Macromolecule Crosslinked Hydroxide Exchange Membranes with Low Ammonia Crossover for Direct Ammonia Fuel Cells

Journal of Membrane Science, Journal Year: 2025, Volume and Issue: unknown, P. 123862 - 123862

Published: Feb. 1, 2025

Language: Английский

---

Anion exchange membranes from microporous poly(arylene piperidinium)-based polymers containing spirobifluorene structure

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128117 - 128117

Published: Jan. 1, 2025

Language: Английский

---

Highly Alkaline Stable Crosslinked Piperidine‐Functionalized Polynorbornene Anion Exchange Membranes

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

Published: April 23, 2025

ABSTRACT The balance between long‐term stability, size and ion conductivity of anion exchange membranes (AEMs) under alkaline conditions is a key issue in their development. This article improves the stability membrane by selecting main chains functional groups with good using block crosslinking methods. A series different degrees, aPNB‐O‐DiPD‐x, were prepared pyridine group excellent alkali resistance as cationic 1,3‐di‐4‐pyridinylpropane (DiPD) agent. Compared to uncrosslinked membranes, crosslinked significantly increase tensile strength successfully suppress swelling phenomenon caused excessive water absorption. AFM SAXS tests show that has clear phase separation structure. aPNB‐O‐DiPD‐5 at 80°C 88.85 mS cm −1 , it still retains 85.8% after soaking 1 M sodium hydroxide solution for 840 h. In summary, presence network micro aPNB‐O‐DiPD‐x not only suppresses absorption but also membrane. At same time, which certain potential fuel cells.

Language: Английский

---

Polynorbornene copolymers combining flexible ether side chains and rigid hydrophobic segments for AEMWE

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A polynorbornene-based membrane material is characterized, demonstrating excellent performance in PGM-free, dry cathode mode anion exchange water electrolysis (AEMWE).

Language: Английский

---

Side-chain sterically induced directional units construct stable and continuous ion transport channels for anion exchange membranes

Journal of Membrane Science, Journal Year: 2025, Volume and Issue: unknown, P. 124191 - 124191

Published: May 1, 2025

Language: Английский

---

Designing Highly Conductive Anion Exchange Membranes: Tuning Domain Continuity with ABC Block Copolymer Self-Assembly

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Anion exchange membranes (AEMs) play a critical role in clean energy devices, and optimizing their performance requires deeper understanding of morphology-performance relationships. This study investigates ABC triblock terpolymer AEMs to explore how domain continuity influences hydroxide conductivity, water uptake, dimensional stability. High molecular weight terpolymers were synthesized through the controlled vinyl-addition polymerization norbornene monomers functionalized with alkyl, benzyl, or bromobutyl substituents. Morphology was systematically varied across series without significantly changing ion capacity (IEC) polymer by adjusting alkyl/benzyl block length ratio. Solution-cast films exhibited either 2D-continuous lamellar 3D-co-continuous network phase morphologies, largely retained after cationic functionalization. domains demonstrated superior performance, including enhanced stability competitive conductivities up 84 mS/cm at 25 °C 131 80 °C. work highlights self-assembly can be leveraged investigate relationships achieve highly conductive, durable AEMs.

Language: Английский

---

Chitosan-Based Anion Exchange Membranes for Fuel Cell Application: Enhanced Hydration & Durability to Dry-Wet Cycling

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: unknown, P. 123389 - 123389

Published: Oct. 1, 2024

Language: Английский

---