Abstract: Provided is a laminate battery in which a short circuit between a negative electrode active material and a positive electrode due to expansion of the negative electrode active material during discharging is prevented. A laminate battery includes a battery case that serves as an outer case. The laminate battery includes an inner case within a battery case 11, and the inner case is formed of a positive electrode storage case and a separator. An inside of the inner case serves as a positive electrode storage portion that stores a positive electrode. An outside of the inner case serves as a negative electrode storage portion that stores a negative electrode. The negative electrode uses a particulate negative electrode active material (e.g., zinc or zinc oxide).

Abstract: An active material layer of a metal negative electrode includes: active material particles including a negative active material; and an additive having particles larger in average particle size than the active material particles. The metal negative electrode is immersed in an alkaline aqueous solution, and the additive is eluted into the alkaline aqueous solution. In a place where the additive is previously found, a space is defined in the active material layer.

Abstract: A metal-air battery includes a metal negative electrode (12), an oxygen-generating electrode placed on a surface of the metal negative electrode, and an air electrode placed on another surface of the metal negative electrode. The metal negative electrode includes at least a negative electrode active material layer facing the oxygen-generating electrode. A first separator placed in contact with the negative electrode active material layer is placed between the negative electrode active material layer and the oxygen-generating electrode.

Abstract: A method for producing an air electrode includes a kneading step of kneading an oxygen reduction catalyst, a conductive auxiliary agent, and a water-repellent resin (binder) in a water solvent; and a rolling step of rolling with a roller the kneaded product produced in the kneading step. The rolling step includes rolling the kneaded product with the roller several times in many directions (at least two or more different rolling directions). In the formed air electrode, the water-repellent resin is fiberized in the air electrode, and the fibers thereof are oriented in many directions to form a netlike shape.

Abstract: The present invention provides a metal-air battery, wherein a failure in a wiring portion can be repaired easily. The present invention provides a metal electrode cartridge including a first operation portion and a first insertion portion extended from the first operation portion, wherein the first insertion portion includes a first fuel electrode containing a metal serving as an electrode active material, the first operation portion includes a first fuel electrode terminal electrically connected to the first fuel electrode and a first air electrode connection portion, and the first air electrode connection portion includes a first internal connection terminal and a first external connection terminal.

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 hydrogen production device of the present invention includes a photoelectric conversion portion having a light-receiving surface and a back surface, a first electrolysis electrode provided on the back surface, and a second electrolysis electrode provided on the back surface. As a result of reception of light by the photoelectric conversion portion, a potential difference is generated between a first area on the back surface and a second area on the back surface, the first area becomes electrically connected to the first electrolysis electrode, and the second area becomes electrically connected to the second electrolysis electrode.

Abstract: The present invention provides a metal-air battery, wherein a failure in a wiring portion can be repaired easily. The present invention provides a metal electrode cartridge including a first operation portion and a first insertion portion extended from the first operation portion, wherein the first insertion portion includes a first fuel electrode containing a metal serving as an electrode active material, the first operation portion includes a first fuel electrode terminal electrically connected to the first fuel electrode and a first air electrode connection portion, and the first air electrode connection portion includes a first internal connection terminal and a first external connection terminal.

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: An electrode body for batteries of the invention includes a first metal portion configured to include metal as an electrode active material as a main component, a first structural member configured to cover a part of a surface of the first metal portion, and a coating member configured to cover the other part of the surface of the first metal portion. The first metal portion, the first structural member, and the coating member are provided such that the first metal portion is divided between the first structural member and the coating member or the coating member is separated from the first metal portion to expose the metal included in the first metal portion.

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: 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: A hydrogen production device of the present invention includes a photoelectric conversion portion having a light-receiving surface and a back surface, a first electrolysis electrode provided on the back surface, and a second electrolysis electrode provided on the back surface. As a result of reception of light by the photoelectric conversion portion, a potential difference is generated between a first area on the back surface and a second area on the back surface, the first area becomes electrically connected to the first electrolysis electrode, and the second area becomes electrically connected to the second electrolysis electrode.

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: 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: 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: 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.