Effect of the MEA design on the performance of PEMWE single cells with different sizes
Effect of the MEA design on the performance of PEMWE single cells with different sizes
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DOI：
10.1007/s10800-018-1178-2
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发表时间：
2018-02
影响因子：
2.9
通讯作者：
C. Immerz;M. Paidar;G. Papakonstantinou;B. Bensmann;T. Bystron;T. Vidaković-Koch;K. Bouzek;K. Sundmacher;R. Hanke‐Rauschenbach
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文献类型：
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作者：
C. Immerz;M. Paidar;G. Papakonstantinou;B. Bensmann;T. Bystron;T. Vidaković-Koch;K. Bouzek;K. Sundmacher;R. Hanke‐Rauschenbach
摘要在聚合物电解质膜水电解（PEMWE）领域，在过去的几十年里，已经产生了大量优秀的科学成果。然而，这些结果在不同细胞类型和不同实验室之间的可比性和再现性并不总是简单的。在这篇文章中，在单细胞水平上的示例性环实验比较了三种细胞类型的性能：差分细胞（）和两种积分细胞：细长细胞（）和圆形细胞（）。因此，在三个实验室中使用不同制备的催化剂涂层膜（CCM）和多孔传输层（PTL）以及替代催化剂涂层电极（CCE）概念进行了双边和三边实验。这篇文章旨在评估系统性不平等的程度，这仍然允许对个别参数进行比较。CCM的制备方法的比较表明，初始的电化学特性没有显着的影响。在两个不同的电池中的阳极PTL的HCl蚀刻被证实是用于减少PEMWE电池中的欧姆损失的有用处理。自制的CCE不能作为替代概念，因为它们的电极和膜之间的接触不足，这在三个实验室中也观察到。在一个实验室中观察到的现象可以在另外一两个实验室中重现，这证明了不同细胞之间的一般相容性。在这种情况下，单电池的尺寸和几何形状不会影响性能，这表明在目前的测量范围内，在足够的供水速率下，不同的单电池都能正常工作。图形摘要
AbstractIn the field of polymer electrolyte membrane water electrolysis (PEMWE), a significant amount of excellent scientific results has been generated during the past decades. However, the comparability and reproducibility of these results between different cell types and different laboratories is not always straightforward. In this contribution, an exemplary ring experiment on the single-cell level compares the performances of three cell types: the differential cell () and two integral cells: an elongated cell () and a circular cell (). Therefore bi- and trilateral experiments were carried out with differently prepared catalyst-coated membranes (CCMs) and porous transport layers (PTLs) as well as with an alternative catalyst-coated electrode (CCE) concept in three laboratories. This contribution aims to evaluate the grade of systemic inequality, which still permits a comparison of individual parameters. The comparison of CCM preparation methods showed no significant influence on the initial electrochemical characteristics. An HCl etching of the anode PTLs in two different cells confirmed to be a useful treatment for the reduction of Ohmic losses in PEMWE cells. Self-made CCEs could not serve as an alternative concept, owing to their inadequate contact between the electrode and the membrane, which was observed in three laboratories as well. The general compatibility between the different cells was proven by the observation of a phenomenon in one laboratory that could be reproduced in one or two other laboratories. In this context, the size and geometry of the single cells did not influence the performance, indicating that up to the present measuring range and with sufficient water feed rates, the different single cells were functioning comparably.Graphical Abstract