Опубликована: Март 21, 2025
Язык: Английский
Journal of Energy Storage, Год журнала: 2025, Номер 110, С. 115313 - 115313
Опубликована: Янв. 6, 2025
Язык: Английский
Процитировано
2
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 7, 2025
Abstract Polymer dielectrics for high‐temperature capacitive energy storage suffer from low density and poor efficiency, which is mainly attributed to the exponential growth of conduction loss at high electric fields. Here, a surface strengthening strategy inhibit electrode‐limited polymer composite reported. The phase strengthened by in situ generated ultrafine silicon oxide (SiO 2 ) nanoparticles while bulk incorporating commercially available SiO nanoparticles. These wide bandgap can not only restrict movement macromolecular chains, but also act as deep traps capture charge carriers. As result, transport electrode/dielectric interface dielectric significantly restrained, thereby leading decrease loss. resultant film deliver discharged 4.26 J cm⁻ 3 200 °C, increased 1274.19% compared with that pristine film. employing suppress be easily extended other polymers improve insulation performances.
Язык: Английский
Процитировано
2
Chemical Engineering Journal, Год журнала: 2024, Номер 491, С. 151634 - 151634
Опубликована: Апрель 30, 2024
Язык: Английский
Процитировано
13
Materials Horizons, Год журнала: 2024, Номер 11(18), С. 4348 - 4358
Опубликована: Янв. 1, 2024
Polymer films are ideal dielectric materials for energy storage capacitors due to their light weight and flexibility, but lower density poor heat resistance greatly limit application in high-temperature storage. Unlike the traditional method of solely adding wide-bandgap inorganic fillers enhance density, this study we constructed trap-rich hybrid covalently cross-linked networks polyetherimide (PEI)
Язык: Английский
Процитировано
12
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Авг. 13, 2024
Abstract Dielectric capacitors play a pivotal role in the advancement of electric power systems and emerging energy technologies. However, deterioration dielectric performance storage materials at elevated temperatures represents significant challenge. In this study, organic electron‐scattering agents into polyetherimide (PEI) are introduced, creating “peaked barrier” to impede charge carrier transport. By doping PEI with an ultralow volume fraction (0.8%) molecule filler 4‐(dimethylamino)phenylboronic acid (4‐NB), electron‐repelling nature 4‐NB is leveraged order regulate injection transport synergistic manner. Consequently, discharged density composite material increases 7.93 J cm − 3 (720 kV mm −1 ) 30 °C. At 150 °C, 5.21 (580 ). both cases, discharge efficiencies maintained 90%. It noteworthy that prepared also exhibits excellent dissipation characteristics, maintaining stable efficiency even after 50 000 charge–discharge cycles. summary, study's design concept systematically optimizes processes injection, transport, dissipation. This approach offers novel perspective for development dielectrics suitable long‐term storage.
Язык: Английский
Процитировано
12
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Сен. 6, 2024
Язык: Английский
Процитировано
11
Energy & Environmental Science, Год журнала: 2024, Номер 17(20), С. 7627 - 7648
Опубликована: Янв. 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.
Язык: Английский
Процитировано
9
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 23, 2025
Abstract Film capacitors are widely used in advanced electrical and electronic systems. The temperature stability of polymer dielectrics plays a critical role supporting their performance operation at elevated temperatures. For the last decade, investigations for new with high energy storage higher temperatures (>200 °C) have attracted much attention numerous strategies been employed. However, there is currently still large gap between lab research large‐scale production. In this review, main effects on dielectric properties analyzed core modification summarized. scientific technological reasons difference practical application also discussed. Further, several processes film preparation typical device structure design reviewed. current product launches pertaining high‐temperature Conclusive insights future perspectives delineated to offer strategic direction ongoing prospective innovation materials.
Язык: Английский
Процитировано
1
Advanced Science, Год журнала: 2025, Номер unknown
Опубликована: Янв. 30, 2025
Abstract Achieving high‐performance dielectric materials remains a significant challenge due to the inherent trade‐offs between high energy storage density and low loss. A central difficulty lies in identifying suitable dipolar unit that can enhance polarity constant of material while effectively suppressing losses associated with polarization relaxation, charge injection, conduction. To address this, novel strategy is proposed introduces electron‐donating electron‐withdrawing substituents on benzene ring polystyrene‐based polymers, creating bulky dipole groups are resistant reorientation under an electric field. This approach mitigates relaxation manipulates band structure via substituent modification suppress conduction losses. Additionally, deformation π ‐electron cloud field enhances density. Ultimately, optimized chlorostyrene‐methyl methacrylate (MMA) copolymer exhibits 85% discharge efficiency 18.3 J cm − 3 , nearly three times styrene‐based copolymers same conditions. study new for designing high‐energy density, low‐loss polymer by precisely controlling effects modulate distribution ‐conjugated electron clouds.
Язык: Английский
Процитировано
1
Applied Materials Today, Год журнала: 2025, Номер 43, С. 102669 - 102669
Опубликована: Март 13, 2025
Язык: Английский
Процитировано
1