Sensing electrodes for failure diagnostics in fuel cells

被引：9
作者：
Herrera, O. [1 ,2 ]
Merida, W. [1 ,2 ]
Wilkinson, D. P. [1 ,3 ]
机构：
[1] Univ British Columbia, Clean Energy Res Ctr, Vancouver, BC V6T 1Z4, Canada
[2] Univ British Columbia, Dept Mech Engn, Vancouver, BC V6T 1Z4, Canada
[3] Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada
来源：
JOURNAL OF POWER SOURCES | 2009年 / 190卷 / 01期
关键词：
PEM fuel cell; Failure modes; Diagnostics; Sensing electrodes; ELECTROCHEMICAL IMPEDANCE SPECTRA; THIN-FILM ELECTRODE; CARBON-MONOXIDE; LIQUID WATER; MICROSTRUCTURAL MODIFICATION; H-1-NMR MICROSCOPY; CATHODE CHANNELS; CHEMICAL SENSORS; PRESSURE-DROP; MEMBRANE;
D O I：
10.1016/j.jpowsour.2008.08.034
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The durability and reliability of fuel cell products need to be improved. The lack of early diagnosis and failure-prevention techniques is one of the limiting factors. We present a non-invasive method for the early diagnosis of flooding, dehydration and low fuel stoichiometry (three common failure modes). Our method is based on microsensing electrodes (SE) that are placed at appropriate locations in a single cell. These electrodes have a characteristic potential response to each of the failure modes, which enables detection prior to overall fuel cell failure. The specific features in the measured responses (or combinations thereof) can be used to discern between different failure modes. and initiate corrective actions. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：103 / 109
页数：7
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