Numerical optimization of bipolar plates and gas diffusion electrodes for PBI-based PEM fuel cells

Grigoriev, S.A.; Kalinnikov, A. A.; Кулешов, Н. В.; Millet, Pierre

doi:10.1016/j.ijhydene.2012.12.021

Cited by 24 publications

(10 citation statements)

References 21 publications

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“…They also developed a neural networkbased model and studied the effect of operating temperature on high-temperature PEM fuel cells [29]. Grigoriev et al [30] reported a mathematical model of high-temperature PEM fuel cells, with H 3 PO 4 -doped polybenzimidazole (PBI) being used as the solid polymer electrolyte, and they conducted geometry optimization for important cell components.…”

Section: Introductionmentioning

confidence: 99%

Effects of geometry/dimensions of gas flow channels and operating conditions on high-temperature PEM fuel cells

Liu

Hartz

et al. 2014

Int J Energy Environ Eng

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In order to accomplish the objective of studying and optimizing the flow channel geometries and dimensions for high-temperature proton-exchange-membrane (PEM) fuel cells (with operating temperatures above 120°C), a mathematical model has been developed in this work. As the major step of the modeling, the average concentrations of gas species in bulk flows as well as in the layers of electrodes are calculated through mass transfer analysis in one-dimensional direction normal to the membrane-electrodes layers. Therefore, the concentration and activation polarizations are simulated with much less computational work compared to a three-dimensional numerical model. The ohmic loss is taken into consideration through analysis of a representative network circuit simulating the electron and proton conduction in the elements of electrodes and electrolyte, respectively. The simulated results for high-temperature PEM fuel cells were compared with experimental results from literature. The results from the simulation and experimental tests showed good agreement, which validated the mathematical model. As the model requires less computational work, it was used to analyze a large number of cases with different gas flow channel dimensions and operating conditions, and optimization to the dimensions of channels and ribs was accomplished.

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Section: Introductionmentioning

confidence: 99%

Effects of geometry/dimensions of gas flow channels and operating conditions on high-temperature PEM fuel cells

Liu

Hartz

et al. 2014

Int J Energy Environ Eng

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“…Since the anode and cathode channel of the PEMFC used in the experiment are perpendicular to each other, the air and fuel flow directions are cross-flowing, and the air composition on the cathode side corresponding to different anode channel will change along the air flow direction. Therefore, the modeling location in this paper is chosen to be in the mid-profile of the first anode channel at the air inlet [13]. To simplify the model, the air composition at the outer surface of the cathode diffusion layer is assumed to be the same as at the air inlet [14].The model contains six domains: anode channel, anode gas diffusion layer(an_GDL), anode catalyst layer(an_CL), proton exchange membrane(PEM), cathode catalyst layer(ca_CL), and cathode gas diffusion layer(ca_GDL) as shown in Figure 1.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Where E0 is the theoretical reversible voltage which can be calculated from the Nernst equation [13] Anode local current density ia (Concentration-dependent Butler-Vo lmer equation)…”

Section: Fig1 Two-dimensional Section Of the Modeling Area 21 Electrochemical Modelmentioning

confidence: 99%

Modeling And Optimization Study of PEMFC Fueled With Ammonia Reforming Gas

Zhao¹,

Liang²,

Liang³

2021

Preprint

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The storage of high-purity hydrogen has been a technical challenge limiting the large-scale application of fuel cells. Ammonia is an ideal hydrogen storage carrier with a storage mass density of up to 17 wt% and can be easily liquefied for storage and transportation, but ammonia requires complex separation equipment to re-generate high-purity hydrogen, which greatly reduces its advantages in hydrogen storage. Therefore, the development of direct ammonia reforming gas fuel cells, which can avoid complicated pure hydrogen separation equipment, has a very meaningful impact and can greatly expand the application of fuel cells. In this paper, we study the modeling simulation of ammonia reforming gas-fueled proton exchange membrane fuel cell (PEMFC) based on the preliminary experiments, and the concentration-dependent Butler-Volmer electrochemical model is used to simulate the ammonia reforming gas-fueled PEMFC. Firstly, the concentration-dependent Butler-Volmer electrochemical model was improved by adding a correction factor for the concentration difference polarization based on the characteristics of the experimental data to obtain a correction factor of 1.65 based on the experimental data; secondly, the effect of the anode channel length on the fuel cell performance was investigated. The results show that: firstly, the improved concentration-dependent Butler-Volmer electrochemical model can better match the experimental results; secondly, the anode channel length has less effect on the maximum power density and hydrogen concentration in the exhaust gas, and the current density gradient increases with decreasing anode channel length, but the fuel flow resistance decreases. The results of the study can provide a reference for the simulation study of PEMFC using ammonia reforming gas as fuel.

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“…The optimum rib width is determined mainly by competition between diffusion and current conductivity in a gas diffusion electrode. 18 Therefore, it can be confirmed that the improvement of electrode materials and the optimization of flow field structure have played a vital role in improving the performance of fuel cell.…”

Section: Introductionmentioning

confidence: 99%

Combination effects of flow field structure and assembly force on performance of high temperature proton exchange membrane fuel cells

Zhang

et al. 2021

Int J Energy Res

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In this work, a three-dimensional, steady state model was developed by combining mechanical equations, Navier-stokes equation, Maxwell-Stefan equation, and Butler-Volmer equation. This model was used to investigate the influences of flow field structure and assembly force on porosity distribution in gas diffusion layer (GDL), species distribution in GDL, and current density distribution in GDL and membrane by extracting uneven porosity in the GDL from mechanical calculation equation to put in mass transfer calculation and electrochemical calculation equation as the known data. The optimum assembly prestress and optimum flow field structure were achieved. The results show combined effect of the assembly force and flow field makes the uneven porosity distribution and remarkable lateral current in the GDL; the channel width/ rib width ratio of flow field has significant effects on the performance of the high temperature proton exchange membrane fuel cells (HT-PEMFC). These results provide the potential to promote the performance and application of HT-PEMFC.

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Numerical optimization of bipolar plates and gas diffusion electrodes for PBI-based PEM fuel cells

Cited by 24 publications

References 21 publications

Effects of geometry/dimensions of gas flow channels and operating conditions on high-temperature PEM fuel cells

Effects of geometry/dimensions of gas flow channels and operating conditions on high-temperature PEM fuel cells

Modeling And Optimization Study of PEMFC Fueled With Ammonia Reforming Gas

Combination effects of flow field structure and assembly force on performance of high temperature proton exchange membrane fuel cells

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