Pore Structure Analysis of Catalyst Layer

Due to the fuel cell reactions occurring inside the matrix catalyst layers, the reactant (gas or liquid) must pass through a gas diffusion layer (GDL) into the 

The effeetive diffusivity of the gas phase in porous media,, is related to 

The porosity of a gas diffusion layer (GDL) or a catalyst layer (CL) may be easily calculated from its real weight, the density of the solid phase, and the 

For a GDL or CL in PEM fuel cells, a high porosity is desirable in order to minimize the gas-phase diffusion losses, but extremely high porosities eould also lead to an increase in electrode electronic resistance. 

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