Abstract: A hybrid fuel cell system includes a fuel supply unit for supplying a fuel containing hydrogen, an oxygen supply unit for supplying oxygen, at least one electricity generation unit for generating electricity through an electrochemical reaction of the fuel supplied by the fuel supply unit and the oxygen supplied by the oxygen supply unit, and at least one electro-chemical capacitor disposed in the electricity generation unit.

Abstract: The fuel cell system includes a fuel supply unit for supplying a fuel containing hydrogen, an oxygen supply unit for supplying oxygen, an electricity generation unit for generating electricity through an electro-chemical reaction of the fuel supplied by the fuel supply unit or the hydrogen generated from the fuel, and the oxygen supplied by the oxygen supply unit, and a poison removing unit for removing a catalyst poison comprising carbon monoxide by applying a reverse voltage to the electricity generation unit when a voltage drops below a reference value due to catalyst poisoning of the electricity generation unit by the carbon monoxide.

Abstract: The polymer electrolyte membrane for a fuel cell comprises a hygroscopic substrate and a proton conductive polymer disposed at the inside, one side, and/or both sides of the hygroscopic substrate.

Abstract: The catalyst for a fuel cell of the present invention includes a compound including at least one element selected from the group consisting of silicon, aluminum, and titanium, and a catalytic metal.

Abstract: A fuel cell electrode includes a catalyst layer and an electrode substrate supporting the catalyst layer and including a conductive substrate. The catalyst layer includes a first catalyst supported on a carbon supporter and a second catalyst supported on an inorganic oxide supporter. The first catalyst includes an alloy of Pt and a metal selected from the group consisting of Co, Ni, and a mixture thereof, and the second catalyst includes an alloy of Pt and a metal selected from the group consisting of Co, Ni, and a mixture thereof.

Abstract: The present invention includes a catalyst for a fuel cell which contains a transition element core, and a surface layer that contains at least one selected from the group including platinum, a platinum-transition element alloy, and a combination thereof, and that exists on the surface of the core. The catalyst being prepared without a surfactant.

Abstract: Disclosed is a membrane-electrode assembly for a fuel cell including an anode and a cathode with a polymer electrolyte membrane placed between them. At least one of the anode and the cathode includes a catalyst layer including a catalyst metal with a hydrophilic polymer layer on the catalyst metal.