Statistical analysis of the effect of temperature and inlet humidities on the parameters of a semiempirical model of the internal resistance of a polymer electrolyte membrane fuel cell

Abstract

The internal resistance of a PEM fuel cell depends on the operation conditions and on the current delivered by the cell. This work's goal is to obtain a semiempirical model able to reproduce the effect of the operation current on the internal resistance of an individual cell of a commercial PEM fuel cell stack; and to perform a statistical analysis in order to study the effect of the operation temperature and the inlet humidities on the parameters of the model. First, the internal resistance of the individual fuel cell operating in different operation conditions was experimentally measured for different DC currents, using the high frequency intercept of the impedance spectra. Then, a semiempirical model based on Springer and co-workers' model was proposed. This model is able to successfully reproduce the experimental trends. Subsequently, the curves of resistance versus DC current obtained for different operation conditions were fitted to the semiempirical model, and an analysis of variance (ANOVA) was performed 2 in order to determine which factors have a statistically significant effect on each model parameter. Finally, a response surface method was applied in order to obtain a regression model.

CuO improved (Sn,Sb)O2 ceramic anodes for electrochemical advanced oxidation processes

“…The uncompensated resistance is given by the high frequency intersect of the EIS spectrum with the real axis: in this work, the uncompensated resistance for each overpotential was determined from the high frequency intersect of the experimentally measured impedance spectrum for that overpotential with the real axis. Both, the CVs and the pseudo‐steady‐state polarization curve, were I‐R corrected using the procedure described by Hrbac et al, and the uncompensated resistances determined from EIS measurements.…”

Improvement of the Electrochemical Behavior of (Sb, Sn, Cu)O Ceramic Electrodes as Electrochemical Advanced Oxidation Anodes

“…[44] For this reason, validation is a fundamental part of the preliminary analysis of experimental EIS spectra. [52,53] The uncompensated resistance is given by the high frequency intersect of the EIS spectrum with the real axis: [54] in this work, the uncompensated resistance for each overpotential was determined from the high frequency intersect of the experimentally measured impedance spectrum at that overpotential with the real axis. [47,48] In this work, the EIS measurements were performed at 100 frequencies logarithmically spaced between 10 kHz and 10 mHz.…”

“…This amplitude was selected using the selection methodology presented in previous works. [52,53] The uncompensated resistance is given by the high frequency intersect of the EIS spectrum with the real axis: [54] in this work, the uncompensated resistance for each overpotential was determined from the high frequency intersect of the experimentally measured impedance spectrum at that overpotential with the real axis. Both, the CVs and the pseudo-steady-state polarization curve, were IÀ R corrected using the procedure described by Hrbac and co-…”

Optimization of the PEMFC operating parameters for cathode in the presence of PtCo/CVD graphene using factorial design

“…DoE approach finds dependencies between variable factors and helps to set parameter values where optimum performance is obtained with minimal number of experiments. 2,[24][25][26] Several researchers have investigated the influence of various parameters, ie, temperature, [27][28][29][30][31][32] reactant pressure, 27,30,31 reactant flow rate, [27][28][29][30][31] and humidity, 30-32 on fuel cell performance by DoE. Generally, design methods such as factorial design, 18,[33][34][35][36][37][38] Taguchi, 26,39 and response surface 24,28,34,[40][41][42] are used.…”