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Comprehensive understanding of electrical conductivity measurements of gas diffusion media of PEM fuel cells

: Aydin, Ö.; Zedda, M.; Zamel, N.; Groos, U.; Hebling, C.

Fulltext urn:nbn:de:0011-n-2984217 (381 KByte PDF)
MD5 Fingerprint: 97e02e5ac9e23cca4fa647ea06215f28
Created on: 16.8.2014

20th World Hydrogen Energy Conference, WHEC 2014. Vol.1 : Gwangju, South Korea, 15 - 20 June 2014
Red Hook, NY: Curran, 2015
ISBN: 978-1-63439-655-4
World Hydrogen Energy Conference (WHEC) <20, 2014, Gwangju/Korea>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Energietechnik; Wasserstoff- und Brennstoffzellentechnologie; Brennstoffzellensystem; conductivity; trough-plane; PEM fuel cells; gas diffusion media

Knowledge of the electrical resistivity of components in polymer electrolyte membrane (PEM) fuel cells is important. Generally, the electrical properties are dependent on the solid material of which the layers are composed as well as their physical structure (e.g. fiber alignment and geometry and porosity). Further, the electrical resistance between the layers affects the overall electrical properties of the cell. In this work, a comprehensive overview of techniques available to measure the electrical properties of the gas diffusion media of PEM fuel cells is given. Although the discussion covers the measurement of both in- and through- plane properties, attention is particularly given to the through-plane properties. Problems associated with measuring the electrical properties in the through-plane direction of highly porous and thin materials are hence discussed. Suggested solutions are finally given. The discussion is carried forward using measured properties.