Abstract: An electrode active material for capacitors contains a porous carbon material. The porous carbon material has a BET specific surface area of 800 m2/g or more. An X-ray diffraction image of the porous carbon material with CuK? rays has a peak Pk at 2?=40° to 50°, and the peak Pk includes a component of a peak Pd111 attributed to a (111) plane of diamond crystals. When the X-ray diffraction image has a peak PG002 attributed to a (002) plane of graphite, a ratio of an intensity IG002 of PG002 to an intensity Ik of Pk (IG002/Ik) is 3.0 or less.

Abstract: Provided is a conductive resin molded body that has a three-dimensional network structure and is suitable for producing an aluminum porous body in which the water adsorption amount is small. The conductive resin molded body includes a resin molded body having a three-dimensional network structure and a conductive layer at least containing carbon black and carboxymethylcellulose on the surface of the skeleton of the resin molded body. The conductive layer is preferably formed by applying a carbon coating material at least containing carbon black, carboxymethylcellulose, and water to the surface of the skeleton of the resin molded body and subsequently drying the carbon coating material; and the carbon coating material preferably has a viscosity of 100 mPa·s or more and 600 mPa·s or less.

Abstract: A positive electrode for a lithium ion capacitor includes a positive electrode current collector with a three-dimensional network structure and a positive electrode mixture which contains a positive electrode active material and with which the positive electrode current collector is filled. The positive electrode current collector contains aluminum or an aluminum alloy. The positive electrode active material contains a porous carbon material that reversibly carries at least an anion. The positive electrode has an active material density of 350 to 1000 mg/cm3.

Abstract: An alkali metal ion capacitor includes a positive electrode; a negative electrode; a separator disposed between the positive electrode and the negative electrode; and an electrolyte containing alkali metal ions and anions, wherein the separator has a thickness of 10 ?m or less, the positive electrode includes a positive electrode current collector having a three-dimensional mesh-like metal skeleton and a positive electrode active material held on the positive electrode current collector, the negative electrode includes a negative electrode current collector having a three-dimensional mesh-like metal skeleton and a negative electrode active material held on the negative electrode current collector, the positive electrode has a maximum surface roughness Rz1 of 35 ?m or less and the negative electrode has a maximum surface roughness Rz2 of 35 ?m or less.

Abstract: It is an object of the present invention to provide a method for producing an electrode for an electrochemical element, which can easily adjust a capacity and can produce the electrochemical element at low cost. The method for producing an electrode for an electrochemical element of the present invention includes a thickness adjustment step of compressing an aluminum porous body having continuous pores to adjust the thickness of the aluminum porous body to a predetermined thickness, and a filling step of filling the aluminum porous body, the thickness of which is adjusted, with an active material.

Abstract: A capacitor includes an electrode group that includes a positive electrode including a positive electrode active material and a porous positive electrode current collector that holds the positive electrode active material, a negative electrode including a negative electrode active material and a porous negative electrode current collector that holds the negative electrode active material, and a first separator disposed between the positive electrode and the negative electrode; a nonaqueous electrolyte having alkali metal ion conductivity; a case that hermetically seals the electrode group and the nonaqueous electrolyte; an alkali metal supply source disposed between the electrode group and the case; and a second separator disposed between the electrode group and the alkali metal supply source. At least the negative electrode contains an alkali metal introduced by pre-doping using the alkali metal supply source. The second separator has a thickness of 5 to 60 ?m.

Abstract: It is an object of the present invention to provide a current collector including an aluminum porous body suitable for an electrode for a nonaqueous electrolyte battery and an electrode for a capacitor electrode, and an electrode using the current collector. In the three-dimensional network aluminum porous body for a current collector of the present invention, when a sheet-shaped three-dimensional aluminum porous body is divided in the width direction into a central region and two end regions with the central region situated therebetween, the weight per unit area of aluminum in the aluminum porous body at the two end regions is larger than the weight per unit area of aluminum in the aluminum porous body at the central region.

Abstract: An alkali metal ion capacitor includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a separator disposed between the positive electrode and the negative electrode, and an electrolyte. The electrolyte contains an alkali metal salt and an ionic liquid. The alkali metal salt is a salt of a first alkali metal ion serving as a first cation and a first anion. The negative electrode active material is pre-doped with a second alkali metal ion until the potential of the negative electrode reaches 0.05 V or less with respect to a second alkali metal. The alkali metal ion capacitor has an upper-limit voltage for charging and discharging of more than 3.8 V.

Abstract: A metal tube including a metal substrate and a metal porous body disposed on at least part of a surface of the metal substrate. The metal tube is obtained by the steps of joining the metal porous body to at least part of the surface of the metal substrate in flat plate form; and forming the metal substrate with the metal porous body joined thereto into a tubular shape.

Abstract: A drum electrode, which is used for a device configured to plate a surface of a long base material having electrical conductivity with a metal, includes a power feeding layer, an insulating layer which covers a surface of the power feeding layer, and a projecting electrode which projects from the surface of the insulating layer and is electrically connected to the power feeding layer, in which the projecting electrode is provided linearly in the circumferential direction of the drum electrode.

Abstract: It is an object of the present invention to provide a current collector including an aluminum porous body suitable for an electrode for a nonaqueous electrolyte battery and an electrode for a capacitor electrode, and an electrode using the current collector. In the three-dimensional network aluminum porous body for a current collector of the present invention, when a sheet-shaped three-dimensional aluminum porous body is divided in the width direction into a central region and two end regions with the central region situated therebetween, the weight per unit area of aluminum in the aluminum porous body at the two end regions is larger than the weight per unit area of aluminum in the aluminum porous body at the central region.

Abstract: An object of the present invention is to inexpensively provide a porous metal body which is usable for an electrode of a fuel cell or the like and which has excellent corrosion resistance. There is provided a porous metal body for a fuel cell, which is a sheet-shaped porous metal body, including at least nickel, tin, and chromium, in which the chromium concentration of at least one surface of the porous metal body is 3% to 50% by mass. In the porous metal body, preferably, the chromium concentration of one surface is higher than the chromium concentration of another surface.

Abstract: A lithium battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte, wherein the positive electrode includes a metal positive electrode current collector having a three-dimensional network hollow skeleton and a positive electrode mixture, which is filled in the positive electrode current collector and which contains a positive electrode active material, the thickness of the positive electrode is 0.2 to 5 mm, the nonaqueous electrolyte contains an ionic liquid and a lithium salt, the ionic liquid is a molten salt of a cation and an anion, and the concentration of the lithium salt in the nonaqueous electrolyte is 0.8 to 6.2 mol/L.

Abstract: Provided is a porous metal body containing at least nickel, tin, and chromium. An example of a method of producing such a porous metal body is a method including a conductive-coating-layer formation step of forming a conductive coating layer containing chromium on a surface of a porous base formed of a resin material; a metal-layer formation step of forming a nickel layer and a tin layer in any order on a surface of the conductive coating layer; a removal step of removing the porous base; and a diffusion step of, by a heat treatment, causing interdiffusion of metal atoms between the nickel layer and the tin layer and diffusing chromium contained in the conductive coating layer into the nickel layer and the tin layer.

Abstract: Provided is a porous metal body having superior corrosion resistance to conventional metal porous bodies composed of nickel-tin binary alloys and conventional metal porous bodies composed of nickel-chromium binary alloys. The porous metal body has a three-dimensional network skeleton and contains at least nickel, tin, and chromium. The concentration of chromium contained in the porous metal body is highest at the surface of the skeleton of the porous metal body and decreases toward the inner side of the skeleton. In one embodiment, the chromium concentration at the surface of the skeleton of the porous metal body is more preferably 3% by mass or more and 70% by mass or less.

Abstract: It is an object of the present invention to provide an electrochemical element which has a high capacity and is low in cost. The electrochemical element of the present invention is an electrochemical element including an electrode for an electrochemical element, wherein a current collector of positive electrode and/or a current collector of negative electrode is a metal porous body having continuous pores and a mixture containing an active material is filled into the continuous pores.

Abstract: An electrode for a power storage device includes carbon nanotubes, graphene, an ionic liquid, and a three-dimensional network metal porous body which holds the carbon nanotubes, the graphene, and the ionic liquid in pore portions, wherein a ratio of a total amount of the carbon nanotubes and the graphene to an amount of the ionic liquid is more than or equal to 10% by mass and less than or equal to 90% by mass, and a mass ratio between the carbon nanotubes and the graphene is within a range of 3:7 to 7:3.

Abstract: Provided is a capacitor in which, even in the case of a high maximum charging voltage, decomposition of the electrolyte can be suppressed and charging and discharging can be performed with stability. The capacitor includes a positive electrode containing a positive-electrode active material, a negative electrode containing a negative-electrode active material, a separator disposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive-electrode active material contains a porous carbon material, in a volume-based pore size distribution of the porous carbon material, a cumulative volume of pores having a pore size of 1 nm or less accounts for 85% or more of a total pore volume, the porous carbon material has a crystallite size of 1 to 10 nm, the porous carbon material contains an oxygen-containing functional group, and a content of the oxygen-containing functional group is 3.3 mol % or less.

Abstract: A lithium ion capacitor includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a separator disposed between the positive electrode and the negative electrode, and a lithium ion conductive electrolyte. The electrolyte contains a lithium salt and an ionic liquid. The lithium salt is a salt of a lithium ion serving as a first cation and a first anion, and the ionic liquid is a molten salt of a second cation and a second anion. The first anion and the second anion are the same.

Abstract: A production method for an aluminum porous body includes a step of producing a resin structure by forming an aluminum film on a surface of a resin base having a three-dimensional network structure by molten salt electrolytic plating, a step of removing moisture from the resin structure, and a step of removing the base by heat-treating the resin structure from which moisture has been removed. In the step of removing moisture from the resin structure, the resin structure is preferably heat-treated at a temperature of 50° C. or higher and 300° C. or lower. In the step of removing the base, the resin structure is preferably heat-treated at a temperature equal to or higher than 370° C. and lower than the melting point of aluminum.