Plasma treatment of the carbon fiber bipolar plate for PEM fuel cell

Title
Plasma treatment of the carbon fiber bipolar plate for PEM fuel cell
Authors
김민국임준우이대길유하나
Keywords
PEM fuel cells; Plasma etching treatment; Continuous-carbon/epoxy composite bipolar plate; Interfacial contact resistance
Issue Date
2012-04
Publisher
Composite structures
Citation
VOL 94, NO 5-1918
Abstract
A Polymer Electrolyte Membrane Fuel Cell or Proton Exchange Membrane (PEM) fuel cell stack is composed of a Gas Diffusion Layer (GDL), an Membrane Electrode Assembly (MEA), and bipolar plates. The electrical resistance of the bipolar plates for a PEM fuel cell should be very low, so that the electricity generated in the fuel cell is conducted through the bipolar plates with minimum electrical loss. In this study, a plasma etching treatment was developed to decrease the contact resistance between a GDL and continuous-carbon/epoxy composite bipolar plate. The treatment removes the resin-rich layer of the composite surface, which is the source of the majority of the electrical resistance of the bipolar plate. The optimum plasma treatment condition was determined by calculating the resin etching depth, taking into consideration the carbon fiber dimensions of the GDL and the continuous-carbon/epoxy composite bipolar plate. Scanning Electron Microscopy (SEM) analysis was performed on the surface of the composite bipolar plate for each variation of plasma surface treatment. In addition, the tensile strength and the electrical resistance (in the through-thickness direction) of the composite bipolar plate were measured for the different plasma surface treatment conditions.
URI
http://pubs.kist.re.kr/handle/201004/65604
ISSN
0263-8223
Appears in Collections:
KIST Publication > Article
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