A metal air battery system is provided with: a battery device including a negative electrode, a metal body electrically connected to the negative electrode, and a positive electrode and having a chamber which is defined between the negative electrode and the metal body and through which an electrolytic solution flows; an oxygen separation device for separating oxygen from air; and a bubbling device for supplying a gas containing oxygen separated by the oxygen separation device into the electrolytic solution supplied to the chamber while bubbling the gas.

A catalyst layer including: a catalyst-supported carbon including a catalyst including platinum supported on a carbon carrier; and an ionomer, in which the catalyst-supported carbon has a mesopore having a pore diameter of from 2 nm to less than 10 nm in a pore distribution obtained by a nitrogen adsorption method, at least a part of the ionomer exists in the mesopore having a pore diameter of from 2 nm to less than 10 nm, a content of the ionomer with respect to 100 parts by mass of the carbon carrier is 100 parts by mass or more, and an occupancy rate of the ionomer in a total volume of the mesopore having a pore diameter of from 2 nm to less than 10 nm is 50% by volume or less.

A carbon monoxide (CO) tolerant membrane electrode assembly (MEA) includes an ionically-conductive proton exchange membrane, an anode contacting a first side of the membrane and including a hydrophobic bonding agent, an ionomer bonding agent, first catalyst particles, second catalyst particles, and an anode gas diffusion layer (GDL), a cathode contacting a second side of the membrane and including a cathode GDL. The first catalyst particles are configured to preferentially catalyze oxidation of CO, and the second catalyst particles are configured to preferentially catalyze generation of hydrogen ions.

The present invention relates to a flow battery system. The system comprises a first and second electrode comprising a lattice structure and at least one electrolyte supply configured to provide flow electrolyte through at least one of the first and second electrodes. A power circuit is operatively connected to the first and second electrodes to provide electrical power from the system.

The invention relates to an electrode (1) for a flow battery (B) and a method for producing said electrode (1), wherein said electrode (1) comprises a first portion (12) consisting of particles (11) of electrically conductive material having nanometric dimensions, wherein said first portion (12) is mesoporous and its porosity is such as to increase the quantity of redox reactions per time unit in a flow of an electrolytic solution of said battery (B).

The invention relates to an electrode (1) for a flow battery (B) and a method for producing said electrode (1), wherein said electrode (1) comprises a first portion (12) consisting of particles (11) of electrically conductive material having nanometric dimensions, wherein said first portion (12) is mesoporous and its porosity is such as to increase the quantity of redox reactions per time unit in a flow of an electrolytic solution of said battery (B).

An electrode comprising galvanic membranes having a thickness defined by an average length of vectors normal to a membrane first surface and extending to where said vectors intersect a membrane uncompressed second surface; a non-porous metal sheet having first and second surfaces; a non-porous dielectric sheet having first and second surfaces; square weave metal wire screens having a wire diameter slightly greater than one half the at least one galvanic membrane thickness dimension; wherein, at least one galvanic membrane is adjacent the metal wire screen on the at least one galvanic membrane first and second surfaces in a stack of membranes and screens; the metal wire screen is adjacent the first surface of the non-porous dielectric sheet; the second surfaces of non-porous metal sheets have a sustained pressure of at least 7 million Pascal; and; the metal wire screen is collectively in incompressible vertical alignment with another metal wire screen.

An electrode comprising galvanic membranes having a thickness defined by an average length of vectors normal to a membrane first surface and extending to where said vectors intersect a membrane uncompressed second surface; a non-porous metal sheet having first and second surfaces; a non-porous dielectric sheet having first and second surfaces; square weave metal wire screens having a wire diameter slightly greater than one half the at least one galvanic membrane thickness dimension; wherein, at least one galvanic membrane is adjacent the metal wire screen on the at least one galvanic membrane first and second surfaces in a stack of membranes and screens; the metal wire screen is adjacent the first surface of the non-porous dielectric sheet; the second surfaces of non-porous metal sheets have a sustained pressure of at least 7 million Pascal; and; the metal wire screen is collectively in incompressible vertical alignment with another metal wire screen.

A fuel cell catalyst which has high power output characteristics and suppresses degradation of power generation performance due to starting, stopping or load variation; a manufacturing method thereof; a membrane electrode assembly for fuel cell; and a fuel cell including the same. The fuel cell catalyst includes at least catalytically active species and a carrier supporting the catalytically active species. The catalytically active species are at least one selected from the group consisting of platinum, a platinum alloy, and a core-shell catalyst in which a core of a metal different from platinum is coated with a shell containing platinum, the carrier is a carbon material, and at least one of the catalytically active species and the carrier contain(s) fluorine atoms.

A fuel cell catalyst which has high power output characteristics and suppresses degradation of power generation performance due to starting, stopping or load variation; a manufacturing method thereof; a membrane electrode assembly for fuel cell; and a fuel cell including the same. The fuel cell catalyst includes at least catalytically active species and a carrier supporting the catalytically active species. The catalytically active species are at least one selected from the group consisting of platinum, a platinum alloy, and a core-shell catalyst in which a core of a metal different from platinum is coated with a shell containing platinum, the carrier is a carbon material, and at least one of the catalytically active species and the carrier contain(s) fluorine atoms.