Abstract: The present invention relates to a negative electrode material for nonaqueous electrolyte secondary batteries, which is composed of a silicon composite body that has a structure wherein microcrystals or fine particles of silicon are dispersed in a substance having a composition different from that of the microcrystals or fine particles, said silicon composite body having a crystallite size of the microcrystals or fine particles of 8.0 nm or less as calculated using Scherrer's equation on the basis of the half width of the diffraction peak belonging to Si(220) in an X-ray diffraction. The present invention is able to provide a negative electrode material for nonaqueous electrolyte secondary batteries, which has excellent coulombic efficiency, and a nonaqueous electrolyte secondary battery.

Abstract: A negative electrode active material including: a particle of negative electrode active material containing silicon-based material of SiOx (0.5?x?1.6); wherein the intensity A of a peak in a Si-region given in the chemical shift region of from ?50 to ?95 ppm and the intensity B of a peak in a SiO2-region given in the chemical shift region of from ?96 to ?150 ppm in a 29Si-MAS-NMR spectrum of the silicon-based material satisfy a relationship that A/B?0.8. This provides a negative electrode active material which can increase a battery capacity, and can improve cycle characteristics and initial charge/discharge characteristics when used as a negative electrode active material for a lithium ion secondary battery.

Abstract: The present invention is a negative electrode active material for a negative electrode active material layer of a lithium ion secondary battery, wherein: the negative electrode active material comprises silicon-based material consisting of SiOx (0.5?x?1.6); and the negative electrode active material has two or more peaks in a region of a bond energy ranging from 520 eV to 537 eV in an O 1s peak shape given in an X-ray photoelectron spectroscopy. As a result, it is possible to provide a negative electrode active material in which a battery capacity can be increased and cycle characteristics and initial charge/discharge characteristics can be improved when used as a negative electrode active material for a lithium ion secondary battery.

Abstract: The present invention relates to a negative electrode material for nonaqueous electrolyte secondary batteries, which is composed of a silicon composite body that has a structure wherein microcrystals or fine particles of silicon are dispersed in a substance having a composition different from that of the microcrystals or fine particles, said silicon composite body having a crystallite size of the microcrystals or fine particles of 8.0 nm or less as calculated using Scherrer's equation on the basis of the half width of the diffraction peak belonging to Si(220) in an X-ray diffraction. The present invention is able to provide a negative electrode material for nonaqueous electrolyte secondary batteries, which has excellent coulombic efficiency, and a nonaqueous electrolyte secondary battery.

Abstract: A lithium-cobalt-based composite oxide used for a positive electrode active material of an electrochemical device, wherein the lithium-cobalt-based composite oxide has elutable fluoride ions, the elutable fluoride ions being eluted to an eluate when the lithium-cobalt-based composite oxide is dispersed to ultrapure water, in a mass ratio of 500 ppm or more and 15000 ppm or less in comparison with the lithium-cobalt-based composite oxide, and the lithium-cobalt-based composite oxide has a composition shown by the following general formula (1): Li1-xCo1-zMzO2-aFa (?0.1?x<1, 0?z<1, 0?a<2) . . . (1) (wherein, M represents one or more kinds of metal element selected from the group of Mn, Ni, Fe, V, Cr, Al, Nb, Ti, Cu, and Zn).

Abstract: A carbon coating-treatment apparatus configured to introduce organic gas into the furnace tube through the gas introduction tube while stirring raw material particles introduced into the furnace tube with the stirring blade to coat the raw material particles with carbon coating, wherein the stirring blade is configured to have a proportion satisfying relation of V2/V1?0.1, where V1 is a time-averaged volume of a portion of the stirring blade positioned in the furnace tube, V2 is a time-averaged volume of a portion of the stirring blade positioned in a region of the furnace tube except for a cylindrical region being in a distance of R/10 or less from the central axis of the furnace tube, and R is the inner diameter of the furnace tube. A carbon coating-treatment apparatus that can sufficiently coat raw material particles with uniform carbon coating to produce particles having carbon coating in high productivity.

Abstract: The present invention provides a negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5?x?1.6, the negative electrode active material particles at least partially coated with a carbon coating, the carbon coating exhibiting a peak at 2?=25.5° having a half width of 1.5° to 4.5° in an X-ray diffraction spectrum measured after separating the carbon coating from the negative electrode active material particles, the carbon coating exhibiting scattering peaks at 1330 cm?1 and 1580 cm?1 in Raman spectrum obtained by Raman spectrometry measured after separating the carbon coating from the negative electrode active material particles, wherein a ratio of an intensity of the scattering peak at 1330 cm?1 to that at 1580 cm?1 satisfies 0.7<I1330/I1580<2.0.

Abstract: The present invention is a lithium-phosphorus-based composite oxide/carbon composite used for a positive electrode active material of an electrochemical device, including lithium-phosphorus-based composite oxide with the surface being coated with carbon, wherein the lithium-phosphorus-based composite oxide/carbon composite has elutable fluoride ions, which are eluted to an elute from the composite dispersed to ultrapure water, in a mass ratio of 500 ppm or more and 15000 ppm or less in comparison with the lithium-phosphorus-based composite oxide/carbon composite, and the lithium-phosphorus-based composite oxide has a composition of the following general formula (1): Li1-xFe1-zMzPO4-aFa(?0.1?x<1,0?z?1,0?a?4)??(1) (wherein, M represents one or more kinds of metal element selected from the group of Mn, Ni, Co, V, Cr, Al, Nb, Ti, Cu, and Zn).

Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound (SiOx where 0.5?x?1.6), the negative electrode active material particles being coated with a carbon coating composed of a substance at least partially containing carbon, the carbon coating having a density ranging from 1.2 g/cm3 to 1.9 g/cm3, the negative electrode active material particles having a characteristic of type II or type III adsorption-desorption isotherm in the IUPAC classification, as obtained by adsorption-desorption isotherm measurement with nitrogen gas. This negative electrode active material can increase the battery capacity and improve the cycle performance and battery initial efficiency.

Abstract: The present invention provides a negative electrode for a non-aqueous electrolyte secondary battery, the negative electrode comprising a negative electrode active material layer containing: negative electrode active materials including carbon active material and silicon active material composed of SiOx at least partially coated with lithium carbonate where 0.5?x?1.6; and binders including carboxymethyl cellulose or metal salt thereof, polyacrylic acid or metal salt thereof, and styrene-butadiene rubber or polyvinylidene fluoride, and a non-aqueous electrolyte secondary battery including this negative electrode. The negative electrode can increase the battery capacity and improve the cycle performance and first charge and discharge efficiency.

Abstract: The present invention is a negative electrode material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5?x?1.6, the silicon compound being coated with a carbon coating layer composed of a carbon component, wherein the negative electrode active material particles contain a SiO2 component having a tridymite structure and exhibit a diffraction peak around 21.825° with a half width (2?) of 0.15° or less in X-ray diffraction. This negative electrode material for a non-aqueous electrolyte secondary battery can increase the battery capacity and improve the cycle performance and the initial charge and discharge performance.

Abstract: The present invention is a negative electrode material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles composed of a silicon compound (SiOx, where 0.5?x?1.6) containing a lithium compound, the negative electrode active material particles being coated with a coating containing at least two of a substance having two or more hydroxyl groups per molecule, phosphoryl fluoride, lithium carbonate, and a hydrocarbon that exhibits a positive ion spectrum CyH2 (1?y?3 and 2?z?5) when subjected to TOF-SIMS. There can be provided a negative electrode material for a non-aqueous electrolyte secondary battery, a non-aqueous electrolyte secondary battery including a negative electrode using this negative electrode material, and a method of producing negative electrode active material particles that can increase the battery capacity and improve the cycle performance and initial charge and discharge performance.

Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery contains negative electrode active material particles containing a silicon compound expressed by SiOx, where 0.5?x?1.6, and a coating layer composed of an organic polymer coating the silicon compound, the silicon compound containing a lithium compound on its surface or inside.

Abstract: The present invention is a negative electrode material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx, where 0.5?x?1.6, the silicon compound containing in its interior a lithium compound and one or more ions selected from Group 1 metal ions, Group 2 metal ions, and substitutable ammonium ions. This negative electrode material for a non-aqueous electrolyte secondary battery can increase the battery capacity and improve the cycle performance and the battery initial efficiency.

Abstract: A negative electrode active material for a negative electrode material of a non-aqueous electrolyte secondary battery, includes a silicon-based material expressed by SiOx where 0.5?x?1.6 and either or both of a crystalized fluorine compound and a compound containing —CF2—CF2— units in at least a part of a surface layer of the negative electrode active material, the silicon-based material containing at least one of Li6Si2O7, Li2Si3O5, and Li4SiO4. There can be provided a negative electrode active material that can increase the battery capacity and improve the cycle performance and initial charge and discharge performance when used for a lithium-ion secondary battery, as well as a lithium-ion secondary battery having a negative electrode using this negative electrode active material.

Abstract: The present invention is directed to a negative electrode material for a non-aqueous electrolyte secondary battery, including a conductive powder composed of silicon-based active material particles coated with a conductive carbon film, in which the conductive carbon film exhibits a d-band having a peak half width of 100 cm?1 or more as determined from a Raman spectrum of the conductive carbon film. The invention provides a negative electrode material for a non-aqueous electrolyte secondary battery that has excellent cycle performance and keeps high charge and discharge capacity due to use of a silicon-based active material, a method of producing the negative electrode material for a non-aqueous electrolyte secondary battery, and a non-aqueous electrolyte secondary battery.

Abstract: The present invention provides a negative electrode for a non-aqueous electrolyte secondary battery, containing a plurality of negative electrode active materials including at least a silicon-based active material expressed by SiOx where 0.5?x?1.6 and a carbon-based active material, the silicon-based active material containing at least one of Li2SiO3 and Li4SiO4 therein, the silicon-based active material being coated with at least one of Li2CO3, LiF, and carbon, the silicon-based active material being included in an amount of 6 mass % or more with respect to a total amount of the negative electrode active materials. There can be provided a negative electrode that enables a lithium-ion secondary battery using this negative electrode to have improved cycle performance and initial charge and discharge performance and a lithium-ion secondary battery using this negative electrode.

Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing silicon compound expressed by SiOx where 0.5?x?1.6, silicon compound containing lithium compound, wherein test cell combining electrode containing negative electrode active material particles and counter electrode composed of metallic lithium exhibits a first efficiency of 82% or more, and charge capacity of test cell at voltage of electrode of 0.17V ranges from 7% to 30% of first discharge capacity of test cell when test cell is successively subjected to constant current charge until voltage of electrode reaches 0.0V, constant voltage charge until a current is decreased to one tenth of a current at the constant current charge, and a constant current discharge until the voltage of the electrode reaches 1.2V. This negative electrode active material can increase the battery capacity and improve the cycle performance.

Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5?x?1.6, the negative electrode active material particles at least partially coated with a carbon coating, the carbon coating exhibiting a specific surface area ranging from 5 m2/g to 1000 m2/g, the specific surface area being measured by a multipoint BET method after the carbon coating is separated from the negative electrode active material particles, the carbon coating exhibiting a compression resistivity ranging from 1.0×10?3 ?·cm to 1.0 ?·cm when the carbon coating is compressed so as to have a density of 1.0 g/cm3, the compression resistivity being measured after the carbon coating is separated from the negative electrode active material particles. This negative electrode active material can increase the battery capacity and improve the cycle performance and battery initial efficiency.

Abstract: The present invention is a negative electrode active material for a negative electrode active material layer of a lithium ion secondary battery, wherein: the negative electrode active material comprises silicon-based material consisting of SiOx (0.5?x?1.6); and the negative electrode active material has two or more peaks in a region of a bond energy ranging from 520 eV to 537 eV in an O 1s peak shape given in an X-ray photoelectron spectroscopy. As a result, it is possible to provide a negative electrode active material in which a battery capacity can be increased and cycle characteristics and initial charge/discharge characteristics can be improved when used as a negative electrode active material for a lithium ion secondary battery.