Abstract:
PURPOSE: A polymer electrolyte membrane for a fuel cell is provided to improve physical properties and dimensional stability through a sulfonated hydrocarbon polymer and a sulfonated polybenzimidazole polymer. CONSTITUTION: A method for manufacturing a polymer electrolyte membrane for a fuel cell comprises the steps of: (i) respectively synthesizing a sulfonated hydrocarbon polymer and a sulfonated polybenzimidazole polymer; (ii) dissolving the sulfonated hydrocarbon polymer and sulfonated polybenzimidazole polymer in a solvent to prepare a film containing the sulfonated hydrocarbon polymer and sulfonated polybenzimidazole polymer; (iii) drying the film and evaporating a solvent; and (iv) performing acid treatment of the film to prepare a proton electrolyte membrane.
Abstract:
PURPOSE: A method for measuring electrochemical properties of an electrode of a fuel cell is provided to easily detect electrochemical properties in an operation condition of various relative humidity without non-linear data fitting. CONSTITUTION: A method for measuring electrochemical properties of an electrode of a fuel cell comprises the steps of: supplying non-reactive materials to the cathode or anode which is a measurement target electrode of a fuel cell and also supplying a material capable of operating an electrode of an opposite side as a reference electrode to an anode or cathode which is an electrode of an opposite side; and varying alternating frequency at a potential showing an electric dual layer reaction and measuring alternating current impedence of the fuel cell.
Abstract:
PURPOSE: A manufacturing method of a membrane-electrode assembly, a membrane-electrode assembly manufactured therefrom, and a fuel cell including thereof are provided to remarkably improve the porosity, and to enhance the power density of the fuel cell. CONSTITUTION: A manufacturing method of a membrane-electrode assembly comprises the following steps: producing catalytic ink slurry with a catalyst, an ion-conductive polymer, and a solvent; spreading the catalytic ink slurry to a supporting film, and vacuum drying the slurry; and transferring the supporting film to one or both sides of an electrolyte film, to form a catalyst layer on the electrolyte film.