Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
Catalyst layers (CLs) are an important component to determine the performance of polymer electrolyte fuel cells (PEFCs). To clarify the relationship between material distribution in the CLs and the cell performance is required. The objective of this study is to fabricate platinum (Pt)-graded CLs by intermittent double nozzle spray and show the effect of Pt distribution on cell performance. The two types of slurries, which contain platinum-supported carbon and carbon black, respectively, were sprayed intermittently to control Pt content in the thickness direction. Two CLs with different Pt slope were fabricated in the present study. One was a CL with positive Pt slope from gas diffusion layer side to a polymer electrolyte membrane side and the other was a CL with negative Pt slope. Performance test using the two CLs was conducted and the CL with positive Pt slope showed a better performance in a low humidity condition.
