Keywords
bipolar plates
conductive polymer composites
expanded graphite
fuel cell
percolation threshold.
polyimide
Abstract
Expanded graphite-polyimide composites for fuel cells containing from 0 to 23 wt% expanded graphite were produced by direct compression molding after pre-mixing the binder and filler. The percolation threshold in this system was determined to be 2.5%, while the corrosion current was 3 × 10−2 μA cm−2, and the composites were thermally stable up to 400 °C.
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