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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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Kodir A, Woo S, Shin SH, So S, Man Yu D, Lee H, Shin D, Lee JY, Park SH, Bae B. Poly(p-phenylene)-based membranes with cerium for chemically durable polymer electrolyte fuel cell membranes. Heliyon 2024; 10:e26680. [PMID: 38434046 PMCID: PMC10906415 DOI: 10.1016/j.heliyon.2024.e26680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 01/27/2024] [Accepted: 02/17/2024] [Indexed: 03/05/2024] Open
Abstract
A poly(p-phenylene)-based multiblock polymer is developed with an oligomeric chain extender and cerium (CE-sPP-PPES + Ce3+) to realize better performance and durability in proton exchange membrane fuel cells. The membrane performance is evaluated in single cells at 80 °C and at 100% and 50% relative humidity (RH). The accelerated stability test is conducted 90 °C and 30% RH, during which linear sweep voltammetry and hydrogen permeation detection are monitored periodically. Results demonstrate that the proton conductivity of the pristine hydrocarbon membranes is superior to that of PFSA membranes, and the hydrogen crossover is significantly lower. In addition, a composite membrane containing cerium performs similarly to a pristine membrane, particularly at low RH levels. Adding cerium to CE-sPP-PPES + Ce3+ membranes improves their chemical durability significantly, with an open circuit voltage decay rate of only 89 μV/h for 1000 h. The hydrogen crossover is maintained across accelerated stability tests, as confirmed by hydrogen detection and crossover current density. The short-circuit resistance indicates that membrane thinning is less likely to occur. Collectively, these results demonstrate that a hydrocarbon membrane with cerium is a potential alternative for fuel cell applications.
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Affiliation(s)
- Abdul Kodir
- Department of Renewable Energy Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, South Korea
- Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea
| | - Seunghee Woo
- Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea
| | - Sang-Hun Shin
- Energy Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, South Korea
| | - Soonyong So
- Energy Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, South Korea
| | - Duk Man Yu
- Energy Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, South Korea
| | - Hyejin Lee
- Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea
| | - Dongwon Shin
- Department of Renewable Energy Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, South Korea
- Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea
| | - Jang Yong Lee
- Energy Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, South Korea
| | - Seok-Hee Park
- Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea
| | - Byungchan Bae
- Department of Renewable Energy Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, South Korea
- Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea
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3
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Plazanet M, Morfin I, Honkimäki V, Buslaps T, Petrillo C, Sacchetti F. Hydrogen-bond network distortion of water in the soft confinement of Nafion membrane. J Chem Phys 2021; 154:244503. [PMID: 34241357 DOI: 10.1063/5.0049625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A Compton spectroscopy investigation is carried out in hydrated Nafion membranes, enabling identification of distortions in the hydrogen-bond distribution of the polymer hydrating water by means of the subtle changes reflected by the Compton profiles. Indeed, deformations of the Compton profiles are observed when varying hydration, and two different bonding kinds are associated with the water molecules: at low hydration, water surrounds the sulfonic groups, while on increasing hydration, water molecules occupy the interstitial cavities formed upon swelling of the membrane. The analysis is proposed in terms of averaged OH bond length variation. A sizable contraction of the OH distance is observed at low hydration (∼0.09 Å), while at higher hydration levels, the contraction is smaller (∼0.02 Å) and the OH bond length is closer to bulk water. An evaluation of the electron kinetic energy indicates that the spatial changes associated with the water distribution correspond to a consistent binding energy increase. Distinct temperature dependences of each water population are observed, which can be straightly related to water desorption into ice on cooling below the freezing point.
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Affiliation(s)
- M Plazanet
- LIPhy, University Grenoble-Alpes and CNRS, UMR5588 Grenoble, France
| | - I Morfin
- LIPhy, University Grenoble-Alpes and CNRS, UMR5588 Grenoble, France
| | | | | | - C Petrillo
- Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, I-06123 Perugia, Italy
| | - F Sacchetti
- Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, I-06123 Perugia, Italy
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4
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5
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Katzenberg A, Mukherjee D, Dudenas PJ, Okamoto Y, Kusoglu A, Modestino MA. Dynamic Emergence of Nanostructure and Transport Properties in Perfluorinated Sulfonic Acid Ionomers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01213] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Adlai Katzenberg
- Tandon School of Engineering, New York University, Brooklyn, New York 11201, United States
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Debdyuti Mukherjee
- Tandon School of Engineering, New York University, Brooklyn, New York 11201, United States
| | - Peter J. Dudenas
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Yoshiyuki Okamoto
- Tandon School of Engineering, New York University, Brooklyn, New York 11201, United States
| | - Ahmet Kusoglu
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Miguel A. Modestino
- Tandon School of Engineering, New York University, Brooklyn, New York 11201, United States
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6
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Schiavone MM, Iwase H, Takata SI, Radulescu A. The Multilevel Structure of Sulfonated Syndiotactic-Polystyrene Model Polyelectrolyte Membranes Resolved by Extended Q-Range Contrast Variation SANS. MEMBRANES 2019; 9:E136. [PMID: 31652905 PMCID: PMC6918273 DOI: 10.3390/membranes9110136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 11/17/2022]
Abstract
Membranes based on sulfonated synditoactic polystyrene (s-sPS) were thoroughly characterized by contrast variation small-angle neutron scattering (SANS) over a wide Q-range in dry and hydrated states. Following special sulfonation and treatment procedures, s-sPS is an attractive material for fuel cells and energy storage applications. The film samples were prepared by solid-state sulfonation, resulting in uniform sulfonation of only the amorphous phase while preserving the crystallinity of the membrane. Fullerenes, which improve the resistance to oxidation decomposition, were incorporated in the membranes. The fullerenes seem to be chiefly located in the amorphous regions of the samples, and do not influence the formation and evolution of the morphologies in the polymer films, as no significant differences were observed in the SANS patterns compared to the fullerenes-free s-sPS membranes, which were investigated in a previous study. The use of uniaxially deformed film samples, and neutron contrast variation allowed for the identification and characterization of different structural levels with sizes between nm and μm, which form and evolve in both the dry and hydrated states. The scattering length density of the crystalline regions was varied using the guest exchange procedure between different toluene isotopologues incorporated into the sPS lattice, while the variation of the scattering properties of the hydrated amorphous regions was achieved using different H2O/D2O mixtures. Due to the deformation of the films, the scattering characteristics of different structures can be distinguished on specific detection sectors and at different detection distances after the sample, depending on their size and orientation.
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Affiliation(s)
- Maria-Maddalena Schiavone
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, 85747 Garching, Germany.
| | - Hiroki Iwase
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan.
| | - Shin-Ichi Takata
- Materials and Life Science Division, Japan Proton Accelerator Research Complex (JPARC), Tokai, Ibaraki 319-1195, Japan.
| | - Aurel Radulescu
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, 85747 Garching, Germany.
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7
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Morphological changes of hydrophobic matrix and hydrophilic ionomers in water-swollen perfluorinated sulfonic acid membranes detected using small-angle X-ray scattering. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121699] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Hammer R, Schönhoff M, Hansen MR. Comprehensive Picture of Water Dynamics in Nafion Membranes at Different Levels of Hydration. J Phys Chem B 2019; 123:8313-8324. [PMID: 31508959 DOI: 10.1021/acs.jpcb.9b05093] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1H NMR spectroscopy is employed to study the long-range (diffusion) and short-range (relaxation) motions of water in the hydrophilic channels of Nafion at different stages of hydration, λwater. From Bloembergen, Purcell, and Pound analysis of the temperature-dependent 1H spin-lattice relaxation rates, the coexistence of two motional modes for λwater < 9 was observed, which can be attributed to the nonfreezing behavior of water molecules. At higher hydration levels, a clear transition between two different motional modes was detected associated with the freezing of bulk water. The hydration-level-dependent diffusion 1H NMR studies showed a steep increase in diffusion coefficients at 6 ≤ λwater ≤ 9 followed by a linear increase with the increasing hydration level (λwater ≥ 12). Taken together the correlation of long- and short-range motion studies allowed us to establish a comprehensive picture of the hydration shell formation for the sulfonic acid groups in Nafion dependent on λwater that can be divided into three characteristic regions. These include the formation of the first hydration shell at λwater ≈ 3 (region I), the second hydration shell at λwater ≈ 8 (region II), and finally (iii) the presence of bulk water above λwater ≥ 10 (region III).
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Affiliation(s)
- Regine Hammer
- Institute for Physical Chemistry , Westfälische Wilhelms-Universität , Corrensstr. 28/30 , 48149 Münster , Germany
| | - Monika Schönhoff
- Institute for Physical Chemistry , Westfälische Wilhelms-Universität , Corrensstr. 28/30 , 48149 Münster , Germany
| | - Michael Ryan Hansen
- Institute for Physical Chemistry , Westfälische Wilhelms-Universität , Corrensstr. 28/30 , 48149 Münster , Germany
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9
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Balwani A, Faraone A, Davis EM. Impact of Nanoparticles on the Segmental and Swelling Dynamics of Ionomer Nanocomposite Membranes. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02189] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Apoorv Balwani
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Antonio Faraone
- National Institute
of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20878, United States
| | - Eric M. Davis
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
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10
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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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11
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Narayanan T, Wacklin H, Konovalov O, Lund R. Recent applications of synchrotron radiation and neutrons in the study of soft matter. CRYSTALLOGR REV 2017. [DOI: 10.1080/0889311x.2016.1277212] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Hanna Wacklin
- European Spallation Source ERIC, Lund, Sweden
- Physical Chemistry, Lund University, Lund, Sweden
| | | | - Reidar Lund
- Department of Chemistry, University of Oslo, Blindern, Oslo, Norway
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12
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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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13
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Nguyen HD, Assumma L, Judeinstein P, Mercier R, Porcar L, Jestin J, Iojoiu C, Lyonnard S. Controlling Microstructure-Transport Interplay in Highly Phase-Separated Perfluorosulfonated Aromatic Multiblock Ionomers via Molecular Architecture Design. ACS APPLIED MATERIALS & INTERFACES 2017; 9:1671-1683. [PMID: 27966862 DOI: 10.1021/acsami.6b12764] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Proton-conducting multiblock polysulfones bearing perfluorosulfonic acid side chains were designed to encode nanoscale phase-separation, well-defined hydrophilic/hydrophobic interfaces, and optimized transport properties. Herein, we show that the superacid side chains yield highly ordered morphologies that can be tailored by best compromising ion-exchange capacity and block lengths. The obtained microstructures were extensively characterized by small-angle neutron scattering (SANS) over an extended range of hydration. Peculiar swelling behaviors were evidenced at two different scales and attributed to the dilution of locally flat polymer particles. We evidence the direct correlation between the quality of interfaces, the topology and connectivity of ionic nanodomains, the block superstructure long-range organization, and the transport properties. In particular, we found that the proton conductivity linearly depends on the microscopic expansion of both ionic and block domains. These findings indicate that neat nanoscale phase-separation and block-induced long-range connectivity can be optimized by designing aromatic ionomers with controlled architectures to improve the performances of polymer electrolyte membranes.
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Affiliation(s)
- Huu-Dat Nguyen
- LEPMI, Université Grenoble Alpes - CNRS , 38000 Grenoble, France
| | - Luca Assumma
- LEPMI, Université Grenoble Alpes - CNRS , 38000 Grenoble, France
| | - Patrick Judeinstein
- Laboratoire Léon Brillouin (LLB), CNRS-CEA, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex, France
| | - Regis Mercier
- Ingénierie des Matériaux Polymères, Université de Lyon , 69622 Villeurbanne, France
| | - Lionel Porcar
- Institut Laue Langevin (ILL) , 38002 Grenoble, France
| | - Jacques Jestin
- Laboratoire Léon Brillouin (LLB), CNRS-CEA, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex, France
| | - Cristina Iojoiu
- LEPMI, Université Grenoble Alpes - CNRS , 38000 Grenoble, France
| | - Sandrine Lyonnard
- INAC-SPrAM, Université Grenoble Alpes - CEA - CNRS , 38000 Grenoble, France
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14
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Mendil-Jakani H, Zamanillo López I, Mareau VH, Gonon L. Optimization of hydrophilic/hydrophobic phase separation in sPEEK membranes by hydrothermal treatments. Phys Chem Chem Phys 2017; 19:16013-16022. [DOI: 10.1039/c7cp00087a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The swelling behavior of sPEEK membranes: a thermally activated process associated to the β-relaxation crossover.
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Affiliation(s)
- H. Mendil-Jakani
- SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé
- UMR 5819 SyMMES (CEA-CNRS-UGA)
- CEA-Grenoble
- Grenoble
- France
| | - I. Zamanillo López
- SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé
- UMR 5819 SyMMES (CEA-CNRS-UGA)
- CEA-Grenoble
- Grenoble
- France
| | - V. H. Mareau
- SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé
- UMR 5819 SyMMES (CEA-CNRS-UGA)
- CEA-Grenoble
- Grenoble
- France
| | - L. Gonon
- SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé
- UMR 5819 SyMMES (CEA-CNRS-UGA)
- CEA-Grenoble
- Grenoble
- France
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15
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Nie GX, Huang JY, Huang JP. Melting–Freezing Transition of Monolayer Water Confined by Phosphorene Plates. J Phys Chem B 2016; 120:9011-8. [DOI: 10.1021/acs.jpcb.6b02473] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. X. Nie
- Department
of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - J. Y. Huang
- Department
of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - J. P. Huang
- Department
of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
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16
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Danyliv O, Iojoiu C, Lyonnard S, Sergent N, Planes E, Sanchez JY. Highly Phase Separated Aromatic Ionomers Bearing Perfluorosulfonic Acids by Bottom-up Synthesis: Effect of Cation on Membrane Morphology and Functional Properties. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00629] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olesia Danyliv
- Université Grenoble Alpes, LEPMI, Grenoble, F-38000, France
| | - Cristina Iojoiu
- Université Grenoble Alpes, LEPMI, Grenoble, F-38000, France
- CNRS, LEPMI, Grenoble, F-38000, France
| | | | - Nicolas Sergent
- Université Grenoble Alpes, LEPMI, Grenoble, F-38000, France
- CNRS, LEPMI, Grenoble, F-38000, France
| | - Emilie Planes
- CNRS, LEPMI, Grenoble, F-38000, France
- Université Savoie Mont Blanc, LEPMI, Chambéry, F-73000, France
| | - Jean-Yves Sanchez
- Université Grenoble Alpes, LEPMI, Grenoble, F-38000, France
- CNRS, LEPMI, Grenoble, F-38000, France
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17
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Calabrese MA, Wagner NJ, Rogers SA. An optimized protocol for the analysis of time-resolved elastic scattering experiments. SOFT MATTER 2016; 12:2301-2308. [PMID: 26781708 DOI: 10.1039/c5sm03039k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A deconvolution protocol is developed for obtaining material responses from time-resolved small-angle scattering data from light (SALS), X-rays (SAXS), or neutrons (SANS). Previously used methods convolve material responses with information from the procedure used to group data into discrete time intervals, known as binning. We demonstrate that enhanced signal resolution can be obtained by using methods of signal processing to analyze time-resolved scattering data. The method is illustrated for a time-resolved rheo-SANS measurement of a complex, structured surfactant solution under oscillatory shear flow. We show how the underlying material response can be clearly decoupled from the binning procedure. This method greatly reduces the experimental acquisition time, by approximately one-third for the aforementioned rheo-SANS experiment.
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Affiliation(s)
- Michelle A Calabrese
- University of Delaware Department of Chemical and Biomolecular Engineering, Center for Neutron Science, 150 Academy St., Newark, DE, USA.
| | - Norman J Wagner
- University of Delaware Department of Chemical and Biomolecular Engineering, Center for Neutron Science, 150 Academy St., Newark, DE, USA.
| | - Simon A Rogers
- University of Delaware Department of Chemical and Biomolecular Engineering, Center for Neutron Science, 150 Academy St., Newark, DE, USA.
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Hanot S, Lyonnard S, Mossa S. Sub-diffusion and population dynamics of water confined in soft environments. NANOSCALE 2016; 8:3314-3325. [PMID: 26690685 DOI: 10.1039/c5nr05853h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We have studied by using molecular dynamics computer simulations the dynamics of water confined in ionic surfactant phases, ranging from well ordered lamellar structures to micelles at low and high water loading, respectively. We have analysed in depth the main dynamical features in terms of mean-squared displacements and intermediate scattering functions, and found clear evidence of sub-diffusive behaviour. We have identified water molecules lying at the charged interface with the hydrophobic confining matrix as the main factor responsible for this unusual feature, and given a comprehensive picture of dynamics based on a very precise analysis of lifetimes at the interface. We conclude by providing, for the first time to our knowledge, a unique framework for rationalizing the existence of important dynamical heterogeneities in fluids adsorbed in soft confining environments.
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Affiliation(s)
- Samuel Hanot
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France.
| | - Sandrine Lyonnard
- Univ. Grenoble Alpes, INAC-SPRAM, F-38000 Grenoble, France. and CNRS, INAC-SPRAM, F-38000 Grenoble, France and CEA, INAC-SPRAM, F-38000 Grenoble, France.
| | - Stefano Mossa
- Univ. Grenoble Alpes, INAC-SPRAM, F-38000 Grenoble, France. and CNRS, INAC-SPRAM, F-38000 Grenoble, France and CEA, INAC-SPRAM, F-38000 Grenoble, France.
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Interfacial constraints on water and proton transport across nafion membranes. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23794] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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