Synthesis and properties of a new ether-free poly(bis-alkylpiperidinium) polymer for the anion exchange membrane

Wang, Tingting; Dong, Jianxin; Yu, Na; Tang, Weiqin; Jin, Yaping; Xu, Yan; Yang, Jingshuai

doi:10.1016/j.eurpolymj.2022.111271

Cited by 14 publications

(15 citation statements)

References 59 publications

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“…The reason maybe that the high IEC provides much power for ion transport, and the excellent microphase separation structure builds more ion transport channels for the PMDBP- x . 29,32 However, the continued increase in the proportion of biphenyl units resulted in a decrease in OH − conductivity. This may be due to the fact that with the addition of the biphenyl unit, the spatial structure of the membrane changes resulting in a decrease in water absorption, which in turn causes a decrease in ionic conductivity.…”

Section: Resultsmentioning

confidence: 99%

A novel anion exchange membrane comprised of three aromatic units for fuel cells

Zheng,

Huang,

Hua

et al. 2024

High Performance Polymers

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Anion exchange membrane fuel cell (AEMFC) has made great progress recently due to the continuous improvement of anion exchange membrane (AEM). Aryl ether bond-free membranes are considered to be promising for improving the overall performance of AEMs. Here, we present a copolymer consisting of m-terphenyl, diphenyl ethane and biphenyl (PMDBP) to further enhance the microphase separation structure by introducing a third structural unit, biphenyl. Meanwhile, the more compact biphenyl structure enhances the mechanical strength of AEMs. Specifically, PMDBP AEMs possess superior OH- conductivity (up to 113 mS cm−1) and excellent mechanical properties (tensile strength up to 42 MPa). Furthermore, the PMDBP has an outstanding single-cell performance with a peak power density (PPD) of up to 95 mW cm−2 with a platinum-carbon (Pt/C) catalyst at 80°C in H2-air. In addition, PMDBP is provided with excellent durability, including NMR spectral consistency and over 90% ion conductivity retention in 1 M NaOH at 60°C for 720 h. This study provided a copolymer structure suitable for anion exchange membrane that can provide excellent performance for fuel cells and electrolyzers.

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Section: Resultsmentioning

confidence: 99%

A novel anion exchange membrane comprised of three aromatic units for fuel cells

Zheng,

Huang,

Hua

et al. 2024

High Performance Polymers

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“…1 The function of AEMs is to separate the cathode fuel from the anode fuel of fuel cells while assisting in the transfer of hydroxide ions (OH − ) from the cathode to the anode. 2 AEMs are mainly composed of polymer skeletons and cationic groups, which determine the various properties of AEMs. 3 The ionic conductivity of AEMs is largely influenced by the water molecules surrounding the side chain cations.…”

Section: Introductionmentioning

confidence: 99%

“…Anion exchange membranes (AEMs) are key components of anion exchange membrane fuel cells (AEMFCs), and their performance and lifespan directly determine the performance and lifespan of AEMFCs . The function of AEMs is to separate the cathode fuel from the anode fuel of fuel cells while assisting in the transfer of hydroxide ions (OH – ) from the cathode to the anode . AEMs are mainly composed of polymer skeletons and cationic groups, which determine the various properties of AEMs .…”

Section: Introductionmentioning

confidence: 99%

Study on AEMs with Excellent Comprehensive Performance Prepared by Covalently Cross-Linked p-Triphenyl with SEBS Remotely Grafted Piperidine Cations

Wang,

Sun,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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A series of SEBS-C6-PIP-yPTP (y = 0−15%) AEMs with good mechanical and chemical stability were prepared by combining the strong rigidity of p-triphenyl, good toughness of SEBS, and excellent stability of PIP cations. After the introduction of a p-triphenyl polymer into the main chain, a clear hydrophilic− hydrophobic phase separation structure was constructed within the membrane, forming a continuous and interconnected ion transport channel to improve ion transport efficiency. Moreover, the molecular chains of the cross-linked AEMs change from chain-like to networklike, and the tighter binding between each molecule increases the tensile strength. The special structure of the six-membered ring makes PIP have a significant constraint effect; when nucleophilic substitution and Hoffman elimination occur at the α and β positions, the required transition state potential energy increases, making the reaction difficult to occur and improving the alkaline stability of the polymer membrane. The SEBS-C6-PIP-15%PTP membrane has the best mechanical properties (Ts = 38.79 MPa, Eb = 183.09% at 80 °C, 100% RH), the highest ion conductivity (102.02 mS. cm −1 at 80 °C), and the best alkaline stability (6.23% degradation at 80 °C in a 2 M NaOH solution for 1400 h). It can be seen that organic−organic covalent cross-linking is an effective means to improve the comprehensive performance of AEMs.

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“…One of the core components of anion exchange membrane fuel cells (AEMFCs) is the anion exchange membrane (AEM), which has the function of isolating the cathode and anode fuel and transporting OH – ions. , After the efforts of many researchers, the research on AEMs has made great progress, but there are still some problems (poor alkali stability and mechanical properties and the resulting instability of ionic conductivity), , which limits their further application and development. Therefore, improving the alkali resistance, mechanical properties, and ionic conductivity of AEMs has become the focus of research.…”

Section: Introductionmentioning

confidence: 99%

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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Synthesis and properties of a new ether-free poly(bis-alkylpiperidinium) polymer for the anion exchange membrane

Cited by 14 publications

References 59 publications

A novel anion exchange membrane comprised of three aromatic units for fuel cells

A novel anion exchange membrane comprised of three aromatic units for fuel cells

Study on AEMs with Excellent Comprehensive Performance Prepared by Covalently Cross-Linked p-Triphenyl with SEBS Remotely Grafted Piperidine Cations

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

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