ON-LINE IN-SITU DIAGNOSTICS OF PROCESSES WITHIN HT-PEM FUEL CELLS MEMBRANE BY RAMAN MICROSCOPY

机译：喇曼显微镜对HT-PEM燃料电池膜内过程的在线原位诊断

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This contribution describes how Raman spectroscopy can be applied to investigate the distribution of molecular species inside an ABPBI membrane of a running PEM fuel cell. For the in-situ measurements an experimental setup was first developed and then used to identify phosphoric acid species and to record how they change their concentrations when the current consumption of the fuel cell was changed. The observation port to look inside the membrane was placed next to the cathode. At that location among orthophosphoric acid, H3PO4H2O, a lot of oligophosphoric acid species are present where pyrophosphoric acid could unambiguously be identified. In comparison to all identified species pyrophoshoric acid and polyphosphoric acid undergo largest concentration changes when the current was changed.

机译：这一贡献描述了拉曼光谱技术如何用于研究运行中的PEM燃料电池ABPBI膜内部分子种类的分布。对于现场测量，首先开发了一种实验装置，然后将其用于识别磷酸种类，并记录当燃料电池的电流消耗发生变化时它们如何改变其浓度。观察膜内部的观察口位于阴极旁边。在正磷酸（H3PO4H2O）中的那个位置，存在许多低聚磷酸，可以清楚地鉴定出焦磷酸。与所有鉴定出的物种相比，当电流改变时，焦磷酸和多磷酸的浓度变化最大。

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来源
《11th fuel cell science, engineering, and technology conference 2013》|2013年|V001T01A008.1-V001T01A008.6|共6页
会议地点 Minneapolis MN(US)
作者
Hans Bettermann; Martin Labus; Anne Majerus; Carsten Korte; Werner Lehnert;
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Heinrich-Heine-University of Duesseldorf, Institute of Physical Chemistry Duesseldorf, Germany;

Heinrich-Heine-University of Duesseldorf, Institute of Physical Chemistry Duesseldorf, Germany;

Forschungszentrum Juelich GmbH, Institute for Energy and Climate Research, IEK-3, Fuel Cells, Juelich, Germany;

Forschungszentrum Juelich GmbH, Institute for Energy and Climate Research, IEK-3, Fuel Cells, Juelich, Germany;

Forschungszentrum Juelich GmbH, Institute for Energy and Climate Research, IEK-3, Fuel Cells, Juelich, Germany;

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5. Water management diagnostics of a proton exchange membrane fuel cell using Magnetic Resonance Imaging. [D] . Dunbar, Zachary W. 2009

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ON-LINE IN-SITU DIAGNOSTICS OF PROCESSES WITHIN HT-PEM FUEL CELLS MEMBRANE BY RAMAN MICROSCOPY

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