Abstract: An electric double layer capacitor including a positive electrode assembly and a negative electrode assembly, each electrode assembly having a porous layer including a carbonaceous powder and a fluorine-containing polymer formed on at least one side of an aluminum foil current collector, the positive electrode and the negative electrode being disposed so that the porous layer of the positive electrode assembly and the porous layer of the negative electrode assembly face each other with a separator interposed therebetween to form an element, the element being impregnated with a non-aqueous electrolyte and accommodated in a sealed container, wherein the thickness of the porous layer is from 80 to 200 &mgr;m, the thickness of the aluminum foil current collector is from 20 to 80 &mgr;m, the thickness of the separator is from 30 to 170 &mgr;m, and the density of the porous layer is from 0.50 to 0.

Abstract: A process for producing an electrode assembly for an electric double layer capacitor having an electrode layer comprising a carbonaceous material and a first binder, formed on at least one side of a metal current collector foil, which comprises the following steps A to D: Step A: a step of coating an electroconductive adhesive comprising an electroconductive powder, a second binder and a solvent, on at least one side of a metal current collector foil; Step B: a step of drying the metal current collector foil coated with the electroconductive adhesive to remove at least a part of the solvent and to form an electroconductive bonding layer; Step C: a step of preparing a formed product of sheet shape comprising the carbonaceous material and the first binder; and Step D: a step of placing the formed product of sheet shape on the electroconductive bonding layer to form a laminate comprising the metal current collector foil and the formed product of sheet shape, and rolling the laminate to reduce the thickness o

Abstract: A polytetrafluoroethylene agglomerated product obtained from a polytetrafluoroethylene powder and a coke powder, wherein the polytetrafluoroethylene powder contains at least 8.3 mass % of a polytetrafluoroethylene fine powder having a particle diameter of from 0.1 to 9.5 &mgr;m, and the mass ratio of the polytetrafluoroethylene powder/the coke powder is 95-60/5-40.

Abstract: A process for producing an electrode for an electric double layer capacitor, which includes extruding a mixture including a carbonaceous material, a polytetrafluoroethylene and a processing aid by paste extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.

Abstract: A polytetrafluoroethylene agglomerated product obtained from a polytetrafluoroethylene powder and a coke powder, wherein the polytetrafluoroethylene powder contains at least 8.3 mass % of a polytetrafluoroethylene fine powder having a particle diameter of from 0.1 to 9.5 &mgr;&mgr;m, and the mass ratio of the polytetrafluoroethylene powder/the coke powder is 95-60/5-40.

Abstract: An electric double layer capacitor comprising a positive electrode assembly and a negative electrode assembly, each electrode assembly having a porous layer comprising a carbonaceous powder and a fluorine-containing polymer formed on at least one side of an aluminum foil current collector, the positive electrode and the negative electrode being disposed so that the porous layer of the positive electrode assembly and the porous layer of the negative electrode assembly face each other with a separator interposed therebetween to form an element, the element being impregnated with a non-aqueous electrolyte and accommodated in a sealed container, wherein the thickness of the porous layer is from 80 to 200 &mgr;m, the thickness of the aluminum foil current collector is from 20 to 80 &mgr;m, the thickness of the separator is from 30 to 170 &mgr;m, and the density of the porous layer is from 0.50 to 0.80 g/cm3.

Abstract: A process for producing an electrode assembly for an electric double layer capacitor having an electrode layer comprising a carbonaceous material and a first binder, formed on at least one side of a metal current collector foil, which comprises the following steps A to D:

Abstract: A process for producing an electrode for an electric double layer capacitor, which comprises extruding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid by paste extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.

Abstract: A process for producing an electrode for an electric double layer capacitor, which comprises extruding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid by paste extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.

Abstract: An electric double layer capacitor including a positive electrode assembly and a negative electrode assembly, each electrode assembly having a porous layer including a carbonaceous powder and a fluorine-containing polymer formed on at least one side of an aluminum foil current collector, the positive electrode and the negative electrode being disposed so that the porous layer of the positive electrode assembly and the porous layer of the negative electrode assembly face each other with a separator interposed therebetween to form an element, the element being impregnated with a non-aqueous electrolyte and accommodated in a sealed container, wherein the thickness of the porous layer is from 80 to 200 &mgr;m, the thickness of the aluminum foil current collector is from 20 to 80 &mgr;m, the thickness of the separator is from 30 to 170 &mgr;m, and the density of the porous layer is from 0.50 to 0.80 g/cm3.

Abstract: An electrode for an electric double layer capacitor, which is a sheet electrode comprising a carbonaceous material and a polytetrafluoroethylene and having a K value_which is calculated by formula 1 from X-ray diffraction peak intensities measured by means of CuK&agr;-radiation of at most 20: K=IPTFE/(ICARBON×(CPTFE/CCARBON)) where IPTFE is the X-ray diffraction peak intensity of the polytetrafluoroethylene in the vicinity of 2&thgr;=18°, ICARBON is the X-ray diffraction peak intensity of the carbonaceous material in the vicinity of 2&thgr;=43°, CPTFE is the concentration by weight of the polytetrafluoroethylene in the electrode, and CCARBON is the concentration by weight of the carbonaceous material in the electrode.

Abstract: A process for producing an electrode for an electric double layer capacitor, which comprises extruding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid by screw extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.

Abstract: A process for producing an electrode for an electric double layer capacitor, which comprises extruding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid by screw extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.

Abstract: A process for producing an electrode for an electric double layer capacitor, which comprises extruding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid by paste extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.

Abstract: A method for molding a filler-containing polytetrafluoroethylene, which comprises adding a surfactant-containing aqueous medium to a filler-containing polytetrafluoroethylene, followed by extrusion molding.

Abstract: An ion exchange membrane electrolytic cell comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane; an improvement characterized in that a gas and liquid permeable porous non-electrode layer is bonded to at least one of surfaces of said ion exchange membrane and said porous non-electrode layer is formed by coating electric non-conductive or conductive particles on the surface of a support to form a thin layer, transferring said thin layer onto the surface of said membrane and bonding said thin layer to said membrane by the application of heat and pressure.