Study on surface topography of 446M stainless steel as a bipolar plate on interfacial contact resistance of polymer electrolyte membrane fuel cell

▸ The roughness of bipolar plate can affect deformation of the carbon fibers in GDL. ▸ The higher deformation of carbon fibers leads to larger real contact area. ▸ The rough stainless steel has a lower ICR value than the fine one. ▸ The roughness of bipolar plate can be one of the key factors to decrease ICR.