期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 38, 期 21, 页码 8927-8933出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.04.142
关键词
Oxygen crossover; Polymer electrolyte membrane fuel cell; Permeability; Membrane degradation; Effective oxygen crossover ratio
资金
- IAMD of Seoul National University
- World Class University (WCU)
- National Research Laboratory (NRL) program of the Ministry of Education, Science and Technology
- New & Renewable Energy of the Korea institute of Energy Technology Evaluation and Planning (KETEP)
- Korea Government Ministry of Knowledge Economy [2011301003008A]
- Korea Evaluation Institute of Industrial Technology (KEIT) [2011301003008A] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, the exact amount of oxygen crossover that reacts with hydrogen has been investigated using a mass spectrometer system. By measuring the amount of oxygen crossover that reacts with hydrogen, the exact amount of oxygen crossover that affects membrane degradation and/or water generation can be calculated under the fuel cell operating conditions. The amount of oxygen crossover that reacts with hydrogen is expressed as an effective oxygen crossover ratio, which is in a range between 0.927 and 0.933 under the fuel cell operating temperature conditions. This means that approximately 93% of the entire oxygen crossover through the membrane can affect membrane degradation and/or water generation at the anode catalyst layer. Thus, the effective oxygen crossover ratio should be considered as a novel index of oxygen crossover because it represents the exact amount of oxygen crossover that reacts with hydrogen. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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