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Zhang Z, Cui R, Jiang X, Yu C, Zhou Y. Effect of ionic groups on the morphology and transport properties in a novel perfluorinated ionomer containing sulfonic and phosphonic acid groups: a molecular dynamics study. Phys Chem Chem Phys 2024; 26:12806-12819. [PMID: 38619877 DOI: 10.1039/d4cp00962b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Combining the phosphonic acid group with the sulfonic acid group in PEMs has been shown to be an effective strategy for improving the fuel cell performance. However, the interplay of two different ionic groups and the resulting effect on the membrane properties have not been fully elucidated. Here, we used classical molecular dynamics simulation to investigate the morphologies, transport properties and effects of ionic groups in a novel perfluorinated PEM containing two ionic groups (PFSA-PFPA) in comparison to the corresponding homopolymers. Phase separations between hydrophilic and hydrophobic domains are confirmed in these PEMs and result from the evolution of water clusters formed around the ionic groups. The combination of both ionic groups brings a complicated morphological feature in PFSA-PFPA, with near-cylindrical aqueous domains of large length scales interconnected by tortuous domains of small sizes. And we found that the self-diffusion coefficients of water molecules are strongly related to morphologies, with the water transport in PFSA-PFPA lying between two analogous homopolymers. At the molecular level, we found that the sulfonic and phosphonic acid groups have distinct effects on the coordination behaviors and the dynamics of water molecules and hydronium ions. Strong electrostatic interactions lead to compact coordination structures and sluggish dynamics of hydronium ions around phosphonic acid groups, which determine the morphological evolution and transport properties in PFSA-PFPA. Our study affords insights into the relationship between molecular characteristics and transport properties bridged by phase-separated morphologies in a novel PEM containing both sulfonic acid and phosphonic acid groups, which deepens the understanding of the interplay between two ionic groups and may inspire the rational design of high-performance PEMs.
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Affiliation(s)
- Zongwei Zhang
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
| | - Rui Cui
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
| | - Xuesong Jiang
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
- Key Laboratory of Green and High-end Utilization of Salt Lake Resources, Chinese Academy of Sciences, China
| | - Chunyang Yu
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
- Key Laboratory of Green and High-end Utilization of Salt Lake Resources, Chinese Academy of Sciences, China
| | - Yongfeng Zhou
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
- Key Laboratory of Green and High-end Utilization of Salt Lake Resources, Chinese Academy of Sciences, China
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2
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Cui R, Li S, Yu C, Zhou Y. The Evolution of Hydrogen Bond Network in Nafion via Molecular Dynamics Simulation. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Affiliation(s)
- Rui Cui
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Shanlong Li
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Chunyang Yu
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yongfeng Zhou
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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3
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Maiti TK, Singh J, Maiti SK, Majhi J, Ahuja A, Singh M, Bandyopadhyay A, Manik G, Chattopadhyay S. Molecular dynamics simulations and experimental studies of the perfluorosulfonic acid-based composite membranes containing sulfonated graphene oxide for fuel cell applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Cui R, Li S, Yu C, Wang Y, Zhou Y. Understanding the mechanism of nitrogen transport in the perfluorinated sulfonic-acid hydrated membranes via molecular dynamics simulations. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Li W, Li F, Zhao Y, Liu C, Li Y, Yang H, Fan K, Zhang P, Shan Y, Sun L. Promotion of the oxygen evolution performance of Ni-Fe layered hydroxides via the introduction of a proton-transfer mediator anion. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1178-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Zhang G, Yang G, Li S, Shen Q, Wang H, Li Z, Zhou Y, Ye W. Effects of Hydration and Temperature on the Microstructure and Transport Properties of Nafion Polyelectrolyte Membrane: A Molecular Dynamics Simulation. MEMBRANES 2021; 11:695. [PMID: 34564512 PMCID: PMC8467011 DOI: 10.3390/membranes11090695] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/05/2021] [Accepted: 09/06/2021] [Indexed: 11/16/2022]
Abstract
To investigate the effects of temperature and hydration on the microstructure of polymer electrolyte membrane and the transport of water molecules and hydronium ions, molecular dynamics simulations are performed on Nafion 117 for a series of water contents at different temperatures. The interactions among the sulfonate groups, hydronium ions, and water molecules are studied according to the analysis of radial distribution functions and coordination numbers. The sizes and connectivity of water clusters are also discussed, and it is found that the hydration level plays a key role in the phase separation of the membrane. However, the effect of the temperature is slight. When the water content increases from 3.5 to 16, the size of water clusters in the membrane increases, and the clusters connect to each other to form continuous channels for diffusion of water molecules and hydronium ions. The diffusion coefficients are estimated by studying the mean square displacements. The results show that the diffusion of water molecules and hydronium ions are both enhanced by the increase of the temperature and hydration level. Furthermore, the diffusion coefficient of water molecules is always much larger than that of hydronium ions. However, the ratio of the diffusion coefficient of water molecules to that of hydronium ions decreases with the increase of water content.
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Affiliation(s)
- Guoling Zhang
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (G.Z.); (Q.S.); (H.W.); (Z.L.); (Y.Z.)
| | - Guogang Yang
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (G.Z.); (Q.S.); (H.W.); (Z.L.); (Y.Z.)
| | - Shian Li
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (G.Z.); (Q.S.); (H.W.); (Z.L.); (Y.Z.)
| | - Qiuwan Shen
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (G.Z.); (Q.S.); (H.W.); (Z.L.); (Y.Z.)
| | - Hao Wang
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (G.Z.); (Q.S.); (H.W.); (Z.L.); (Y.Z.)
| | - Zheng Li
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (G.Z.); (Q.S.); (H.W.); (Z.L.); (Y.Z.)
| | - Yang Zhou
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (G.Z.); (Q.S.); (H.W.); (Z.L.); (Y.Z.)
| | - Weiqiang Ye
- School of Marine Engineering, Guangzhou Maritime University, Guangzhou 510725, China;
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7
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Cha J. Morphological effect of side chain on H 3O + transfer inside polymer electrolyte membranes across polymeric chain via molecular dynamics simulation. Sci Rep 2020; 10:22014. [PMID: 33328487 PMCID: PMC7745029 DOI: 10.1038/s41598-020-77971-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 11/12/2020] [Indexed: 11/25/2022] Open
Abstract
Performance and durability of polymer electrolyte membrane are critical to fuel cell quality. As fuel cell vehicles become increasingly popular, membrane fundamentals must be understood in detail. Here, this study used molecular dynamic simulations to explore the morphological effects of perfluorosulfonic acid (PFSA)-based membranes on ionic conductivity. In particular, I developed an intuitive quantitative approach focusing principally on hydronium adsorbing to, and desorbing from, negatively charged sulfonate groups, while conventional ionic conductivity calculations featured the use of mean square displacements that included natural atomic vibrations. The results revealed that shorter side-chains caused more hydroniums to enter the conductive state, associated with higher ion conductivity. In addition, the hydronium path tracking showed that shorter side-chains allowed hydroniums to move among host groups, facilitating chain adsorption, in agreement with a mechanism suggested in earlier studies.
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Affiliation(s)
- JinHyeok Cha
- Institute of Fundamentals and Advanced Technology, Hyundai Motor Company, 37 Cheoldobangmulgwan-ro, Uiwang-si, Gyeonggi-do, 16082, Republic of Korea.
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8
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Primachenko ON, Marinenko EA, Odinokov AS, Kononova SV, Kulvelis YV, Lebedev VT. State of the art and prospects in the development of proton‐conducting perfluorinated membranes with short side chains: A review. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5191] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Oleg N. Primachenko
- Laboratory of synthesis of high temperature resistant polymers Institute of Macromolecular Compounds of Russian Academy of Sciences Saint Petersburg Russia
| | - Elena A. Marinenko
- Laboratory of synthesis of high temperature resistant polymers Institute of Macromolecular Compounds of Russian Academy of Sciences Saint Petersburg Russia
| | - Alexey S. Odinokov
- Laboratory of synthesis of high temperature resistant polymers Institute of Macromolecular Compounds of Russian Academy of Sciences Saint Petersburg Russia
- Russian Research Center of Applied Chemistry Saint Petersburg Russia
| | - Svetlana V. Kononova
- Laboratory of synthesis of high temperature resistant polymers Institute of Macromolecular Compounds of Russian Academy of Sciences Saint Petersburg Russia
| | - Yuri V. Kulvelis
- Neutron research department Petersburg Nuclear Physics Institute, NRC “Kurchatov Institute” Gatchina Russia
| | - Vasily T. Lebedev
- Neutron research department Petersburg Nuclear Physics Institute, NRC “Kurchatov Institute” Gatchina Russia
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9
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Lawler R, Caliendo C, Ju H, Kim JY, Lee SW, Jang SS. Effect of the Side-Chain Length in Perfluorinated Sulfonic and Phosphoric Acid-Based Membranes on Nanophase Segregation and Transport: A Molecular Dynamics Simulation Approach. J Phys Chem B 2020; 124:1571-1580. [PMID: 32026694 DOI: 10.1021/acs.jpcb.9b10408] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of side-chain length on the nanophase-segregated structure and transport in perfluorinated sulfonic acid (PFSA)-based and perfluorinated phosphoric acid (PFPA)-based membranes is investigated at 20 and 5 wt % water content conditions using a molecular dynamics simulation method. It is found using the pair correlation analysis that the longer side chain leads to more developed local water structures in the water phase at 20 wt % water content, observable in both membrane chemistries albeit more distinct in PFPA-based membranes. It is also confirmed from the structure factor analysis that large-scale nanophase segregation is enhanced with increasing side-chain length for PFPA membranes, whereas no significant change is observed at these scales for PFSA membranes. Next, it is revealed that the proton transport is increased by 0.004 S/cm in PFSA-based membranes with increasing side-chain length due to the enhanced vehicular and hopping mechanisms, whereas the proton transport in PFPA-based membranes is decreased by 0.002 S/cm despite improved nanophase segregation. As confirmed by the pair correlation function analysis, the diminished proton transport in PFPA-based membranes is attributed to the molecular association of phosphate groups with hydronium ions via hydrogen bond in the longer side-chain case, which is namely a hydronium-mediated bridge configuration. Such bridge configurations and correspondingly similar trends in proton transport are also observed at 5 wt % water content condition to a lesser extent. Our simulation study demonstrates that the proton transport is affected by the hydrogen-bonding network as well as by the nanophase segregation.
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Affiliation(s)
- Robin Lawler
- Computational NanoBio Technology Laboratory, School of Materials Science and Engineering , Georgia Institute of Technology , 771 Ferst Drive NW , Atlanta , Georgia 30332 , United States.,School of Chemical and Biomolecular Engineering , Georgia Institute of Technology , 311 Ferst Drive NW , Atlanta , Georgia 30332 , United States
| | - Charles Caliendo
- Computational NanoBio Technology Laboratory, School of Materials Science and Engineering , Georgia Institute of Technology , 771 Ferst Drive NW , Atlanta , Georgia 30332 , United States
| | - Hyunchul Ju
- Department of Mechanical Engineering , Inha University , 100 Inha-ro , Michuhol-gu, Incheon 22212 , Republic of Korea
| | - Jin Young Kim
- Center for Hydrogen Fuel Cell Research , Korea Institute of Science and Technology (KIST) , Seoul 02792 , Republic of Korea
| | - Seung Woo Lee
- G. W. Woodruff School of Mechanical Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States.,Strategic Energy Institute , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Seung Soon Jang
- Computational NanoBio Technology Laboratory, School of Materials Science and Engineering , Georgia Institute of Technology , 771 Ferst Drive NW , Atlanta , Georgia 30332 , United States.,Strategic Energy Institute , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States.,Institute for Electronics and Nanotechnology , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
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10
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Petrov AV, Murin IV. Electronic Structure of SO3H Functional Groups and Proton Mobility in Nafion and Aquivion Ionomer Membranes. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219030320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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12
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Mabuchi T, Tokumasu T. Relationship between Proton Transport and Morphology of Perfluorosulfonic Acid Membranes: A Reactive Molecular Dynamics Approach. J Phys Chem B 2018; 122:5922-5932. [DOI: 10.1021/acs.jpcb.8b02318] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Okuwaki K, Mochizuki Y, Doi H, Kawada S, Ozawa T, Yasuoka K. Theoretical analyses on water cluster structures in polymer electrolyte membrane by using dissipative particle dynamics simulations with fragment molecular orbital based effective parameters. RSC Adv 2018; 8:34582-34595. [PMID: 35548624 PMCID: PMC9086946 DOI: 10.1039/c8ra07428c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 10/01/2018] [Indexed: 12/04/2022] Open
Abstract
The mesoscopic structures of polymer electrolyte membrane (PEM) affect the performances of fuel cells. Nafion® with the Teflon® backbone has been the most widely used of all PEMs, but sulfonated poly-ether ether-ketone (SPEEK) having an aromatic backbone has drawn interest as an alternative to Nafion. In the present study, a series of dissipative particle dynamics (DPD) simulations were performed to compare Nafion and SPEEK. These PEM polymers were modeled by connected particles corresponding to the hydrophobic backbone and the hydrophilic moiety of sulfonic acid group. The water particle interacting with Nafion particles was prepared as well. The crucial interaction parameters among DPD particles were evaluated by a series of calculations based on the fragment molecular orbital (FMO) method in a non-empirical way (Okuwaki et al., J. Phys. Chem. B, 2018, 122, 338–347). Through the DPD simulations, the water and hydrophilic particles aggregated, forming cluster networks surrounded by the hydrophobic phase. The structural features of formed water clusters were investigated in detail. Furthermore, the differences in percolation behaviors between Nafion and SPEEK revealed much better connectivity among water clusters by Nafion. The present FMO-DPD simulation results were in good agreement with available experimental data. The mesoscopic structures of polymer electrolyte membrane (PEM) affect the performances of fuel cells.![]()
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Affiliation(s)
- Koji Okuwaki
- Department of Chemistry and Research Center for Smart Molecules
- Faculty of Science
- Rikkyo University
- Toshima-ku
- Japan
| | - Yuji Mochizuki
- Department of Chemistry and Research Center for Smart Molecules
- Faculty of Science
- Rikkyo University
- Toshima-ku
- Japan
| | - Hideo Doi
- Department of Chemistry and Research Center for Smart Molecules
- Faculty of Science
- Rikkyo University
- Toshima-ku
- Japan
| | - Shutaro Kawada
- Department of Chemistry and Research Center for Smart Molecules
- Faculty of Science
- Rikkyo University
- Toshima-ku
- Japan
| | | | - Kenji Yasuoka
- Department of Mechanical Engineering
- Keio University
- Yokohama 223-8522
- Japan
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14
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Berrod Q, Hanot S, Guillermo A, Mossa S, Lyonnard S. Water sub-diffusion in membranes for fuel cells. Sci Rep 2017; 7:8326. [PMID: 28827621 PMCID: PMC5567110 DOI: 10.1038/s41598-017-08746-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/12/2017] [Indexed: 11/09/2022] Open
Abstract
We investigate the dynamics of water confined in soft ionic nano-assemblies, an issue critical for a general understanding of the multi-scale structure-function interplay in advanced materials. We focus in particular on hydrated perfluoro-sulfonic acid compounds employed as electrolytes in fuel cells. These materials form phase-separated morphologies that show outstanding proton-conducting properties, directly related to the state and dynamics of the absorbed water. We have quantified water motion and ion transport by combining Quasi Elastic Neutron Scattering, Pulsed Field Gradient Nuclear Magnetic Resonance, and Molecular Dynamics computer simulation. Effective water and ion diffusion coefficients have been determined together with their variation upon hydration at the relevant atomic, nanoscopic and macroscopic scales, providing a complete picture of transport. We demonstrate that confinement at the nanoscale and direct interaction with the charged interfaces produce anomalous sub-diffusion, due to a heterogeneous space-dependent dynamics within the ionic nanochannels. This is irrespective of the details of the chemistry of the hydrophobic confining matrix, confirming the statistical significance of our conclusions. Our findings turn out to indicate interesting connections and possibilities of cross-fertilization with other domains, including biophysics. They also establish fruitful correspondences with advanced topics in statistical mechanics, resulting in new possibilities for the analysis of Neutron scattering data.
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Affiliation(s)
- Quentin Berrod
- LLB, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191, Gif-sur-Yvette, France
- Lawrence Berkeley National Laboratory, Energy Storage Group, 94720, Berkeley, USA
| | - Samuel Hanot
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS, 20156 - 38042, Grenoble, France
- Unité de Bioinformatique Structurale, Institut Pasteur, Paris, France
- UMR 3528, CNRS, Paris, France
| | - Armel Guillermo
- Univ. Grenoble Alpes, CEA, CNRS, INAC, SYMMES, F-38000, Grenoble, France
| | - Stefano Mossa
- Univ. Grenoble Alpes, CEA, CNRS, INAC, SYMMES, F-38000, Grenoble, France.
| | - Sandrine Lyonnard
- Univ. Grenoble Alpes, CEA, CNRS, INAC, SYMMES, F-38000, Grenoble, France.
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15
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Abstract
In this comprehensive review, recent progress and developments on perfluorinated sulfonic-acid (PFSA) membranes have been summarized on many key topics. Although quite well investigated for decades, PFSA ionomers' complex behavior, along with their key role in many emerging technologies, have presented significant scientific challenges but also helped create a unique cross-disciplinary research field to overcome such challenges. Research and progress on PFSAs, especially when considered with their applications, are at the forefront of bridging electrochemistry and polymer (physics), which have also opened up development of state-of-the-art in situ characterization techniques as well as multiphysics computation models. Topics reviewed stem from correlating the various physical (e.g., mechanical) and transport properties with morphology and structure across time and length scales. In addition, topics of recent interest such as structure/transport correlations and modeling, composite PFSA membranes, degradation phenomena, and PFSA thin films are presented. Throughout, the impact of PFSA chemistry and side-chain is also discussed to present a broader perspective.
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Affiliation(s)
- Ahmet Kusoglu
- Energy Conversion Group, Energy Technologies Area, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, MS70-108B, Berkeley, California 94720, United States
| | - Adam Z Weber
- Energy Conversion Group, Energy Technologies Area, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, MS70-108B, Berkeley, California 94720, United States
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16
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Akbari S, Mosavian MTH, Moosavi F, Ahmadpour A. Molecular dynamics simulation of Keggin HPA doped Nafion® 117 as a polymer electrolyte membrane. RSC Adv 2017. [DOI: 10.1039/c7ra05929a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Nafion®/heteropoly acid (HPA) composite membranes and the impact of the anionic charge of HPA on water and hydronium dynamics were investigated using molecular dynamics simulation.
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Affiliation(s)
- S. Akbari
- Chemical Engineering Department
- Faculty of Engineering
- Ferdowsi University of Mashhad
- Iran
| | - M. T. Hamed Mosavian
- Chemical Engineering Department
- Faculty of Engineering
- Ferdowsi University of Mashhad
- Iran
| | - F. Moosavi
- Department of Chemistry
- Faculty of Science
- Ferdowsi University of Mashhad
- Iran
| | - A. Ahmadpour
- Chemical Engineering Department
- Faculty of Engineering
- Ferdowsi University of Mashhad
- Iran
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17
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18
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Dos Santos L, Laberty-Robert C, Maréchal M, Perrot H, Sel O. Proton Diffusion Coefficient in Electrospun Hybrid Membranes by Electrochemical Impedance Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:9737-9741. [PMID: 26322533 DOI: 10.1021/acs.langmuir.5b02171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Electrochemical Impedance Spectroscopy (EIS) was, for the first time, used to estimate the global transverse proton diffusion coefficient, D(H+)(EHM), in electrospun hybrid conducting membranes (EHMs). In contrast to conventional impedance spectroscopy, EIS measurements were performed at room temperature with a liquid interface. In this configuration, the measure of the bulk proton transport is influenced by the kinetics of the transfer of proton at the solid/liquid interface. We demonstrated that the use of additives in the process of the membrane impacts the organization of the hydrophilic domains and also the proton transport. The D(H+)(EHM) is close to 1.10(-7) cm(2) s(-1) (± 0.1.10(-7) cm(2) s(-1)) for the EHMs without additive, whereas it is 4.10(-6) cm(2) s(-1) (± 0.4.10(-6) cm(2) s(-1)) for EHMs with additives.
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Affiliation(s)
- Leslie Dos Santos
- Sorbonne Université, UPMC Univ. Paris 06, UMR7574, Laboratoire de Chimie de la Matière Condensée de Paris, UPMC- UMR7574, Collège de France, 11, place Marcelin Berthelot, 75005 Paris, France
- Sorbonne Université, UPMC Univ. Paris 06, UMR 8235, Laboratoire Interfaces et Systèmes Electrochimiques, F-75005, Paris, France
- CNRS, UMR 8235, LISE, F-75005, Paris, France
| | - Christel Laberty-Robert
- Sorbonne Université, UPMC Univ. Paris 06, UMR7574, Laboratoire de Chimie de la Matière Condensée de Paris, UPMC- UMR7574, Collège de France, 11, place Marcelin Berthelot, 75005 Paris, France
| | - Manuel Maréchal
- Université Grenoble Alpes, CNRS/CEA-INAC-SPrAM, F-38000 Grenoble, France
| | - Hubert Perrot
- Sorbonne Université, UPMC Univ. Paris 06, UMR 8235, Laboratoire Interfaces et Systèmes Electrochimiques, F-75005, Paris, France
- CNRS, UMR 8235, LISE, F-75005, Paris, France
| | - Ozlem Sel
- Sorbonne Université, UPMC Univ. Paris 06, UMR 8235, Laboratoire Interfaces et Systèmes Electrochimiques, F-75005, Paris, France
- CNRS, UMR 8235, LISE, F-75005, Paris, France
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19
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Li J, Pan M, Tang H. Understanding short-side-chain perfluorinated sulfonic acid and its application for high temperature polymer electrolyte membrane fuel cells. RSC Adv 2014. [DOI: 10.1039/c3ra43735c] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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20
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More M, Sunda AP, Venkatnathan A. Polymer chain length, phosphoric acid doping and temperature dependence on structure and dynamics of an ABPBI [poly(2,5-benzimidazole)] polymer electrolyte membrane. RSC Adv 2014. [DOI: 10.1039/c4ra01421a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The random orientations of BI units and the presence of free rotation around the single bond which connects two monomeric BI segments lead to minimal possibility of π–π interactions.
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Affiliation(s)
- Minal More
- Department of Chemistry
- Indian Institute of Science Education and Research
- Pune-411008, India
| | - Anurag Prakash Sunda
- Chemistry and Physics of Materials Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
- Bangalore-560064, India
| | - Arun Venkatnathan
- Department of Chemistry
- Indian Institute of Science Education and Research
- Pune-411008, India
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21
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Ozmaian M, Naghdabadi R. Modeling and simulation of the water gradient within a Nafion membrane. Phys Chem Chem Phys 2014; 16:3173-86. [DOI: 10.1039/c3cp54015d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Sel O, To Thi Kim L, Debiemme-Chouvy C, Gabrielli C, Laberty-Robert C, Perrot H. Determination of the diffusion coefficient of protons in Nafion thin films by ac-electrogravimetry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13655-13660. [PMID: 24131383 DOI: 10.1021/la401453e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This letter deals with an adaptation of the ac-electrogravimetry technique to extract separately the dynamic properties of H(+) and water in Nafion nanometric thin films (average thickness of 400 nm). An original theoretical approach was developed to extract the representative parameters from ac-electrogravimetry data. The concentration change of the exchanged species and the diffusion coefficient of the protons in a Nafion nanometric thin film (D = 0.5 × 10(-6) cm(2) s(-1) at 0.3 V vs SCE) were estimated for the first time according to the applied potential. The conductivity value of Nafion thin films was calculated from the Nernst-Einstein equation using diffusion coefficients and concentration values extracted from ac-electrogravimetry data. The calculated conductivity results agree well with the experimental proton conductivity values of Nafion thin films.
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Affiliation(s)
- Ozlem Sel
- UPR 15 du CNRS, LISE , 4 place Jussieu, 75252 Paris, France
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Clark JK, Paddison SJ. Side Chain Flexibility in Perfluorosulfonic Acid Ionomers: An ab Initio Study. J Phys Chem A 2013; 117:10534-43. [DOI: 10.1021/jp407568d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey K. Clark
- Department of Chemical and
Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Stephen J. Paddison
- Department of Chemical and
Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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Xiao P, Li J, Tang H, Wang Z, Pan M. Physically stable and high performance Aquivion/ePTFE composite membrane for high temperature fuel cell application. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.04.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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