Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery containing negative electrode active material particles in which the negative electrode active material particles include particles of a silicon compound (SiOx: 0.5?x?1.6), in which the negative electrode active material particles are at least partially coated with carbon material, the negative electrode active material particles contain Li in which content of the Li relative to the negative electrode active material particles is 9.7 mass % or more or less than 13.2 mass %, at least part of the Li is present as Li2SiO3, and when the negative electrode active material particles are measured by X-ray diffraction using Cu-K? rays, an intensity Ia of a peak around 2?=47.5° attributable to Si obtained by the X-ray diffraction and a peak intensity Tb of a peak around 2?=18.7° attributable to Li2SiO3 obtained by the X-ray diffraction satisfy 1?Ib/Ia?18.

Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery containing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound (SiOx: 0.5?x?1.6). The silicon compound particle contains a Li compound, at least a part of the silicon compound particle is coated with a carbon material, and at least a part of a surface of the silicon compound particle, a surface of the carbon material, or both of them is coated with a layer containing a compound having a silyl group.

Abstract: A negative electrode active material including negative electrode active material particles, wherein the negative electrode active material particles contain silicon oxide particles coated with a carbon layer, at least a part of the silicon oxide particles contains at least one selected from the group consisting of Li2SiO3, Li4SiO4, and Li6Si2O7, and a part of at least an outermost layer of the negative electrode active material particles is coated with a layer of a plasticizer. This can provide: a negative electrode active material that can increase stability in slurry formation while achieving sufficient battery characteristics; and a negative electrode including such a negative electrode active material.

Abstract: A non-aqueous electrolyte used for a non-aqueous electrolyte secondary battery, including a silane compound represented by the following general formula (1). By this configuration, a highly safe non-aqueous electrolyte and a non-aqueous electrolyte secondary battery even after charge and discharge are provided: Si(R1)t(R2)m(R3)4-1-m??(1) wherein R1 represents a heteroaryl group having 4 to 20 carbon atoms; R2 represents an alkenyl group or an alkynyl group having 2 to 20 carbon atoms; R3 represents an alkyl group having 1 to 20 carbon atoms; and “l” and “m” each independently represents an integer of 1 to 3, provided that 2?1+m?4 is satisfied.

Abstract: A non-aqueous electrolyte used for a non-aqueous electrolyte secondary battery in which a negative electrode contains at least any of a silicon compound, a germanium compound, and a tin compound as a negative electrode active material particle, the non-aqueous electrolyte including a silane compound represented by the following general formula (1). This provides a non-aqueous electrolyte and a non-aqueous electrolyte secondary battery in which a battery cell hardly expands even when a negative electrode material such as a silicon material is used.

Abstract: A negative electrode including negative electrode active material particles, wherein the negative electrode is charged and discharged at least once, the negative electrode active material particles contain silicon oxide particles coated with a carbon layer, and the silicon oxide particles contain Li2SiO3, and in an O1s bonding energy obtained by XPS analysis on a particle inside, an intensity of a peak A obtained near 529.5 eV and an intensity of a peak B obtained near 532.5 eV have a relationship of (intensity of peak A)?(intensity of peak B). Thus, a negative electrode can increase a battery capacity with improvement of initial efficiency and can achieve sufficient battery cycle characteristics.

Abstract: A negative electrode active material containing negative electrode active material particles. The negative electrode active material particles include silicon compound particles each containing an oxygen-containing silicon compound. The silicon compound particle contains at least one of Li2SiO3 and Li2Si2O5. The silicon compound particle has, in a Si K-edge spectrum obtained from a XANES spectrum: a peak P derived from the Li silicate and located near 1847 eV; and a peak Q gentler than the peak P and located near 1851 to 1852 eV. This provides a negative electrode active material that is capable of stabilizing a slurry when the negative electrode active material is used for a secondary battery, and capable of increasing the battery capacity by improving the initial efficiency.

Abstract: A negative electrode which significantly increases capacity while maintaining excellent battery characteristics and a method to produce the negative electrode including a negative electrode current collector having a surface roughened; and a negative electrode active material layer provided on the negative electrode current collector. The negative electrode active material layer contains negative electrode active material particles including a compound of lithium, silicon, and oxygen, and a ratio, O/Si, of the oxygen to the silicon, constituting the negative electrode active material particles is within a range of 0.8 or more to 1.2 or less. The negative electrode active material layer has a multilayer structure composed of two or more layers, and each layer of the multilayer structure of the negative electrode active material layer has, on an upper portion, a layer containing a quadrivalent silicon compound containing at least one or more of lithium and oxygen.

Abstract: A non-aqueous electrolyte liquid including: a non-aqueous solvent; an electrolyte salt dissolved in the non-aqueous solvent; and a silane compound represented by the following general formula (1), Si ( R 1 ) l ? ( R 2 ) m ? ( R 3 ) n ? ( R 4 ) 4 - l - m - n ( 1 ) wherein R represents an alkenyl group having 2 to 20 carbon atoms, R2 represents a substituted or unsubstituted arylethynyl group having 8 to 20 carbon atoms, R3 represents an alkyl group having 1 to 20 carbon atoms, R4 represents an alkynyl group having 2 to 20 carbon atoms, “l” and “m” each independently represent an integer of 1 to 3, “n” represents an integer of 0 to 2, and “l”, “m”, and “n” represent integers satisfying 2?l+m+n?4.

Abstract: A negative electrode including negative electrode active material particles, wherein the negative electrode was charged at least once, the negative electrode active material particles contain silicon oxide particles coated with a carbon layer, and the silicon oxide particles contain Li2SiO3 in at least a part thereof, outermost surfaces of the negative electrode active material particles are covered with a composite coating containing Si, O, C, and H, and a TOF-SIMS spectrum of a surface of the negative electrode active material particles obtained by time-of-flight secondary ion mass spectrometry has at least one negative secondary ion peak of a peak attributed to SiHO3?, a peak attributed to SiO2CH3?, and a peak attributed to SiOCH3?.

Abstract: A non-aqueous electrolyte used for a non-aqueous electrolyte secondary battery in which a negative electrode contains at least any of a silicon compound, a germanium compound, and a tin compound as a negative electrode active material particle, the non-aqueous electrolyte including at least one or more silane compounds selected from silane compounds represented by the following general formulae (1), (2), etc. This provides a non-aqueous electrolyte and a non-aqueous electrolyte secondary battery in which a battery cell hardly expands even when the negative electrode material such as the silicon material is used.

Abstract: A negative electrode active material including negative electrode active material particles, wherein the negative electrode active material particles contain silicon compound particles containing lithium and oxygen, a ratio between oxygen and silicon satisfying SiOx:0.8?X?1.2, and containing Li2SiO3, a Si crystallite size is 10 nm or less, the particles are coated with a carbon coating, and a peak height P1 derived from at least a part of lithium carbonate and a peak height P2 derived from at least a part of Li2SiO3 satisfy a relationship of 2?P2/P1?3.5, the peak of P1 appearing within a range of a diffraction angle 2? of 20 to 21° and the peak of P2 appearing within a range of the diffraction angle 2? of 17 to 20° with X-ray diffraction using CuK? radiation.

Abstract: A negative electrode active material including negative electrode active material particles, wherein the negative electrode active material particles contain silicon oxide particles coated with a carbon layer, and the silicon oxide particles contain Li2SiO3, and a Si2p spectrum obtained by XPS analysis has a strongest peak A near 102 eV, a second strongest peak B corresponding to a low-valent Si compound having a valency of any one of 1 to 3 near 100 eV, and a peak C of Si: 0-valency obtained near 99 eV having an intensity of less than or equal to half of an intensity of the peak A. This provides a negative electrode active material that can increase a battery capacity with improvement of initial efficiency and that can achieve sufficient battery cycle characteristics.

Abstract: A negative electrode includes a negative electrode current collector with a surface having roughened surface, and a negative electrode active material layer provided on the negative electrode current collector, in which the negative electrode active material layer has a multilayer structure, in the multilayer structure, a central portion of each layer in a thickness direction includes a composite compound containing silicon, lithium, and oxygen, a plurality of first regions having a lower amount of oxygen, and a plurality of second regions having a higher amount of oxygen than the first regions, and an average width of each of a maximum width in the first regions and a maximum width in the second regions is 10 nm or less. Thereby the negative electrode can significantly increase a capacity while maintaining excellent battery characteristics.

Abstract: The present invention is a negative electrode active material containing negative electrode active material particles. The negative electrode active material particles include silicon compound particles each containing an oxygen-containing silicon compound. The silicon compound particle contains at least one of Li2SiO3 and Li2Si2O5. The silicon compound particle has, in a Si K-edge spectrum obtained from a XANES spectrum: a peak P derived from the Li silicate and located near 1847 eV; and a peak Q gentler than the peak P and located near 1851 to 1852 eV. This provides a negative electrode active material that is capable of stabilizing a slurry when the negative electrode active material is used for a secondary battery, and capable of increasing the battery capacity by improving the initial efficiency.

Abstract: A negative electrode active material for non-aqueous electrolyte secondary battery, the material including a negative electrode active material particle, wherein the particle contains a silicon compound particle containing a silicon compound containing oxygen, at least part of a surface of the compound particle is coated with carbon layer, the compound particle contains Li2SiO3 as a Li silicate, the Li2SiO3 is a material wherein at least a part of the Li2SiO3 is to change into Li4SiO4 by charging and discharging the particle once or more, and an abundance ratio of the Li2SiO3 is higher than that of the Li4SiO4 before charging and discharging the particle, and the abundance ratio of the Li4SiO4 is higher than that of the Li2SiO3 after charge and discharge at 100 times. Provided is a material that can achieve increase in battery capacity with improvement of initial efficiency, sufficient battery cycle characteristics, and input characteristics.

Abstract: The inventive negative electrode active material for a non-aqueous electrolyte secondary battery contains negative electrode active material particles which include silicon compound (SiOx: 0.5?x?1.6) particles. The negative electrode active material particles are at least partially coated with a carbon material, contain one or more selected from Li2SiO3 and Li2Si2O5, and satisfy Ib/Ia?4.8 and Ic/Ia?6.0 in an X-ray diffraction measurement using a Cu-K? line. Ia represents an intensity of a peak around 2?=28.4° attributable to Si obtained by the X-ray diffraction. Ib represents a peak intensity of a peak attributable to Li2SiO3 obtained by the X-ray diffraction. Ic represents a peak intensity of a peak attributable to Li2Si2O5 obtained by the X-ray diffraction.

Abstract: A negative electrode material containing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound (SiOx: 0.5?x?1.6). The silicon compound particle contains at least one or more of Li2SiO3 and Li4SiO4, and the negative electrode material further contains at least one of a metal compound particle containing a metal compound and an aggregate of the metal compound particle. The negative electrode material is capable of stabilizing a slurry prepared in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle characteristics when it is used as a negative electrode active material for a secondary battery.

Abstract: A negative electrode material containing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound (SiOx: 0.5?x?1.6). The silicon compound particle contains at least one or more of Li2SiO3 and Li4SiO4, and the negative electrode material further contains at least one of a metal compound particle containing a metal compound and an aggregate of the metal compound particle. The negative electrode material is capable of stabilizing a slurry prepared in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle characteristics when it is used as a negative electrode active material for a secondary battery.

Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, containing negative electrode active material particles, including silicon compound particles each containing a silicon compound (SiOx: 0.5?x?1.6) and at least one or more of Li2SiO3 and Li2Si2O5, the material includes a phosphate, the negative electrode active material particles each have a surface containing lithium element, and a ratio mp/ml satisfies 0.02?mp/ml?3, where ml represents a molar quantity of the lithium element and contained per unit mass of the particles, and mp represents a molar quantity of phosphorus element contained per unit mass of the particles. Thereby, a negative electrode active material is capable of stabilizing an aqueous negative electrode slurry prepared in producing a negative electrode of a secondary battery, and capable of improving initial charge-discharge characteristics when the negative electrode active material is used for a secondary battery.