Effect of PFSA Polymer Content in Catalyst Layer on PEFC Performance under Several Humidity Conditions
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The effects on cell performance of Nafion<sup>®</sup> content in 1 mg/cm<sup>2</sup> Pt with a Pt and carbon mixture containing 50 wt.% Pt (50 wt.%Pt/C-1 mgPt/cm<sup>2</sup>) catalyst layers were studied under several humidified operating conditions at 80°C and 1 atm. The optimum Nafion<sup>®</sup> content for these conditions was 28-32 wt.% (0.76-0.95 mg/cm<sup>2</sup>). The value obtained using the 50 wt.%Pt/C catalyst was compared with reported values obtained using 20 wt.%Pt/C or 20 wt.%PtCr/C catalyst. The catalyst layer’s activation polarization with insufficient Nafion<sup>®</sup> decreases concomitantly with increased humidity, but that of a layer with excessive Nafion<sup>®</sup> increases with increased humidity.
- Journal of The Surface Finishing Society of Japan
Journal of The Surface Finishing Society of Japan 60(10), 672-675, 2009-10-01
The Surface Finishing Society of Japan