In situ observation of the water distribution across a PEFC using high resolution neutron radiography
In situ observation of the water distribution across a PEFC using high resolution neutron radiography
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DOI：
10.1016/j.elecom.2008.01.018
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发表时间：
2008-04-01
影响因子：
5.4
通讯作者：
Shinohara, K.
中科院分区：
文献类型：
--
作者：
Boillat, P.;Kramer, D.;Shinohara, K.
利用中子射线照相技术对聚合物电解质燃料电池（PEFC）膜电解质组件（MEA）的水分布进行了原位观察。为了解决MEA在不同层间的分布问题，采用了平面成像（细胞膜平行于光束）。利用PSI提供的新型探测器系统结合特定的各向异性分辨率增强方法，获得了前所未有的中子射线照相空间分辨率。在阴极GDL中观察到过量的水分对性能的不利影响。根据操作条件，观察到肋和通道之间的水含量有很强的分离，特别是在阴极GDL中。(c) 2008 Elsevier B.V.版权所有
The water distribution across the membrane electrolyte assembly (MEA) of a working polymer electrolyte fuel cell (PEFC) was observed in situ using neutron radiography. In order to resolve the distribution between the different layers of the MEA, in plane imaging (cell membrane parallel to the beam) was used. Unprecedented spatial resolution for neutron radiography was obtained using a new detector system available at PSI combined with specific anisotropic resolution enhancement methods. A detrimental effect on performance of excessive water content in the cathode GDL was observed. Depending on the operating condition, a strong separation of the water content between ribs and channel was observed, particularly in the cathode GDL. (c) 2008 Elsevier B.V. All rights reserved.