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.
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 language | English |
|---|---|
| Pages (from-to) | 9868-9875 |
| Number of pages | 8 |
| Journal | Journal of Power Sources |
| Volume | 196 |
| DOIs | |
| Publication status | Published - 2011 |