CATHODE DIFFUSION LAYER FOR A FUEL CELL

摘要

The invention relates to a direct methanol fuel cell, comprising an anode, an electrolyte and a cathode, whereby the cathode comprises a flow field with at least one cathode channel and the cathode channel borders the electrolyte through a cathode diffusion layer. Said fuel cell is characterised in that the cathode diffusion layer has varying water transport parameters along the cathode channel, in particular, varying porosity. An optimal water management for the total active surface of the diffusion layer is hence possible.