Supramolecular Modifying Nafion with Fluoroalkyl‐Functionalized Polyoxometalate Nanoclusters for High‐Selective Proton Conduction.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(36)

Опубликована: Июнь 19, 2024

Fluoroalkyl-grafted polyoxometalate nanoclusters are used as supramolecular additives to precisely modify the ionic domains of Nafion, which can increase proton conductivity and selectivity simultaneously. The resulting hybrid membranes show significantly enhanced power density in fuel cells improved energy efficiency vanadium flow batteries.

Язык: Английский

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Enhancement of comprehensive performance of high-temperature and low-humidity proton exchange membranes: Crosslinking of trifunctional proton conductor with branched polybenzimidazole

Journal of Membrane Science, Год журнала: 2024, Номер 701, С. 122711 - 122711

Опубликована: Март 28, 2024

Язык: Английский

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Polyoxometalates (POMs) as Proton Conductors

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 1958 - 1998

Опубликована: Март 27, 2025

The development of solid-state proton conductors (SSPCs) is significant interest for their deployment as exchange membranes in fuel cell (PEMFC) technology. aqueous medium synthesis with ample intrinsic sources has made crystalline polyoxometalates (POMs) promising SSPCs over others. Herein, we aim to showcase the solitary POMs and hybrids (with polymers MOFs/COFs) by organizing them based on approaches taken up (intrinsic or extrinsic) install various protonic while positioning within specific components POM frameworks. Particular attention paid a critical discussion whether conductivity purely combination other ionic (majorly originating from charge balancing counterions) thus recommend terminology be used. "Critical Discussion" section provides in-depth insights which are often overlooked, future recommendations "Future Outlook".

Язык: Английский

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Carboxyl‐Driven Water Networks on 2D Metal Organic Frameworks for Enhanced Proton Conduction in PEMFCs

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Abstract Precisely constructing the well‐defined proton transport platform and studying its behavior are of great importance yet remain challenging. Here, a Zr‐BTB‐X nanosheet via post‐synthetic modifying Zr‐BTB with terephthalic acid (BDC) trimesic (BTC) is developed, which coordinate to unsaturated Zr₆ clusters. The increased –COOH groups endow Zr‐BTB‐BTC nanosheets significant improvement in conductivity, achieving 490.9 mS cm −1 at 80 °C 100% RH, compared 2.19 for original nanosheets. Density functional theory calculations water adsorption studies reveal that formation enriched networks induced by facilitates efficient dissociation reduces barrier. assembled lamellar membrane, retaining high conductivity properties nanosheet, reaches 242.4 RH. It also delivers superior performance exchange membrane fuel cell (PEMFC), ultrahigh peak power (0.91 W −2 ), maximum current density (3.59 A good durability (100 h OCV test).

Язык: Английский

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Advanced Nafion/nanofiller composite proton exchange membranes for fuel cell applications

Polymer, Год журнала: 2024, Номер 307, С. 127241 - 127241

Опубликована: Июнь 3, 2024

Язык: Английский

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PGM-free single atom catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells

Chemical Communications, Год журнала: 2024, Номер 60(56), С. 7113 - 7123

Опубликована: Янв. 1, 2024

The progress of proton exchange membrane fuel cells (PEMFCs) in the clean energy sector is notable for its efficiency and eco-friendliness, although challenges remain terms durability, cost power density.

Язык: Английский

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Supramolecular complexation of metal oxide clusters in PVDF-PVP blends for large scale fabrication of proton exchange membranes for fuel cells

Polymer, Год журнала: 2024, Номер 299, С. 126951 - 126951

Опубликована: Март 20, 2024

Язык: Английский

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A composite proton exchange membrane with a three-dimensionally-reinforced hydrogen bonding network for durable hydrogen fuel cells

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(14), С. 4459 - 4468

Опубликована: Янв. 1, 2024

Herein, a composite proton exchange membrane is proposed to realize durable hydrogen fuel cells by incorporating polyphenolamine treated ZrO 2 and ePTFE into perfluorosulfonic acid (PFSA) form 3D-reinforced bonding network.

Язык: Английский

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Flexible supramolecular polymer proton conductors with high mechanical-conductive decoupling ability

Science China Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

Язык: Английский

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Supramolecular Modifying Nafion with Fluoroalkyl‐Functionalized Polyoxometalate Nanoclusters for High‐Selective Proton Conduction.

Angewandte Chemie, Год журнала: 2024, Номер 136(36)

Опубликована: Июнь 19, 2024

Abstract Proton exchange membranes with high selectivity are urgently required in energy and electronic technologies. Although Nafion represents the state‐of‐the‐art commercial proton membrane material,it still suffers from permeation of undesirable substances, like hydrogen fuel cells vanadium ions redox flow batteries, due to unmatched sizes between its ionic domains (3–5 nm) these substances. In this work, we present a supramolecular modification strategy that simultaneously enhances conductivity Nafion. We employ fluoroalkyl‐grafted polyoxometalate (POMs) nanoclusters as additives modify via co‐assembly. These POMs can precisely robustly decorate at domains, their fluoroalkyl chains anchoring into perfluorinated matrix while inorganic clusters stay regions. The hybrid membranes, continuous hopping sites nanoscale steric hindrance offered by POMs, exhibit 56 % increase 100 improvement proton/vanadium selectivity. This leads significantly enhanced power density efficiency respectively. results underscore intriguing potential molecular cluster improving functions ion‐conducting membranes.

Язык: Английский

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