直接甲醇燃料电池膜电极电化学性能影响因素

The factors impacting the electrochemical performance of MEA of DMFC

研究了温度、Nafion膜类型、甲醇浓度和甲醇流量对直接甲醇燃料电池 (DMFC)膜电极 (MEA )电化学性能的影响。甲醇流量的改变几乎不影响膜电极性能 ,而温度、Nafion膜类型和甲醇浓度对膜电极电化学性能有明显影响。在阴极为常压空气的条件下 ,本实验得到的MEA的最佳运行参数为 :t=60℃ ,聚合物电解质为Nafion 117膜 ,甲醇浓度为 1mol/L ,甲醇流量为 1ml/min或 6ml/min。

Effects of temperature, Nafion membrane types, methanol concentration and methanol flow on I V characteristics of MEA of DMFC were investigated . There was little impact on performance associated with methanol flows, but temperature , Nafion membrane types and methanol concentration significantly impacted the performances of MEA. The optimum operation parameters were obtained with ambient air as the cathode oxidant, that was , t=60℃, Nafion 117 as the polymer electrolyte membrane, methanol concentration for 1mol/L and methanol flow of 1ml/min or 6ml/min.