A Graphite-coated Carbon Fiber Epoxy Composite Bipolar Plate for PEMFC

HaNa Yu, Jun Woo Lim, Jung Do Suh, Dai Gil Lee

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

In this study, a thin graphite layer is coated on the carbon/epoxy composite bipolar plate to decrease the interfacial contact resistance between the bipolar plate and the GDL. The total electrical resistance in the through-thickness direction of the bipolar plate is measured with respect to the thickness of the graphite coating layer, and the ratio of the bulk resistance to the interfacial contact resistance is estimated using the measured data. From the experiment, it is found that the graphite coating on the carbon/epoxy composite bipolar plate has 10% and 4% of the total electrical and interfacial contact resistances of the conventional carbon/epoxy composite bipolar plate, respectively, when the graphite coating thickness is 50 μm.

Highlights
► A thin graphite layer in the range of 2–50μm is coated on a carbon fiber epoxy composite by using a graphite foil and the laminator.
► The graphite-coated carbon/epoxy composite bipolar plate has 10% of the total electrical resistance of the conventional carbon/epoxy composite bipolar plate.
► The interfacial contact resistance of the graphite-coated carbon/epoxy composite bipolar plate is 4% of the conventional one.
Original languageEnglish
Pages (from-to)9868-9875
Number of pages8
JournalJournal of Power Sources
Volume196
DOIs
Publication statusPublished - 2011

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