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 high-temperature energy storage performance of PEI-based composite dielectrics via ultra-low content of SiC@SiO2 nanoparticles

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 119, P. 116401 - 116401

Published: March 25, 2025

Language: Английский

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Superior Energy Storage Performance Induced by Cross‐Scale Electric Field Modulation Utilizing Hybrid Hierarchical Micro–Nano Fillers in PEI‐based Composites

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

Published: April 25, 2025

Abstract Polymer‐based composites with superior energy storage capabilities are indispensable components for realizing the lightweight architecture of pulsed power systems. Nevertheless, they confront an intrinsic challenge diminution in breakdown strength ( E b ) under extreme conditions high temperature and/or strong electric field, consequently undermining efficacy. Herein, a cross‐scale field modulation strategy is successfully developed sandwich‐structured PEI‐based composites, as characterized by hybrid hierarchical barium titanate (BT) particles middle layer, whereas boron nitride nanosheets (BNNSs) outermost layers. Through this innovative structure, BT not only enhance dielectric properties but also work together BNNSs to create unevenly distributed fields. Additionally, it markedly improves insulation and mitigates Joule heat, ultimately achieving systematic at temperatures. Consequently, composite achieves ultrahigh density U e 21.80 J·cm −3 remarkable efficiency η 96.89% 620 MV·m −1 , surpassing most previously reported polymer‐based composites. Moreover, demonstrates exceptional cycling stability maintains robust performance 150 °C, obtaining outstanding 11.98 87.1% 565 . This provides simple yet highly effective pathway designing

Language: Английский

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Inhibiting molecular motion and charge transport to enhance high-temperature breakdown and energy storage performance of aromatic-free polymer

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 104, P. 114416 - 114416

Published: Nov. 7, 2024

Language: Английский

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