The impact of cathode gas diffusion layer structure on fuel cell performance

Four gas Diffusion Layer (GDL) materials have been investigated. Each Membrane Electrode Assembly (MEA) was manufactured with identical catalyst and binder loadings. MEAs were tested in-situ using a ‘Fuel Cell Component Analyser’ and polarisation curves produced and compared. GDL properties obtained in a previous work were considered for the analysis of the results. Results show differences in the polarisation response for different GDL structures; indicating changes in resistance loss, mass transport loss, and the flooding effects on fuel cells due to GDL structure.