Crosslinked poly(m-terphenyl N-methyl piperidinium)-SEBS membranes with aryl-ether free and kinked backbones as highly stable and conductive anion exchange membranes

Min, Kyungwhan; Chae, Ji Eon; Lee, Yerim; Kim, Hyoung‐Juhn; Kim, Tae‐Hyun

doi:10.1016/j.memsci.2022.120487

Cited by 37 publications

(33 citation statements)

References 67 publications

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“…As shown in Figure b, it was found that no peak glass transition temperature was detected in the test range. This indicated that the mechanical properties of the membrane do not change in this temperature range, which means that at this operating temperature, the morphology of the membrane is stable and has not been damaged …”

Section: Resultsmentioning

confidence: 93%

“…This indicated that the mechanical properties of the membrane do not change in this temperature range, which means that at this operating temperature, the morphology of the membrane is stable and has not been damaged. 14 3.5. Ion Conductivity.…”

Section: Thermal Stability Of Polymeric Membranesmentioning

confidence: 99%

“…Moreover, because the modification of SEBS only takes place in the polystyrene block, there are few effective sites for conducting ions, so the AEM of SEBS still has the problems of low ionic conductivity and easy gelation when the polymer is dissolved . In addition, due to the special aliphatic chain structure of SEBS, most SEBS-based AEMs have high swelling, low dimensional stability, and poor mechanical properties. − Therefore, the research on SEBS-based modified AEM needs to be further optimized.…”

Section: Introductionmentioning

confidence: 99%

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Anion Exchange Membranes Based on Styrene–Ethylene/Butene–Styrene Consist of Two Grafting Forms: N Heterocyclic Cations with Alkyl Intervals and Flexible Long Hydrophobic Side Chains

Wang

Zhang

Sang

et al. 2023

ACS Appl. Energy Mater.

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In view of the problems of poly(styrene–ethylene/butene–styrene) (SEBS) being difficult to dissolve and poor mechanical properties, a series of SEBS-C16D60-DMHP-X (X represents the cationic graft ratio, 20–40%) anion exchange membranes (AEMs) have been prepared. Graft hydrophobic long chains were applied onto the SEBS skeleton to change its solubility, introducing hydrophobic long chains to help construct microphase separation structures and improve ion conductivity (up to 110.22 mS cm–1). The combination of the rigid ring structure in the ring cation with an alkyl spacer and the toughness of the SEBS skeleton, as well as the free folding of alkyl chains, greatly improved the mechanical properties of the AEM, and the swelling ratio of the membrane is well controlled (25.31%, at 80 °C). The alkaline resistance (conductivity decreased only 10.29% after 1400 h of immersion at 80 °C in 2 M NaOH solution) also continuously increased. The structure of this AEM will provide a very meaningful reference for the development of AEMs.

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Section: Resultsmentioning

confidence: 93%

Section: Thermal Stability Of Polymeric Membranesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anion Exchange Membranes Based on Styrene–Ethylene/Butene–Styrene Consist of Two Grafting Forms: N Heterocyclic Cations with Alkyl Intervals and Flexible Long Hydrophobic Side Chains

Wang

Zhang

Sang

et al. 2023

ACS Appl. Energy Mater.

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“…However, electrochemical testing of novel crosslinked AAEM chemistries should proceed in parallel to assist in identifying the most promising strategies for AAEM design. Although many crosslinked AAEMs have been electrochemically tested in rudimentary cell designs, some crosslinked AAEMs have shown relatively promising initial results in hydrogen fuels cells and AEMWEs [ 70 , 74 , 76 , 83 , 84 , 86 , 88 , 93 , 108 , 109 , 118 , 123 , 125 , 153 , 154 , 155 , 156 , 157 , 158 , 159 , 160 , 161 , 162 , 163 ].…”

Section: Application In Electrochemical Reactorsmentioning

confidence: 99%

“…Alternatively, AAEM crosslinking methods can be designed in the absence of a difunctional crosslinker, and instead can be cast as cohesive films with both polymer-bound tertiary amines and halides, which simultaneously undergo Menshutkin quaternization. These procedures are then followed up by TMA solution quaternization to form cations [ 109 , 123 , 154 ].…”

Section: Aaem Design and Crosslinking Strategiesmentioning

confidence: 99%

Tuning Alkaline Anion Exchange Membranes through Crosslinking: A Review of Synthetic Strategies and Property Relationships

et al. 2023

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Alkaline anion exchange membranes (AAEMs) are an enabling component for next-generation electrochemical devices, including alkaline fuel cells, water and CO2 electrolyzers, and flow batteries. While commercial systems, notably fuel cells, have traditionally relied on proton-exchange membranes, hydroxide-ion conducting AAEMs hold promise as a method to reduce cost-per-device by enabling the use of non-platinum group electrodes and cell components. AAEMs have undergone significant material development over the past two decades; however, challenges remain in the areas of durability, water management, high temperature performance, and selectivity. In this review, we survey crosslinking as a tool capable of tuning AAEM properties. While crosslinking implementations vary, they generally result in reduced water uptake and increased transport selectivity and alkaline stability. We survey synthetic methodologies for incorporating crosslinks during AAEM fabrication and highlight necessary precautions for each approach.

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Poly(Ethylene Piperidinium)s for Anion Exchange Membranes

Chen,

Bang,

Tian

et al. 2023

Angewandte Chemie

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The lack of anion exchange membranes (AEMs) that possess both high hydroxide conductivity and stable mechanical and chemical properties poses a major challenge to the development of high‐performance fuel cells. Improving one side of the balance between conductivity and stability usually means sacrificing the other. Herein, we used facile, high‐yield chemical reactions to design and synthesize a piperidinium polymer with a polyethylene backbone for AEM fuel cell applications. To improve the performance, we introduced ionic crosslinking into high‐cationic‐ratio AEMs to suppress high water uptake and swelling while further improving the hydroxide conductivity. Remarkably, PEP80‐20PS achieved a hydroxide conductivity of 354.3 mS cm−1 at 80 °C while remaining mechanically stable. Compared with the base polymer PEP80, the water uptake of PEP80‐20PS decreased by 69 % from 813 % to 350 %, and the swelling decreased substantially by 85 % from 350.0 % to 50.2 % at 80 °C. PEP80‐20PS also showed excellent alkaline stability, 84.7 % remained after 35 days of treatment with an aqueous KOH solution. The chemical design in this study represents a significant advancement toward the development of simultaneously highly stable and conductive AEMs for fuel cell applications.

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Crosslinked poly(m-terphenyl N-methyl piperidinium)-SEBS membranes with aryl-ether free and kinked backbones as highly stable and conductive anion exchange membranes

Cited by 37 publications

References 67 publications

Anion Exchange Membranes Based on Styrene–Ethylene/Butene–Styrene Consist of Two Grafting Forms: N Heterocyclic Cations with Alkyl Intervals and Flexible Long Hydrophobic Side Chains

Anion Exchange Membranes Based on Styrene–Ethylene/Butene–Styrene Consist of Two Grafting Forms: N Heterocyclic Cations with Alkyl Intervals and Flexible Long Hydrophobic Side Chains

Tuning Alkaline Anion Exchange Membranes through Crosslinking: A Review of Synthetic Strategies and Property Relationships

Poly(Ethylene Piperidinium)s for Anion Exchange Membranes

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