一种极极化度高的缩双极玻璃,用于超高能储能
Jian Fu1, Aiwen Xie2, Ruzhong Zuo3,4
1School of Materials Science and Engineering, Hefei University of Technology, Hefei, China.
Nature communications
|August 26, 2024
概括
这项研究在高陶中引入了一种新的二极管玻璃,用于先进的介电电容. 它实现了高能量密度和效率,克服了以前储能材料的限制.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 陶工程 陶工程 陶工程
背景情况:
- 放松铁电对于脉冲动力介电电容器至关重要.
- 一个关键的挑战是在高电场下平衡能量密度和效率.
研究的目的:
- 为高性能介电电容器开发一种新的材料概念.
- 克服能量密度和储能材料的效率之间的权衡.
主要方法:
- 高陶的设计与一个缩的二极管玻璃结构.
- 替换多个异质铁电活性.
- 原子尺度极极异质和双极行为的表征.
主要成果:
- 在散装陶中实现了优越的可回收能量密度 (~15.9 J/cm3) 和效率 (~93.3%).
- 在多层陶电容器中证明了创纪录的能量密度 (~26.3 J/cm3) 和效率 (~92.4%).
- 呈现出极好的温度和循环稳定性.
结论:
- 缩二极管玻璃概念为设计高性能介电电容器提供了一种独特的方法.
- 这种材料设计克服了脉冲动力应用的能量密度和效率的限制.
- 这些发现为下一代储能设备铺平了道路.
相关概念视频
Potential Due to a Polarized Object
372
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
372
Induced Electric Dipoles
4.2K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.2K
Molecular Shape and Polarity
59.8K
Dipole Moment of a Molecule
59.8K
Intermolecular Forces
58.0K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
58.0K
Bond Polarity, Dipole Moment, and Percent Ionic Character
28.6K
Bond Polarity
28.6K


