Abstract:
The present invention relates to a positive electrode composition for a polymer electrolyte membrane fuel cell which supports an electrode active catalyst through a novel polymer binder, and a membrane/electrode assembly including the same. More specifically, the present invention relates to a positive electrode composition for a polymer electrolyte membrane fuel cell using partial fluoro-based polyether which is sulfonated as a positive electrode binder of the polymer electrolyte membrane fuel cell, to a membrane/electrode assembly including the same, and to a method for producing the same. In the present invention, the hydrophobicity of an electrode binder is improved so that oxygen permeability is increased. Accordingly, the efficiency of catalyst use and material transferring properties in an electrode can be improved.
Abstract:
The present invention relates to a method for coating a novel porous support so as to improve the long-term performance of a polymer electrolyte fuel cell and, more particularly, to a method for coating a porous support which is used to manufacture a composite membrane of a polymer electrolyte fuel cell with a mussel-derived polymer; a composite membrane for the polymer electrolyte fuel cell including the porous support which is manufactured by using the method; and a method for manufacturing the same.
Abstract:
PURPOSE: A manufacturing method of a membrane-electrode assembly is provided to facilitate the movement of ions while preventing the volume change of the polymer electrolyte membrane by introducing porous cross-linking polymer to an interfacial adhesive layer, and to provide a membrane-electrode assembly with minimized resistance increase, and improved interfacial stability. CONSTITUTION: A manufacturing method of a membrane-electrode assembly comprises a step of manufacturing a composition for forming an interfacial adhesive layer, including a pre-cursor of a cross-linking polymer, a curing agent and a pore-forming agent; a step of forming an interfacial adhesive layer (120) using the composition for forming an interfacial adhesive layer on one side or both sides of a hydrogen ion conductive polymer electrolyte membrane (100); a step of forming an anode electrode (200) and a cathode electrode (300) on both sides of the hydrogen ion conductive polymer electrolyte membrane formed with the interfacial adhesive layer; and a step of cross-linking the interfacial adhesive layer and forming pores (400) on the interfacial adhesive layer.