Poly(spirofluorene)-Based Anion Exchange Membranes for Alkaline Electrochemical Energy Devices DOI
Tao Wang, Weizhe Zhang, Tie Wang

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(11), P. 5461 - 5471

Published: May 28, 2024

Anion exchange membranes (AEMs) with high conductivity and low hydrogen permeability guarantee efficient reliable AEM fuel cells (AEMFCs) water electrolyzers (AEMWEs). In this work, two monomeric spirofluorenes, spiro[cyclopentane-1,9′-fluorene] (CPF) spiro[cyclohexane-1,9′-fluorene] (CHF), were synthesized by a ring-closing reaction further embedded into the poly(arylene alkylene) backbone to lower ion transport resistance without compromising gas barrier property of AEM. The π–π stacking polymer is weakened introduction spirofluorene units, contributing increased intermolecular spacing improved microporous contents. On other hand, despite presence spirocyclic an affordable specific H2 permeation 28 pmol cm–1 s–1 was observed for Moreover, excellent hydroxide 169 mS at 80 °C also recorded owing rapid caused microporosity. Benefiting from good performance AEM, engineered AEMFC based on PCHTPA exhibits peak power density 1.3 W cm–2 in situ durability 330 h. AEMWE shows current 3.2 A 2.0 V Faradaic efficiency 98.4% purity 99.92%.

Language: Английский

Advances in Membrane Separation for Biomaterial Dewatering DOI Creative Commons
Esli Diepenbroek,

Sarthak Mehta,

Zandrie Borneman

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(9), P. 4545 - 4566

Published: Feb. 22, 2024

Biomaterials often contain large quantities of water (50–98%), and with the current transition to a more biobased economy, drying these materials will become increasingly important. Contrary standard, thermodynamically inefficient chemical thermal methods, dewatering by membrane separation provide sustainable efficient alternative. However, biomaterials can easily foul surfaces, which is detrimental performance separations. Improving antifouling properties such membranes key challenge. Other recent research has been dedicated enhancing permeate flux selectivity. In this review, we present comprehensive overview design requirements for advances in using membranes. These developments offer viable solution challenges fouling suboptimal performances. We focus on two emerging development strategies, are use electric-field-assisted surface functionalizations, particular hydrogels. Our concludes critical mention remaining possible directions within subfields.

Language: Английский

Citations

7
Double-skeleton interpenetrating network-structured alkaline solid-state electrolyte enables flexible zinc-air batteries with enhanced power density and long-term cycle life DOI

Xueqi Dong,

Xi Luo,

Xiaohui Yang

et al.

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 672, P. 32 - 42

Published: May 27, 2024

Language: Английский

Citations

7
High-performance side-chain-type anion exchange membranes with triptycene-based hydrophobic segments DOI
Ziqiang Liu,

Kejing Lin,

Weimin Yin

et al.

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 708, P. 123034 - 123034

Published: June 25, 2024

Language: Английский

Citations

7
Uniform Nanoscale Ion-Selective Membrane Prepared by Precision Control of Solution Spreading and Evaporation DOI

Tengfei Bian,

Xiaobing Wang,

Qi Zhang

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(7), P. 2352 - 2359

Published: Feb. 12, 2024

Ion-selective membrane has broad application in various fields, while the present solution-processed techniques can only prepare uniform with microscale thickness. Herein, a high-quality polymer nanoscale thickness and uniformity is precisely prepared by controlling solution spreading solvent evaporation stability/rate. With arrayed capillaries, stable of volume microliter induces formation film micrometers Moreover, fast increase dynamic viscosity during inhibits nonuniform Marangoni flow capillary film. Consequently, Nafion-Li membranes ∼200 nm are prepared, their Li+ conductivity 2 orders magnitude higher than that commercially Nafion-117 membrane. Taking lithium–sulfur battery as model device, cells (capacities 8–10 mAh cm–2) stably operate for 150 cycles at S loading 12 mg cm–2 an electrolyte/sulfur ratio ∼7.

Language: Английский

Citations

6
Poly(spirofluorene)-Based Anion Exchange Membranes for Alkaline Electrochemical Energy Devices DOI
Tao Wang, Weizhe Zhang, Tie Wang

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(11), P. 5461 - 5471

Published: May 28, 2024

Anion exchange membranes (AEMs) with high conductivity and low hydrogen permeability guarantee efficient reliable AEM fuel cells (AEMFCs) water electrolyzers (AEMWEs). In this work, two monomeric spirofluorenes, spiro[cyclopentane-1,9′-fluorene] (CPF) spiro[cyclohexane-1,9′-fluorene] (CHF), were synthesized by a ring-closing reaction further embedded into the poly(arylene alkylene) backbone to lower ion transport resistance without compromising gas barrier property of AEM. The π–π stacking polymer is weakened introduction spirofluorene units, contributing increased intermolecular spacing improved microporous contents. On other hand, despite presence spirocyclic an affordable specific H2 permeation 28 pmol cm–1 s–1 was observed for Moreover, excellent hydroxide 169 mS at 80 °C also recorded owing rapid caused microporosity. Benefiting from good performance AEM, engineered AEMFC based on PCHTPA exhibits peak power density 1.3 W cm–2 in situ durability 330 h. AEMWE shows current 3.2 A 2.0 V Faradaic efficiency 98.4% purity 99.92%.

Language: Английский

Citations

6