Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H₂ Limiting Current Test.

ABSTRACT: The gas diffusion layer (GDL), as a key component of proton exchange membrane fuel cells (PEMFCs), plays a crucial role in PEMFC's polarization performance, particularly in mass transport properties at high current densities. To elucidate the correlation between GDLs' structure and their mass transport properties, a limiting current test with the H₂ molecular probe was established and employed to investigate three representative GDLs with and without the microporous layer (MPL). By varying humidity and back pressure, the mass transport resistance of three GDLs was measured in an operating fuel cell, and an elaborate analysis of H₂ transport was conducted. The results showed that the transport resistance (R_DM) of GDLs was affected by the thickness and pore s

SUBMITTER: Wang M 

PROVIDER: S-EPMC10456699 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature