Fabrication bipolar plate metal aluminum coated carbon for PEMFC

The performance of Al-alloy bipolar plates for the PEMFC (proton exchange membrane fuel cell) system is investigated in this paper. The metallic bipolar plates are modified with coating carbon by spraying methods. The performance of the Al-alloy bipolar plates is evaluated by the coating structure, Interfacial contact resistance (ICR), corrosion penetration rate (CPR) and single cell performance. By the type graphite rods F, H, B, HB, 2B, 3B, and 4B Select conditions type graphite rods had lower resistance grinding mixed conductive paint. Used is a binder in coating Sprayed on the aluminum plate 6061 by had the condition in the coating substrate be 3, 6, 9 and 12 wt%. Thickness coating onto the sample and temperature using the coating different from studies ICR and CPR of the sample. The results showed factors graphite rods the type 4B had lower resistance. The aluminum plate 6061 through coating Sprayed at factor percent 9 wt% graphite the volume factor Sprayed 50 times have of results CPR 0.34348 mm/yr and results of ICR 87.67mΩcm2 a value is appropriate. The study of factors and of the temperature with substrate plate It was found that temperature to a substrate plate has very little ICR, but the results CPR of substrate can resistance corrosion at high temperatures and the temperature 50 °C have of results CPR 0.2636 mm/yr. Which are the proper conditions to apply for preparation bipolar plate metal aluminum coated carbon. The work studied the application in proton exchange membrane (PEM) fuel cells in order to generate green electric energy, demonstrating theoretical specific electric energy storage.