Recent Advances in Architectural Designs and Fabrication Strategies of 2D Fillers in Polymer-based Dielectric Nanocomposites

Materials Today Energy, Journal Year: 2025, Volume and Issue: 48, P. 101800 - 101800

Published: Jan. 5, 2025

Language: Английский

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Scalable all-organic polymer dielectrics for high-temperature film capacitors with construction of deep-trap level and cross-linking network

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160204 - 160204

Published: Feb. 1, 2025

Language: Английский

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Regulating Carrier Transport Behavior for Capacitive Energy Storage of Polymer Dielectrics in Harsh Environments

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

Published: March 27, 2025

Abstract Polymer dielectrics with high capacitive energy‐storage levels in harsh environments have become key components electrostatic capacitors. However, excessive losses polymer caused by carrier densities at temperatures and strong electric fields often result low energy storage efficiency, which is the most challenging problem that urgently needs to be solved. In existing studies, are mainly suppressed limiting formation; however, it very completely limit formation, especially fields. Therefore, this perspective proposes regulate transport behavior through “guiding/constraining/blocking” forms rather than previously oversimplified limitation strategy, further clarifies dominant structure factors inhibit reduce enhance efficiency. Meanwhile, influence of different structural designs on behavior, individually or collaboratively, must systematically studied determine specific mode thereby establishing a relationship between The presented expected offer novel effective theoretical basis for design fabrication advanced environments.

Language: Английский

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Remarkably boosted high-temperature energy storage of a polymer dielectric induced by polymethylsesquioxane microspheres

Materials Horizons, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The polymethylsesquioxane (PMSQ) microspheres can remarkably enhance the energy storage performance of a polymer dielectric at high temperatures.

Language: Английский

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Bio-inspired PEI/BNNS composite film via hydrogen bond self-assembly for efficiently enhancing high-temperature dielectric energy storage

Composites Communications, Journal Year: 2025, Volume and Issue: unknown, P. 102266 - 102266

Published: Jan. 1, 2025

Language: Английский

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All-Organic Aramid Films with High Temperature Resistance and Electrical Insulation by Introducing Interfacial Hydrogen Bonds

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

Published: Feb. 6, 2025

Although aramid nanofibers (ANFs) consist of rigid poly(terephthalic acid terephthalamide) molecular chains with good high temperature resistance for aerospace and other high-temperature applications, it has poor electrical insulation properties due to internal defects. Currently, the main method improve is introduce wide band gap two-dimensional (2D) fillers, such as Boron Nitride Nanosheets (BNNS) or mica flakes, but this inevitably affects mechanical optical transparency. Cellulose acetate (CA) originated from acetylation natural cellulose, higher number hydrogen bond donors on chain enables interbond many polymers. In study, CA was introduced into ANFs films, all-organic films were prepared by blade coating method. A dielectric constant 14.4 well a low loss (0.062 @103 Hz) obtained, all lower than that which attributed introduction interfacial bonds suppressed loss. addition, deep traps inside further improved in breakdown strength 216.11 MV/m film 367.8 5 film. The also showed excellent flexibility resistance, performance under different extreme environments still films. This study provides preparation resistant electrically insulating have great potential applications fields relating circumstance.

Language: Английский

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Ultrafast Thermal Conduction of Phase Change Fiber Enabled by Sheath Confinement‐Induced Ordered Orientation of Hydroxylated BNNs

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

Published: March 5, 2025

Phase change fibers (PCFs) are increasingly popular in thermal storage and release applications, such as temperature management. However, a simple but effective integration of conductive materials into PCFs to deliver ultrafast conduction remains big challenge. Herein, facile one-pot coaxial wet spinning strategy based on sheath-confinement-induced orientation arrangement hydroxylated boron nitride nanosheets (BNNs-OH) is proposed fabricate the high-performance PCFs. For core-sheath PCFs, cellulose nanofiber (CNF)-reinforced paraffin (CNF/PW) emulsions serve phase core, while dissolved well-dispersed BNNs-OH act sheath precursor. By increasing extrusion speed liquid contraction fiber gradually finalized induce alignment confinement effect. Consequently, highly oriented (f = 0.8) endow with high transition enthalpy (125.1 J g-1), excellent conductivity (10.15 W m-1K-1), rapid heat transfer rate (1.6 cm s-1); moreover, as-prepared show good tensile strength (11.21 MPa) leakage-proof (0.13%). The combined thermochromic dyes for functional fabrics or applied management phone, demonstrating dissipation.

Language: Английский

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Significantly Enhancing the High‐temperature Breakdown and Capacitive Performances of Dielectric Polymers via Incorporating Alumina Nanotubes as Equivalent Crosslinking Points

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

Published: March 7, 2025

Abstract Polymer‐based electrostatic capacitors are important energy storage components in power systems, yet they suffer from low breakdown strength due to the vigorous movement of molecular chains at elevated temperatures. Herein, hollow‐structured alumina nanotubes prepared by an ion exchange method and introduced into polyetherimide films. In this design, act as equivalent crosslinking points which can restrain polymer that pass through nanotubes. Meanwhile, wide bandgap trap scatter charges further contribute enhancement strength. Accordingly, when merely 0.3 wt.% incorporated film, a significantly boosted 679.54 MV m −1 , is 143.80% pure polyetherimide, achieved 200 °C. Consequently, ultrahigh density 6.54 J cm −3 (efficiency > 90%), reaches 641.18% pristine (1.02 ), obtained This work provides innovative strategy, i.e., constructing points, greatly enhance high‐temperature pulsed performances dielectrics.

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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Ultra-High Capacitive Energy Storage at 200 °C Achieved in Polyetherimide-Based Nanocomposites by Metal/Ceramic Composite Design

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180227 - 180227

Published: April 1, 2025

Language: Английский

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