Decreasing resistances of membrane-electrode assemblies containing hydrocarbon-based ionomers for improving their anodic performances

作者：Kawaji Jun^*; Suzuki Shuichi; Takamori Yoshiyuki; Morishima Makoto

来源：Electrochimica Acta, 2010, 55(27): 8018-8022.

DOI：10.1016/j.electacta.2010.03.028

• Direct methanol fuel cell
• Membrane-electrode assembly
• Hydrocarbon ionomer
• Methanol oxidation reaction
• Electrochemical impedance spectroscopy

To improve methanol-oxidation performances of membrane-electrode assemblies composed of a hydrocarbon-based ionomers the resistances involved in the reaction were decreased Electrochemical impedance spectroscopy revealed that the proton-conductive resistance (R,) in the anode was decreased from 0 54 to 0 40 Omega cm(2) by increasing a loading ratio of platinum-ruthenium to carbon support of anode catalyst from 54 to 73 wt % In addition R(1) was decreased to be 0 25 Omega cm(2) by increasing ion-exchange capacity (IEC) of the ionomer from 1 4 to 2 9 mequiv g(-1) Consequently the polarization resist

• 出版日期2010-11-30