Abstract: This negative electrode for a lithium ion secondary battery is characterized by comprising a negative electrode mixture layer containing a carbon-based negative electrode active material, a Si-based negative electrode active material, and carbon nanotubes, wherein when 100 is the ratio at which the carbon nanotubes coat the surface of the Si-based negative electrode active material, the ratio at which the carbon nanotubes coat the surface of the carbon-based negative electrode active material is at least 20 but no higher than 50.

Abstract: An electrostatic separation method includes: applying voltage between a lower electrode at a bottom portion of or in the raw material layer and an upper electrode above the raw material layer, generating an electric field between electrodes; fluidizing the raw material layer and bringing conductive particles and the lower electrode into contact in the raw material layer charging only the conductive particles wherein their polarity becomes the same as the lower electrode; generating polarity, the same as the upper electrode, by dielectric polarization on a conveyor belt downward-facing conveyance surface passing through a capture region above the raw material layer and under the upper electrode, the conveyance surface including a nonconductor; separates charged conductive particles from the raw material layer surface by electrostatic force and adhering conductive particles to the conveyor belt conveyance surface; and separating and collecting the particles from the conveyance surface that moved outside the ele

Abstract: Provided is a carbon nanotube dispersion liquid for an electrode slurry such that it is possible to inhibit a decrease in a charge-discharge cycle characteristic. A carbon nanotube dispersion liquid for an electrode slurry according to one aspect of the present disclosure includes carbon nanotubes having a diameter of 0.4 to 2 nm, a dispersant, and a dispersion medium. In a Raman spectroscopy spectrum, the carbon nanotubes have a G/D ratio, which is the ratio of the peak intensities of the G-band (1560 to 1600 cm?1) and the D-band (1310 to 1350 cm?1), within the range of 50 to 200, and in a volume-based particle size distribution via a laser diffraction method, the carbon nanotubes have 3 to 5 peaks, and if the peaks are, from the small particle diameter side, P1, P2, . . . , Pn, the greatest frequency peak is in the range pf P2 to Pn-1.

Abstract: A positive electrode includes at least a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is disposed on a surface of the positive electrode current collector. The positive electrode current collector includes an aluminum foil and an aluminum hydrated oxide film. The aluminum hydrated oxide film covers a surface of the aluminum foil. The aluminum hydrated oxide film has a thickness not smaller than 50 nm and not greater than 500 nm. The aluminum hydrated oxide film contains a plurality of types of aluminum hydrated oxides. The ratio of boehmite to the plurality of types of aluminum hydrated oxides is not lower than 20 mol % and not higher than 80 mol %.

Abstract: Provided is an electrode slurry carbon nanotube liquid dispersion which improves charge/discharge cycle characteristics. An electrode slurry carbon nanotube liquid dispersion which is one aspect of the present disclosure and contains 0.1-1.5 mass % of carbon nanotubes, a dispersion medium, and carboxymethyl cellulose, the viscosity of which at 100 s?1 in a 3% aqueous solution is 2-200 mPa·s, wherein: the carboxymethyl cellulose content constitutes 50-250 parts by mass relative to 100 parts by mass of carbon nanotubes; the viscosity at 100 s?1 is 50-200 mPa·s in a state in which the carbon nanotubes are dispersed; and the particle distribution according to the laser diffraction method exhibits a D10 of 0.3-1.0 ?m, a D50 of 3-10 ?m and a D90 of 60 ?m or less in a state in which the carbon nanotubes are dispersed.

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, which is an example of embodiments, comprises a negative electrode core body and a negative electrode mixture layer provided on the surface of the negative electrode core body. The negative electrode mixture layer includes graphite and fibrous carbon. The BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region. In addition, the average length of the fibrous carbon included in the second region is longer than the average length of the fibrous carbon included in the first region.

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, which is an example of embodiments, comprises a negative electrode core body and a negative electrode mixture layer provided on the surface of the negative electrode core body. The negative electrode mixture layer includes graphite and fibrous carbon. The BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region. In addition, the average length of the fibrous carbon included in the first region is longer than the average length of the fibrous carbon included in the second region.

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery comprises a negative electrode core body and a negative electrode mixture layer provided. When the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode mixture layer is defined as a first region and the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode core body is defined as a second region, the BET specific surface area of the graphite included in the first region is smaller than that of the graphite included in the second region. The first region includes the multiwalled fibrous carbon more than the single wall fibrous carbon in terms of mass and the second region includes the single wall fibrous carbon more than the multiwalled fibrous carbon in terms of mass.

Abstract: This positive electrode for nonaqueous electrolyte secondary batteries is provided with a positive electrode core body and a positive electrode mixture layer formed on the surface of the positive electrode core body. The positive electrode mixture layer contains a positive electrode active material mainly composed of a lithium transition metal composite oxide which contains 70% by mole or more of Ni relative to the total number of moles of the metal elements excluding Li. The positive electrode core body has a thermal conductivity X of from 50 to 155 W/m·K (25° C.). The upper limit Y1 and the lower limit Y2 of the median value Y in the circularity distribution of the lithium transition metal composite oxide relative to the thermal conductivity X of the core body respectively satisfy the conditions of formula (1) and formula (2) described below. Formula (1): Y1=0.9322(X?0.987) Formula (2): Y2=0.1613(X?0.746)?0.0005.

Abstract: A positive electrode includes at least a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is formed on a surface of the positive electrode current collector. The positive electrode current collector includes an aluminum foil and a porous film. The porous film covers a surface of the aluminum foil. The porous film contains at least aluminum oxide. The porous film has a thickness not smaller than 10 nm and not greater than 800 nm. The porous film has a dynamic hardness not lower than 5 and not higher than 200.

Abstract: A nonaqueous battery includes a positive electrode and a negative electrode. At least one of the positive electrode and the negative electrode includes a current collector, an intermediate layer, and an active material layer. The intermediate layer is interposed between the current collector and the active material layer and includes graphite particles and insulating particles. In a cross section of the intermediate layer in a thickness direction, a major axis diameter of the graphite particles is equal to or greater than the thickness of the intermediate layer. In X-ray diffraction measurement of the intermediate layer by an out-of-plane method, a ratio of an intensity of an 110 diffraction line of a graphite crystal to an intensity of a 002 diffraction line of the graphite crystal is 0.0011 or more.

Abstract: A positive electrode includes at least a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is formed on a surface of the positive electrode current collector. The positive electrode current collector includes an aluminum foil and a porous film. The porous film covers a surface of the aluminum foil. The porous film contains at least aluminum oxide. The porous film has a thickness not smaller than 10 nm and not greater than 800 nm. The porous film has a dynamic hardness not lower than 5 and not higher than 200.

Abstract: A positive electrode includes at least a positive electrode current collector, a conductive material, and a positive electrode active material. The positive electrode active material is disposed on a surface of the positive electrode current collector. The positive electrode current collector includes an aluminum foil and an aluminum oxide hydrate film. The aluminum oxide hydrate film covers a surface of the aluminum foil. The aluminum oxide hydrate film has a thickness not smaller than 10 nm and not greater than 500 nm. The aluminum oxide hydrate film has a porosity not lower than 10% and not higher than 50%. At least part of the conductive material is disposed within pores in the aluminum oxide hydrate film.

Abstract: This nonaqueous electrolyte secondary battery positive electrode comprises a positive electrode collector which is mainly composed of Ti, and a positive electrode active material layer which is disposed on the positive electrode collector, wherein the positive electrode active material layer includes a positive electrode active material and a binder and has a density of 3 g/cc or more, the positive electrode active material has an average particle size in a range of 2 to 20 ?m, the positive electrode collector has a thickness in a range of 1 to 8 ?m, and the content of the binder in the positive electrode active material layer satisfies the formula, y=0.006x2+0.0262x+a (y is the content (mass %) of the binder, x is the thickness of the positive electrode collector, and a is a real number from 0.3 to 2.2).

Abstract: A battery includes an electrode plate group. The electrode plate group includes electrode plates and a separator. The electrode plate group is obtained by laminating a plurality of electrode plates. The separator is disposed between the electrode plates. A surface of at least one of the electrode plates is a particle layer. A surface of the separator is a nonwoven fabric layer. The particle layer includes fibrous particles. The particle layer and the nonwoven fabric layer are in contact with each other.

Abstract: A railway direct-current system according to the present invention is provided with: a feeding line that is connected to a plurality of electric power substations arranged along a railway; and a trolley line that is connected to the feeding line via feeding branch lines at an arbitrarily defined interval, wherein a superconductive feeding cable is connected to somewhere midway in each of railroad lines extending from the substations to the trolley line via the feeding lines, so as to be parallel with the railroad line.

Abstract: A positive electrode includes at least a positive electrode current collector and a positive electrode active material layer. The positive electrode current collector includes an aluminum foil and an aluminum hydrated oxide film. The aluminum hydrated oxide film covers a surface of the aluminum foil. The positive electrode active material layer is formed on a surface of the aluminum hydrated oxide film. The aluminum hydrated oxide film has a thickness not smaller than 50 nm and not greater than 1000 nm. The aluminum hydrated oxide film contains at least one selected from the group consisting of phosphorus, fluorine, and sulfur.

Abstract: A non-aqueous electrolyte secondary battery includes at least a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive electrode current collector, an intermediate layer, and a positive electrode active material layer. The intermediate layer is interposed between the positive electrode current collector and the positive electrode active material layer. The intermediate layer contains at least carboxymethylcellulose, a conductive material, and an inorganic filler.

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery comprises a negative electrode core body and a negative electrode mixture layer provided. When the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode mixture layer is defined as a first region and the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode core body is defined as a second region, the BET specific surface area of the graphite included in the first region is smaller than that of the graphite included in the second region. The first region includes the multiwalled fibrous carbon more than the single wall fibrous carbon in terms of mass and the second region includes the single wall fibrous carbon more than the multiwalled fibrous carbon in terms of mass.

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery comprises a negative electrode core body, and a negative electrode mixture layer. When the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode mixture layer on the side opposite to the negative electrode core body is defined as a first region and the range of 40% of the thickness of the negative electrode mixture layer from the interface between the negative electrode mixture layer and the negative electrode core body is defined as a second region, the BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region.