Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Tanaka Kikinzoku Kogyo K.k.

Masaki Tani

Shinya Watanabe

Kaoru Fukuda

Shigeru Inai

Chikara Iwasawa

Shintaro Tanaka

Yukihito Tanaka

Suguru Ohmori

Hiroshi Shinkai

Katsuhiko Kohyama

Yoshihito Kimura

Hayato Kaji

Ryugo Fujitsuka

Takeshi Muro

Seiji Sugiura

Keisuke Andou

Ichiro Tanaka

Satoru Terada

Eri Terada

Tomoyuki Tada

Kazuo Nunokawa

Yuichiro Hama

Junji Matsuo

Masahiko Inoue

Junichi Yano

A resin frame equipped membrane electrode assembly includes an MEA having different sizes of components, and a resin frame member. A resin melt portion is provided for the resin frame member. The inside of a first gas diffusion layer is impregnated with resin as a part of the resin melt portion. A thin portion is provided at an outermost peripheral portion of the resin frame member through a step at an outermost peripheral portion of the resin melt portion, and the thin portion is thinner in a thickness direction than the resin melt portion.

Resin frame equipped membrane electrode assembly for fuel cell and method of producing the same

A resin-framed stepped membrane electrode assembly for a fuel cell, includes a stepped membrane electrode assembly and a resin frame member. The resin frame member surrounds a membrane outer periphery end of a solid polymer electrolyte membrane and includes an inner protruding portion protruding from the membrane outer periphery end toward a second electrode and is joined to the stepped membrane electrode assembly with an adhesive. The inner protruding portion includes a bank portion, a groove portion, and a ledge portion. The roughness of the bank surface is smaller than a roughness of the groove surface.

Resin-framed stepped membrane electrode assembly for fuel cell

A membrane-electrode structure having an electrode catalyst layer adhered to a diffusion electrode, wherein the structure is manufactured by applying a catalyst paste onto a sheet substrate, and then dried to form a plurality of electrode catalyst layers. The electrode catalyst layers are thermally transferred onto each side of a polymer electrolyte membrane to form a laminated body. A first slurry is applied on a carbon substrate layer, and dried to form a water-repellent layer, and then, a second slurry is applied on the water-repellent layer, and dried to form a hydrophilic layer to form a diffusion electrode. The diffusion electrode is then laminated on the electrode catalyst layer through the hydrophilic layer, and then pressed under heating to integrate the laminated body and the diffusion electrode.

Method for producing membrane-electrode structure and polymer electrolyte fuel cell

An electrode for a solid polymer fuel cell includes a gas diffusion layer, an electrode catalyst layer disposed between a solid polymer membrane of the fuel cell and the gas diffusion layer, and a water-holding layer disposed between the gas diffusion layer and the electrode catalyst layer. Under high-relative humidity conditions of reaction gases, flooding can be prevented because the electrode catalyst layer is made porous, while under low-relative humidity conditions of reaction gases, sufficient water contents can be stably provided thanks to the water-holding layer so that proton conductivity of the solid polymer membrane can be maintained appropriately. Consequently, high-performance and high-durability electrode and membrane electrode assembly for a solid polymer fuel cell can be provided such that the performance and the durability thereof are not affected by change in relative humidity in reactant gases supplied to the solid polymer fuel cell.

Electrode for solid polymer fuel cell

A solid polymer electrolyte fuel cell has a fuel electrode and an oxidant electrode, which face each other via a solid polymer electrolyte membrane. A metallic complex is added to the fuel electrode of the solid polymer electrolyte fuel cell. Since this metallic complex adsorbs oxygen as the oxygen partial pressure at the fuel electrode increases and desorbs oxygen as the oxygen partial pressure decreases, oxygen produced when a reverse voltage is generated can be removed efficiently. It may be possible to prevent the deterioration of or damage to a catalyst material of the fuel cell and the electrolyte membrane.

Fuel electrode for solid polymer electrolyte fuel cell, solid polymer electrolyte fuel cell and method for controlling solid polymer electrolyte fuel cell

A membrane electrode assembly for polymer electrolyte fuel cells comprises a cathode electrode, an anode electrode, and a polymer electrolyte membrane placed between these electrodes, and a catalyst material of Pt&#x2014;Ru alloy is contained in the anode and the crystal of Pt&#x2014;Ru alloy is mainly of a face-centered cubic structure.

Membrane electrode assembly for polymer electrolyte fuel cell

A membrane electrode assembly for a polymer electrolyte fuel cell has a polymer electrolyte membrane, an anode, and a cathode having a catalytic layer and a diffusion layer. The alloy catalyst contains ruthenium in the anode diffusion layer. The assembly has less loss of efficiency, particularly when operated at high potentials.

Growing community of inventors

Wako, Japan

Masaki Tani