Performance Comparison of Proton Exchange Membrane Fuel Cells with Nafion and Aquivion Perfluorosulfonic Acids with Different Equivalent Weights as the Electrode Binders

Li, Ting; Shen, Jiabin; Chen, Guang‐Ying; Guo, Shaoyun; Xie, Guangyou

doi:10.1021/acsomega.0c02110

Cited by 42 publications

(29 citation statements)

References 33 publications

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“…As the water sorption isotherm was not known and the relationship from Springer [5] was used for the simulations, the uncertainty may be in the use of this relationship. However, the obtained value is within physical bounds for SSC-PFSA ionomers [56][57][58].…”

Section: Ionic Conductivitymentioning

confidence: 50%

Parameter Identification of a Quasi-3D PEM Fuel Cell Model by Numerical Optimization

2021

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Polymer electrolyte membrane fuel cells (PEMFCs) supplied with green hydrogen from renewable sources are a promising technology for carbon dioxide-free energy conversion. Many mathematical models to describe and understand the internal processes have been developed to design more powerful and efficient PEMFCs. Parameterizing such models is challenging, but indispensable to predict the species transport and electrochemical conversion accurately. Many material parameters are unknown, or the measurement methods required to determine their values are expensive, time-consuming, and destructive. This work shows the parameterization of a quasi-3D PEMFC model using measurements from a stack test stand and numerical optimization algorithms. Differential evolution and the Nelder–Mead simplex algorithm were used to optimize eight material parameters of the membrane, cathode catalyst layer (CCL), and gas diffusion layer (GDL). Measurements with different operating temperatures and gas inlet pressures were available for optimization and validation. Due to the low operating temperature of the stack, special attention was paid to the temperature dependent terms in the governing equations. Simulations with optimized parameters predicted the steady-state and transient behavior of the stack well. Therefore, valuable data for the characterization of the membrane, the CCL and GDL was created that can be used for more detailed CFD simulations in the future.

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Section: Ionic Conductivitymentioning

confidence: 50%

Parameter Identification of a Quasi-3D PEM Fuel Cell Model by Numerical Optimization

2021

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“…14 The equivalent weight (EW) of the ionomers is considered another factor affecting proton transport. 15 Smallangle…”

Section: Introductionmentioning

confidence: 99%

Mesoscale hydrated morphology of perfluorosulfonic acid membranes

Wang

Chen

et al. 2022

J of Applied Polymer Sci

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Fuel cells are expected to play an important role in global carbon neutralization and future social development with high conversion efficiency and zero emissions. The core of the fuel cell is the proton exchange membrane (PEM).However, the unclear of the proton transport mechanism in PEMs limits the development of membranes with improved performance. Perfluorosulfonic acid (PFSA) membranes are currently the most widely used type of PEM, and exhibit varying proton transport capabilities with various chemical structures. In this study, the hydration morphology of several PFSA membranes was studied using dissipative particle dynamics. The result shows that under low water content the hydrophilic and hydrophobic phases separated and the water clusters are relatively isolated. The increased water content formed hydrophilic

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“…The most used ionomer is Nafion ® , a long-side-chain perfluorosulfonic acid, considered as the benchmark for several kinds of applications ranging from energy production to sensors. A wide literature is available about the use of Nafion ® in both membranes and catalytic ink preparation reporting the use of the pristine polymer or composite with inorganic and organic materials [18][19][20][21]. With the aim of overcoming some limitations of Nafion ® when it operates in more drastic conditions, such as high temperature and low relative humidity, a short-side-chain ionomer can be used.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion® Ionomer

et al. 2021

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Perfluorinated sulfonic acid (PFSA) polymers such as Nafion® are widely used for both electrolyte membranes and ionomers in the catalytic layer of membrane-electrode assemblies (MEAs) because of their high protonic conductivity, σH, as well as chemical and thermal stability. The use of PFSA polymers with shorter side chains and lower equivalent weight (EW) than Nafion®, such as Aquivion® PFSA ionomers, is a valid approach to improve fuel cell performance and stability under drastic operative conditions such as those related to automotive applications. In this context, it is necessary to optimize the composition of the catalytic ink, according to the different ionomer characteristics. In this work, the influence of the ionomer amount in the catalytic layer was studied, considering the dispersing agent used to prepare the electrode (water or ethanol). Electrochemical studies were carried out in a single cell in the presence of H2-air, at intermediate temperatures (80–95 °C), low pressure, and reduced humidity ((50% RH). %). The best fuel cell performance was found for 26 wt.% Aquivion® at the electrodes using ethanol for the ink preparation, associated to a maximum catalyst utilization.

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Performance Comparison of Proton Exchange Membrane Fuel Cells with Nafion and Aquivion Perfluorosulfonic Acids with Different Equivalent Weights as the Electrode Binders

Cited by 42 publications

References 33 publications

Parameter Identification of a Quasi-3D PEM Fuel Cell Model by Numerical Optimization

Parameter Identification of a Quasi-3D PEM Fuel Cell Model by Numerical Optimization

Mesoscale hydrated morphology of perfluorosulfonic acid membranes

Influence of Ionomer Content in the Catalytic Layer of MEAs Based on Aquivion® Ionomer

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