Characterization of a Commercial Polymer Electrolyte Membrane Fuel Cell Stack by Means of Physics-Based Modeling and Distribution of Relaxation Times

Abstract

Impedance spectra of a commercial polymer electrolyte membrane fuel cell (PEMFC) stack are analyzed by means of fitting a physics-based model and distribution of relaxation times (DRT) techniques. Oxygen transport coefficients of the gas-diffusion layer, the cathode catalyst layer (CCL), and the CCL proton conductivity are determined for the stack current densities of 150, 250, and 400 mA cm −2 . DRT function returns reaction resistivity and transport resistivites of the channel and porous layers. A good agreement between the transport parameters resulting from the fitted model and DRT is demonstrated.

Understanding Localized Corrosion on Metal Surfaces Using Scanning Electrochemical Cell Impedance Microscopy (SECCIM)

“…Furthermore, we performed DRT analysis of the EIS spectrum to deconvolute the time-dependent evolution of various interfacial processes (charge transfer, adsorption, and formation of surface oxide film) in Figure . DRT has been used to study solid oxide fuel cell processes, − kinetics of lithium-ion batteries, and solid–liquid electrochemical interfaces of metals with the electrolyte . The time-resolved element makes DRT a powerful tool for identifying specific surface events that can be correlated with the EIS equivalent circuit.…”

Enhanced PEMFC performance through high O2 permeation and proton conductive electrospun nanofiber electrodes with unique ionomer construction

“…The Nyquist plots were interpreted in terms of ORR resistance, R H + and O 2 transport resistance by the distribution of relaxation times (DRT) method. 18,19…”

“…The Nyquist plots were interpreted in terms of ORR resistance, R H + and O 2 transport resistance by the distribution of relaxation times (DRT) method. 18,19 Characterization Cyclic voltammograms (CVs). CVs were obtained using a 25 cm 2 cell at different temperatures (30, 50, 60 and 80 °C) and RHs (20, 40, 60, 80 and 100%) between 0 V and 1.0 V versus the reversible hydrogen electrode (vs. RHE).…”

Challenges and opportunities for characterisation of high-temperature polymer electrolyte membrane fuel cells: a review

“…DRT analysis has been used in LT-PEMFCs to investigate transport properties of a commercial stack, 298 commercial stack fault characterisation, 29 analysis and modelling of electrode properties, 276,279,299 and investigation of low frequency inductive phenomena. 285 Fig.…”