Polycarbazole-based anion exchange membranes containing flexible side-chain linked piperidine pendants for alkaline fuel cells

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 707, P. 123031 - 123031

Published: June 24, 2024

Language: Английский

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Turning poly(isatin biphenyl) anion exchange membranes by copolymerization and branching

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 710, P. 123157 - 123157

Published: Aug. 1, 2024

Language: Английский

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Remarkable Conductivity and Durability of Anion Exchange Membrane With Poly(Fluorene‐Terphenyl Piperidinium) Incorporating Graphene Oxide

International Journal of Energy Research, Journal Year: 2025, Volume and Issue: 2025(1)

Published: Jan. 1, 2025

We present a series of organic–inorganic composite membranes containing graphene oxide (GO) and quaternized poly(fluorene‐terphenyl piperidinium) (QPFTP) polymer to enhance ion conductivity physicochemical properties. Utilizing the hydrophilic functional groups robust support GO, membrane accomplishes improved exchange capacity (IEC), swelling ratio, water uptake, electrochemical performance. The interaction between chains facilitated by interface ammonium on oxygen filler support, promotes hydrogen bond formation. Based our experiments results, it was proven that introduction GO improves alkaline stability membrane, optimal content confirmed be 0.7 wt%. Consequently, QPFTP‐GO‐0.7 reaches 198.2 mS cm −1 , demonstrating superior performance compared pristine (126.5 ). Furthermore, single cell achieves power density 347.6 mW −2 in an H 2 /O environment at 60°C. findings from this research are expected contribute advancement anion (AEM) technology, offering insights into design development next‐generation for sustainable energy applications.

Language: Английский

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Block Adamantane‐Contained Poly(Arylether Sulfone)s With Tetra‐Quaternized Side Chains as Anion Exchange Membranes

Journal of Applied Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

ABSTRACT An excellent structural design is critical to the formation of anion exchange membrane (AEM) with a sufficient anti‐swelling and competitive conductivity. Herein, series block adamantane‐contained poly(arylether sulfone)s grafting four‐ionic flexible side chains was prepared for AEM, based on designed strategy combining multi‐ionic side‐chain skeleton. Then dense ionic groups within AEMs promote generation hydrophilic domains phase separation morphology, construct connected ion channels OH − transport. The as‐prepared display high conductivity water uptake (WU) at medium capacity (IEC) low swelling ratio (SR) levels. representative one QBAPAS‐10/10 an IEC value 2.11 meq g −1 exhibits WU 82.5%, SR 24.3%, 98.47 mS cm 80°C. Meanwhile, some related characterizations are also conducted mechanical property, thermal, alkaline stability these AEMs.

Language: Английский

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Functional poly(ionic liquid) with unique zwitterionic structure as efficient catalyst for the conversion of ethylene carbonate to dimethyl carbonate

Smart Molecules, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Dimethyl carbonate (DMC) is an important chemical raw material extensively used in organic synthesis, lithium‐ion battery electrolytes, etc . The primary method for industrial synthesis of DMC involves transesterification between ethylene and MeOH but faces issues with difficult catalyst separation low catalytic activity. Based on the synergistic activity cation anion, this study develops poly(ionic liquid)s [N X PIL][PHO] 3 PIL][Y] varying alkaline sites alkalinity levels. This accomplished by constructing functional polymer monomers containing free radical polymerization nitrogen‐containing groups, polymerizing them suitable cross‐linking a specific ratio before exchanging resulting polymers different anions. Results show that doping groups leads to enhanced basic while appropriate anions provide intensified obtained exhibits superior DMC, yield 91.43% selectivity 99.96% at reaction time 2 h. also investigates impact liquid) cationic structure anion types, as well their interactions, performance. findings reveal restricted interactions anion. these findings, possible mechanism was proposed, providing theoretical support high‐efficiency production DMC.

Language: Английский

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Sulfonate and Ammonium-Grafted Poly(isatin triphenyl) Membranes for the Vanadium Redox Flow Battery

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(17), P. 10727 - 10737

Published: Aug. 21, 2024

As one of the most critical components vanadium redox flow battery (VRFB), ion exchange membrane directly influences efficiency and cycle life. Herein, poly(isatin triphenyl) (PIT) containing a lactam structure devoid ether bonds is synthesized from isatin p-terphenyl under superacid catalysis. To achieve transport investigate impact side chain end groups on performance, both cationic anionic chains are incorporated into PIT using glycidyl trimethylammonium chloride (GTA) 1,3-propane sultone (PS) as grafting reagents via ring-opening reactions. Thus, an anion (PIT-GTA) with quaternary ammonium hydroxyl in cation (PIT-PS) sulfonate obtained. Compared to PIT-PS Nafion 115 membranes, PIT-GTA exhibits lower area resistance (AR, 0.22 Ω cm2) reduced permeability (3.08 × 10−8 cm2 min–1), resulting significantly high selectivity value 81.2 104 S min cm–3, which approximately 270 times higher than that (0.3 cm–3). Additionally, displays excellent chemical stability, mass loss less 10% after 960 h test. Due its superior restriction migration, VRFB assembled achieves self-discharge duration 289 h, longer (86 h). In current density range 60–160 mA cm–2, cell equipped demonstrates efficiencies compared 115. Furthermore, based exhibited stability good discharge capacity retention over 1300 cycles testing, indicating enormous potential for application VRFB.

Language: Английский

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Fluorinated poly(p-triphenylene isatin) anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

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Robust Branched Poly(p-terphenyl isatin) Anion Exchange Membranes with Enhanced Microphase Separation Structure for Fuel Cells

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: unknown, P. 123368 - 123368

Published: Sept. 1, 2024

Language: Английский

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Urea‐based construction of hydrogen bonding networks for poly(biphenyl alkylene)s anion exchange membrane for fuel cells

Carbon Neutralization, Journal Year: 2024, Volume and Issue: 3(6), P. 1092 - 1100

Published: Oct. 17, 2024

Abstract In recent decades, the “trade‐off” problem of anion exchange membranes (AEMs) has been a concern. Herein, series urea‐based multication poly(biphenyl alkylene)s AEMs are prepared by obtaining an ether bond‐free backbone through ultra‐strong acid catalysis, grafting it with side chains, and then accessing groups in different ratios. By urea group, noncovalent bonds used to link molecules act as cross‐links, giving them solubility that chemical cross‐links do not have. The PBTA‐DQA‐35U membrane possessed highest ionic conductivity 62.43 mS/cm. Compared PBTA‐DQA (80°C, WU = 20.45%, SR 17.67%), PBTA‐DQA‐25U showed increase water uptake but much change swelling (WU 30.23%, 19.36%), which was attributed fact hydrophilic provide cation transport sites while hydrogen bonding inhibits swelling. is retained above 75% after 960 h alkali stability testing. power density MEA device assembled using 421.78 mW/cm 2 .

Language: Английский

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Hydroxide exchange membranes towards water electrolysis and fuel cells: A review on the recent advances, challenges and opportunities

Advanced Membranes, Journal Year: 2024, Volume and Issue: unknown, P. 100111 - 100111

Published: Nov. 1, 2024

Language: Английский

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