Temperature-dependent gas accumulation in polymer electrolyte membrane electrolyzer porous transport layers

We investigate the temperature-dependent gas saturation in the porous transport layer (PTL), and the subsequent impact of this gas saturation on the mass transport overpotential of a polymer electrolyte membrane (PEM) electrolyzer. Via in operando neutron imaging of a PEM electrolyzer, we observe that increasing the operating temperature results in a) the reduction of gas saturation in the PTL (particularly near the catalyst layer (CL)-PTL …