A5049815020- High voltage insulation and dielectric phenomena
- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Ferroelectric and Piezoelectric Materials
- Power Transformer Diagnostics and Insulation
- Synthesis and properties of polymers
- Polymer Nanocomposites and Properties
- Dendrimers and Hyperbranched Polymers
- Advanced Materials and Mechanics
- Surface Modification and Superhydrophobicity
- Electrical Fault Detection and Protection
Xi'an Jiaotong University
2017-2024
State Key Laboratory of Electrical Insulation and Power Equipment
2021-2023
Shaanxi Normal University
2007
3D structure assembly in advanced functional materials is important for many areas of technology. Here, a new strategy exploits IR light-driven bilayer polymeric composites autonomic origami structures. The sheet comprises passive layer poly(dimethylsiloxane) (PDMS) and an active comprising reduced graphene oxides (RGOs), thermally expanding microspheres (TEMs), PDMS. corresponding fabrication method versatile simple. Owing to the large volume expansion TEMs, two layers exhibit differences...
Polymer nanocomposites have higher energy storage density, much lower conductivity, and loss than the polymer matrices. The excellent performance may be originated from deep-level localized states introduced by interfacial zones between nanofillers However, essential relation composition, architecture, configuration of chains is still not clear. We investigate temperature dependences electrical conductivities three types find that they all obey Meyer-Neldel (MN) compensation rule prefactor...
Abstract Polymer dielectric capacitors are widely used as high-power-density energy storage devices. However, their density is relatively low and they cannot meet the requirements for high temperature resistant capacitors. In order to clarify key factors affecting performance improve efficiency synergistically, it urgent establish a unified model simultaneously study volt−ampere characteristics, space charge distribution, breakdown strength, discharged density, charge–discharge of linear...
Abstract Dielectric energy storage capacitors with excellent high temperature resistance are essential in fields such as aerospace and pulse power. However, common high‐temperature resistant polymers polyimide (PI) polyether sulfone have low densities efficiencies at temperature, which greatly limited practical applications. The polymer nanocomposites prepared by doping modification can regulate the charge injection transport process, improve performance. quantitative relationship between...
With the development of science and technology, polymer dielectric capacitors are widely used in energy, electronics, transportation, aerospace, many other areas. For energy storage to remain effective practical applications, excellent charge discharge performance is essential. However, common will deteriorate rapidly at high temperature, which makes them fail work efficiently under worse working conditions. Dielectric trap levels densities increase when nanoparticles incorporated into...
The development of direct current high-voltage power cables requires insulating materials having excellent electrically insulation properties. Experiments show that appropriate nanodoping can improve the breakdown strength polyethylene (PE) nanocomposites. Research indicates traps, free volumes, and molecular displacement are key factors affecting strength. This study comprehensively considered space charge transport, electron energy gain, chain long-distance movement during electrical...
Polypropylene is widely used in thin-film capacitors for its excellent electrical and chemical properties, while electric breakdown the key factor restricting improvement of energy storage density capacitors. Nanodoping an effective way to improve matrix performance, but effects aggregate structure, charge transport molecular displacement polymers on distribution shape parameter fields nanocomposites are still unclear. In this paper, parameters affected by structure extracted, carrier...
Polymer film capacitors are popular in many applications such as power systems, new energy vehicles and electromagnetic equipment. However, the face of higher working temperature density requirements, storage characteristics needs to be improved. The charge injection between electrode dielectric a key factor affecting capacitors. By depositing high insulating inorganic layer on polymer surface, electrode-dielectric interface can controlled, then modulated improve at temperature. But...
Abstract Polyetherimide (PEI) has excellent thermal and electrical properties, is widely used as a dielectric material for high-temperature high-power film capacitors in power systems, new energy vehicles other fields. However, the operating temperature increases, conductivity increases breakdown strength decreases, reducing storage density of significantly limiting practical applications. To clarify influencing mechanism high on properties performance dielectrics, this paper establishes...
With the development of science and technology, polymer dielectric capacitors are widely used in energy, electronics, transportation, aerospace, many other areas. For energy storage to remain effective practical applications, excellent charge discharge performance is essential. However, common will deteriorate rapidly at high temperature, which makes them fail work efficiently under worse working conditions. Dielectric trap levels densities increase when nanoparticles incorporated into...