A5041602394- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- High voltage insulation and dielectric phenomena
- Ferroelectric and Piezoelectric Materials
- Conducting polymers and applications
- Rock Mechanics and Modeling
- Lightning and Electromagnetic Phenomena
- Electrostatic Discharge in Electronics
- Electromagnetic wave absorption materials
- Acoustic Wave Resonator Technologies
- Drilling and Well Engineering
- Tunneling and Rock Mechanics
- Magnetism in coordination complexes
- Polymer Nanocomposite Synthesis and Irradiation
- Computational Drug Discovery Methods
- Mechanical and Optical Resonators
- Electron Spin Resonance Studies
- Seismic Imaging and Inversion Techniques
- Synthesis and properties of polymers
- Electrohydrodynamics and Fluid Dynamics
- Polymer Nanocomposites and Properties
- Plasma Diagnostics and Applications
- Power Transformer Diagnostics and Insulation
- Advanced NMR Techniques and Applications
- Fuel Cells and Related Materials
Tsinghua University
2016-2025
University of Wisconsin–Madison
2024-2025
Wuhan Institute of Technology
2025
Ministry of Water Resources of the People's Republic of China
2022-2024
Changjiang Water Resources Commission
2023-2024
Pennsylvania State University
2023
Jilin University
2010
Tiangong University
2008
Abstract Dielectric polymers for electrostatic energy storage suffer from low density and poor efficiency at elevated temperatures, which constrains their use in the harsh-environment electronic devices, circuits, systems. Although incorporating insulating, inorganic nanostructures into dielectric promotes temperature capability, scalable fabrication of high-quality nanocomposite films remains a formidable challenge. Here, we report an all-organic composite comprising blended with...
Abstract Polymer dielectrics such as poly(vinylidene fluoride) (PVDF) have drawn tremendous attention in high energy density capacitors because of their dielectric constant and ease processing. However, the discharged attained with these materials is restrained by inferior breakdown strength electric resistivity. Herein, PVDF composite films a nanosized interlayer assembled boron nitride nanosheets (BNNSs) that aligned along in‐plane direction are prepared through simple layer‐by‐layer...
Many mainstream dielectric energy storage technologies in the emergent applications, such as renewable energy, electrified transportations and advanced propulsion systems, are usually required to operate under harsh-temperature conditions. However, excellent capacitive performance thermal stability tend be mutually exclusive current polymer materials applications. Here, we report a strategy tailor structural units for design of high-temperature dielectrics. A library polyimide-derived...
Abstract Dielectric capacitors are essential components of advanced high‐power electrical and electronic systems for energy storage. The drastic reductions in the density charge‐discharge efficiency dielectric polymers at elevated temperatures, owing to sharply increased conduction, remain a major challenge. While substantial progress has been made enhancing high‐temperature capacitive performance polymers, improvement rather limited when temperature exceeds 150 °C. Here, universal approach...
Polymer dielectrics need to operate at high temperatures meet the demand of electrostatic energy storage in modern electronic and electrical systems. The polymer nanocomposite approach, an extensively proved strategy for performance improvement, encounters a bottleneck reduced density poor discharge efficiency beyond 150 °C. In this work, polymer/metal oxide cluster composite prepared based on "site isolation" is reported. Capitalizing quantum size effect, bandgap surface defect states...
Adv. Energy Mater. 2019, 9, 1901826 DOI: 10.1002/aenm.201901826 On page 3, the Weibull statistical distribution formula is incorrect, corrected version is, P E = 1 − exp / b β 4, Figure S4 erroneously referenced. The relevant sentences are to, “The high electric field energy storage performance was then assessed with D-E (electric displacement as a function of field) loop measurement (Figure S3, Supporting Information)” “For instance, under 320 MV m−1, while PVDF has Pr 0.03 C m−2, composite...
Abstract This paper reports an unpredictable insulation surface flashover phenomenon triggered by charge clusters under DC electric field, which is experimentally revealed a donut-shaped dust cluster figure, presenting the outline of these and showing hollow structure interestingly. The randomly formed when ions originating from local micro-protrusions accumulate on surface, edge produces strong electrical field to induce streamers. These streamers provide inducing factor, unpredictably...
A hierarchical nanostructure as a new design of nanofillers is demonstrated for high-energy-density dielectric polymer nanocomposites.
Grafting modification is an effective method to enhance the electrical characteristics of polymeric materials by establishing deep traps that prevent carriers from being injected and transmitted. However, grafted polymers for insulation suffer large leakage current at elevated temperatures, limiting their application in harsh environments. We report itaconic anhydride polypropylene synthesized solution grafting preserves excellent insulating properties up 120 °C. It demonstrated restrains...
Polypropylene is considered to be the material of choice for environmentally friendly high voltage direct current cable insulation. The power transmission electrical energy exposes insulating materials temperatures and electric fields, resulting in degradation properties. This paper reports that organic molecular semiconductors with strong electron affinity can effectively modulate properties polypropylene. charge injection transport process are analyzed by considering a combination...
Introducing deep traps by grafting functional groups on molecular chains of polymeric dielectric materials has been proved as an effective way to improve their electrical properties, especially suppressing the space charge injection and accumulation. However, underlying physical mechanism origins effects properties dielectrics not fully understood. In order explore in grafted polymers, both simulations electronic band structures well 3D electric potential distributions at level experiments...
Dielectric polymers for electrostatic energy storage are used in modern electronic and electrical systems, their performance can be significantly enhanced through doping with ultralow content nanofillers to improve performance. Understanding the underlying physical mechanisms of polymer nanocomposites is essential designing high-performance dielectric polymers. This paper presents a conduction model that integrates Richardson–Schottky emission hopping describe charge injection transport...
We reported a novel “Y”-shaped Mn III 5 Dy 3 complex with SMM behavior, and found that the U cal value of individual is highest when electrostatic potentials from two sides its equatorial plane are completely equivalent to each other.
There are a large number of abandoned coalmines in China, and most them located around major coal-fired power stations, which the largest emission sources carbon dioxide (CO2). Considering injection CO2 into coalmines, usually flooded condition, it is necessary to investigate effect CO2–water–coal interaction on minerals pore structures at different pressures, temperatures times. It reveals that can significantly improve solubility Ca, S, Mg, K, Si, Al, Fe Na. By comparing mineral content...
Attaining compact energy storage under extreme temperature conditions is of paramount importance in the development advanced dielectric materials. The polymer composite approach has proved effective towards this goal, and addressing correlation between filler distribution electrical properties foremost designing dielectrics, especially multifiller systems. Here, design a bi-gradient using an integrated framework based on phase field model reported. This can predict charge-inhibiting behavior...