Abstract: The present disclosure provides a method for producing a microchannel device, which can form a channel that has high hydrophobicity, high solvent resistance as well, and also resistance to heat and damage, on demand with high accuracy, and produces the microchannel device at a low cost, while having high productivity. The method for producing a microchannel device includes: forming a channel pattern from a hydrophobic resin on a porous substrate by an electrophotographic method; melting the channel pattern by heat to allow the channel pattern to permeate into the porous substrate, thereby forming a channel in the inside of the porous substrate.

Abstract: A fuel cell separator is provided with an opening that functions as a manifold. A resin coating is formed within the peripheral area of the fuel cell separator, in a state where the power generation area is masked with a masking jig. Subsequently, the masking jig is removed, and a conductive coating is formed within the power generation area of the fuel cell separator, the peripheral area of which has been masked by the resin coating.

Abstract: A fuel cell separator is provided with an opening that functions as a manifold. A resin coating is formed within the peripheral area of the fuel cell separator, in a state where the power generation area is masked with a masking jig. Subsequently, the masking jig is removed, and a conductive coating is formed within the power generation area of the fuel cell separator, the peripheral area of which has been masked by the resin coating.

Abstract: A fuel cell separator is provided with an opening that functions as a manifold. A resin coating is formed within the peripheral area of the fuel cell separator, in a state where the power generation area is masked with a masking jig. The resin coating is formed so that the separator substrate is exposed within at least a portion of the peripheral area. Subsequently, the masking jig is removed, and a conductive coating is formed within the power generation area of the fuel cell separator, the peripheral area of which has been masked by the resin coating. The conductive coating is formed by causing electricity to flow through the portion of the peripheral area where the separator substrate is exposed.

Abstract: A fuel-cell stack is provided wherein an insulating resin layer having good electrical insulation characteristics is inserted between a terminal and end plate, so that an insulating plate is discarded so as to make the same more lightweight and downsized. It comprises a battery-cell group wherein a plurality of battery cells and separators are arranged; and terminal plates 1 and end plates 3 that are arranged on each end portion of the battery-cell group. The end plates 3 are formed as metal plate members having surfaces 31 opposing to the terminal plates 1. A polyimide film 35 is formed as an insulating resin layer at least on the opposing surface 31 of the end plate 3 for electrically insulating between the end plate 3 and terminal plate 1 by an electro-deposition coating method.

Abstract: For use in a fuel cell, constituted by plural cells, a separator that can reduce fluctuations in electromotive force across respective cells includes a recessed gas path. Depth fluctuations of the gas path can be reduced. It is formed easily even if the separator is formed of a hard material. The gas path having plural depths or gradation can be formed easily. An electrically conductive member, as a separator, and a processing electrode, having patterned electrode projections, are immersed in an electrolytic solution facing each other. Current is fed between the conductive member and electrode for electrolytic processing to dissolve the portion of the conductive member facing the projections, thus forming a gas path having a surface roughness Rz on this bottom surface not larger than 1 ?m.

Abstract: A method for producing a separator integrated with a gas flow channel of fuel cells efficiently at low costs without deteriorating processing accuracy and the like. A plane-facing electrode nozzle 30 is placed oppositely to the face to be processed, which is partially covered with a mask M, of base material B of a separator. While feeding electricity to the electrode nozzle 30 and the base material B of a separator, an electrolytic solution is injected and fed from the side of the electrode nozzle 30 to the face to be processed of the base material B from a direction that is almost perpendicular to the face. Thereby, the unmasked portion undergoes electrolytic etching with the electrolytic solution lying between the face to be processed and the electrode nozzle 30 to form recessed portions for making a gas flow channel.

Abstract: For use in a fuel cell, constituted by plural cells, a separator that can reduce fluctuations in electromotive force across respective cells. A method for producing a separator in which a recessed gas path is formed. Depth fluctuations of the gas path can be reduced. It is formed easily even if the separator is formed of a hard material. The gas path having plural depths or gradation can be formed easily. An electrically conductive member 3, as a separator, and a processing electrode 16, having patterned electrode projections 20, are immersed in an electrolytic solution facing each other. Current is fed between member 3 and electrode 16 for electrolytic processing to dissolve the portion of the member 3 facing projections 20, thus forming a gas path 30 having a surface roughness Rz on this bottom surface 30e not larger than 1 &mgr;m.

Abstract: A method for producing a separator in which a recessed gas path is formed. Depth fluctuations of the gas path can be reduced. The gas path having plural depths or gradation can be formed easily. An electrically conductive member 3, as a separator, and a processing electrode 16, having patterned electrode projections 20, are immersed in an electrolytic solution facing each other. Current is fed between member 3 and electrode 16 for electrolytic processing to dissolve the portion of the member 3 facing projections 20, thus forming a gas path 30 having a surface roughness Rz on this bottom surface 30e not larger than 1 &mgr;m.

Abstract: For use in a fuel cell, constituted by plural cells, a separator that can reduce fluctuations in electromotive force across respective cells. An electrically conductive member 3, as a separator, and a processing electrode 16, having patterned electrode projections 20, are immersed in an electrolytic solution facing each other. Current is fed between member 3 and electrode 16 for electrolytic processing to dissolve the portion of the member 3 facing projections 20, thus forming a gas path 30 having a surface roughness Rz on this bottom surface 30e not larger than 1 &mgr;m. Using the separator having the gas path with extremely smooth bottom surface, the gas flow in each cell proceeds in a reduced fluctuation to reduce fluctuations in the electromotive force.

Abstract: A fuel cell and a separator for same meritorious in reducing the weight and improving resistance against corrosion. In a fuel cell having a separator 2, the separator 2 includes an aluminum-based substrate 6, an intermediate plating layer layered on the aluminum-based substrate 6 and a noble metal layer 72 layered on the intermediate plating layer. The intermediate plating layer can be made up of a zinc-substitution plating layer 70 and a copper plating layer 71. The noble metal layer 72 can be a silver plating layer.

Abstract: To provide a method capable of producing a separator integrated with a gas flow channel of fuel cells efficiently at low costs without deteriorating processing accuracy and the like.

Abstract: A fuel cell has a plurality of unit cells each including electrodes sandwiching an electrolyte membrane in-between, and a plurality of separators (3) each arranged between the unit cells. Each separator (3) has a plurality of contact lugs (65, 75) facing the electrodes and contacting the electrodes at pre-set contact widths and a plurality of fluid ducts (6a, 7a) each having a space between neighboring ones of the contact lugs (65, 75) as a duct width. The contact width of the contact lugs 65 (75) on a side closer to a fluid outlet is set smaller than that of the contact lugs 65 (75) on a side closer to a fluid inlet. Diffusion of an active material in an active material containing fluid into the inside of electrodes on a downstream side of a fluid duct, that is on a side closer to a fluid outlet, is facilitated.

Abstract: A silicone resin-metal composite comprising a thin metal plate and a silicone resin layer formed on at least one side of the thin metal plate by injection molding, wherein a silicone resin layer has a thickness of from 0.05 mm to 1.0 mm and a hardness within a range of from 20 to 70 (JIS K6301 spring type hardness test A).

Abstract: The invention provides a method for the preparation of a calcium carbonate powder of which the particles have a platelet-like particulate configuration and which is useful as a pigment or filler in various products with superiority to kaolin clays and mica powders. The method is a two-step carbonation method of a milk of lime of which the first step is performed by blowing carbon dioxide into the milk of lime until 10 to 70% of the calcium hydroxide is carbonated and the second step is performed by admixing the thus partially carbonated milk of lime with an aqueous carbonating solution containing an alkali metal carbonate or ammonium carbonate and an alkali metal hydroxide or ammonium hydroxide in specified concentrations to complete the carbonation of the calcium hydroxide.