Abstract: Provided are a carbon dioxide separator and method of use therefor for separating carbon dioxide gas from a mixed gas containing oxygen and carbon dioxide gases, said carbon dioxide separator comprising: a carbon dioxide separating stack having in sequence an anode electrode, an anion-exchange polymer electrolyte membrane and a cathode electrode; a reducing agent supply chamber for supplying a reducing agent to the anode electrode, said reducing agent supply chamber disposed on the outer surface of the anode electrode and comprising a space in which at least a part of the anode electrode side is exposed; and a mixed gas supply chamber for supplying the mixed gas to the cathode electrode, said mixed gas supply chamber disposed on an outer surface of the cathode electrode and comprising a space in which at least a part of the cathode electrode side is exposed. The anode and cathode electrodes are electrically connected.

Abstract: The present invention provides a solar-cell-integrated gas production device that can generate a first gas and a second gas by utilizing an electromotive force of a solar cell, and that can supply power to an external circuit by utilizing the same solar cell.

Abstract: An anion-exchange-membrane type of fuel-cell-system includes: a fuel cell part; and a carbon dioxide eliminating part, wherein the fuel cell part comprises a fuel electrode, an air electrode, an anion-exchange type of solid polymer electrolyte membrane sandwiched between the fuel electrode and the air electrode, a fuel channel that supplies a fuel gas to the fuel electrode, and an air channel that supplies air or an oxygen gas to the air electrode, and the carbon dioxide eliminating part is configured to eliminate carbon dioxide which is mixed in the fuel gas when the fuel gas flows through the fuel channel, and to allow the fuel gas to flow again into the fuel channel after eliminating the carbon dioxide.

Abstract: Provided is an alkaline fuel cell, including: a membrane electrode assembly including an anion conductive electrolyte membrane, an anode electrode stacked on a first surface of the anion conductive electrolyte membrane, and a cathode electrode stacked on a second surface opposite to the first surface of the anion conductive electrolyte membrane; a first separator stacked on the anode electrode, at least including a fuel receiving portion for receiving a fuel; a second separator stacked on the cathode electrode, at least including an oxidant receiving portion for receiving an oxidant; and an alkaline aqueous solution supply portion for bringing an alkaline aqueous solution into contact with only the anion conductive electrolyte membrane of the membrane electrode assembly.

Abstract: There is provided a hydrogen production device which is high in the light use efficiency and can produce hydrogen with high efficiency without decreasing the hydrogen generation rate.

Abstract: A redox flow battery comprising an electrode cell including a negative electrode cell, a positive electrode cell and a separator for separating them, in which at least one of the negative electrode cell and the positive electrode cell includes a slurry type electrode solution, a porous current collector and a casing; a tank for storing the slurry type electrode solution; and a pipe for circulating the slurry type electrode solution between the tank and the electrode cell.

Abstract: The present invention provides an electrode for generation of hydrogen comprising: a conductive substrate; a catalytic layer formed on the conductive substrate and containing at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh; and a hydrogen adsorption layer formed on the catalytic layer. The present invention also provides an electrode for generation of hydrogen comprising: a conductive substrate, a catalytic layer formed on the conductive substrate and containing: at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh and/or at least one oxide of said platinum group metals; and at least one metal selected from the group consisting of lanthanum series metals, valve metals, iron series metals and silver and/or at least one oxide of said metals; and a hydrogen adsorption layer formed on the catalytic layer.

Abstract: There is provided a membrane electrode assembly comprising an electrolyte membrane, an anode electrode stacked on one surface of the electrolyte membrane, a cathode electrode stacked on the other surface of the electrolyte membrane, and a channel plate arranged on a side of the anode electrode, said side being the reverse side of the electrolyte membrane side. The membrane electrode assembly also comprises an insulating sealing layer which covers at least the lateral surfaces of the anode electrode, the electrolyte membrane and the channel plate, and contains a water-swellable particle.

Abstract: There is provided a hydrogen production device high in light use efficiency and capable of producing hydrogen with high efficiency. The hydrogen production device according to the present invention includes a photoelectric conversion part having a light acceptance surface and a back surface, a first gas generation part provided on the back surface, and a second gas generation part provided on the back surface, in which one of the first gas generation part and the second gas generation part is a hydrogen generation part to generate H2 from an electrolytic solution, another one thereof is an oxygen generation part to generate O2 from the electrolytic solution, the first gas generation part is electrically connected to the back surface, and the second gas generation part is electrically connected to the light acceptance surface via a first conductive part.

Abstract: The present invention relates to a small fuel cell and a small fuel cell stack each allowing for improved output. Conventionally, in a direct methanol fuel cell, carbon dioxide gas produced at an anode electrode side is exhausted together with a methanol aqueous solution. From the methanol aqueous solution, the carbon dioxide gas is separated, and then the methanol aqueous solution is reused as fuel. In this case, a liquid-gas separation device needs to be provided additionally, which results in a large fuel cell with an increased weight, disadvantageously. The present invention is made to solve such a problem by providing a fuel cell including a first unit cell having a cathode electrode, an electrolyte membrane, an anode electrode, and an anode collector layer in this order; and one or more spacers arranged on the anode collector layer.

Abstract: There is provided a fuel cell including a membrane electrode assembly having a cathode electrode, an electrolyte membrane, and an anode electrode in this order, and an anode collector layer. The anode collector layer includes a pair of first walls provided along two opposite sides. The membrane electrode assembly is fitted between the first walls such that the anode electrode faces the anode collector layer. A fuel cell layer employing the fuel cells is also provided. Preferably, the fuel cell further includes a pair of second walls formed on the pair of first walls.

Abstract: The present invention provides an electrode for generation of hydrogen comprising: a conductive substrate; a catalytic layer formed on the conductive substrate and containing at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh; and a hydrogen adsorption layer formed on the catalytic layer. The present invention also provides an electrode for generation of hydrogen comprising: a conductive substrate, a catalytic layer formed on the conductive substrate and containing: at least one platinum group metal selected from the group consisting of Pt, Ir, Ru, Pd and Rh and/or at least one oxide of said platinum group metals; and at least one metal selected from the group consisting of lanthanum series metals, valve metals, iron series metals and silver and/or at least one oxide of said metals; and a hydrogen adsorption layer formed on the catalytic layer.