Honda Motor Co., Ltd.

Shin-etsu Chemical Co., Ltd.

Nok Corporation

Satoru Terada

Daisuke Okonogi

Noriyuki Meguriya

Osamu Hayashida

Yutaka Ebato

Shuhei Goto

Hiroyuki Tanaka

Matthew J Beutel

Masao Utsunomiya

Akihito Giga

Takahiro Takai

Yasuhiro Watanabe

Masahiko Sato

Takashi Kato

Seiji Sugiura

Takahiro Hayashi

Kentaro Ishida

Masaaki Sakano

Makoto Tsuji

Hiroshi Sohma

Suguru Ohmori

Satoshi Oyama

Masahiro Matsutani

Eri Terada

Takehiro Mugishima

Go Morimoto

Kenichi Tanaka

Kazuo Nunokawa

Masaki Tani

Takeshi Masaka

Shotaro Koga

Shintaro Tanaka

Hayato Kaji

Satomi Yogo

Yuki Hama

Mayu Kurata

A power generation cell of a fuel cell stack includes a resin frame equipped MEA and a first metal separator and a second metal separator. In the power generation cell, the relationship of P&#x3e;P&#x3e;Pis satisfied, where Pindicates a first surface pressure applied from a first seal part and a second seal part to a resin frame member, Pindicates a second surface pressure applied from a first support part and a second support part to the overlap part, and Pindicates a third surface pressure applied from first flow field forming protrusions and second flow field forming protrusions to the power generation area.

Power generation cell and fuel cell stack

A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member having a first frame shaped sheet provided on an outer peripheral portion of the membrane electrode assembly over the entire periphery. An outer peripheral portion of an electrolyte membrane is provided between a cathode and the first frame shaped sheet, stacked on an outer peripheral portion of the cathode, and joined to an inner peripheral portion of the first frame shaped sheet through an adhesive layer. The adhesive layer is filled in an area surrounded by an inner peripheral end of the first frame shaped sheet, an anode, and the electrolyte membrane.

Frame equipped membrane electrode assembly, method of producing the frame equipped membrane electrode assembly, and fuel cell

A frame equipped membrane electrode assembly includes a membrane electrode assembly and a frame member having a first frame shaped sheet provided on an outer peripheral portion of the membrane electrode assembly. An outer peripheral portion of an electrolyte membrane is provided between a cathode and the first frame shaped sheet, stacked on an outer peripheral portion of the cathode, and joined to an inner peripheral portion of the first frame shaped sheet through an adhesive layer. The elastic modulus of the first frame shaped sheet is larger than the elastic modulus of the electrolyte membrane. The elastic modulus of the adhesive layer is smaller than the elastic modulus of the first frame shaped sheet and the elastic modulus of the electrolyte membrane.

Frame equipped membrane electrode assembly and fuel cell

A power generation cell includes a frame member. The frame member includes a first frame shaped sheet and a second frame shaped sheet that are joined together. The second frame shaped sheet is provided outside a cathode through a gap. A method of operating a fuel cell includes supplying a first reactant gas to a channel formed between the frame member and a first separator, a pressure of the first reactant gas being higher than a pressure of a second reactant gas, and supplying the second reactant gas to a channel formed between the frame member and a second separator.

Method of operating fuel cell

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 unit cell that constitutes a fuel cell stack is obtained by sandwiching an electrolyte mem-brane/electrode structure with a cathode-side separator and an anode-side separator. A first resin member is provided along the entire periphery of the cathode-side separator in the outer peripheral portion of the cathode-side separator. Surfaces of the cathode-side separator are provided with sealing parts that cover a part of the first resin member and constitute a first sealing member.

Separator for fuel cells and method for producing same

First, a passive film is removed from a surface of a separator sheet. For example, the separator sheet may be immersed in an acidic liquid to remove the passive film. Then, the separator sheet is washed with water, taken out from the water, and heated. After the heating, the separator sheet is subjected to an electrolytic treatment to obtain a separator for a fuel cell. The resultant separator has a seal forming portion, and the outermost surface of the seal forming portion contains, based on 100% by weight of the total of a Cr oxide, an Mo oxide, an Fe oxide, Fe, and Ni, 5% by weight or less of the sum of the Fe and Ni and 60% by weight or more of the Cr oxide.

Fuel cell separator and method for producing the same

A fuel cell is formed by stacking a plurality of unit cells. Each of the unit cells includes a membrane electrode assembly, and an anode side metal separator and a cathode side metal separator sandwiching the membrane electrode assembly therebetween. In a surface of the cathode side metal separator, metal portions are exposed in at least part of a second flat portion in an area surrounded by seal lines SL of the anode side metal separator. Cutouts are formed on a surface of the cathode side metal separator by cutting at least part of the second flat portion up to the metal portions thereby to expose the metal portions through the cutouts.

Fuel cell with seal cut-outs on the separator in the gas passage

For use in a fuel cell separator comprising a separator substrate, a primer layer, and an elastomeric seal, a sealing material comprises a primer composition containing Si&#x2014;H groups of which the primer layer is formed, and a liquid addition-curable silicone rubber composition containing alkenyl groups and Si&#x2014;H groups of which the elastomeric seal is formed. A molar ratio of the total amount of Si&#x2014;H groups to the total amount of alkenyl groups per unit weight of the primer composition and the silicone rubber composition is in the range: 5.0&#x3c;Si&#x2014;H/alkenyl&#x3c;50.0.

Fuel cell separator sealing material and fuel cell separator

An adhesive suitable for solid polymer fuel cells is provided that has sufficient bond durability, so that the solid polymer electrolyte membrane and the gas diffusion layer do not separate, even with the solid polymer electrolyte fuel cell repeatedly wetting and drying, and changing in dimension. An adhesive including a base compound, a cross-linking agent, an adhesion promoting agent, and a reaction catalyst is employed using a specific base compound having alkenyl groups, and a specific cross-linking agent having Si&#x2014;H groups, in which the ratio of moles of the above Si&#x2014;H group relative to moles of the above alkenyl group (moles of Si&#x2014;H group/moles of alkenyl group) is adjusted to the range of 1.0 to 5.0.

Adhesive for fuel cell and membrane-electrode assembly produced using the same

A rubber composition comprising (A) an alkenyl-containing organopolysiloxane, (B) a silicone resinous copolymer, (C) an organohydrogenpolysiloxane, (D) fumed silica having a BET specific surface area of 50-400 m/g, (E) carbon powder having a BET specific surface area of 30-150 m/g, and (F) an addition reaction catalyst cures into a product which is useful as a separator seal in PEFCs. The rubber has a reduced compression set even in an acidic atmosphere or in contact with LLC, and the rubber itself has strength and good adhesion to separator substrates. The separator provides excellent seal performance over a long term.

Separator and separator seal for polymer electrolyte fuel cells

The present invention relates to a fuel cell separator and a method of producing the fuel cell separator. A first separator and a second separator are provided as the fuel cell separators. Firstly, the first separator and the second separator are heated. Thus, an Fe rich layer is formed in a surface layer of each of the first separator and the second separator, and a Cr rich layer where a proportion of Cr is 60% or more is formed in an inner portion of each of the first separator and the second separator. Then, an electrolytic treatment is applied to each of the first separator and the second separator to remove the Fe rich layer. By the removal, the Cr rich layer is exposed to the outside on the outermost surface layer of each of the first separator and the second separator.

Fuel cell separator with chromium rich surface layer and method of producing the fuel cell separator

A rubber composition comprising (A) a liquid alkenyl-containing organopolysiloxane with Mw&#x3c;100,000, (B) a gum-like organopolysiloxane with Mw&#x2267;150,000, (C) an organohydrogenpolysiloxane, (D) fumed silica, and (E) an addition reaction catalyst and having a viscosity of 20-200 Pa-s at a shear rate of 10 sand 25&#xb0; C. is effectively injection moldable into a cured product which is useful as a separator seal in PEFCs.

Disclosed is a rubber composition for separator seal, comprising (A) a mixture of two or more alkenyl-containing liquid organopolysiloxanes having different weight average molecular weights, (B) an organohydrogenpolysiloxane, (C) fumed silica having a BET specific surface area of 50-400 m/g, (D) carbon black having a BET specific surface area of 30 to 120 m/g, an iodine adsorption value of 30 to 120 mg/g, and a DBP absorption value of 100 to 200 ml/100 g, and (E) an addition reaction catalyst cures into a product which is useful as a separator seal in PEFCs.

A terminal plate, an insulating plate, and an end plate are stacked on a stack body. The terminal plate has current collectors at least at lower portions of an oxygen-containing gas supply passage, a coolant supply passage, a fuel gas discharge passage, a fuel gas supply passage, a coolant discharge passage, and an oxygen-containing gas discharge passage. The current collectors contact the water generated in the reaction or a coolant for collecting electricity.

Growing community of inventors

Wako, Japan

Satoru Terada