Abstract
The influence of artificial ageing of gas diffusion layers (GDL) on the water management within the GDL was investigated in-situ by synchrotron X-ray radiography. One GDL was subjected to an accelerated ageing procedure in 30 % H2O2 solution while another GDL was pristine. The GDLs were first assembled in test cells, after which the water distribution during operation was investigated. Radiographic measurements were combined with temporally resolved electrical analyses. Significant differences in cell voltage and water accumulation were observed in the GDL operated at steady-state conditions. In the cell containing the aged GDL, a higher water volume was found especially at the anode side while the cell voltage was lower.
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