Quaternary ammonium-functionalized crosslinked poly(aryl ether sulfone)s anion exchange membranes with enhanced alkaline stability for water electrolysis

Qian, Jiafeng; Wang, Chenyi; Zhang, Xiaojing; Hu, Jianxiong; Zhao, Xiaoyan; Li, Jian; Ren, Qiang

doi:10.1016/j.memsci.2023.121946

Cited by 19 publications

(4 citation statements)

References 48 publications

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“…The prepared m - p -TP- x -BOP-ASU has excellent mechanical properties and a high ionic conductivity. In addition, the prepared m - p -TP- x -BOP-ASU has a high current density of 1.96 A cm –2 at 2.0 V, which is higher than some AEMs reported in recent research, ,,,,− ,, as shown in Figure f and Table S1.…”

Section: Resultsmentioning

confidence: 59%

Twisted Poly(p-terphenyl-co-m-terphenyl)-Based Anion Exchange Membrane for Water Electrolysis

Zhang,

Ma,

Tian

et al. 2024

ACS Appl. Mater. Interfaces

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In order to improve the mechanical and water electrolysis performance of anion exchange membranes (AEMs), we adjusted the ratio between p-terphenyl and m-terphenyl to balance the backbone conformation, which gives it a better suitability for a better combination with cations. The results showed that poly(m-terphenyl-co-p-terphenyl)-based AEMs have excellent mechanical properties. Among them, the m-p-TP-40-BOP-ASU membrane has the highest tensile strength and elongation at break (75.72 MPa and 16.07%). The ionic conductivity reaches 137.14 mS cm −1 at 80 °C owing to the fact that efficient ion-conducting channels are formed by well-balanced molecular structures. The current density of the m-p-TP-40-BOP-ASU membrane reached 1.96 A cm −2 (1 M KOH aq, 2.0 V and 60 °C). After testing for 112 h under a current density of 500 mA cm −2 , the voltage increased by 102 mV compared to the initial electrolysis voltage. All results have shown that m-p-TP-x-BOP-ASU has excellent electrolysis performance and electrochemical durability and has a promising application prospect in AEM water electrolyzers.

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Section: Resultsmentioning

confidence: 59%

Twisted Poly(p-terphenyl-co-m-terphenyl)-Based Anion Exchange Membrane for Water Electrolysis

Zhang,

Ma,

Tian

et al. 2024

ACS Appl. Mater. Interfaces

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“…[21] A subtle CÀ N + characteristic vibration at 1112 cm À 1 further corroborated the successful synthesis of the PAF-TMA-6-Br À coating. [22] When comparing the FT-IR spectra of PAF-TMA-6-Br À coating with that of the PAF-TMA-6-Br À powder formed in solution, the similarity in the positions of infrared characteristic vibrations indicates that the powder and the coating have identical composition. The infrared spectra of PAF-TMA-9 and PAF-TMA-3 are further shown in Figure S2.…”

Section: Resultsmentioning

confidence: 99%

Ultrathin Free‐Standing Porous Aromatic Framework Membranes for Efficient Anion Transport

Du,

Liu,

Yin

et al. 2024

Angew Chem Int Ed

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Porous aromatic frameworks (PAFs) show promising potential in anionic conduction due to their high stability and customizable functionality. However, the insolubility of most PAFs presents a significant challenge in their processing into membranes and subsequent applications. In this study, continuous PAF membranes with adjustable thickness were successfully created using liquid‐solid interfacial polymerization. The rigid backbone and the stable C−C coupling endow PAF membrane with superior chemical and dimensional stabilities over most conventional polymer membranes. Different quaternary ammonium functionalities were anchored to the backbone through flexible alkyl chains with tunable length. The optimal PAF membrane exhibited an OH‐ conductivity of 356.6 mS∙cm‐1 at 80 °C and 98% relative humidity. Additionally, the PAF membrane exhibited outstanding alkaline stability, retaining 95% of its OH− conductivity after 1000 hours in 1M NaOH. To the best of our knowledge, this is the first application of PAF materials in anion exchange membranes, achieving the highest OH− conductivity and exceptional chemical/dimensional stability. This work provides the possibility for the potential of PAF materials in anionic conductive membranes.

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“…The FTIR spectra of PAES show characteristic peaks that correspond to the vibrational modes of the aryl ether and sulfone groups [35]. The peak at around 1500-1600 cm −1 corresponds to the aryl ring stretching vibration in the aryl ether group.…”

Section: Results and Discussion Characterizationmentioning

confidence: 99%

Enhancing Oil–Water Separation Efficiency with WO3/MXene Composite Membrane

Amari,

Osman,

Boujelbene

et al. 2024

Water

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In this study, a novel method for the high-performance treatment of oily wastewater was introduced using a tungsten (VI) oxide (WO3)/MXene composite membrane based on poly (arylene ether sulfone) (PAES). Composite membranes were fabricated with superhydrophilic (SH) and superoleophobic (SO) characteristics, which allow for the high-performance treatment of oily wastewater. The fabricated composite membrane can also photodegrade organic types of pollutants with just a short period of UV, enabling self-cleaning and anti-fouling properties. Moreover, the comprehensive characterization of the composite membrane through FTIR, SEM, and XRD analyses yielded valuable insights. The FTIR analysis revealed the characteristic peaks of WO3, MXene, PAES, and the synthesized composite membrane, providing essential information on the chemical composition and properties of the materials. The XRD results demonstrated the crystal structures of WO3, MXene, PAES, and the synthesized composite membrane, further enhancing our understanding of the composite membrane. Additionally, the SEM images illustrated the surface and cross-section of the fabricated membranes, highlighting the differences in pore size and porosity between the PAES membrane and the WO3–MXene composite membrane, which directly impact permeate flux. The study showed that the composite membrane had a remarkable recovery time of only 0.25 h, and the efficiency of the separation process and water flux recovered to 99.98% and 6.4 L/m2.h, respectively. The joint influence of WO3 and MXene on composite membranes degraded contaminants into non-polluting substances after sunlight irradiation. This process effectively solves the treatment performance and decrease in permeate flux caused by contamination. The technology is membrane-based filtration, which is a simple and advanced method for treating polluted water. This innovative work offers promising solutions to address water pollution challenges and holds potential for practical applications from a self-cleaning and anti-fouling point of view.

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Quaternary ammonium-functionalized crosslinked poly(aryl ether sulfone)s anion exchange membranes with enhanced alkaline stability for water electrolysis

Cited by 19 publications

References 48 publications

Twisted Poly(p-terphenyl-co-m-terphenyl)-Based Anion Exchange Membrane for Water Electrolysis

Twisted Poly(p-terphenyl-co-m-terphenyl)-Based Anion Exchange Membrane for Water Electrolysis

Ultrathin Free‐Standing Porous Aromatic Framework Membranes for Efficient Anion Transport

Enhancing Oil–Water Separation Efficiency with WO3/MXene Composite Membrane

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