A5068044774- Dielectric materials and actuators
- Ferroelectric and Piezoelectric Materials
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Synthesis and properties of polymers
- Advancements in Battery Materials
- MXene and MAX Phase Materials
- Graphene research and applications
- Advanced Battery Materials and Technologies
- Polydiacetylene-based materials and applications
- Polymer crystallization and properties
- Supercapacitor Materials and Fabrication
- High voltage insulation and dielectric phenomena
- Synthetic Organic Chemistry Methods
- Aerogels and thermal insulation
- Polymer composites and self-healing
- Electrostatic Discharge in Electronics
- Ultrasound and Hyperthermia Applications
- Polymer Nanocomposites and Properties
- Microwave Dielectric Ceramics Synthesis
- Fuel Cells and Related Materials
Tsinghua University
2020-2025
Wenzhou University
2023
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...
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...
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...
Abstract The growing need for high‐power and compact‐size energy storage in modern electronic electrical systems demands polymer film capacitors with excellent temperature capability. However, conventional dielectrics feature dramatic deterioration capacitive performance under concurrent high electric field because the thermal stability traditionally relies on conjugated, planar molecular segments chains. Herein, inspired by stable double helix structures of deoxyribonucleic acid,...
Abstract MXenes are mentioned in many applications due to their unique properties. However, the traditional etching method has a lengthy synthesis time, dangerous process, and high cost. Molten salt is not only short time but also safe simple, laying good foundation for industrialization. Here, we compare F‐containing with molten method. Transmission electron microscopy elemental mapping images X‐ray photoelectron spectroscopy show that Ti 3 C 2 T x surface end of terminated by –F, while...
Intrinsic self-healing of internal damage in mechanically robust polymers is achieved through a convertible molecular network, which can be switched reversibly between fully-crosslinked and partially-crosslinked states.
Ceramic capacitors are ubiquitously used in high power and pulse applications, but their low energy density, especially at temperatures (>150 °C), limits fields of application. One the reasons is efficiency under electric and/or temperatures. In this work, equimolar Sm3+ Ti4+ cations were doped NaNbO3 to increase relaxor characteristics storage properties. The optimal recoverable density Wrec 6.5 J/cm3 η 96% attained ceramics with 10% (Sm, Ti) concentration (SmT10). Dense...
Abstract Recently, demands for high‐performance polymer film capacitors at elevated temperatures have become more urgent. High dielectric constant is essential materials to achieve substantial energy density relatively low electric fields, which of great significance practical applications, while improving the permittivity high‐temperature dielectrics without a remarkable deterioration in other electrical properties still remains challenge. Here, nanocomposite containing z‐aligned high‐k...
This paper reports excellent electrical properties in polypropylene modified by grafting with methyl acrylate (PP-g-Met) and the related mechanism of enhanced properties. The crystal PP-g-Met were analyzed. influences on microstructure such as space charge accumulation, breakdown strength, DC conductivity studied. Compared pure PP, exhibits remarkably suppressed injection, strength reduced conduction current. enhancing can be explained that abundant deep traps are introduced introduction...
The increasing demand for polymer dielectrics in different scenarios, such as electrical insulation cable, requires elevated and mechanical properties. In order to understand the relationship between properties structure of grafted monomers a polypropylene (PP) system, design framework based on transfer-learning method has been proposed designing side chain PP system. 22 samples polypropylene-grafted are synthesized. Through well-trained multi-layer perceptron model predicting glass...
MXenes are mentioned in many applications due to their unique properties. However, the traditional etching method has a long synthesis time, dangerous process and high cost. Molten salt is not only short but also safe simple, laying good foundation for industrialization. Here, we compare F–containing with molten method. TEM elemental mapping images XPS show that Ti3C2Tx surface end of terminated by –F, while –Cl. Finally, sodium–ion batteries fabricated performance difference three methods...
Abstract Recently, demands for high-performance polymer film capacitors at elevated temperatures have become more urgent. High dielectric constant is essential materials to achieve substantial energy density relatively low electric fields, which of great significance practical applications, while improving the permittivity high-temperature dielectrics without a remarkable deterioration in other electrical properties still remains challenge. Here, nanocomposite containing z-aligned high-k...