乙烷质子交换膜燃料电池的研究

Pronton Exchange Membrane Fuel Cell Using Ethane as Fuel

研究了以乙烷作为燃料、全氟磺酸高分子膜(Nafion膜)作为质子交换膜、Pt或Pt-Ru作为电极催化剂主要组分、并通过掺杂Nafion膜作为电极内的离子导体构成的燃料电池电化学性能。研究了两种电极催化剂:Pt与Pt-Ru复合催化剂的制备及构成的单电池在不同温度及运行时间下的电化学性能。温度增加,电池性能变好;运行时间增加,电池性能下降,在相同的温度与运行时间下,Pt-Ru复合催化剂构成的电池比Pt催化剂构成的电池极化小。通过分析电极反应产物,探讨了乙烷电极及电池的反应机理。结构为C2H6,(Pt-Ru+膜材料复合阳极)/Nafion膜/(Pt+膜材料复合阴极),O2的质子交换膜燃料电池,在150℃时,电池的最大输出电流和功率密度分别高达70mA·cm-2和22mW·cm-2。

Performance of fuel cell using ethane as fuel, Nation membrane as proton exchange membrane, Pt or Pt-Ru as main compositions of electrode catalysts and admixing Nation material as proton conductor of anode and cathode was investigated. Two kinds of electrode catalysts, Pt and Pt-Ru, were fabricated. Electrochemical performance of a single fuel cell composed of Pt or Pt-Ru catalyst was studied at various operating tempertures and running times. It was found that the performance of cell increases with increasing operating temperature but decreases with increasing running time. Polarization of cell composed of Pt-Ru catalyst is smaller than that of cell composed of Pt at the same operating temperature and running time. Electrochemical oxidation mechanism of ethane fuel cell was explored through analyzing its anode and cathode reacting products. The maximum current and power densities of 70 mA·cm^-2and 22 mW·cm^-2 for the single fuel cell having the configuration of C2H6, （Pt-Ru composite anode）/ Nation membrane/（Pt composite cathode）, O2 were obtained at 150℃, respectively.