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Journal articles on the topic 'Anion exchange polymer membrane'

Author: Grafiati

Published: 12 October 2024

Last updated: 31 July 2025

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1

Cho, Hyeongrae, Henning Krieg, and Jochen Kerres. "Performances of Anion-Exchange Blend Membranes on Vanadium Redox Flow Batteries." Membranes 9, no. 2 (2019): 31. http://dx.doi.org/10.3390/membranes9020031.

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Anion exchange blend membranes (AEBMs) were prepared for use in Vanadium Redox Flow Batteries (VRFBs). These AEBMs consisted of 3 polymer components. Firstly, PBI-OO (nonfluorinated PBI) or F6-PBI (partially fluorinated PBI) were used as a matrix polymer. The second polymer, a bromomethylated PPO, was quaternized with 1,2,4,5-tetramethylimidazole (TMIm) which provided the anion exchange sites. Thirdly, a partially fluorinated polyether or a non-fluorinated poly (ether sulfone) was used as an ionical cross-linker. While the AEBMs were prepared with different combinations of the blend polymers,

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2

Kuppusamy, Hari Gopi, Prabhakaran Dhanasekaran, Niluroutu Nagaraju, et al. "Anion Exchange Membranes for Alkaline Polymer Electrolyte Fuel Cells—A Concise Review." Materials 15, no. 16 (2022): 5601. http://dx.doi.org/10.3390/ma15165601.

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Solid anion exchange membrane (AEM) electrolytes are an essential commodity considering their importance as separators in alkaline polymer electrolyte fuel cells (APEFC). Mechanical and thermal stability are distinguished by polymer matrix characteristics, whereas anion exchange capacity, transport number, and conductivities are governed by the anionic group. The physico-chemical stability is regulated mostly by the polymer matrix and, to a lesser extent, the cationic head framework. The quaternary ammonium (QA), phosphonium, guanidinium, benzimidazolium, pyrrolidinium, and spirocyclic cation-

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3

Lee, Seunghyun, Hyejin Lee, Tae-Hyun Yang, et al. "Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications." Membranes 10, no. 11 (2020): 306. http://dx.doi.org/10.3390/membranes10110306.

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Perfluorinated polymers are widely used in polymer electrolyte membranes because of their excellent ion conductivity, which are attributed to the well-defined morphologies resulting from their extremely hydrophobic main-chains and flexible hydrophilic side-chains. Perfluorinated polymers containing quaternary ammonium groups were prepared from Nafion- and Aquivion-based sulfonyl fluoride precursors by the Menshutkin reaction to give anion exchange membranes. Perfluorinated polymers tend to exhibit poor solubility in organic solvents; however, clear polymer dispersions and transparent membranes

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4

Pintauro, Peter N. "(Invited) Monopolar and Bipolar Membranes Based on Nanofiber Electrospinning." ECS Meeting Abstracts MA2023-02, no. 39 (2023): 1893. http://dx.doi.org/10.1149/ma2023-02391893mtgabs.

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Cation-exchange, anion-exchange, and bipolar membranes play crucial roles in a variety of electrochemical processes and devices, including chloralkali cells, electrodialysis separations for water purification, proton-exchange membrane and hydroxide-exchange membrane (alkaline) fuel cells, redox flow batteries, and processes for direct air capture of CO2. The incorporation of polymeric nanofibers into such membranes provides an attractive and tunable method of creating materials with new nano-morphologies and highly desirable properties. The impregnation of an ionomer solution into a pre-formed

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Yang, Zezhou, Ryszard Wycisk, and Peter N. Pintauro. "(Invited) Bipolar Membranes with a 3D Junction of Interlocking Electrospun Fibers." ECS Meeting Abstracts MA2022-02, no. 44 (2022): 1661. http://dx.doi.org/10.1149/ma2022-02441661mtgabs.

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Bipolar membranes (BPMs), typically laminated layers of anion-exchange and cation-exchange polymers, have the unique capability of splitting water at a potential near 0.83 V. Such membranes are used in electrodialysis membrane separation processes. They also have applications in water electrolyzers, CO2 electrolysis cells, and self-humidifying fuel cells. We report here on recent developments regarding BPMs with a high interfacial area, 3D nanofiber junction. Membranes were prepared by first creating a bipolar junction layer, by the simultaneous electrospinning of anion-exchange and cation-exc

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6

Palanivel, Tamilazhagan, Shankara Kalanur, Vinodh Rajangam, and Bruno Georges Pollet. "Development of a Superior Anion Exchange Membrane with Hyperbranched Polymer for Anion Exchange Membrane Water Electrolysis." ECS Meeting Abstracts MA2024-02, no. 43 (2024): 2919. https://doi.org/10.1149/ma2024-02432919mtgabs.

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Hydrogen is a clean and renewable energy, that provides numerous potential benefits to industries, and households, with zero greenhouse gas emissions, and increased energy security. Mainly hydrogen energy is widely seen as a key component to combat climate change that could potentially fulfill the global energy demands in the future. Hence, hydrogen production technologies are considered an important energy and R&D sector in both academics and industries. Currently, water with its abundance in electrolysis mode is known to be an effective route of green hydrogen production. Specifically, h

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7

Wu, Wei. "Block copolymers as anion exchange membrane in fuel cells." Applied and Computational Engineering 66, no. 1 (2024): 198–203. http://dx.doi.org/10.54254/2755-2721/66/20240951.

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Anion exchange membranes play a crucial part as the primary component of alkaline fuel cells, yet their optimization remains an ongoing endeavor. While research and development efforts have made strides in advancing anion exchange membranes, a pressing need exists to further refine their mechanical properties, ionic conductivity, and chemical stability, especially in comparison to proton exchange membranes. Block copolymers have emerged as promising candidates among the array of materials explored for enhancing anion exchange membranes due to their inherent advantages. These copolymers offer u

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8

Shen, Haiyang, Yifei Gong, Wei Chen, Xianbiao Wei, Ping Li, and Congliang Cheng. "Anion Exchange Membrane Based on BPPO/PECH with Net Structure for Acid Recovery via Diffusion Dialysis." International Journal of Molecular Sciences 24, no. 10 (2023): 8596. http://dx.doi.org/10.3390/ijms24108596.

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In order to improve the performance of the anion exchange membrane (AEM) used in acid recovery from industrial wastewater, this study adopted a new strategy in which brominated poly (2,6-dimethyl-1,4-phenyleneoxide) (BPPO) and polyepichlorohydrin (PECH) were used as the polymer backbone of the prepared membrane. The new anion exchange membrane with a net structure was formed by quaternizing BPPO/PECH with N,N,N,N-tetramethyl-1,6-hexanediamine (TMHD). The application performance and physicochemical property of the membrane were adjusted by changing the content of PECH. The experimental study fo

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9

Kerres, Jochen Alfred. "(Invited) Novel Polymer and Membrane Development Strategies for Water Electrolysis." ECS Meeting Abstracts MA2024-01, no. 34 (2024): 1741. http://dx.doi.org/10.1149/ma2024-01341741mtgabs.

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Water electrolysis processes play a crucial role in transitioning to a climate-friendly society. They facilitate the integration of renewable energy, offer a clean and versatile energy carrier, decarbonize industries, improve energy storage and grid stability, and support the development of sustainable transportation solutions. As technology advances and economies of scale are realized, electrolysis is expected to play an increasingly significant role in the clean energy landscape, contributing to a more sustainable and resilient future. Various water-splitting electrolysis processes currently

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10

Jung, Jiyoon, Young Sang Park, Gwan Hyun Choi, et al. "Alkaline-Stable, In Situ Menshutkin Coat and Curable Ammonium Network: Ion-Solvating Membranes for Anion Exchange Membrane Water Electrolyzers." International Journal of Energy Research 2023 (September 30, 2023): 1–12. http://dx.doi.org/10.1155/2023/7416537.

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Anion exchange membranes fabricated through a one-step Menshutkin reaction with down-selected multifunctional alkyl halides and multifunctional tertiary amines within an ion-solvating matrix, poly(ethylene-co-vinyl alcohol), yielded alkaline-stable ammonium network polymers. Due to the vast simplicity in fabrication due to the quaternization/Menshutkin reaction between tertiary amine and alkyl bromides, which does not evolve any by-products that require purification, alkaline-stable membranes were fabricated in one step through facile mixing and curing of alkaline-stable ammonium network formi

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11

Samsudin, Asep Muhamad, Sigrid Wolf, Michaela Roschger, and Viktor Hacker. "Poly(vinyl alcohol)-based Anion Exchange Membranes for Alkaline Polymer Electrolyte Fuel Cells." International Journal of Renewable Energy Development 10, no. 3 (2021): 435–43. http://dx.doi.org/10.14710/ijred.2021.33168.

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Crosslinked anion exchange membranes (AEMs) made from poly(vinyl alcohol) (PVA) as a backbone polymer and different approaches to functional group introduction were prepared by means of solution casting with thermal and chemical crosslinking. Membrane characterization was performed by SEM, FTIR, and thermogravimetric analyses. The performance of AEMs was evaluated by water uptake, swelling degree, ion exchange capacity, OH- conductivity, and single cell tests. A combination of quaternized ammonium poly(vinyl alcohol) (QPVA) and poly(diallyldimethylammonium chloride) (PDDMAC) showed the highest

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12

Cho, Hyeongrae, Vladimir Atanasov, Henning M. Krieg, and Jochen A. Kerres. "Novel Anion Exchange Membrane Based on Poly(Pentafluorostyrene) Substituted with Mercaptotetrazole Pendant Groups and Its Blend with Polybenzimidazole for Vanadium Redox Flow Battery Applications." Polymers 12, no. 4 (2020): 915. http://dx.doi.org/10.3390/polym12040915.

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In order to evaluate the performance of the anion exchange membranes in a vanadium redox flow battery, a novel anion exchange polymer was synthesized via a three step process. Firstly, 1-(2-dimethylaminoethyl)-5-mercaptotetrazole was grafted onto poly(pentafluorostyrene) by nucleophilic F/S exchange. Secondly, the tertiary amino groups were quaternized by using iodomethane to provide anion exchange sites. Finally, the synthesized polymer was blended with polybenzimidazole to be applied in vanadium redox flow battery. The blend membranes exhibited better single cell battery performance in terms

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Vijayakumar, Vijayalekshmi, and Sang Yong Nam. "A Review of Recent Chitosan Anion Exchange Membranes for Polymer Electrolyte Membrane Fuel Cells." Membranes 12, no. 12 (2022): 1265. http://dx.doi.org/10.3390/membranes12121265.

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Considering the critical energy challenges and the generation of zero-emission anion exchange membrane (AEM) sources, chitosan-based anion exchange membranes have garnered considerable interest in fuel cell applications owing to their various advantages, including their eco-friendly nature, flexibility for structural modification, and improved mechanical, thermal, and chemical stability. The present mini-review highlights the advancements of chitosan-based biodegradable anion exchange membranes for fuel cell applications published between 2015 and 2022. Key points from the rigorous literature

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14

Luong, Triet Nguyen Dai, Si Chen, and Patric Jannasch. "Hydroxide Conducting Naphthalene-Containing Polymers and Membranes Via Polyhydroxyalkylations." ECS Meeting Abstracts MA2023-02, no. 39 (2023): 1890. http://dx.doi.org/10.1149/ma2023-02391890mtgabs.

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Anion exchange membranes (AEMs) are critical components of alkaline membrane water electrolyzers and fuel cells that are under development today [1,2]. Consequently, there is a strong demand for highly conductive and alkali-stable AEMs. In this context, polyhydroxyalkylation has emerged as one of the most efficient synthetic pathways to chemically resistant polymer backbones for AEMs. In these Friedel-Crafts type polycondensations, an electron-rich aromatic compound reacts with an activated ketone or aldehyde to produce an aryl-ether-free polymer. The desired quaternary ammonium cations are th

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15

Singh, Siddhant, Flora Tseng, Wei Lu, Jeff Sakamoto, and David G. Kwabi. "Electrochemical Desalination Using a Hybrid Redox-Flow Cell with a Ceramic Ion Conductor." ECS Meeting Abstracts MA2022-02, no. 27 (2022): 1058. http://dx.doi.org/10.1149/ma2022-02271058mtgabs.

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Electrochemical desalination is a potentially energy-efficient strategy for distributed, small-scale purification of brackish sources, especially as compared to conventional processes that are reliant on heat or reverse osmosis. One promising subcategory of electrochemical desalination systems features a combination of sodium-intercalating electrodes and polymer-based anion-exchange membranes. Although desalination is technically feasible with this design, polymer-based ion-exchange membranes tend to have imperfect permselectivities and to be susceptible to water crossover between diluate and

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16

Kim, Yu Seung. "(Invited) Electrochemical Oxidation of Anion Exchange Membranes." ECS Meeting Abstracts MA2025-01, no. 38 (2025): 1845. https://doi.org/10.1149/ma2025-01381845mtgabs.

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Over the past five years, our group identified electrochemical oxidation of anion exchange polymers as a key performance-limiting factor in anion exchange membrane water electrolyzers [1-3]. In this presentation, we explore the mechanisms of electrochemical oxidation and strategies to mitigate it. We begin by reviewing electrochemical methods for detecting polymer oxidation and examining the relationship between polymer structure and degradation. We then discuss strategies to mitigate electrochemical oxidation in anion exchange materials, with a particular focus on competitive adsorption appro

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17

Kruczala, Krzysztof, and Dario R. Dekel. "(Invited) Operando EPR Study on Radicals in Anion-Exchange Membrane Fuel Cells." ECS Meeting Abstracts MA2022-02, no. 43 (2022): 1623. http://dx.doi.org/10.1149/ma2022-02431623mtgabs.

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In the rapidly developing modern society, there is an urgent need for the wide-ranging availability of advanced and eco-friendly energy sources. One of the possible alternatives is the application of anion exchange membrane fuel cells (AEMFCs) with a catalyst reducing dioxygen efficiently. These promising devices can revolutionize the energy sector since they practically produce no pollution. However, to make them more widely used, several obstacles must be overcome. As a result, vast-ranging investigations focus on improving the properties of conductive polymer membranes [1] and catalysts for

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Mothupi, Moshito Lethabo, and Phumlani Fortune Msomi. "Quaternized Polyethersulfone (QPES) Membrane with Imidazole Functionalized Graphene Oxide (ImGO) for Alkaline Anion Exchange Fuel Cell Application." Sustainability 15, no. 3 (2023): 2209. http://dx.doi.org/10.3390/su15032209.

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Membranes made up of composite materials have shown promising advantages for application in alkaline fuel cell anion exchange membranes. In this study, a general method is employed to improve the overall performance and properties of alkaline anion exchange membranes by making use of polyethersulfone quaternized with imidazolium groups and blended with imidazolium functionalized graphene oxide inorganic filler (ImGO). The inorganic filler blended with the polymer matrix yielded better ionic transport, with 73.2 mS·cm−1 being the highest ion conductivity for the polymer membrane with 0.5% ImGO

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Xu, Jiahe, Johna Leddy, and Carol Korzeniewski. "Cyclic Voltammetry as a Probe of Selective Ion Transport within Layered, Electrode-Supported Ion-Exchange Membrane Materials." Journal of The Electrochemical Society 169, no. 2 (2022): 026520. http://dx.doi.org/10.1149/1945-7111/ac51fd.

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Cyclic voltammetry was applied to investigate the permselective properties of electrode-supported ion-exchange polymer films intended for use in future molecular-scale spectroscopic studies of bipolar membranes. The ability of thin ionomer film assemblies to exclude mobile ions charged similarly to the polymer (co-ions) and accumulate ions charged opposite to the polymer (counterions) was scrutinized through use of the diffusible redox probe molecules [Ru(NH3)6]3+ and [IrCl6]2−. With the anion exchange membrane (AEM) phase supported on a carbon disk electrode, bipolar junctions formed by addit

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Palanivel, Tamilazhagan, Shankara Kalanur, Vinodh Rajangam, and Bruno Georges Pollet. "Development of a Superior Anion Exchange Membrane with Hyperbranched Polymer for Anion Exchange Membrane Water Electrolysis." ECS Transactions 114, no. 5 (2024): 169–77. http://dx.doi.org/10.1149/11405.0169ecst.

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The production of hydrogen using membrane-based electrolyzersposes significant advantages and benefits compared to traditionalelectrolysis methods. Among the electrolyzers, anion exchangemembrane water electrolysis (AEMWE) has emerged as one of thepromising technologies owing to its unique advantages. However,the development of efficient AEMs for water electrolysis presentssignificant challenges, particularly in achieving enhanceddimensional stability and conductivity. In this study, ahyperbranched polyesteramide (HPEA) was synthesized andblended with poly(ether sulfone) (PES) to address the c

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21

Singh, Siddhant, Wei Lu, Jeff Sakamoto, and David G. Kwabi. "Electrochemical Desalination Using a Hybrid Redox Flow Cell." ECS Meeting Abstracts MA2022-01, no. 55 (2022): 2285. http://dx.doi.org/10.1149/ma2022-01552285mtgabs.

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Electrochemical desalination is an attractive, energy-efficient strategy for small-scale, distributed water purification systems, as compared to conventional thermal desalination or reverse osmosis. Many incumbent electrochemical desalination cells feature a combination of sodium-intercalating electrodes and polymer-based anion-exchange membranes with non-ideal permselectivities. We propose a hybrid flow cell design that features a redox-active electrolyte separated by a cation exchange membrane from a solid, anion-converting or anion-intercalating electrode. This design makes use of a dense,

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Park, Eun Joo, Christopher Arges, Hui Xu, et al. "Polymer Design Strategies for Alkaline Membrane Water Electrolysis." ECS Meeting Abstracts MA2023-02, no. 42 (2023): 2066. http://dx.doi.org/10.1149/ma2023-02422066mtgabs.

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Water electrolysis is a carbon-free hydrogen production technology, making it a promising candidate to mitigate aggravating climate change. Ion exchange membranes are an essential component of membrane-based water electrolysis, enabling high hydrogen production efficiency through a zero-gap configuration. The recent research efforts to develop anion exchange membranes and electrode ionomers have made significant improvement in durability of alkaline membrane water electrolyzers without sacrificing performance and efficiency. Still, there are several factors related to polymer electrolytes that

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Samsudin, Asep Muhamad, Nur Rokhati, Nor Basid Adiwibawa Prasetya, et al. "Impact of crosslinking on quaternary ammonium poly(vinyl alcohol)/polyquaternium-7 anion exchange membranes for alkaline polymer electrolyte fuel cells." International Journal of Renewable Energy Development 14, no. 4 (2025): 717–26. https://doi.org/10.61435/ijred.2025.60897.

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Alkaline Polymer Electrolyte Fuel Cells (APEFCs) have emerged as a promising candidate for clean energy production. Anion exchange membrane (AEM) is an essential element of alkaline polymer electrolyte fuel cells for its role in facilitating hydroxide ion conduction. The objective of this study is to investigate the effect of a glutaraldehyde-based crosslinker solution on the performance of anion exchange membranes (AEMs) fabricated using quaternary ammonium poly (vinyl alcohol) (QPVA) as the backbone polymer and polyquaternium-7 as the second polymer. The introduction of a glutaraldehyde-base

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Samsudin, Asep Muhamad, Merit Bodner, and Viktor Hacker. "A Brief Review of Poly(Vinyl Alcohol)-Based Anion Exchange Membranes for Alkaline Fuel Cells." Polymers 14, no. 17 (2022): 3565. http://dx.doi.org/10.3390/polym14173565.

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Anion exchange membrane fuel cells have unique advantages and are thus gaining increasing attention. Poly(vinyl alcohol) (PVA) is one of the potential polymers for the development of anion exchange membranes. This review provides recent studies on PVA-based membranes as alternative anion exchange membranes for alkaline fuel cells. The development of anion exchange membranes in general, including the types, materials, and preparation of anion exchange membranes in the last years, are discussed. The performances and characteristics of recently reported PVA-based membranes are highlighted, includ

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Park, Habin, Chenyu Li, and Paul Kohl. "Durability and Performance of Poly(norbornene) Anion Exchange Membrane Alkaline Electrolyzer with High Ionic Strength Anolyte." ECS Meeting Abstracts MA2024-01, no. 34 (2024): 1792. http://dx.doi.org/10.1149/ma2024-01341792mtgabs.

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Anion exchange polymer electrolytes enable low-temperature alkaline water electrolysis for reliable green hydrogen production. Anion exchange membrane water electrolysis (AEMWE) with alkaline electrolytes has several advantages over the proton exchange membrane water electrolysis using acid-based polymer electrolytes. The advantages include low-cost catalysts, all hydrocarbon non-fluorinated polymer membrane, and low-cost cell components. Long-term durability of AEMWEs in high pH operation has been challenging, although there have been significant performance improvements. AEMWE operated at lo

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Fang, Jun, Chang Ming Zhang, and Yi Xu Yang. "Preparation and Characterization of Polymer Electrolyte Membranes by Radiation Grafted Copolymerization." Advanced Materials Research 485 (February 2012): 110–13. http://dx.doi.org/10.4028/www.scientific.net/amr.485.110.

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Novel anion exchange membranes were synthesized by grafted copolymerization of 1-vinylimidazole onto pre-irradiated ethylene-tetrafluoroethylene copolymer (ETFE) film, followed by quaternization and alkalization. The structure of the membranes was studied by Fourier transform infrared (FT-IR). The physicochemical and electrochemical properties of the membranes were also characterized. The ionic conductivity of the synthesized membrane is 0.03 S/cm at 30°C. This result indicates that the membrane is suitable polymer electrolyte membrane and so may find potential applications in alkaline membran

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Fischer, Lukas, Sven Sören Hartmann, Artjom Maljusch, Christian Däschlein, Oleg Prymak, and Mathias Ulbricht. "The influence of anion-exchange membrane nanostructure onto ion transport: Adjusting membrane performance through fabrication conditions." Journal of Membrane Science Volume 669 (December 27, 2022): 121306. https://doi.org/10.1016/j.memsci.2022.121306.

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We fabricated dense anion-exchange membranes from the same polymer with variations in the self-assembled hydrophilic and hydrophobic domains. We show how the nanostructure forms during membrane formation and how it can be tuned by rationally designing fabrication conditions. We found that the hydrophilic and hydrophobic domain structure evolves during the membrane solidification. This can be controlled by using casting solvents with different evaporation times or by the addition of an ionic liquid which alters the interactions in the polymer film. We could further tailor the structure of solid

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Son, Tae Yang, Jun Seong Yun, Kihyun Kim, and Sang Yong Nam. "Electrochemical Performance Evaluation of Bipolar Membrane Using Poly(phenylene oxide) for Water Treatment System." Journal of Nanoscience and Nanotechnology 20, no. 11 (2020): 6797–801. http://dx.doi.org/10.1166/jnn.2020.18788.

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This study describes the use of poly(phenylene oxide) polymer-based ion-exchange polymers, polystyrene-based ion-exchange particles and a porous support for fabricating bipolar membranes and the results of an assessment of the applicability of these materials to water splitting. In order to achieve good mechanical as well as good ion-exchange properties, bipolar membranes were prepared by laminating poly(phenylene oxide) and polystyrene based ion-exchange membranes with a sulfonated polystyrene-block-(ethylene-ran-butylene)-block-polystyrene) (S-SEBS) modified interface. PE pore-supported ion-

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Nikolic, Nikola, Björn Eriksson, Rakel Lindstrom, Carina Lagergren, and Göran Lindbergh. "Hydrogen Crossover in Anion Exchange Membrane Fuel Cells." ECS Meeting Abstracts MA2023-02, no. 39 (2023): 1912. http://dx.doi.org/10.1149/ma2023-02391912mtgabs.

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In recent years anion exchange membrane fuel cells (AEMFC) have started to draw more attention by potentially allowing catalysts based on more abundant materials, and by showing high performance [1]. One often overlooked parameter in these systems is membrane permeability of hydrogen, often referred to as hydrogen crossover, which directly affects fuel cell stability and efficiency. This undesirable effect creates mixed potential due to the permeated hydrogen reacting with oxygen on the cathode, and not generating useful electric energy, only water and heat [2]. The generated heat creates hots

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Butylskii, Dmitrii Yu, Vasiliy A. Troitskiy, Maria A. Ponomar, Ilya A. Moroz, Konstantin G. Sabbatovskiy, and Mikhail V. Sharafan. "Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22." Membranes 12, no. 11 (2022): 1065. http://dx.doi.org/10.3390/membranes12111065.

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Anion-exchange membranes modified with a polyquaternium-22 (PQ-22) polymer were studied for their use in electrodialysis. The use of PQ-22 for modification makes it possible to “replace” weakly basic amino groups on the membrane surface with quaternary amino groups. It was found that the content of quaternary amino groups in PQ-22 is higher than the content of carboxyl groups, which is the reason for the effectiveness of this polymer even when modifying Ralex AHM-PES membranes that initially contain only quaternary amino groups. In the case of membranes containing weakly basic amino groups, th

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Eti, Mine, Aydın Cihanoğlu, Enver Güler, et al. "Further Development of Polyepichlorohydrin Based Anion Exchange Membranes for Reverse Electrodialysis by Tuning Cast Solution Properties." Membranes 12, no. 12 (2022): 1192. http://dx.doi.org/10.3390/membranes12121192.

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Recently, there have been several studies done regarding anion exchange membranes (AEMs) based on polyepichlorohydrin (PECH), an attractive polymer enabling safe membrane fabrication due to its inherent chloromethyl groups. However, there are still undiscovered properties of these membranes emerging from different compositions of cast solutions. Thus, it is vital to explore new membrane properties for sustainable energy generation by reverse electrodialysis (RED). In this study, the cast solution composition was easily tuned by varying the ratio of active polymer (i.e., blend ratio) and quater

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Herring, Andrew M., Mei-Chen Kuo, Ivy Wu, Jack Creel, Marco Salgado, and E. Bryan Coughlin. "Understanding How Anion Exchange Membranes and Cationic Polymer/Catalyst Interactions Behave with Time in Alkaline Electrolysis." ECS Meeting Abstracts MA2023-02, no. 39 (2023): 1895. http://dx.doi.org/10.1149/ma2023-02391895mtgabs.

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We are leveraging our existing success with anion exchange membranes (AEM) to develop new highly stable and highly conductive membranes and ionomers for AEM electrolysis. Our novel and scalable tri-block co-polymers ABA or BAB, where the A block can be functionalized with an advanced chemically stable cation and the B block is an unsaturated polymer that when hydrogenated results in high anion conduction membranes with exceptional mechanical strength and durability analogous to polyethylene (PE). We have also developed a novel immobilization technology for processable catalyst inks. Synergisti

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Chen, Nanjun, Hong Zhu, Yuhao Chu, Rui Li, Yang Liu, and Fanghui Wang. "Cobaltocenium-containing polybenzimidazole polymers for alkaline anion exchange membrane applications." Polymer Chemistry 8, no. 8 (2017): 1381–92. http://dx.doi.org/10.1039/c6py01936f.

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Thangarasu, Sadhasivam, and Tae-Hwan Oh. "Recent Developments on Bioinspired Cellulose Containing Polymer Nanocomposite Cation and Anion Exchange Membranes for Fuel Cells (PEMFC and AFC)." Polymers 14, no. 23 (2022): 5248. http://dx.doi.org/10.3390/polym14235248.

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Hydrogen fuel cell (FC) technologies are being worked on as a possible replacement for fossil fuels because they produce a lot of energy and do not pollute the air. In FC, ion-exchange membranes (IEMs) are the vital components for ion transport between two porous electrodes. However, the high production cost of commercialized membranes limits their benefits. Various research has focused on cellulose-based membranes such as IEM with high proton conductivity, and mechanical, chemical, and thermal stabilities to replace the high cost of synthetic polymer materials. In this review, we focus on and

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Veh, Philipp, Benjamin Britton, Steven Holdcroft, Roland Zengerle, Severin Vierrath, and Matthias Breitwieser. "Improving the water management in anion-exchange membrane fuel cells via ultra-thin, directly deposited solid polymer electrolyte." RSC Advances 10, no. 15 (2020): 8645–52. http://dx.doi.org/10.1039/c9ra09628k.

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Bae, Chulsung. "(Invited) Molecular Engineering of Ion-Conducting Polymer Membranes for Electrochemical Energy Storage and Conversion Technologies." ECS Meeting Abstracts MA2022-01, no. 39 (2022): 1731. http://dx.doi.org/10.1149/ma2022-01391731mtgabs.

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Anion exchange membranes (AEMs) based on hydroxide-conducting polymers are a key component for anion-based electrochemical energy technology such as fuel cells, electrolyzers, and advanced batteries. Although these alkaline electrochemical technologies offer a promising alternative to acidic proton exchange membrane electrochemical devices, the access to chemically stable, mechanically durable, high-performing polymer electrolyte materials has been bottleneck to advance electrochemical technologies for hydrogen and other green chemicals until now. Despite vigorous research of AEM polymer desig

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Ji, Yuanyuan, Hongxi Luo, and Geoffrey M. Geise. "Effects of fixed charge group physicochemistry on anion exchange membrane permselectivity and ion transport." Physical Chemistry Chemical Physics 22, no. 14 (2020): 7283–93. http://dx.doi.org/10.1039/d0cp00018c.

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Understanding the effects of polymer chemistry on membrane ion transport properties is critical for enabling efforts to design advanced highly permselective ion exchange membranes for water purification and energy applications.

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Phua, Yin Kan, Tsuyohiko Fujigaya, and Koichiro Kato. "Nuclear Magnetic Resonance Chemical Shift As Highly Explainable Chemical Structure Fingerprints for Anion Exchange Membrane Polymers." ECS Meeting Abstracts MA2023-02, no. 65 (2023): 3153. http://dx.doi.org/10.1149/ma2023-02653153mtgabs.

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Recent shift towards clean energy increased the demand for both fuel cells (used as clean power generator) and water electrolyzer (used as hydrogen supply) significantly. Anion exchange membrane (AEM) serves as a core component for these devices, though its low anion conductivity and durability inhibit their potential for commercialization. Many research and development (R&D) have been done seeking for improvements in AEM1, but current empirical-centric method consumes significant amount of resources, such as cost, labor, and time. To reduce resource consumptions, implementing materials in

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Atlaskin, A. A., A. A. Andronova, and O. V. Kazarina. "Thermal Decomposition Characteristics of Poly((4-Vinylbenzyl) Trimethylammonium Bis (Trifluoromethanesulfonimide)) Studied by Pyrolysis-GS / MS." Key Engineering Materials 887 (May 2021): 91–97. http://dx.doi.org/10.4028/www.scientific.net/kem.887.91.

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Over the past decades, significant advances have been made in the development and research of gas separation membranes based on ionic liquids (IL) and their polymer analogs (PIL) for membrane separation of "acid gases" such as CO2 and H2S from gas mixtures. Polymers containing various amino groups are of great interest for the selective separation of acid gases from gas mixtures, since ammonia and its derivatives are used in conventional purification. In this work, we have synthesized a monomeric ionic liquid based on 4 vinylbenzyl chloride with included triethylamine by the Menshutkin reactio

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Feng, Zhiming, Gaurav Gupta, and Mohamed Mamlouk. "Degradation of QPPO-based anion polymer electrolyte membrane at neutral pH." RSC Advances 13, no. 29 (2023): 20235–42. http://dx.doi.org/10.1039/d3ra02889e.

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Koch, Susanne, Joey Disch, Sophia K. Kilian, Lukas Metzler, and Severin Vierrath. "Water Transport and Salt Precipitation in Anion-Exchange Membrane Electrolyzers." ECS Meeting Abstracts MA2023-02, no. 42 (2023): 2068. http://dx.doi.org/10.1149/ma2023-02422068mtgabs.

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The hydrophilic nature of hydrocarbon ionomers and membranes presents a major challenge in anion-exchange membrane (AEM) electrolysis, despite improved stability from reinforcements and modified polymer chemistry. Durability and performance are still highly influenced by the operation mode and water management within the membrane-electrode-assembly (MEA). Dry cathode operation in AEM water electrolysis, where only the anode is supplied with liquid electrolyte (KOH), offers increased hydrogen purity but poses challenges for non-fluorinated anion-exchange polymers that are sensitive to water con

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Zhou, Hengcheng, Peihai Ju, Shaowei Hu, et al. "Separation of Hydrochloric Acid and Oxalic Acid from Rare Earth Oxalic Acid Precipitation Mother Liquor by Electrodialysis." Membranes 13, no. 2 (2023): 162. http://dx.doi.org/10.3390/membranes13020162.

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In this study, the hydrochloric acid from rare earth oxalic acid precipitation mother liquor was separated by electrodialysis (ED) with different anion exchange membranes, including selective anion exchange membrane (SAEM), polymer alloy anion exchange membrane (PAAEM), and homogenous anion exchange membrane (HAEM). In addition to actual wastewater, nine types of simulated solutions with different concentrations of hydrochloric acid and oxalic acid were used in the experiments. The results indicated that the hydrochloric acid could be separated effectively by electrodialysis with SAEM from sim

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Ge, Qianqian, Yazhi Liu, Zhengjin Yang, et al. "Hyper-branched anion exchange membranes with high conductivity and chemical stability." Chemical Communications 52, no. 66 (2016): 10141–43. http://dx.doi.org/10.1039/c6cc04930c.

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Letsau, Thabakgolo T., Penny P. Govender, and Phumlani F. Msomi. "Imidazolium-Quaternized Poly(2,6-Dimethyl-1,4-Phenylene Oxide)/Zeolitic Imidazole Framework-8 Composite Membrane as Polymer Electrolyte for Fuel-Cell Application." Polymers 14, no. 3 (2022): 595. http://dx.doi.org/10.3390/polym14030595.

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Anion exchange membrane fuel cells (AEMFCs) are considered superior to their counterpart proton exchange fuel cells due to their many advantages. Both fuel cells use membranes as polymer electrolytes to improve fuel-cell properties and power output. This work evaluates a series of imidazolium-quaternized poly(2,6-dimethyl-1,4-phenylene oxide) (ImPPO) functionalized zeolitic imidazole framework-8 (ZIF-8) (ImPPO/ZIF-8) as anion exchange membrane (AEM) electrolytes in a direct methanol alkaline fuel cell. FTIR and 1H NMR were used to confirm the successful membrane fabrication. SEM and TGA were u

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Lee, Ming-Tsung. "Functionalized Triblock Copolymers with Tapered Design for Anion Exchange Membrane Fuel Cells." Polymers 16, no. 16 (2024): 2382. http://dx.doi.org/10.3390/polym16162382.

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Triblock copolymers such as styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) have been widely used as an anion exchange membrane for fuel cells due to their phase separation properties. However, modifying the polymer architecture for optimized membrane properties is still challenging. This research develops a strategy to control the membrane morphology based on quaternized SEBS (SEBS-Q) by dual-tapering the interfacial block sequences. The structural and transport properties of SEBS-Q with various tapering styles at different hydration levels are systematically investigated by coarse-grained

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Terin, Denis, Marina Kardash, Denis Ainetdinov, Timur Turaev, and Ilya Sinev. "Anion-Exchange Membrane “Polikon A” Based on Polyester Fiber Fabric (Functionalized by Low-Temperature High-Frequency Plasma) with Oxidized Metal Nanoparticles." Membranes 13, no. 8 (2023): 742. http://dx.doi.org/10.3390/membranes13080742.

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An experimental laboratory set of samples of composite heterogeneous anion-exchange membranes was obtained by us for the development of our original method of polycondensation filling. Anion-exchange membranes were prepared on plasma-treated and non-plasma-treated polyester fiber fabrics. The fabric was treated with low-temperature argon plasma at a power of 400 W for 10 min at a pressure of 5 × 10−5 mbar. On the surface and bulk of the polyester fiber, a polyfunctional anionite of mixed basicity was synthesized and formed. The anion-exchange membrane contained secondary and tertiary amino gro

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Jeong, Dahye, Minyoung Lee, Yeri Park, Mahamuda Akter, Jong-Hyeok Park, and Jin Soo Park. "Investigating Characteristics of Anion Exchange Membranes Utilizing Various Anion-Conducting Monomers for Water Electrolysis." ECS Meeting Abstracts MA2024-02, no. 28 (2024): 2186. https://doi.org/10.1149/ma2024-02282186mtgabs.

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Water electrolysis, a sustainable technology, converts electrical energy into chemical energy, producing hydrogen as a clean energy source and fuel. While both proton exchange membrane and anion exchange membrane water electrolysis (AEMWE) exist, the widespread adoption of AEMWE faces challenges due to the low ionic conductivity and chemical/mechanical instability of anion exchange membranes (AEMs). To overcome these hurdles and increase market penetration, there's a need to develop AEMs with low resistance and high durability, necessitating comprehensive research on the entire polymer structu

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Shang, Zhihao, Ryszard Wycisk, and Peter Pintauro. "Electrospun Composite Proton-Exchange and Anion-Exchange Membranes for Fuel Cells." Energies 14, no. 20 (2021): 6709. http://dx.doi.org/10.3390/en14206709.

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A fuel cell is an electrochemical device that converts the chemical energy of a fuel and oxidant into electricity. Cation-exchange and anion-exchange membranes play an important role in hydrogen fed proton-exchange membrane (PEM) and anion-exchange membrane (AEM) fuel cells, respectively. Over the past 10 years, there has been growing interest in using nanofiber electrospinning to fabricate fuel cell PEMs and AEMs with improved properties, e.g., a high ion conductivity with low in-plane water swelling and good mechanical strength under wet and dry conditions. Electrospinning is used to create

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Pismenskaya, Natalia, Veronika Sarapulova, Anastasia Klevtsova, Sergey Mikhaylin, and Laurent Bazinet. "Adsorption of Anthocyanins by Cation and Anion Exchange Resins with Aromatic and Aliphatic Polymer Matrices." International Journal of Molecular Sciences 21, no. 21 (2020): 7874. http://dx.doi.org/10.3390/ijms21217874.

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This study examines the mechanisms of adsorption of anthocyanins from model aqueous solutions at pH values of 3, 6, and 9 by ion-exchange resins making the main component of heterogeneous ion-exchange membranes. This is the first report demonstrating that the pH of the internal solution of a KU-2-8 aromatic cation-exchange resin is 2-3 units lower than the pH of the external bathing anthocyanin-containing solution, and the pH of the internal solution of some anion-exchange resins with an aromatic (AV-17-8, AV-17-2P) or aliphatic (EDE-10P) matrix is 2–4 units higher than the pH of the external

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Düerkop, Dennis, Hartmut Widdecke, Carsten Schilde, Ulrich Kunz, and Achim Schmiemann. "Polymer Membranes for All-Vanadium Redox Flow Batteries: A Review." Membranes 11, no. 3 (2021): 214. http://dx.doi.org/10.3390/membranes11030214.

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Redox flow batteries such as the all-vanadium redox flow battery (VRFB) are a technical solution for storing fluctuating renewable energies on a large scale. The optimization of cells regarding performance, cycle stability as well as cost reduction are the main areas of research which aim to enable more environmentally friendly energy conversion, especially for stationary applications. As a critical component of the electrochemical cell, the membrane influences battery performance, cycle stability, initial investment and maintenance costs. This review provides an overview about flow-battery ta

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