A design of and the process for forming a rigidly bonded metal supported electro-chemical device stack is provided. The electro-chemical device stack can be a solid oxide fuel cell or solid oxide electrolysis stack. The stack comprises multiple planar cells connected in serial by planar metal interconnects. The cells have metal support layers on both anode and cathode sides. The interconnect has gas channels embedded. Thin ceramic electro-chemical active electrodes and electrolyte are sandwiched between the metal support layers. The cells and interconnects are rigidly bonded to form a rigid body stack. The process comprises the steps of a). forming metal supported electro-chemical device cells with metal supports on both anode and cathode sides, b). sealing the peripherals of porous cell layers with an electrically insulating sealing material such as glass. c). bonding the cells and interconnects through commonly used metal-to-metal bonding methods, such as brazing or laser welding.

An Electrolyzer Cell (EC) configured to store electrical energy on charge and generate spontaneous hydrogen on discharge is provided, wherein the Electrolyzer Cell may include a cell casing having a casing bottom and defining a cell cavity. The Electrolyzer Cell may also include a plurality of positive electrodes, wherein the plurality of positive electrodes are electrically connected together and a plurality of negative electrodes, wherein the plurality of negative electrodes are electrically connected together. The Electrolyzer Cell may further include an aqueous electrolyte containing a reversible, electro-active material, wherein the aqueous electrolyte, the plurality of positive electrodes and the plurality of negative electrodes are located within the cell cavity, and wherein each of the plurality of positive electrodes are configured to be spaced apart from each of the plurality of negative electrodes.

An Electrolyzer Cell (EC) configured to store electrical energy on charge and generate spontaneous hydrogen on discharge is provided, wherein the Electrolyzer Cell may include a cell casing having a casing bottom and defining a cell cavity. The Electrolyzer Cell may also include a plurality of positive electrodes, wherein the plurality of positive electrodes are electrically connected together and a plurality of negative electrodes, wherein the plurality of negative electrodes are electrically connected together. The Electrolyzer Cell may further include an aqueous electrolyte containing a reversible, electro-active material, wherein the aqueous electrolyte, the plurality of positive electrodes and the plurality of negative electrodes are located within the cell cavity, and wherein each of the plurality of positive electrodes are configured to be spaced apart from each of the plurality of negative electrodes.

Disclosed are a metal/carbon-dioxide battery and a hydrogen production and carbon dioxide storage system including the same.

An object is to provide a methane synthesis device having as a whole a reduced size and a simplified configuration. A methane synthesis device 100 is composed of respective components from an end plate 2 at the leftmost side to an end plate 23 at the rightmost side and is compactly assembled by fastening plural bolts and nuts to bring these individual components into tightly contact with each other. The components may be divided into a Sabatier reaction unit of signs 3 to 9, a water electrolysis unit of signs 13 to 19, and other components. Hydrogen gas generated in the water electrolysis unit is mixed with carbon dioxide gas and supplied to the Sabatier reaction unit, and methane is synthesized in the Sabatier reaction unit. The size of the device is reduced as a whole and configuration is simplified by integrally stacking the water electrolysis unit, the Sabatier reaction unit, a carbon dioxide supplying unit, and a hydrogen gas supplying unit.

A metal support for an electrochemical element where the metal support includes a plate face, has a plate shape as a whole, and has a warping degree of 1.5×10.sup.−2 or less determined by calculating a least square value through the least squares method using at least three points in the plate face of the metal support, calculating a first difference between the least square value and a positive-side maximum displacement value on a positive side with respect to the least square value and a second difference between the least square value and a negative-side maximum displacement value on a negative side that is opposite to the positive side with respect to the least square value, and dividing the sum of the first difference and the second difference by a maximum length of the plate face of the metal support that passes through a center of gravity.

An apparatus composed of three canal basins with a lock in between to allow the storage of the solution in each basin. When the lock is lifted slightly it allows the solution to pass into the next basin for use in electrolysis. Carbon electrodes (e.g. mantle peridotite based-activated carbon electrodes or graphite electrodes) that are submerged in the solution (saltwater) are attached to the positive and negative wires of the battery. The battery provides the direct electric current (DC) to power the electrolysis. The carbon electrodes transfer the electrons to the cathode when electricity runs through and passes to the water and carbon electrodes. An electrode connects the cathode wire of the battery and collects some of the electrons and hydrogen ions and transfer them to the cathode tube storage. Afterwards, the hydrogen gas is transferred to the portable hydrogen tank.

An apparatus composed of three canal basins with a lock in between to allow the storage of the solution in each basin. When the lock is lifted slightly it allows the solution to pass into the next basin for use in electrolysis. Carbon electrodes (e.g. mantle peridotite based-activated carbon electrodes or graphite electrodes) that are submerged in the solution (saltwater) are attached to the positive and negative wires of the battery. The battery provides the direct electric current (DC) to power the electrolysis. The carbon electrodes transfer the electrons to the cathode when electricity runs through and passes to the water and carbon electrodes. An electrode connects the cathode wire of the battery and collects some of the electrons and hydrogen ions and transfer them to the cathode tube storage. Afterwards, the hydrogen gas is transferred to the portable hydrogen tank.

A reverse water-gas shift catalyst that can be used at a high temperature is obtained, and a production method thereof is obtained. The reverse water-gas shift catalyst is obtained by at least supporting one or both of nickel and iron as a catalytically active component on a carrier containing a ceria-based metal oxide or a zirconia-based metal oxide as a main component, and a ratio of the carrier to the entire catalyst is 55% by weight or more.

Systems and methods for separator plates, bipolar plates, stacks of plates, and electrochemical systems, comprising at least one through-opening for the passage of a fluid and a rim that delimits the through-opening. The rim having a curved course and a rectilinear course that adjoins the curved course. A bead arrangement extends around the curved course and the rectilinear course. An edge portion spans the bead arrangement and the rim, so that the bead arrangement is situated at a distance from the rim. A cutout formed in the curved course, so that a minimum distance of the bead arrangement from the rim is smaller in the curved course than in the rectilinear course.