相关实验视频

Updated: Apr 11, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

在150°C的超高容量储能密度,通过填充剂和结构设计在聚乙胺复合膜中实现

Yan Guo¹, Weichen Zhao¹, Da Li¹

¹Electronic Materials Research Laboratory & Multifunctional Materials and Structures, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China.

Advanced materials (Deerfield Beach, Fla.)

|December 16, 2024

概括

使用BNKT-BST/PEI纳米复合材料开发了高性能聚合物介电材料. 这些材料具有出色的热稳定性和能量储存,对于要求高的电子应用至关重要.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
陶制品在陶方面.

背景情况:

聚合物介电材料对于电子产品至关重要,需要高热稳定性和用于先进应用的能量储存.
现有的聚合物介电材料在满足高温电子系统的需求方面面临着挑战.
开发具有增强介电性质和热弹性材料至关重要.

研究的目的:

为了合成和描述用于高温介电应用的新型BNKT-BST/PEI纳米复合材料.
为了研究纳米粒子结合和多层结构对介电性质的影响.
评估开发的纳米复合材料的储能密度和充/放电效率.

主要方法:

固体相反应方法用于制备0.55Bi0.5(Na0.84K0.16) 0.5TiO3-0.45(Bi0.1Sr0.85) TiO3 (BNKT-BST) 陶.
制造具有各种结构的BNKT-BST/PEI纳米复合材料,包括三明治架构.
介电常数 (ɛr),分解场强度 (Eb),放电能量密度 (Ud) 和充/放电效率 (η) 的表征.

主要成果:

这种三明治结构的BNKT-BST/PEI纳米复合材料实现了7.7 J cm−3的放电能量密度 (Ud),在650 MV m−1和150 °C下达到80.2%的效率 (η).
纳入BNKT-BST纳米粒子和多层设计显著提高了复合材料的介电常数 (ɛr) 和分解场强度 (Eb).
观察到出色的循环稳定性, Ud ≈ 4.7 J cm−3 和 η > 90% 在 500 MV m−1 和 150 °C.

结论:

BNKT-BST/PEI纳米复合材料,特别是三明治结构,提供高能量储存密度和优异的热稳定性.
这些材料对高温电子系统中聚合物介电物的实际应用具有前景.
这项研究表明,开发用于未来电子设备的先进介电材料是一个可行的途径.

关键词:

在BNKT-BST/PEI纳米复合材料中.充电/放电效率的提高排放的能量密度排放的能量密度在高温的高温环境下.

更多相关视频

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance

Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance

Published on: November 30, 2022

相关概念视频

Energy Stored in a Capacitor: Problem Solving

Energy Stored in a Capacitor: Problem Solving

In 1749, Benjamin Franklin coined the word battery for a series of capacitors connected to store energy. Capacitors store electric potential energy that can be released over a short time. This property means capacitors have a wide range of applications.
Capacitor-discharge ignition is a type of ignition system commonly found in small engines where the energy released from a capacitor ignites an induction coil that, in turn, fires the spark plug.
To calculate the energy stored in a capacitor of...

Capacitor With A Dielectric

Capacitor With A Dielectric

Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...

Dielectric Polarization in a Capacitor

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...