Spatially resolved characterization of PEFCs using simultaneously neutron radiography and locally resolved impedance spectroscopy

Publication date
2005-11-02
Document type
Research article
Author
Schneider, Ingo A.
Wokaun, Alexander
Scherer, Günther
Organisational unit
Paul Scherrer Institut, Department General Energy, Electrochemistry Laboratory, CH-5232 Villigen PSI, Switzerland
DOI
URI
ISSN
Series or journal
Electrochemistry Communications
Periodical volume
7
Periodical issue
12
First page
1393
Last page
1397
Peer-reviewed
✅
Part of the university bibliography
Nein
Keyword
impedance spectroscopy
neutron radiography
segmented cell
pefc
water management
flooding
Abstract
A method for performing neutron radiography and locally resolved impedance spectroscopy simultaneously in Situ in all operating polymer electrolyte fuel cell (PEFC) is presented. The new method provides Concurrently spatially resolved information about the local cell performance, the locally limiting processes, and the liquid water distribution. Information about the impact of water oil cell performance and limiting processes call be gained in situ oil a local scale in all operating PEFC. The method was applied to a PEFC operated oil pure H-2/O-2 in co-flow mode under low humidity operating conditions. The results show that in co-flow mode strong flooding and severe drying can Occur at the very same time in different sections of a PEFC.
Version
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