High energy density of poly(vinylidene fluoride)-based all organic dielectric composites via using functional polymethacrylate filler

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 110, P. 115313 - 115313

Published: Jan. 6, 2025

Language: Английский

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Electrostatic interaction bridges the charge transport kinetics and high-temperature capacitive energy storage performance of polymer dielectrics

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(20), P. 7627 - 7648

Published: Jan. 1, 2024

Charge transport in polymer dielectrics can be regulated by constructing a strong electrostatic interaction. Attraction introduces deep traps to restrain charge mobility but repulsion augments the barrier height scatter charges.

Language: Английский

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Pinning and elongating of electric treeing induced by wrinkled nanosheets in polymer dielectrics towards significantly enhanced high-temperature energy storage performance

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

Published: Jan. 1, 2025

The polyetherimide composite with 0.2 wt% alumina nanosheets exhibits pinned, elongated breakdown paths due to wrinkles, achieving an ultrahigh energy density of 8.27 J cm –3 (>90% efficiency) at 150 °C, 420% that pure film.

Language: Английский

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Enhanced Dielectric Properties of Polyetherimide‐Based Nanocomposite Films With Doped Semiconductor Traps

Polymers for Advanced Technologies, Journal Year: 2025, Volume and Issue: 36(3)

Published: March 1, 2025

ABSTRACT The emerging electronic devices demand dielectric polymer films with high energy storage density over a wide temperature range. However, the mobility of charge carriers leads to unsatisfactory performance even for heat‐resistant polymers such as polyetherimide (PEI). Therefore, enhance dielectrics, it is critical concurrently focus on increasing constant and improving breakdown strength by hindering migration electrons, which highly correlated intrinsic bandgap structures dielectrics. Inspired tunable structure doped semiconductors, this work aimed at strengthening trapping depending construction electron traps formation electron–hole pairs, that is, tailor ZnS 1−x O x via oxygen doping band /PEI interface region, thereby significantly enhancing composite films. At room 450 kV mm −1 , ( U d ) 0.4 vol% 0.7 0.3 reaches 5.7 J cm −3 charge–discharge efficiency η 96.6%, 2.3 times pure PEI (2.5 = 86.2%). Moreover, film exhibits excellent stability temperatures. 150°C 350 remains 3.4 89.1%, higher than (1.5 80.6%). This provides novel perspective design high‐performance interfacial engineering.

Language: Английский

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Remarkable High‐Temperature Energy Storage in Co‐Polymerized Polyetherimide Via Constructing Hybrid Electrostatic Potential Barriers

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Abstract High‐temperature dielectric polymers are increasingly attracting significant interest for energy storage applications in harsh environments. However, the exponentially increased conduction losses under high temperatures and elevated electric fields often cause serious degradation of capacitive performance dielectrics. Unlike most reported energy‐level tuning strategies, this study introduces a novel approach that constructs localized electrostatic barriers to enhance high‐temperature polyetherimide (PEI) films. By copolymerizing amide groups MPD (1,3‐Phenylenediamine) PAB (4,4′‐Diaminobenzanilide) into PEI backbone, strong separation effect dipoles is established, leading potentials difference. Density Functional Theory (DFT) proves intermolecular local potential fluctuations generate hybrid (4.2 eV) trap carriers suppress their migration within spatial freedom domain. Consequently, largely suppressed leakage current enhanced breakdown strength yielded co‐10PAB/90MPD polymer, creating density 4.3 J cm −3 ( η > 90%) at 200 °C as comparison original PEI‐MPD (2.1 ), which surpasses polymers. This work demonstrates promising paradigm dipolar regulation molecular level

Language: Английский

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Achieving superior energy storage performance for all-organic PVDF/MG crosslinked composite dielectric films through the cooperation of crosslinking and hydrogen bonding networks

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161485 - 161485

Published: March 1, 2025

Language: Английский

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Interface decoupling and capacitance modulation in flexible laminated polyetherimide-based nanocomposites via hierarchical incorporation

Advanced Composites and Hybrid Materials, Journal Year: 2025, Volume and Issue: 8(2)

Published: March 17, 2025

Language: Английский

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Ultrahigh Energy Charge–Discharge Efficiency in Olefinic Elastomer with POSS Cage‐Linking Construction

Advanced Materials Technologies, Journal Year: 2025, Volume and Issue: unknown

Published: March 22, 2025

Abstract Polymer dielectrics with intrinsic breakdown strength and fast release cycle are promising candidates in energy conversion embedded power systems. However, the charge–discharge efficiency dielectric reliability of polymer film should be further enhanced urgently based on depression loss. In this study, sulfhydryl group modified polyhedral oligosiloxanes (SH‐POSS) nanoparticle, sulfhydryl‐functionalized POSS serves as crosslinking site through reacting unsaturated double bond poly(styrene‐butadiene‐styrene) (SBS) block copolymer. The constant ( ɛ ′) composite retains stable tendency over wide testing frequency, e.g. ′ = 1.79 at 10 6 Hz 1.73 15 GHz for 5 wt.% composite. With presence cage particles sites, viscoelastic hindrance becomes weak, resulting descending dissipative force between inter‐chains, which contributes to hysteresis loss under field on‐off cycle. reaches 97.5% 450 MV m −1 , current exhibits outstanding stability cycles 100 °C . These results indicate that proposed method effectively balances low high insulation demonstrates broad prospects storage/conversion microelectronic packaging stretchable electronics.

Language: Английский

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Enhancement of High‐Temperature Energy Storage in PEI Dielectrics Through Dual‐Function Scattering/Trap Layers

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Abstract Dielectric capacitors are essential for the effective and dependable performance of new energy electronic circuits. However, storage dielectric materials still face significant challenges, including low density poor thermal stability. In this study, polyetherimide (PEI), a high‐temperature‐resistant material, is selected as subject investigation. A bifunctional three‐layer structure designed to effectively regulate charge carriers. The consists scattering electron layer (4‐NB/PEI) containing 4‐(dimethylamino)phenylboronic acid (4‐NB) trapping (F 4 TCNQ/PEI) 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane TCNQ). surface inhibits injection, while intermediate suppresses high‐energy transport, leading carrier regulation. results demonstrate that PEI composite achieves optimal when 2 µm 4‐NB/PEI used layer, with F TCNQ/PEI serving layer. Under these conditions, reaches 6.14 J cm − 3 at 150 °C, an efficiency 93.26%. Furthermore, polarization electric field strength 6.90% higher than homogeneous 4‐NB doping. This improvement due combined effects which blocks transport. Additionally, strong interfacial interactions between layers resist impact.

Language: Английский

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Enhancing Electrical Insulation and Thermal Conductivity in Polymer Through Constructing Energy‐Dissipation Organic Electron Acceptor/Inorganic Filler

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Abstract To address the issue that both electrical insulation and thermal transport performance of materials are hard to enhance synchronously, a trap‐barrier synergistic strategy is proposed utilizes organic electronic acceptor 1,4,5,8‐naphthalenetetracarboxylic anhydride (NDA) modify inorganic filler Al 2 O 3 (AO), resulting in formation AO@NDA, referred as “energy dissipator.” It restricts carrier mobility dissipates energy through effect interactions, thereby enhancing breakdown strength composites. In addition, it further enhanced long‐term effectiveness dissipator by modifying its chemical activity, based on molecular design NDA. The results demonstrate introduction significantly improves properties For example, SG filled with 15 wt.% AO@NDA reaches 18.7 kV mm −1 , which added up 11.7% compared AO/SG at same loading. Moreover, high‐temperature electrically insulating composites also outstanding due their preeminent stability performance. This work will present novel, effective, scalable approach for field power equipment packaging materials.

Language: Английский

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