A Detailed Analysis of Internal Resistance of a PEFC Comparing High and Low Humidification of the Reactant Gases

Santana, J.; Espinoza‐Andaluz, Mayken; Li, Tingshuai; Andersson, Martin

doi:10.3389/fenrg.2020.00217

Cited by 25 publications

(34 citation statements)

References 25 publications

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“…Regardless, the software Zview was used to extract the ohmic resistance through a modeling curve based on an equivalent circuit for better accuracy. Equivalent circuit used to model the Nyquist diagrams [11].…”

Section: Electrochemical Impedance Spectroscopy Interpretationmentioning

confidence: 99%

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Impact of the Temperature on the Proton Conductivity and Power Output of a PEFC Operating at High Current Densities

Santana-Villamar¹,

Espinoza‐Andaluz

Andersson

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Polymer Electrolyte Fuel Cells (PEFCs) have great potential as clean energy conversion devices. Therefore, studies are required to increase the understanding of a PEFC at real operating conditions. Two variables that significantly affect the performance are the temperature and the current load. In the present study, a fundamental constitutive part’s performance, e.g., the polymeric membrane (PM) Nafion 212, was evaluated by obtaining its proton conductivity. Also, the cell performance is evaluated considering its output power. Tests were performed in a temperature range of 40-90 °C in steps of 5 °C at a constant current of 50 A. The results show a direct correlation between the proton conductivity and the temperature, and for temperatures greater than 85 °C, the proton conductivity has a growth negligible. It was also found that the PEFC output power has an exponential trend with maximum performance at 75 °C with a power of 25.1 W and proton conductivity of 63 mS.cm−1. Besides, an analysis of the internal factors that impact the proton conductivity and the performance is presented. Finally, empirical correlations for proton conductivity and power output as a function of the temperature with an R-squared larger than 0.96 are proposed.

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Section: Electrochemical Impedance Spectroscopy Interpretationmentioning

confidence: 99%

“…Figure 2. a) Schematic of Nyquist Diagram based on PEFC operation at high current density. b)Equivalent circuit used to model the Nyquist diagrams[11].…”

mentioning

confidence: 99%

Impact of the Temperature on the Proton Conductivity and Power Output of a PEFC Operating at High Current Densities

Santana-Villamar¹,

Espinoza‐Andaluz

Andersson

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…(1.0 Acm -2 ) density regions are limited by charge transfer and ohmic resistance, respectively. The spectra were analyzed based on a typical equivalent circuit for PEMFC (Figure S1) 64,65 , where the resistance are separated into ohmic resistance (RΩ) representing total ohmic resistance of the fuel cell, charge transfer resistance (Rct) mainly due to oxygen reduction reaction (ORR), and mass transport resistance (Rmt) related to the diffusion of O2 in the CL and the GDL. The values for each resistance can be found in Table S1.…”

Section: Fabrication Of Mea and Characterizationmentioning

confidence: 99%

Effect of Surface Roughness of Carbon Nanotube-based Catalyst Layer for Polymer Electrolyte Membrane Fuel Cell Performance

Fujigaya

Phua

Weerathunga

et al. 2022

Preprint

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The effect of surface roughness of the catalyst layer (CL) based on carbon-nanotube (CNTs) in contact with polymer electrolyte membrane (PEM) in polymer electrolyte membrane fuel cell (PEMFC) was studied. The surface roughness of vacuum-filtrated CL sheets were evaluated using laser microscope and the surface of CL sheet contacting the filter membrane was found to be smoother compared to the surface exposed to the air. When a smoother surface of the CL sheet was laminated with PEM to fabricate membrane-electrode-assembly (MEA), power density of the single cell was 604.6 mW cm-2 at 80 °C under 100%R.H., which was greater than the MEA having a rougher CL surface (542.4 mW cm-2).

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“…In Figure 3, the polarization curves obtained in the present study are shown for different RH of the reactant gases. RH is one of the most important independent variables that affect the performance of a PEFC, as shown in studies [37,38,59]. It is caused mainly for the polymeric membrane used in PEFC.…”

Section: Rh Impact On Performance Of a Pefcmentioning

confidence: 99%

“…The collected data come from a lab-scale FC test system employing different conditions of RH. It is one of the most critical variables that affect the performance of a PEFC [37,38]. Thus, the main contributions of this work are:…”

Section: Introductionmentioning

confidence: 99%

Optimization Algorithms: Optimal Parameters Computation for Modeling the Polarization Curves of a PEFC Considering the Effect of the Relative Humidity

et al. 2021

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The development of green energy conversion devices has been promising to face climate change and global warming challenges over the last few years. Energy applications require a confident performance prediction, especially in polymer electrolyte fuel cell (PEFC), to guarantee optimal operation. Several researchers have employed optimization algorithms (OAs) to identify operating parameters to improve the PEFC performance. In the current study, several nature-based OAs have been performed to compute the optimal parameters used to describe the polarization curves in a PEFC. Different relative humidity (RH) values, one of the most influential variables on PEFC performance, have been considered. To develop this study, experimental data have been collected from a lab-scale fuel cell test system establishing different RH percentages, from 18 to 100%. OAs like neural network algorithm (NNA), improved grey-wolf optimizer (I-GWO), ant lion optimizer (ALO), bird swarm algorithm (BSA), and multi-verse optimization (MVO) were evaluated and compared using statistical parameters as training error and time. Results gave enough information to conclude that NNA had better performance and showed better results over other highlighted OAs. Finally, it was found that sparsity and noise are more present at lower relative humidity values. At low RH, a PEFC operates under critical conditions, affecting the fitting on OAs.

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A Detailed Analysis of Internal Resistance of a PEFC Comparing High and Low Humidification of the Reactant Gases

Cited by 25 publications

References 25 publications

Impact of the Temperature on the Proton Conductivity and Power Output of a PEFC Operating at High Current Densities

Impact of the Temperature on the Proton Conductivity and Power Output of a PEFC Operating at High Current Densities

Effect of Surface Roughness of Carbon Nanotube-based Catalyst Layer for Polymer Electrolyte Membrane Fuel Cell Performance

Optimization Algorithms: Optimal Parameters Computation for Modeling the Polarization Curves of a PEFC Considering the Effect of the Relative Humidity

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