NMR对燃料电池质子交换膜中水传递研究的贡献
NMR contributions to the study of water transfer in proton exchange membranes for fuel cells
AI总结：
本文回顾了核磁共振方法在研究Nafion型全氟化膜结构中水性质方面的贡献，阐述了质子交换膜燃料电池中水传递机制及其对质子传输的重要性。
摘要：
随着支持高效和可持续能源的项目的扩展，对氢载体潜在应用的研究正在加速。Proton exchange membrane fuel cells（质子交换膜燃料电池）是一种将氢的化学能转化为电能的电化学转换器。这些设备如今用于低和中功率的固定应用以及交通领域，如火车、汽车、自行车等。Proton exchange membrane fuel cells使用聚合物膜作为电解质。膜的作用是多方面的：它必须分离气体，是电子绝缘体和非常好的离子导体。此外，它必须抵抗自由基化学攻击并具有良好的机械强度。Nafion型全氟化膜具有所有这些特性：氟化主链天然是疏水的，但亲水性离子基团赋予材料优异的吸水性能。吸附在结构中的水具有极高的流动性，作为阳极产生质子的传输介质。尽管已经研究了很长时间并成为大量论文的主题，全氟化膜今天仍然是参考膜。本文回顾了液态核磁共振方法在研究Nafion型全氟化膜结构中水性质方面的一些贡献。
英文摘要：
As programs to support efficient and sustainable energy sources are expanding, research into the potential applications of the hydrogen vector is accelerating. Proton exchange membrane fuel cells are electrochemical converters that transform the chemical energy of hydrogen into electrical energy. These devices are used today for low- and medium-power stationary applications and for mobility, in trains, cars, bicycles, etc. Proton exchange membrane fuel cells use a polymer membrane as the electrolyte. The role of the membrane is multiple: it must separate gases, be an electronic insulator and a very good ionic conductor. In addition, it must resist free-radical chemical attack and have good mechanical strength. Nafion-type perfluorinated membranes have all these properties: the fluorinated backbone is naturally hydrophobic, but the hydrophilic ionic groups give the material excellent water sorption properties. The water adsorbed in the structure is extremely mobile, acting as a transport medium for the protons generated at the anode. Although it has been studied for a long time and has been the subject of a large number of papers perfluorinated membranes are still the reference membranes today. This article reviews some contributions of Nuclear Magnetic Resonance methods in liquid state to the study of water properties in the structure of Nafion-type perfluorinated membranes.
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