Electrical TP-Resistance Measurement at Gas Diffusion Layers (GDL) for Pemfcs – Separation of Bulk and Contact Resistances

At electrical TP-resistance measurements of PEMFC GDLs often the separation of bulk and contact resistance is of interest. There are two possibilities for this task: 2-pole measurement with stacking of GDLs and 4-pole measurement with two non current conductive poles for pure voltage measurement. Both methods are discussed and evaluated within this poster. The results presented are acquired within the project QM-GDL (GDL quality assurance for the market run-up), which is funded by the German Federal Ministry for Digital and Transport under grant agreement number 03B11016C.