Abstract
In order to achieve high current density in PEFCs, it is necessary to suppress the increase in concentration overvoltage caused by the liquid water in the gas diffusion layer (GDL), especially in substrate layer. This study presents a thin self-standing microporous layer (MPL) to reduce liquid water accumulation in the GDL. The self-standing MPL was made by filling carbon particles into a carbon mesh specifically prepared for this study. The Cell performance was improved in the case of the self-standing MPL at high current density. Moreover, results of X-ray visualization showed that liquid water accumulation in the self-standing MPL was reduced compared to the case of the SIGRACET®️ 25BC.
Published Version
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