Effect of Double-Sided, 3D-Patterned Cathode Catalyst Layers on Polymer Electrolyte Fuel Cell Performance

Optimization of the structure cathode catalyst layers (CCLs) for promoting transfer reactants and products in polymer electrolyte fuel cells (PEFCs) is important improving cell performance. In this study, using theoretical equations, we confirmed that shortened proton conduction path ionomer layer (IL) with a 3D-patterned structure, compared to IL flat-patterned can improve We experimentally investigated effect included CCLs on Based combination flat- or 3D-pattern (CL), samples were categorized as Str. 1 (3D-patterned CL without IL), 2 (flat-patterned CL), 3 4 CL). All had different morphologies. According I–V curves impedance spectra data acquired at 80 °C 40% relative humidity, showed superior performance those other CCLs. These results indicate enhanced conductivity low humidity which usually poor, thereby resulting improved