Journal of Membrane Science, Journal Year: 2025, Volume and Issue: unknown, P. 123982 - 123982
Published: March 1, 2025
Language: Английский
Chemistry - An Asian Journal, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 26, 2025
Abstract With the increasing demand for clean energy, driven by advancements in science and technology, anion exchange membrane fuel cells (AEMFCs) have emerged as a promising solution efficient energy conversion. As core component of AEMFCs, membranes (AEMs) are crucial ion transport separation cathode anode. The performance AEMs primarily depends on two key factors: ionic conductivity stability, which often require delicate balance. conduction process is closely linked to membrane's microscopic structure. This concept article reviews development various AEM types, including homogeneous polymer membranes, hybrid nanoporous framework with focus their structural characteristics. Additionally, it explores design optimization relation properties such conductivity, dimensional alkali resistance, providing reference future innovations ion‐exchange AEMFCs.
Language: Английский
Citations
1
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 509, P. 161210 - 161210
Published: March 4, 2025
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)
Published: June 11, 2024
Abstract The precise manipulation of the microstructure (pore size, free volume distribution, and connectivity free‐volume elements), thickness, mechanical characteristics membranes holds paramount significance in facilitating effective utilization self‐standing membranes. In this contribution, synthesis two innovative ester‐linked covalent–organic framework (COF) is first reported, which are generated through selection plant‐derived ellagic acid quercetin phenolic monomers conjunction with terephthaloyl chloride as a building block. optimization these COF systematically achieved application three different interfacial electric field systems: neutrality, positive electricity, negative electricity. It observed that positively charged system facilitates record increase rate membrane formation, resulting denser uniform pore size enhanced flexibility. addition, correlation identified wherein an alkyl chain length surfactants leads to more decrease molecular weight cutoff membrane. exhibits unprecedented combination high water permeance, superior sieving capability, robust strength, chemical robustness for promising membrane‐based separation science technology.
Language: Английский
Citations
8
Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 700, P. 122706 - 122706
Published: March 25, 2024
Language: Английский
Citations
7
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Sept. 17, 2024
Language: Английский
Citations
7
Chemical Science, Journal Year: 2024, Volume and Issue: 15(20), P. 7576 - 7585
Published: Jan. 1, 2024
A series of N -arylated viologens with terminal aldehyde groups has been synthesized. The new building blocks were successfully used to construct solution-processible, redox-active ionic porous polymers, for high-performance electrochromic films.
Language: Английский
Citations
5
Small, Journal Year: 2024, Volume and Issue: unknown
Published: June 5, 2024
Abstract Covalent−organic framework (COF) membranes are increasingly used for many potential applications including ion separation, fuel cells, and batteries. It is of central importance to fundamentally quantitatively understand transport in COF membranes. In this study, a series designed with different densities arrangements functional groups subsequently utilize molecular simulation provide microscopic insights into these The membrane single‐sided layer exhibits the highest chloride (Cl − ) conductivity 77.2 mS cm −1 at 30 °C. Replacing double‐sided or changing arrangement leads decrease Cl up 33% 53%, respectively. revealed that electrostatic repulsion between ions serves as driving force facilitate positions determine direction repulsion. Furthermore, ordered pores generate concentrated allow rapid transport. This study offers bottom‐up inspiration on design new moderate density proper achieve high conductivity.
Language: Английский
Citations
5
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Aug. 9, 2024
Membrane reactors are known for their efficiency and superior operability compared to traditional batch processes, but limited diversity poses challenges in meeting various reaction requirements. Herein, we leverage the molecular tunability of covalent organic frameworks (COFs) broaden applicability membrane reactors. Our COF demonstrates an exceptional ability achieve complete conversion just 0.63 s at room temperature-a benchmark Knoevenagel condensation. This performance significantly surpasses that corresponding homogeneous catalyst powder by factors 176 375 turnover frequency, respectively. The enhanced concentration reactants rapid removal generated water within greatly accelerate reaction, reducing apparent activation energy. Consequently, this reactor enables reactions unattainable using both powders catalysts. Considering versatility, our findings highlight substantial promise COF-based transformations.
Language: Английский
Citations
4
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(50)
Published: Aug. 13, 2024
Abstract The conventional covalent organic framework (COF)‐based electrolytes with tailored ionic conducting behaviors are typically fabricated in the powder morphology, requiring further compaction procedures to operate as solid electrolyte tablets, which hinders large‐scale manufacturing of COF materials. In this study, we present a feasible electrospinning strategy prepare scalable, self‐supporting membranes (COMs) that feature rigid skeleton bonded flexible, lithiophilic polyethylene glycol (PEG) chains, forming an ion conduction network for Li + transport. resulting PEG‐COM exhibit enhanced dendrite inhibition and high conductivity 0.153 mS cm −1 at 30 °C. improved stems from loose pairing structure production higher free content, confirmed by solid‐state 7 NMR experiments. These changes local microenvironment facilitate its directional movement within COM pores. Consequently, symmetrical Li|Li, Li|LFP, pouch cells demonstrate excellent electrochemical performance 60 This offers universal approach constructing scalable COM‐based electrolytes, thereby broadening practical applications COFs lithium metal batteries.
Language: Английский
Citations
4
Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 31, 2025
Abstract The advancement of nanofluidic membranes is critical for mimicking bioelectrogenic ion‐channel mechanisms and boosting output power density, essential sustainable energy applications. conversion efficiency these devices significantly relies on the ion conductivity permselectivity membranes. Membranes with aligned one‐dimentional (1D) pores, high pore organized dangling ionic groups are theorized to offer superior permeability selectivity, yet configurations remain underexplored. Herein, successful fabrication oriented covalent organic framework (COF) presented. These exhibit precisely cationic anionic sites within their channels, achieved through post‐synthetic modification using click chemistry, which shows conductivity. When incorporated into full‐cell thermo‐osmotic generators, deliver an impressive density 195 W m −2 under a 50‐fold salinity gradient (NaCl: 0.01 ‖ 0.5 ) along 35 K temperature differential. This substantially increases 2.41 times 471 −2 when enhanced tenfold, surpassing performance existing similar conditions thus offering promising avenue enhancing in resource utilization.
Language: Английский
Citations
0