Fuel crossover and internal current in polymer electrolyte membrane fuel cell from water visualization using X-ray radiography

► PEM fuel cell under OCV was visualized using X-ray radiography. ► Phenomena by the fuel crossover and internal current were observed. ► Transient MEA swelling and water accumulation were measured. ► This method effectively measured this transient phenomena. The fuel crossover and internal current...

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Bibliographic Details
Published in:Journal of power sources 2011-10, Vol.196 (20), p.8398-8401
Main Authors: Kim, Jongrok, Je, Junho, Kaviany, Massoud, Son, Sang Young, Kim, MooHwan
Format: Article
Language:English
Subjects:
Applied sciences
Crossovers
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrolytes
Electrolytic cells
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Fuel crossover
Fuels
Internal current
Membranes
Open-circuit voltage
Polymer electrolyte membrane fuel cell
X-ray radiography
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Summary:► PEM fuel cell under OCV was visualized using X-ray radiography. ► Phenomena by the fuel crossover and internal current were observed. ► Transient MEA swelling and water accumulation were measured. ► This method effectively measured this transient phenomena. The fuel crossover and internal current in a polymer electrolyte membrane fuel cell undergo a chemical reaction in the cell without power generation. These are the main phenomena for reduced cell voltage at low current density. This fuel crossover also degrades the fuel cell performance, efficiency, and durability. Thus, observation of these phenomena is important for understanding and developing a polymer electrolyte membrane fuel cell. Using X-ray radiography, the water distribution and membrane swelling, which indicate fuel crossover and internal current, in an operating polymer electrolyte membrane fuel cell under open-circuit conditions were examined. The X-ray images effectively demonstrated the transient changes of each phenomenon, which are related to the properties of each component and the operating conditions.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2011.05.072