In-situ synchrotron X-ray radiography on high temperature polymer electrolyte fuel cells

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• 作者：Wiebke Maier ; Tobias Arlt ; Christoph Wannek ; Ingo Manke ; Heinrich Riesemeier ; Philipp Krü ; ger ; Joachim Scholta ; Werner Lehnert ; John Banhart ; Detlef Stolten
• 关键词：HT-PEFC ; Synchrotron X-ray radiography ; Membrane electrode assembly (MEA) ; Phosphoric acid
• 刊名：Electrochemistry Communications
• 出版年：2010
• 出版时间：October 2010
• 年：2010
• 卷：12
• 期：10
• 页码：1436-1438
• 全文大小：367 K

文摘

In contrast to classical low temperature polymer electrolyte fuel cells (LT-PEFCs), the membrane conductivity in high temperature polymer electrolyte fuel cells (HT-PEFCs) (operating temperature ~ 160 °C) is based on proton transport within phosphorus-oxygen acids at different levels of hydration, orthophosphoric acid (H₃PO₄) being the simplest example. We present for the first time in-situ synchrotron X-ray radiography measurements applied to a HT-PEFC to gain insight into the local composition of the membrane electrode assembly (MEA) under dynamic operating conditions. Transmission changes during the radiographic measurements exhibit a clear influence of the formation of product water on the membrane composition.