To provide a polymer electrolyte membrane and a membrane/electrode assembly for a polymer electrolyte fuel cell, excellent in the durability to hydrogen peroxide or peroxide radicals. A polymer electrolyte membrane 15 comprising an ion exchange resin havin...

Disclosed is an electrochemical device. The electrochemical device includes: (a) a composite separator including a porous substrate, a first porous coating layer coated on one surface of the porous substrate, and a second porous coating layer coated on the...

An object of the present invention is to provide a polymer electrolyte membrane meeting power generation properties and physical durability at the same time and having high durability. A polymer electrolyte membrane comprising a microporous membrane and a ...

A method for preparing an anion exchange membrane suitable for use in an alkaline fuel cell and particularly in a direct borohydride fuel cell, involves radiation grafting a hydrocarbon polymer film with a monomer and adding a quaternising agent. The degre...

An electrolyte membrane having a structure wherein fine rubber particles having substantially no ion-conducting group and having an average particle size of 20 nm to 1 µm are uniformly dispersed in a matrix including a resin component having ion-conductin...