We have developed a non-isothermal analytical model for the impedance of the cathode catalyst layer (CCL) in a PEM fuel cell. In-phase harmonic perturbations to the current density and temperature reduce the impedance and the static polarisation resistivity of the CCL due to lowering proton transport losses. A special selection of the current and temperature perturbation amplitudes allows for complete elimination of these losses.
@article{arxiv.2603.17709,
title = {In-phase current and temperature oscillations reduce PEM fuel cell resistivity: A modeling study},
author = {Andrei Kulikovsky},
journal= {arXiv preprint arXiv:2603.17709},
year = {2026}
}