Distribution of current density across the active area at various stoichiometry ratios using the JRC ZERO∇CELL single cell PEM fuel cell testing hardware

The performance of the PEM fuel cell directly depends on partial pressure provided reactants, namely hydrogen and oxygen. Since reactants are consumed in reaction, decreases direction flow. This well-known mechanism makes dependent stoichiometry ratios input reactants. JRC ZERO∇CELL, a single testing setup, is developed to provide as much possible uniform operating conditions at 10cm 2 active area specimen, hence giving current density across cell. To investigate what real gradient for ZERO∇CELL various reactant ratios, segmented bi-polar plates collectors developed. study presents experimental investigation distribution setup range from λ = up 15. Current gradients considered along gas flow well transverse direction. results show that area, although dependant relatively small compared with wide investigated ratios.