Work

A comparison of PEM fuel cell parameters resulting from the distribution of relaxation times, distribution of transport times, and physics-based modeling

Year: 2025

Type: article

Abstract: Recently, the Distribution of Transport Times (DTT) technique has been suggested as a supplement to the distribution of relaxation times (DRT) technique for analyzing impedance spectra of PEM fuel cells. In this study, we compare the faradaic and transport resistivities obtained from DRT and DTT with those resulting from fitting the physics-based model (PBM) to the experimental spectra. The DTT of the PEMFC impedance without the low-frequency inductive loop yields peak resistivities that closely match those obtained from the PBM, whereas the peak resistivities derived from the DRT are generally less accurate. Moreover, unlike the DRT spectrum, the DTT successfully resolves the transport peak. We propose a modification to the composite kernel used in the DTT to describe spectra with a low-frequency “inductive” loop. An example of DTT calculated from an experimental spectrum containing such a loop is demonstrated.

Source: Electrochimica Acta

DOI: 10.1016/j.electacta.2025.147529

Authors: Tatyana Reshetenko, Andrei Kulikovsky

Institutions: University of Hawaiʻi at Mānoa, University of Hawaii System, Forschungszentrum Jülich

Language: English

Topic: Fuel Cells and Related Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,790