Karaca Ali, Galkina Irina, Sohn Yoo Jung, Wippermann Klaus, Scheepers Fabian, Glüsen Andreas, Shviro Meital, Müller Martin, Carmo Marcelo, Stolten Detlef
Institute of Energy and Climate Research (IEK-14): Electrochemical Process Engineering, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52428 Jülich, Germany.
Institute of Energy and Climate Research (IEK-1): Materials Synthesis and Processing, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52428 Jülich, Germany.
Membranes (Basel). 2023 May 17;13(5):522. doi: 10.3390/membranes13050522.
The polymer electrolyte membrane and its contact with electrodes has a significant effect on the performance of fuel and electrolysis cells but the choice of commercially available membranes is limited. In this study, membranes for direct methanol fuel cells (DMFCs) were made by ultrasonic spray deposition from commercial Nafion solution; the effect of the drying temperature and presence of high boiling solvents on the membrane properties was then analyzed. When choosing suitable conditions, membranes with similar conductivity, water uptake, and higher crystallinity than comparable commercial membranes can be obtained. These show similar or superior performance in DMFC operation compared to commercial Nafion 115. Furthermore, they exhibit low permeability for hydrogen, which makes them attractive for electrolysis or hydrogen fuel cells. The findings from our work will allow for the adjustment of membrane properties to the specific requirements of fuel cells or water electrolysis, as well as the inclusion of additional functional components for composite membranes.
聚合物电解质膜及其与电极的接触对燃料电池和电解槽的性能有显著影响，但市售膜的选择有限。在本研究中，通过超声喷雾沉积法从市售的Nafion溶液制备了直接甲醇燃料电池（DMFC）用膜；然后分析了干燥温度和高沸点溶剂的存在对膜性能的影响。在选择合适的条件时，可以获得具有与可比市售膜相似的电导率、吸水率和更高结晶度的膜。与市售的Nafion 115相比，这些膜在DMFC运行中表现出相似或更优异的性能。此外，它们对氢气的渗透率较低，这使其对电解或氢燃料电池具有吸引力。我们工作的研究结果将有助于根据燃料电池或水电解的特定要求调整膜的性能，以及为复合膜添加额外的功能组件。
