Article
Engineering, Environmental
C. F. Zinola
Summary: An analytical solution of the water mass balance equation considering diffusion and electroosmotic drag fluxes was obtained. The experimental results showed that the operating conditions significantly affected the performance of the fuel cell, and continuous water recycling could preserve the performance stability of the fuel cell.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Peter Berg, Philippe Nadon
Summary: A random pore-network model for polymer electrolyte membranes has been developed to couple the flow of protons and water with membrane swelling effectively. By computing macroscopic membrane properties and comparing them with experimental data, the model has shown favorable results and highlighted the significance of accurately describing proton diffusion in PEM nanopores.
Article
Biochemical Research Methods
Kevin Krause, Marine Garcia, Dominique Michau, Gerald Clisson, Brant Billinghurst, Jean-Luc Battaglia, Stephane Chevalier
Summary: Polymer electrolyte membrane (PEM) electrolyzers are developed as a renewable energy storage system for producing high purity hydrogen fuel through electrochemical water splitting. However, the internal ion transport mechanisms of PEM are not fully understood. This study presents a semi-transparent microfluidic PEM electrolyzer that allows characterization of PEM hydration during operation using synchrotron Fourier-transform infrared (FTIR) spectroscopy. The results show that mass transport driven cell failure and membrane dehydration can be provoked by reactant starving flow rates, while higher operating temperatures improve membrane hydration stability by increasing water uptake. These findings prove the feasibility of using IR techniques for studying membrane hydration.
Article
Chemistry, Multidisciplinary
Andrew R. Crothers, Ahmet Kusoglu, Clayton J. Radke, Adam Z. Weber
Summary: This study uses simulations and theory to investigate the role of mesoscale network on water, proton, and electrokinetic transport in perfluorinated sulfonic acid membranes. Results show that the size of hydrophilic domains affects the distribution of microscale coefficients for different transport modes and mediates nonuniform transport of species. Local electrokinetic flows induced by the distribution of transport properties across the network couple water and proton transport.
Article
Electrochemistry
Agate Martin, Patrick Trinke, Boris Bensmann, Richard Hanke-Rauschenbach
Summary: This study investigates the hydrogen crossover of PEMWE cells using a thin Nafion 212 membrane. The results show that the hydrogen crossover flux generally increases with increasing current density, but flattens in the high current regime. Considering hydrogen diffusion as the single transport mechanism is insufficient to explain these data, and the electro-osmotic drag of water containing dissolved hydrogen should be considered additionally.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Environmental
Xiaojing Cheng, Jiabin You, Shuiyun Shen, Guanghua Wei, Xiaohui Yan, Chao Wang, Junliang Zhang
Summary: This study successfully regulated the nanoscale distribution of the Nafion film using polyvinyl alcohol (PVA) as a sacrificial pore-forming agent, which reduced the oxygen transport resistance and improved the performance of fuel cells.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Yali Li, Qinglin Wen, Jiaqi Qin, Siyi Zou, Fandi Ning, Chuang Bai, Saifei Pan, Hanqing Jin, Pengpeng Xu, Min Shen, YuJiang Song, Xiaochun Zhou
Summary: In this study, a high-efficient, contamination-free, and low-consumption nanoimprint method was developed to prepare composite proton exchange membranes (PEMs) with ordered Nafion arrays. The method significantly improves the performance of the composite PEMs and promotes the development of ordered membrane electrode assemblies (MEAs) in various applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Horacio R. Corti, Liliana Trevani
Summary: The electro-osmotic drag coefficient of water-methanol mixtures through Nafion 117 membranes was measured at different temperatures using a capillary cell. The drag coefficient for pure methanol was found to be 40% higher than that of water, and the drag coefficients of the mixtures showed non-linear behavior. Using pure methanol instead of methanol aqueous solutions can minimize methanol crossover in DMFCs.
FRONTIERS IN ENERGY RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Wenhui Zhao, Guangtong Xu, Wenyan Dong, Yiwei Zhang, Zipeng Zhao, Limei Qiu, Juncai Dong
Summary: Proton exchange membrane fuel cells (PEMFCs) show great potential as efficient and clean energy conversion devices, but the sluggish kinetics of the oxygen reduction reaction (ORR) and the vulnerability of ORR catalysts under harsh conditions hinder their practical development. In situ characterization techniques provide valuable insights into the ORR mechanism and failure mechanisms of ORR catalysts, guiding the development of high-performance catalysts with improved activity and stability.
Article
Engineering, Chemical
A. L. Rangel-Cardenas, S. J. Picken, G. J. M. Koper
Summary: The role of interfacial resistance to water transport in a system geometry similar to a PEM fuel cell was investigated in this study. Water sorption kinetics in carbon-supported Nafion thin-films was studied at different relative humidities and membrane thicknesses. Anomalous water sorption kinetics were observed, characterized by a delayed onset to Fickian behavior and two different time scales. The presence of two regimes with different diffusion coefficients, attributed to interfacial and bulk diffusivities, can simulate the anomalous behavior in sorption curves.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Thermodynamics
Junjie Zhao, Zhengkai Tu, Siew Hwa Chan
Summary: Understanding internal water distribution is crucial for developing high-performance proton exchange membrane fuel cells (PEMFCs). This study divided the cathode flow field into 9 areas and measured relative humidity in real time using microsensors. The results showed that relative humidity significantly affects the internal resistance of PEMFCs, and strategies like increasing pressure and cathode humidification can alleviate related issues. Additionally, the degree of corrosion in the catalyst's carbon support is closely related to water concentration in the cathode, highlighting the importance of water management downstream of the flow field.
Article
Green & Sustainable Science & Technology
Mahmut Bayramoglu, Emine Sena Kazan, Zeynep Cigeroglu, Yasser Vasseghian
Summary: The direct methanol fuel cell (DMFC) system is an important clean and sustainable energy generation system. However, the efficiency of the system is lower than expected due to the incomplete reaction of methanol electrooxidation. This study focused on evaluating critical parameters and investigating the properties of reaction intermediates under operating conditions.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Engineering, Aerospace
Camilo Riano-Rios, Riccardo Bevilacqua, Warren E. Dixon
Summary: This paper introduces a differential atmospheric drag-based control algorithm for rendezvous with a noncooperative target in Low Earth Orbit. The design of an adaptive controller addresses the challenge of using a differential input that requires knowledge of physical parameters. Numerical simulations validate the controller design and evaluate its performance under nonlinearities and input saturation.
Article
Environmental Sciences
Mingwei Liu, Liqin Zeng, Linjian Wu, Gang Chen, Lilong Shen, Erdi Abi
Summary: The dynamic characteristics of flow around piles have a direct impact on the force distribution of the flow on piles, which is crucial for calculating the flow load on hydraulic structures. Currently, model tests and numerical simulations are the main methods employed to study the flow characteristics. However, there are issues with scale effects and accuracy in model tests, and inherent problems in numerical simulations such as determining medium parameters, mesh division, and boundary conditions, which limit the ability to reflect the actual interaction between water flow and piles. This paper presents a field test system for measuring hydrodynamic pressures on the surface of piles under superhigh Reynolds numbers. The developed system and analysis methods proved effective in obtaining more accurate distribution of pile surface hydrodynamic pressure.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Energy & Fuels
Diankai Qiu, Xiangyang Zhou, Minxue Chen, Zhutian Xu, Linfa Peng
Summary: Air-cooled proton exchange membrane fuel cells (PEMFCs) have the advantages of simple system, low parasitic power, and low cost. However, the uneven distribution of internal reaction state limits their performance and stability. In this study, a PCB test board is designed to observe the temperature and current density of the cells. Optimization proposals for controlling air-cooled PEMFCs are given based on experimental exploration of hydrogen pulsing interval, hydrogen supply mode, fan configuration, and air inlet speed.
Article
Electrochemistry
P. Sistat, P. Huguet, B. Ruiz, G. Pourcelly, S. A. Mareev, V. V. Nikonenko
ELECTROCHIMICA ACTA
(2015)
Article
Engineering, Chemical
B. Martinez-Lopez, P. Huguet, N. Gontard, S. Peyron
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2016)
Article
Chemistry, Physical
M. Porozhnyy, P. Huguet, M. Cretin, E. Safronova, V. Nikonenko
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2016)
Article
Chemistry, Physical
Asma Nakhli, Marie Goletti Nguemtchouin Mbouga, Manel Bergaoui, Mohamed Khalfaoui, Marc Cretin, Patrice Huguet
JOURNAL OF MOLECULAR LIQUIDS
(2017)
Article
Chemistry, Physical
Zhe Peng, Vasilica Badets, Patrice Huguet, Arnaud Morin, Pascal Schott, Thi Bich Hue Tran, Mikhael Porozhnyy, Victor Nikonenko, Stefano Deabate
JOURNAL OF POWER SOURCES
(2017)
Article
Chemistry, Organic
M. V. Porozhnyy, V. V. Sarapulova, N. D. Pismenskaya, P. Huguet, S. Deabate, V. V. Nikonenko
PETROLEUM CHEMISTRY
(2017)
Article
Chemistry, Physical
Asma Nakhli, Marie Goletti Nguemtchouin Mbouga, Manel Bergaoui, Mohamed Khalfaoui, Marc Cretin, Patrice Huguet
JOURNAL OF MOLECULAR LIQUIDS
(2018)
Article
Chemistry, Multidisciplinary
Razik Djara, Yaovi Holade, Abdelhafid Merzouki, Marie-Agnes Lacour, Nathalie Masquelez, Valerie Flaud, Didier Cot, Bertrand Rebiere, Aria van der Lee, Julien Cambedouzou, Patrice Huguet, Sophie Tingry, David Cornu
FRONTIERS IN CHEMISTRY
(2020)
Article
Chemistry, Physical
Feihong Ren, Zhendong Li, Yun Zhu, Patrice Huguet, Stefano Deabate, Deyu Wang, Zhe Peng
Article
Electrochemistry
Thi Bich Hue Tran, Patrice Huguet, Arnaud Morin, Mike Robitzer, Stefano Deabate
Summary: The study investigates the influence of various factors such as working temperature, current density, and gas feed channel geometry on the water content and distribution within the Nafion membrane of a fuel cell. The results show that membrane dehydration is influenced by factors such as pressure losses, temperature, and current density. Different geometries of the gas feed channel also impact water distribution, leading to variations in cell performance. Ultimately, the interplay between membrane hydration and water repartition plays a significant role in determining the electrochemical behavior of the fuel cell.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
M. V. Porozhnyy, S. A. Shkirskaya, D. Yu. Butylskii, V. V. Dotsenko, E. Yu. Safronova, A. B. Yaroslavtsev, S. Deabate, P. Huguet, V. V. Nikonenko
Summary: The introduction of nanoparticles into membranes can significantly enhance their performance in various applications. This study investigates the effects of surface functionalization of nanoparticles on membrane properties, demonstrating that doping with nanoparticles can increase membrane conductivity and permselectivity, with the impact dependent on the surface charge density and size of the nanoparticles.
ELECTROCHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Feihong Ren, Zhendong Li, Jiahe Chen, Patrice Huguet, Zhe Peng, Stefano Deabate
Summary: The latest developments in localized high-concentration electrolytes offer insights into stabilizing high-energy-density lithium metal batteries. The amount of diluent has an unexpected effect on the solvation structures of the electrolytes, and a moderately diluted localized high-concentration electrolyte shows the best Coulombic efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Electrochemistry
Thi B. H. Tran, Patrice Huguet, Arnaud Morin, Mike Robitzer, Stefano Deabate
Summary: To understand the electrochemical behavior of polymer electrolyte membrane fuel cells, it is crucial to measure the membrane water content. In this study, operando mu-Raman spectroscopy was used to investigate the water content of Nafion(R) membranes in fuel cells, and the effects of operating temperature and current density on water content and distribution were examined.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Feihong Ren, Kun Qi, Jiefeng Liu, Patrice Huguet, Damien Voiry, Stefano Deabate
Summary: Li-based batteries, commonly used in electric vehicles and portable electronic devices, pose an environmental risk when discarded. To explore alternative recycling methods, this study demonstrates the photochemical conversion of usual carbonate-based electrolytes into a highly active and selective catalyst for CO2 reduction. The resulting material, obtained by depositing LiPF6 solutions on a Cu substrate and irradiating with a 1.88 eV laser, exhibits a faradic efficiency of 46.7% for CH4 during electrochemical reduction of CO2, maintained above 40% for at least 100 h.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Razik Djara, Yaovi Holade, Abdelhafid Merzouki, Nathalie Masquelez, Didier Cot, Bertrand Rebiere, Eddy Petit, Patrice Huguet, Christine Canaff, Sophie Morisset, Teko W. Napporn, David Cornu, Sophie Tingry
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
