Characterization of transport properties in gas diffusion layers for proton exchange membrane fuel cells

摘要: Abstract This is the second in a series of papers which we present methods demonstrated our group for estimation transport properties gas diffusion layers (GDLs) proton exchange membrane fuel cells (PEMFCs). Here describe method determining separately in-plane (x, y-directions) and through-plane (z-direction), viscous inertial permeability coefficients macro-porous substrates micro-porous by controlling direction flow through porous sample. The applied initially to substrate GDL alone subsequently with different on it. layer are calculated from two measurements. Darcy–Forchheimer equation application least squares. was GDLs having contents polytetrafluoroethylene (PTFE) carbon types. samples higher PTFE content have than those lower content. also depend type.