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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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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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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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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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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Nanocellulose-Based Proton Exchange Membranes with Excellent Dimensional Stability, Superior Mechanical Properties, and High Proton Conductivity via Composite MOF@CNT

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Nanocellulose has shown significant potential in the field of proton exchange membranes (PEMs) because its low cost, biodegradability, excellent thermal stability, and high designability. However, development is limited by mechanical stability conductivity. In this study, cellulose nanofibers (CNFs) nanocrystals (CNCs) were blended as a composite matrix (CNF/CNC), stable metal–organic framework (MOF) with −SO3H (S-UIO-66) was prepared on surface carbon nanotubes (CNTs) via an situ growth procedure. The S-UIO-66@CNT subsequently introduced filler into CNF/CNC dispersion, PEMs formed filtration. itself exhibited certain uniform dispersion due to presence groups; incorporation CNFs/CNCs (CCs) further enhanced S-UIO-66 more unobstructed conduction pathways established membrane. As consequence, resulting PEM (CC/S-UIO-66@CNT-5) developed superior properties (93 MPa) conductivities (0.105 S/cm at 80 °C 100% RH 27 mS/cm 33% RH). addition, battery performance tests showed promising for application fuel cells.

Язык: Английский

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Achieving remarkable capacitive efficiency of pyrochlore type Mn2V2O7 with graphtic carbon nitride (g-C3N4) nanosheets for hybrid supercapacitor applications

Journal of Physics and Chemistry of Solids, Год журнала: 2025, Номер unknown, С. 112705 - 112705

Опубликована: Март 1, 2025

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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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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