High performance gas diffusion layer to enhance the performanceof polymer electrolyte fuel cells under low humidity

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Gas diffusion layers (GDLs) coated with a hydrophobic microporous layer (MPL) have been commonly used to improve the water management property of polymer electrolyte fuel cells (PEFCs). In the present study, a novel hydrophilic and hydrophobic double MPL coated GDL was developed to enhance the PEFC performance under no-humidification at the cathode. The hydrophilic layer is effective to conserve membrane humidity. The hydrophobic intermediate layer between the hydrophilic layer and the substrate prevents the removal of water in the hydrophilic layer.