Design of coral-like P5ICA/Ov-MoO3 composites with oxygen vacancy for electrochromic supercapacitors

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161626 - 161626

Published: March 1, 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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Machine learning-accelerated discovery of polyimide derivatives for high-temperature electrostatic energy storage

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104266 - 104266

Published: April 1, 2025

Language: Английский

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