Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Panasonic Holdings Corporation

National University Corporation University of Yamanashi

Haruhiko Shintani

Yoichiro Tsuji

Nobuhiro Miyata

Atsushi Nogi

Masaki Yamauchi

Takashi Nakagawa

Masahiro Watanabe

Yasuo Takebe

Aoi Muta

Takeou Okanishi

Katsuyoshi Kakinuma

Tomokatsu Wada

Yusuke Fujita

Miho Gemba

Toshifumi Ueda

Makoto Uchida

A catalyst includes a mesoporous material and catalytic metal particles supported at least within the mesoporous material and containing platinum and a metal different from platinum. The mesoporous material has mesopores with a mode radius of 1 to 25 nm and a pore volume of 1.0 to 3.0 cm/g before supporting of the catalytic metal particles, and has an average particle size of greater than or equal to 200 nm. A molar ratio of the metal different from platinum and contained in the catalytic metal particles relative to all metals contained in the catalytic metal particles is greater than or equal to 0.25, and among the catalytic metal particles, a volume ratio of catalytic metal particles having a particle size of greater than or equal to 20 nm is less than or equal to 10%.

Catalyst, catalyst layer, membrane-electrode assembly, electrochemical device, and method for producing catalyst

An electrode catalyst of an electrochemical device according to the present disclosure is an electrode catalyst of an electrochemical device, the electrode catalyst including a mesoporous material; and catalyst metal particles supported at least in the mesoporous material. Before supporting the catalyst metal particles, the mesoporous material includes mesopores having a mode radius of 1 to 25 nm and a pore volume of 1.0 to 3.0 cm/g, and number density of the catalyst metal particles supported in the mesopores is lower at an outer side of the mesoporous material than number density of the catalyst metal particles supported in the mesopores at an inner side thereof.

Electrode catalyst of electrochemical device, electrode catalyst layer of electrochemical device, membrane electrode assembly of electrochemical device, electrochemical device, method for manufacturing electrode catalyst of electrochemical device, and method for manufacturing membrane electrode assembly of electrochemical device

An electrode catalyst layer of an electrochemical device is an electrode catalyst layer of an electrochemical device, the electrode catalyst layer including a mesoporous carbon; a catalyst metal supported at least in the mesoporous carbon; and an ionomer. Before supporting the catalyst metal, the mesoporous carbon has mesopores with a mode radius of 1 nm to 25 nm and a pore volume of 1.0 cm/g to 3.0 cm/g and has an average particle diameter of 200 nm or more.

Electrode catalyst layer of electrochemical device, membrane electrode assembly of electrochemical device, and electrochemical device

A method of fabricating a membrane electrode assembly, comprising: obtaining a mixture by mixing and kneading electrically conductive particles, a polymer resin, a surfactant, and a dispersion solvent (S); obtaining a sheet-like mixture by rolling out and shaping the mixture (S); obtaining a carbon sheet by heat-treating the sheet-like mixture at a first heat treatment temperature such that the surfactant and the dispersion solvent are removed from the sheet-like mixture (S); obtaining a dispersion liquid by mixing electrically conductive particles, a polymer resin, a surfactant, and a dispersion solvent (S); forming, on the carbon sheet, a dispersion liquid layer thinner than the carbon sheet by forming and drying a coating of the dispersion liquid on the carbon sheet (S); obtaining a gas diffusion layer in which a carbon layer is formed on the carbon sheet, by heat-treating the carbon sheet on which the dispersion liquid layer is formed at a second heat treatment temperature lower than the first heat treatment temperature such that the surfactant and the dispersion solvent are removed from the dispersion liquid layer (S); and stacking a catalyst layer and an electrolyte membrane in said order on the carbon layer (S).

Method of fabricating membrane electrode assembly and gas diffusion layer

A fuel cell of the present invention includes cell blocks () each formed by stacking cells () and a cooling medium connecting channel () connecting a cell block internal cooling medium channel (A) of the cell block () and a cell block internal cooling medium channel (B) of the cell block () in series. A catalyst layer includes a catalyst support and polymer electrolyte adhered to the catalyst support, the catalyst support containing an electrode catalyst and carbon powder supporting the electrode catalyst. The catalyst layer in the cellof the cell block () located downstream of the cooling medium connecting channel () is higher or larger in at least one selected from the group consisting of a density of an ion exchange group per unit volume of the catalyst layer, an electrode catalyst supporting amount of the catalyst support of the catalyst layer, and a catalyst supporting rate of the catalyst layer, than the catalyst layer of the cellof the cell blocklocated upstream of the cooling medium connecting channel

Fuel cell, fuel cell system, and method for operating fuel cell

A fuel cell of the present invention includes a membrane-electrode assembly (), an anode separator (), and a cathode separator (). The membrane-electrode assembly () includes: a polymer electrolyte membrane (); a first anode catalyst layer (A) and an anode gas diffusion layer () sequentially stacked on one of main surfaces of the polymer electrolyte membrane (); a second anode catalyst layer (B) disposed between the polymer electrolyte membrane () and the first anode catalyst layer (A); and a cathode catalyst layer () and a cathode gas diffusion layer () sequentially stacked on the other main surface of the polymer electrolyte membrane (). The second anode catalyst layer (B) contains a catalyst which adsorbs a sulfur compound.

Fuel cell, membrane-electrode assembly, and membrane-catalyst layer assembly

A membrane-membrane reinforcing member assembly includes: a polymer electrolyte membrane () having a substantially square shape; a pair of membrane-like first membrane reinforcing members () disposed on one main surface of the polymer electrolyte membrane () so as to extend along a pair of opposed sides, respectively, of four sides of said one main surface; and a pair of membrane-like second membrane reinforcing members () disposed on another main surface of the polymer electrolyte membrane () so as to extend along a pair of opposed sides, respectively, of four sides of said another main surface, wherein: portions of the polymer electrolyte membrane () at which portions the first membrane reinforcing members () and the second membrane reinforcing members () are disposed are concave; and the first membrane reinforcing members () and the second membrane reinforcing members () are disposed such that main surfaces thereof are exposed, and the first membrane reinforcing members () and the second membrane reinforcing members () surround a peripheral portion of the polymer electrolyte membrane () as a whole.

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Osaka, Japan

Haruhiko Shintani