Correlation of Synchrotron X-ray Radiography and Electrochemical Impedance Spectroscopy for the Investigation of HT-PEFCs

被引：49

作者：

Maier, W. ^{[1
]}

Arlt, T. ^{[2
]}

Wippermann, K. ^{[1
]}

Wannek, C. ^{[1
]}

Manke, I. ^{[2
]}

Lehnert, W. ^{[1
]}

Stolten, D. ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Energy & Climate Res, IEK Fuel Cells 3, D-52425 Julich, Germany

[2] Helmholtz Zentrum Berlin GmbH, Inst Appl Mat, D-14109 Berlin, Germany

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2012年 / 159卷 / 08期

关键词：

MEMBRANE FUEL-CELLS; ELECTRICAL DOUBLE-LAYER; POLYBENZIMIDAZOLE-MEMBRANE; PBI MEMBRANES; TEMPERATURE; ACID; PERFORMANCE; ELECTROLYTE; CAPACITANCE; CONDUCTIVITY;

D O I：

10.1149/2.024208jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Differently conditioned high temperature polymer electrolyte fuel cells (HT-PEFCs) were investigated by electrochemical impedance spectroscopy to study the influence of the break-in procedure on the overall fuel cell performance during the heating-up procedure as well as during different operating conditions. It is shown that a classical 70 h break-in leads to better fuel cell performance compared to a fuel cell which is used without any break-in procedure. A combination of synchrotron X-ray radiographic measurements with in situ time-dependent impedance spectroscopy was used to investigate the de-/hydration processes of the phosphoric acid type electrolyte within the components of the membrane electrode assembly (MEA) of a dynamically operated HT-PEFC. This helps to understand the fuel cell performance under different operating conditions. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.024208jes]

引用

页码：F398 / F404

页数：7

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