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首页> 外文期刊>Advanced Materials >Time/space-resolved Studies Of The Nafion Membrane Hydration Profile In A Running Fuel Cell
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Time/space-resolved Studies Of The Nafion Membrane Hydration Profile In A Running Fuel Cell

机译：正在运行的燃料电池中Nafion膜水化曲线的时间/空间分辨研究

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摘要

The determination of the amount and spatial distribution of water in a polymeric membrane of a proton-exchange-membrane fuel cell (PEMFC) under working conditions is a fundamental task to address in PEMFC technology. Indeed, since proton transfer in such polymeric materials is known to be assisted by water, the fuel-cell (FC) performances depend on the proton-exchange membrane (PEM) hydration degree. However, the hydration degree is influenced not only by the electrochemical conditions the FC is submitted to, but also by many other independent parameters, such as the constriction exerted on the membrane by the other FC components, the electrical current flowing across it, the actual temperature, aging effects, etc, which are hard to take into account in theoretical calculations. In this work, an original method based on very-high-energy synchrotron-radiation X-ray diffraction is applied to carry out the first space/time-resolved measurements of the PEM hydration profile in a running FC.
机译：在工作条件下，质子交换膜燃料电池（PEMFC）的聚合物膜中水的含量和空间分布的确定是PEMFC技术要解决的基本任务。实际上，由于已知此类聚合物材料中的质子转移受水辅助，因此燃料电池（FC）的性能取决于质子交换膜（PEM）的水合度。但是，水合度不仅受FC所处的电化学条件的影响，而且还受许多其他独立参数的影响，例如其他FC组分对膜施加的收缩，流经膜的电流，实际温度，老化效应等，这些在理论计算中很难考虑到。在这项工作中，基于超高能量同步辐射X射线衍射的原始方法被应用于在运行中的FC中对PEM水化曲线进行首次空间/时间分辨测量。

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