Substantially Enhanced Performance of Proton Exchange Membranes by Metal–Imidazole Coordination within Metal–Organic Framework

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Metal–organic frameworks (MOFs) are often used as proton conductor fillers to enhance the conductivity of hybrid membranes. It is interesting but still challenging discuss influence molecular morphology and distribution carriers within MOFs on their exchange membranes (PEMs) overall performance. In this work, two types imidazole-loaded conductors were synthesized based MIL-101(Cr), with one containing free imidazole molecules other coordinating Cr-metal sites. Furthermore, series composite (CPM/IM-x CPM@IM-x, x = 1, 2, 3) fabricated using filler a cross-linked poly(vinyl alcohol) (CL-PVA) that contains both hydrophilic hydrophobic structures matrix. The CPM/IM coordinated exhibit significantly enhanced water affinity, stability, ion capacity. This mainly due improving two-phase dispersion, promoting deprotonation, facilitating low-energy-barrier transport, while CPM@IM relatively lower higher activation energy (Ea). Surprisingly, CPM/IM-2 membrane can reach up 2.7 × 10–2 S cm–1 at 85 °C 90% RH, lowest Ea 20.9 kJ/mol. remarkable performance indicates more efficient H+ transportation. Moreover, single-cell power density 89.7 mW cm–2, proving it exhibits high potential application prospects for hydrogen-based fuel cells.

Language: Английский

Ionic liquid functionalized ZIF-8 modified PVDF nanofiber-based composite proton exchange membranes towards direct methanol fuel cells applications

Journal of Membrane Science, Journal Year: 2025, Volume and Issue: unknown, P. 123990 - 123990

Published: March 1, 2025

Language: Английский

Construction of New Proton Transport Channels in Composite Proton Exchange Membranes by Incorporating Tannic Acid-Coated Sulfonic Acid-Amino Bi-Functionalized MOFs

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 19, 2025

Language: Английский