Journal of Membrane Science, Год журнала: 2024, Номер unknown, С. 123600 - 123600
Опубликована: Дек. 1, 2024
Язык: Английский
ACS Applied Energy Materials, Год журнала: 2024, Номер unknown
Опубликована: Авг. 30, 2024
Hydrogen is emerging as a strong contender for feasible future energy carrier in the clean race, due to its high density and burning nature. However, account environmental challenges, production must be sustainable cost-efficient. Currently, hydrogen generated from various feedstocks such ammonia, methane, natural gas, biomass, smaller organic molecules, water. These undergo different catalytic processes, including decomposition, electrolysis, steam reforming, pyrolysis, gasification, photoassisted methods photoelectrochemical, biophotolysis, photocatalysis, etc. Among all, research on water electrolysis has garnered much attention because of their carbon free green with use electrolyzers (WEs). On basis recent reports International Renewable Energy Agency (IREA), major types used industry are alkaline (AWE), proton-exchange membrane (PEMWEs), anion-exchange electrolyzer (AEMWE). them, AWEs PEMWEs have inherent drawbacks which need attention. AEMWEs can considered promising alternative by integrating advantages both into one device. In this review, we focused core ideas AEMWEs, where scientific engineering breakthroughs highlighted. It points out importance eliminating gap between electrodes (i.e., zero concept) identifies areas that further development push AEMWE technology forward. offer higher operating current densities pressures, comparable Faradaic efficiencies (>90%), utilization nonprecious metal catalysts along pure feed. Along all these, also advancements deterioration AEMs. Additionally, it provides concise overview performance offers detailed examination developments electrolyte feeding group (non-PGM) electrocatalysts.
Язык: Английский
Процитировано
8
ACS Nano, Год журнала: 2024, Номер 18(47), С. 32694 - 32704
Опубликована: Ноя. 14, 2024
High-performance and durable anion exchange membranes (AEMs) are critical for realizing economical green hydrogen production through alkaline water electrolysis (AWE) or AEM electrosysis (AEMWE). However, existing AEMs require sophisticated fabrication protocols exhibit unsatisfactory electrochemical performance long-term durability. Here we report an fabricated via a one-pot, in situ interfacial Menshutkin reaction, which assembles highly cross-linked polymer containing high-density quaternary ammoniums nanovoids inside reinforcing porous support. This structure endows the membrane with high anion-conducting ability, uptake (but low swelling), mechanical thermochemical robustness. Consequently, assembled achieves excellent AWE (0.97 A cm
Язык: Английский
Процитировано
4
Опубликована: Янв. 1, 2025
For the commercialization of anion exchange membrane fuel cells (AEMFCs), (AEM), which is a key component AEMFCs, requires not only excellent ion conductivity but also high alkaline stability. Therefore, in this study, hybrid composed quaternized poly(phenylene oxide) (QPPO) with dense sites and polyvinyl alcohol (PVA), known for its superior chemical mechanical properties, prepared. The QPPOx-PVAy AEMs (where x y represent weight ratio QPPO PVA) forms hydrogen bonds or electrostatic interactions through dehydration reaction between quaternary ammonium group hydroxyl PVA. This network bonding, resulting enhanced hydrophilicity structural rearrangement, improves dimensional stability membrane. Among prepared AEMs, QPPO85-PVA15 AEM exhibits ionic 79.8 mS cm–1 at 80 °C under 100% RH, low change, appropriate strength. In addition, retains 86.3% initial after 1000 h 2 M NaOH conditions. Thus, overall results demonstrate that incorporation PVA effective producing performance.
Язык: Английский
Процитировано
0
ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 7, 2025
Polymers backbones with free of aryl-ether structures are preferred for producing stable anion exchange membranes (AEMs) suitable alkaline fuel cells. In this study, we utilized the inert all-hydrocarbon polymer poly(styrene-b-isobutylene-b-styrene) (SIBS) as backbone and integrated tertiary amines varying carbon chain lengths to synthesize comb-shaped AEMs via halogenation Menschutkin reaction. The synthesized QSIBS–OH-Cn demonstrated remarkable film-forming capabilities mechanical properties, SAXS analysis revealed presence distinct hydrophilic hydrophobic microphase separation structures, which promote self-assembly ion clusters, resulting in formation interconnected transport pathways within membrane. Therefore, a significant enhancement hydroxide conductivity, reaching up 104 mS cm–1 at 80 °C, marked improvement over their poly(phenylene oxide)-based equivalents. Furthermore, exhibited stability, maintaining 92% conductivity after 1800 h °C 1 M NaOH solution, underscoring significance com-shaped molecular architecture. Finally, QSISBS–OH-Cn QPPO–OH-Cn were single cells operating H2/O2 60 where QSIBS–OH–C12 membrane peak power density 537 mW cm–2 current 670 mA cm–2. Moreover, QSIBS–OH–C6 displayed stability across durability tests cell 120 0.3 V constant voltage. Overall, study emphasizes SIBS thermoplastic triblock integration architectures developing robust AEMs, offering strategic method optimizing design AEMs.
Язык: Английский
Процитировано
0
Fuel, Год журнала: 2025, Номер 395, С. 135169 - 135169
Опубликована: Март 30, 2025
Язык: Английский
Процитировано
0
Batteries, Год журнала: 2025, Номер 11(4), С. 134 - 134
Опубликована: Март 29, 2025
The proton exchange membrane (PEM) is a critical component of fuel cells, responsible for controlling the flow protons while minimizing crossover through its channels. commercial commonly used in cells made Nafion, which expensive and prone to swelling when contact with water. To address these limitations, various polymers have been explored as alternatives replace costly Nafion membrane. Styrene, versatile cost-effective material, has emerged promising candidate. It can be modified into different forms meet requirements cell aromatic rings styrene copolymerize hydrophilic functional groups, enhancing water (H2O) uptake, conductivity, ion capacity (IEC) Additionally, hydrophobic nature helps maintain structural integrity membrane’s channels, reducing excessive crossover. flexible chains facilitate attachment such sulfonic further improving IEC, thermal stability, mechanical strength, oxidative stability. This review article explores application derivatives membranes, focus on (PEMFCs), direct methanol (DMFCs), anion (AEMFCs).
Язык: Английский
Процитировано
0
Materials Today Communications, Год журнала: 2025, Номер unknown, С. 112475 - 112475
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Journal of Membrane Science, Год журнала: 2024, Номер unknown, С. 123600 - 123600
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
1