Tokuyama Corporation

Astom Corporation

Kenji Fukuta

Hiroyuki Yanagi

Takenori Isomura

Masayuki Kishino

Kanji Sakata

Shin Watanabe

Hitoshi Matsuoka

Kazuyuki Sadasue

Hiroshi Inoue

Shunichiro Nakatsukasa

Maki Kinoshita

Nobuyuki Tanaka

Kazuo Mizuguchi

Nobuhiko Ohmura

Yuki Watahiki

Hiroshi Miyazawa

Tomoaki Takahashi

Minoru Kawashima

Masumi Nagashima

A polymerizable composition for forming an ion-exchange resin precursor, the polymerizable composition containing a monomer component and polyethylene particles in an amount of 50 to 120 parts by mass per 100 parts by mass of the monomer component, wherein the monomer component contains an aromatic monomer for introducing ion-exchange groups and a nitrogen-containing aliphatic monomer, the nitrogen-containing aliphatic monomer being present in an amount of 10 to 35% by mass in said monomer component. An ion-exchange membrane is produced by applying the polymerizable composition onto a polyolefin type filament base material and polymerizing the polymerizable composition to form an ion-exchange resin precursor and, thereafter, introducing ion-exchange groups into the precursor.

Ion-exchange membrane

An ion exchange membrane having a structure that an ion exchange resin is filled in spaces of a porous base film, the porous base film has a structure that at least two porous olefin resin layers are laminated with a bonding strength of 100 gf/cm or more to less than 700 gf/cm and a Gurley air permeance of 500 sec/100 ml or less in terms of a 100 &#x3bc;m thick film. In this ion exchange membrane, base film has high air permeability though it has a multi-layer structure that a plurality of porous resin films are bonded together, and therefore a rise in electric resistance caused by the lamination of the base sheets is effectively suppressed.

Ion exchange membrane and production process therefor

Disclosed is a membrane for polymer electrolyte fuel cells, which is composed of a hydrocarbon anion-ex-change resin membrane wherein an anion-exchange group is covalently bonded to a hydrocarbon resin, and an adhesive layer formed on at least one side of the hydrocarbon anion-exchange resin membrane. The membrane for polymer electrolyte fuel cells is characterized in that the adhesive layer is made of an anion-exchange resin having a Young's modulus of 1-1000 MPa.

Separation membrane for solid polymer fuel cell and separation membrane-catalyst electrode assembly

A power generation system includes an alkaline fuel cell provided with an electrolyte membrane which is an anion exchange membrane and a pair of electrodes (an anode and a cathode) arranged on the both sides of the electrolyte membrane. The alkaline fuel cell can generate an electric power by supplying a fuel gas and an oxidizing agent gas to the anode side and the cathode side, respectively. The power generation system uses a hydrogen gas containing a basic compound such as ammonia as the fuel gas to be supplied to the anode side.

Power generation system using an alkaline fuel cell and fuel gas for alkaline fuel cells used in the system

A stable, high output is obtained with an anion exchange membrane-type fuel cell that generates electricity when air is supplied. An operating method for an anion exchange membrane-type fuel cell includes an anion exchange membrane electrode assembly for which an anode is joined to one surface of a anion exchange membrane and a cathode is joined to the other surface, and air is supplied to the cathode, wherein air with a reduced carbon dioxide concentration in the atmosphere is supplied to the cathode by a low carbon dioxide air supply system that supplies air with the reduced carbon dioxide concentration to the cathode.

Operating method of anion-exchange membrane-type fuel cell

The present invention discloses a membrane for polymer electrolyte fuel cell, which comprises

Diaphragm for solid polymer fuel cell and membrane-electrode assembly

Disclosed is a solid polymer electrolyte fuel cell membrane comprising an anion exchange membrane that contains a hydrocarbon-based anion exchange resin, wherein the water permeability at 25&#xb0; C. is 1400 g mhror greater, the anion exchange capacity is 0.2 to 5.0 mmol&#xb7;g, the percentage of water content at 25&#xb0; C. is 7% by weight or greater, and the thickness is 3 to 50 &#x3bc;m. It is especially preferable as a solid polymer electrolyte fuel cell membrane when said anion exchange membrane is an ion exchange membrane with a 5 to 15 &#x3bc;m-thick porous membrane substrate, wherein the voids in said porous membrane are filled with a hydrocarbon-based anion exchange resin.

Solid polymer electrolyte fuel cell membrane with anion exchange membrane

An anion-exchange membrane having quaternary ammonium groups or quaternary phosphonium groups wherein halogen ions serve as the counter ions is obtained. Rather than being subjected to ion exchange with an OH-type membrane using a toxic substance such as sodium hydroxide, the halogen-type anion exchange membrane is brought into contact with a carbonate solution and/or bicarbonate solution to directly obtain an anion exchange membrane where at least some of the counterions of the quaternary ammonium groups or quaternary phosphonium groups are COand/or HCO.

Method for producing an anion-exchange membrane for a solid polymer electrolyte type fuel cell

The present invention aims at providing an optimal constitution and production method for an OH-type anion-exchange hydrocarbon-based elastomer used when manufacturing a catalyst electrode layer of a solid polymer type fuel cell, in view of a balance of stability, durability and flexibility. Also, the present invention aims to provide an ion-conductivity imparting agent comprising the OH-type anion-exchange hydrocarbon-based elastomer, wherein the elastomer is uniformly dissolved or dispersed and has appropriate viscosity even with a high concentration. The anion-exchange hydrocarbon-based elastomer of the present invention has an iodine value of 3 to 25, contains an anion-exchange group having OH, COand/or HCOas a counterion in its molecule and is poorly-soluble in water. The hydrocarbon-based elastomer can preferably be used as an ion-conductivity imparting agent for forming a catalyst electrode layer by mixing an organic solvent.

OH-type anion-exchange hydrocarbon-based elastomer, use and production method thereof

An object of the present invention is to provide an electrolyte membrane-electrode membrane assembly for a solid polymer fuel cell having superior characteristics, wherein a gas diffusion electrode membrane and a solid electrolyte membrane are well bonded, and electrode catalysts are uniformly-dispersed to obtain high electrode activity, a production method thereof and a fuel cell equipped therewith. The electrolyte membrane-electrode membrane assembly of the present invention is produced by jointing a molded membrane for forming a gas diffusion electrode membrane formed by a paste composition including a polymeric organic compound having a quaternary base forming functional group and an electrode catalyst, with a quaternary base anion-exchange resin precursor membrane for forming a solid electrolyte membrane having a quaternary base forming functional group; forming of a quaternary base anion-exchange group by bonding a polyfunctional quaternarizing agent to the quaternary base forming functional group included in each of said molded membrane and said precursor membrane via each functional group of the polyfunctional quaternarizing agent which is present around the bonded interface of both membranes to thereby crosslink the formed anion-exchange resins in both membranes via the polyfunctional quaternarizing agent simultaneously; and subjecting the non-quaternarized residue of the quaternary base forming functional groups in thus-obtained assembly to a quaternary base forming treatment. A fuel cell comprising thus-produced electrolyte membrane-electrode membrane assembly is excellent in bonding property, durability and output voltage.

Electrolyte membrane-electrode membrane assembly for solid polymer fuel cell and production method thereof, and fuel cell equipped therewith

In the present invention is disclosed a method for producing a membrane for direct liquid fuel cell, which comprises polymerizing and curing a polymerizable composition containing at least

Separation membrane for direct liquid fuel cell and method for producing same

Disclosed is a process for producing a diaphragm for a fuel cell comprising a modified anion exchange membrane that substantially maintains durability and hydroxide ion conductivity as an electrolyte membrane and has improved resistance to methanol permeation. The process is characterized by comprising the step of impregnating at least one side of a crosslinked hydrocarbon anion exchange membrane with a polymerizable acidic compound having a weight average molecular weight of not less than 700 and less than 8000, provided that, when the acid site in the compound has been neutralized with a counter cation, the weight of the counter cation is subtracted from the molecular weight, and polymerizing the polymerizable acidic compound.

Separation membrane for fuel cell and production method thereof

The present invention discloses a membrane for direct-liquid fuel cell, comprised of a layered cation-exchange membrane whose one side is constituted by A) a cation-exchange membrane layer of low water content type having a water content of 1 to 15% by mass at a relative humidity of 50% RH (25&#xb0; C.) and whose other side is constituted by B) a cation-exchange membrane layer of high water content type having, at a relative humidity of 100% RH (25&#xb0; C.), a water content which is higher, by 3% by mass ore more, than the water content of the cation-exchange membrane layer of low water content type at a relative humidity of 100% RH (25&#xb0; C.), the layered cation-exchange membrane having an electrical resistance of 0.5 to 0.01 &#x3a9;&#xb7;cmin a 1 mol/L aqueous sulfuric acid solution at 25&#xb0; C.

Diaphragm for direct-liquid fuel cell and process for producing the same

There is provided an ion exchange membrane and preparation process thereof. The membrane has a porous film layer having pores with an average pore diameter of 0.01 to 2 &#x3bc;m and a surface layer existent on at least one side of the porous film. The pores of the porous film layer are filled with an ion exchange resin and the surface layer contains (a) an inorganic filler having an average primary particle longest diameter which is 0.1 time or more the average pore diameter of the pores of the porous film layer and 50 &#x3bc;m or less and (b) an ion exchange resin. The membrane is useful for a diaphragm of a direct methanol type fuel cell.

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Shunan, Japan

Kenji Fukuta