Abstract: A proton conductor for a fuel cell, an electrode for a fuel cell that includes the proton conductor, and a fuel cell including the electrode of which the proton conductor includes a phosphoric acid-based material, and a C1-C20 ammonium perfluoroalkylsulfonate dissolved in the phosphoric acid-based material.

Abstract: An electrocatalyst for a fuel cell includes a Pt—Co-based first metal catalyst, a Ce-based second metal catalyst, and a carbon-based catalyst support. A method of preparing the electrocatalyst includes obtaining a mixture of metal oxides from a Pt precursor, a Co precursor, and a Ce precursor; impregnating the mixture of the metal oxides onto a carbon-based catalyst support under hydrogen bubbling; and thermally reducing the resulting product at 200 to 350° C. under a hydrogen atmosphere.

Abstract: Provided are an electrode for a fuel cell and a fuel cell employing the electrode, the electrode comprising a catalyst layer including: a catalyst; a material having stronger binding force to anions than the catalyst; and a binder. According to the electrolyte for a fuel cell, electrochemical surface area of the catalyst is maximized, and thus efficiencies in oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) of the catalyst are improved. Thus, a fuel cell having improved power generation efficiency may be prepared by employing the electrode.

Abstract: A supported catalyst includes a carbonaceous catalyst support and first metal-second metal alloy catalyst particles adsorbed on the surface of the carbonaceous catalyst support, wherein the difference between a D10 value and a D90 value is in the range of 0.1 to 10 nm, wherein the D10 value is a mean diameter of a randomly selected 10 wt % of the first metal-second metal alloy catalyst particles and the D90 value is a mean diameter of a randomly selected 90 wt % of the alloy catalyst particles. The supported catalyst has excellent membrane efficiency in electrodes for fuel cells due to uniform alloy composition of a catalyst particle and supported catalysts that do not agglomerate.

Abstract: A membrane electrode assembly for a fuel cell and a fuel cell employing the same. The membrane electrode assembly includes: a cathode; an anode; and a polymer electrolyte membrane that is interposed between the cathode and the anode, and comprises a proton conductive polymer that is doped with acid to a doping level of less than 200 mole %. The membrane electrode assembly for the fuel cell exhibits an improved efficiency of performance when acid is doped in the polymer electrolyte membrane at a doping level of less than 200 mole. In addition, the performance of the fuel cell can be optimized by separately adjusting the amount of acid doped in the cathode and anode. The fuel cell employing the membrane electrode assembly can be operated at a high temperature in a dry environment and exhibits an improved power generating performance.

Abstract: A fuel cell that has a structure that increases catalyst utilization is provided. The fuel cell includes an anode, a cathode, an electrolyte membrane interposed between the anode and the cathode, and a separator that has a fuel-flow field that supplies fuel to the anode formed on one of its sides, where the fuel-flow field has fuel-channel portions and supporting portions. It also includes a separator that has an oxidant-flow field that supplies an oxidant to the cathode formed on one of its sides, where the oxidant-flow field has oxidant-channel portions and supporting portions. The anode has a pattern corresponding to that of the fuel-channel portions, or the cathode has a pattern corresponding to that of the oxidant-channel portions, or the anode and the cathode have patterns corresponding to those of the fuel-channel portions and the oxidant-channel portions, respectively.

Abstract: The present invention provides a proton conductor comprising SnP2O7. The present invention also provides a fuel cell that comprising a cathode, an anode, and an electrolyte membrane, in which one of these components comprises SnP2O7. The SnP2O7 has high ionic conductivity of about 10?1 to 10?2 S/cm at about 80° C. or greater when non-humidified. In addition, SnP2O7 is water-insoluble, and stable at high temperatures. These properties make SnP2O7 suitable to act as a non-humidified proton conductor, or a high temperature non-humidified proton conductor.