supporting the active material layer.

Abstract: A lithium secondary battery includes: a wound electrode group including a positive electrode, a negative electrode including a negative electrode current collector, and a separator disposed between the positive electrode and the negative electrode; a core member disposed in a hollow part of the electrode group; and a non-aqueous electrolyte having lithium ion conductivity. Lithium metal is deposited on the negative electrode when the battery is charged, and the lithium metal dissolves when the battery is discharged. The negative electrode current collector is an austenitic stainless steel foil or an oxygen-free copper foil.

Abstract: A lithium secondary battery including a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte having lithium-ion conductivity. At the negative electrode, lithium metal deposits during charging, and the lithium metal dissolves during discharging. The negative electrode includes a resin film, and a lithium metal layer laminated with the resin film.

Abstract: A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, and the alkali metals include at least K and Li.

Abstract: The present invention aims to provide a method for improving the fluidity of a crystal nucleating agent for polyolefin resins without impairing other properties, and a polyolefin resin composition containing the crystal nucleating agent with improved fluidity and having excellent properties including transparency, and a molded article thereof. Adjustment to specific characteristics can improve the fluidity of a crystal nucleating agent for polyolefin resins, and the use of such a crystal nucleating agent having specific characteristics remarkably improves the workability during molding processing and provides a polyolefin resin composition excellent in properties such as transparency, and a molded article thereof.

Abstract: A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, the alkali metals include at least Na and Li, and an atomic ratio: Na/Li of Na to Li is 0.1 to 7.1.

Abstract: A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, and the alkali metals include at least Na and K.

Abstract: Disclosed is a lithium secondary battery (10) including a positive electrode (11) containing a positive electrode active material capable of absorbing and releasing lithium ions, a negative electrode (12) including a negative electrode current collector, a separator (13) disposed between the positive electrode (11) and the negative electrode (12), and a nonaqueous electrolyte having lithium ion conductivity. At the negative electrode, lithium metal deposits during charging, and the lithium metal dissolves during discharging. The negative electrode current collector includes an austenitic stainless steel.

Abstract: A negative electrode active material for a secondary battery includes a silicate composite particle. The silicate composite particle contains silicate phases, silicon particles dispersed in the silicate phases, and a carbon phase. The silicate phases contain at least one selected from the group consisting of an alkali metal and an alkaline earth metal. At least parts of the carbon phase coat at least parts of surfaces of the silicon particles.

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The negative electrode includes a lithium alloy containing magnesium. At the negative electrode, a lithium metal deposits during charge, and the lithium metal dissolves during discharge. The non-aqueous electrolyte contains a hydrofluoroether and lithium ions.

Abstract: This negative electrode active material for a secondary cell which is one aspect of the present disclosure comprises: a silicate phase that contains Li, Si, and Mx (Mx alkali metal, alkaline earth metal, and an element other than Si); silicon particles dispersed in the silicate phase; and oxide particles that contain Zr dispersed in the silicate phase. The content of each element with respect to the total of the elements other than oxygen in the silicate phase is 3 to 45 mol % for Li, 40 to 78 mol % for Si, and 1 to 40 mol % for Mx.

Abstract: A negative electrode active material for a secondary battery includes composite particles. The composite particles include a lithium silicate phase and a silicon phase dispersed in the lithium silicate phase, wherein the silicon phase has lined portions in the lithium silicate phase, a maximum diameter D1 and a minimum diameter D2 of the lined portions satisfy 3?D1/D2. The composite particles include a metal Me dispersed in the lithium silicate phase, and the metal Me is at least one selected from the group consisting of Fe, Pb, Zn, Sn, Cu, Ni, Cr, Zr, and Ti.

Abstract: A negative electrode active material for non-aqueous electrolyte secondary batteries, including: lithium silicate composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, the lithium silicate phase being an oxide phase including Li, Si, O, and M, where M is an element other than the following elements: Group 1 elements of alkali metals, Group 16 elements of oxygen group, Group 18 elements of rare gas, and Si. An amount of each element relative to a total amount of Li, Si and M in the lithium silicate phase is 3 to 55 mol % for Li, 25 mol % or more for Si, and 3 to 50 mol % for M. A carbon material is present inside the lithium silicate composite particles; and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%.

Abstract: A lithium ion battery including a negative electrode having a negative electrode active material layer that contains lithium silicate particles and a binder. The lithium silicate particles include composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, wherein a carbon material is present inside the composite particles, and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%. The binder includes at least a first resin, wherein the first resin is at least cue selected from the group consisting of polyacrylic acid, a polyacrylic acid salt, and their derivatives. The first resin is contained in an amount of 2 mass % or less in the negative electrode active material layer.

Abstract: A negative electrode active material according to one embodiment of the present disclosure comprises: a composite oxide phase that contains Li, Si, Al and B; and Si particles that are dispersed in the composite oxide phase. Relative to the total number of moles of elements (excluding O) contained in the composite, oxide phase, the content of Li is from 5% by mole to 20% by mole (inclusive), the content of Si is from 50% by mole to 70% by mole (inclusive), the content of Al is from 12% by mole to 25% by mole (inclusive), and the content of B is from 12% by mole to 25% by mole (inclusive).

Abstract: Disclosed is a lithium secondary battery (10) including a positive electrode (11) containing a positive electrode active material capable of absorbing and releasing lithium ions, a negative electrode (12) including a negative electrode current collector, a separator (13) disposed between the positive electrode (11) and the negative electrode (12), and a nonaqueous electrolyte having lithium ion conductivity. At the negative electrode, lithium metal deposits during charging, and the lithium metal dissolves during discharging. The oxygen content in the negative electrode current collector is 50 ppm or less, and the negative electrode current collector has a breaking strength of 300 MPa or less and has a breaking elongation of 4% or more.

Abstract: A negative electrode active material for a secondary battery includes composite particles. The composite particles include a lithium silicate phase and a silicon phase dispersed in the lithium silicate phase, wherein the silicon phase has lined portions in the lithium silicate phase, a maximum diameter D1 and a minimum diameter D2 of the lined portions satisfy 3?D1/D2. The composite particles include a metal Me dispersed in the lithium silicate phase, and the metal Me is at least one selected from the group consisting of Fe, Pb, Zn, Sn, Cu, Ni, Cr, Zr, and Ti.

Abstract: A negative electrode active substance particle according to one embodiment of the present invention, comprises a mother particle that has: a silicate phase that includes Na, Si, and at least one element selected from M, M1, M2, M3 and M4 (M is an alkali earth metal, and M1, M2, M3 and M4 are elements other than alkali metals, alkali earth metals or Si); and silicon particles dispersed in the silicate phase. The contents of the elements in the silicate phase are: 9-52 mol % of Na; 3-50 mol % of M, M1, M2, M3 and M4; and at least 25 mol % of Si.