Improved Energy Density at High Temperatures of FPE Dielectrics by Extreme Low Loading of CQDs DOI Open Access
Huan Wang, Hang Luo, Yuan Liu

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(14), P. 3625 - 3625

Published: July 22, 2024

Electrostatic capacitors, with the advantages of high-power density, fast charging-discharging, and outstanding cyclic stability, have become important energy storage devices for modern power electronics. However, insulation performance dielectrics in capacitors will significantly deteriorate under conditions high temperatures electric fields, resulting limited capacitive performance. In this paper, we report a method to improve high-temperature polymer dielectric by incorporating an extremely low loading 0.5 wt% carbon quantum dots (CQDs) into fluorene polyester (FPE) polymer. CQDs possess electron affinity energy, enabling them capture migrating carriers exhibit unique Coulomb-blocking effect scatter electrons, thereby restricting migration. As result, breakdown strength properties CQD/FPE nanocomposites are enhanced. For instance, density at room temperature, efficiency (η) exceeding 90%, reached 9.6 J/cm

Language: Английский

Interface engineering of polymer composite films for high-temperature capacitive energy storage DOI
Yu Xiang, Rui Yang, Wenqi Zhang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154056 - 154056

Published: July 21, 2024

Language: Английский

Citations

10
Decoupling enhancements of breakdown strength and dielectric constant in PMIA-based composite films for high-temperature capacitive energy storage DOI
Wenqi Zhang, Xin Xu, Sidi Fan

et al.

Composites Part B Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 112013 - 112013

Published: Nov. 1, 2024

Language: Английский

Citations

6
Tailoring a dual crosslinking network in all-organic aramid composite film for superior high-temperature capacitive energy storage DOI
Wenqi Zhang,

Ding Ai,

Sidi Fan

et al.

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104180 - 104180

Published: March 1, 2025

Language: Английский

Citations

0
First-principles computational analysis of the electronic and charge transport anisotropy of NbOX2 (X = Cl, Br, I) nanoribbons and nanosheets DOI
Quanzhen Wan,

H.D. Zhou,

Rui Wang

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(22)

Published: June 2, 2025

The use of NbOX2 oxyhalide (X = Cl, Br, I) nanoribbons and nanosheets in next-generation nanoelectronic devices remains unfulfilled because the impact fundamental electronic properties these materials on their practical device applications poorly understood. present work applies first-principles density functional theory calculations to investigate anisotropic quantum confinement effects performance field effect transistors. Our results reveal direction-dependent electron transport behaviors, with most efficient occurring along Nb-X axis. Quantum leads bandgap widening, Nb–O-oriented exhibiting more stable properties. In addition, charge delocalization is confirmed axis, it strengthens increasing halogen constituent mass.

Language: Английский

Citations

0
Improved Energy Density at High Temperatures of FPE Dielectrics by Extreme Low Loading of CQDs DOI Open Access
Huan Wang, Hang Luo, Yuan Liu

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(14), P. 3625 - 3625

Published: July 22, 2024

Electrostatic capacitors, with the advantages of high-power density, fast charging-discharging, and outstanding cyclic stability, have become important energy storage devices for modern power electronics. However, insulation performance dielectrics in capacitors will significantly deteriorate under conditions high temperatures electric fields, resulting limited capacitive performance. In this paper, we report a method to improve high-temperature polymer dielectric by incorporating an extremely low loading 0.5 wt% carbon quantum dots (CQDs) into fluorene polyester (FPE) polymer. CQDs possess electron affinity energy, enabling them capture migrating carriers exhibit unique Coulomb-blocking effect scatter electrons, thereby restricting migration. As result, breakdown strength properties CQD/FPE nanocomposites are enhanced. For instance, density at room temperature, efficiency (η) exceeding 90%, reached 9.6 J/cm

Language: Английский

Citations

3