通过层叠聚合物中的分子互穿接口实现了超级容量储能
Liang Sun1, Fengyuan Zhang1, Li Li1,2
1Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
Advanced materials (Deerfield Beach, Fla.)
|December 3, 2024
概括
研究人员使用设计的分子互透接口开发了先进的聚合物介电材料. 这一突破提高了能量密度 (Ue) 和电荷-放电效率 (η),为更好的电能存储应用.
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
- 电气工程 电气工程
背景情况:
- 聚合物介电材料对于电子和电力系统至关重要,但由于低介电常数 (K) 和逆K-分解强度 (Eb) 关系,其能量密度 (Ue) 较低.
- 传统的分层聚合物在同时提高介电性质和机械强度,同时防止电导方面存在局限性.
研究的目的:
- 为具有高能量密度 (Ue) 和电荷-放电效率 (η) 的全有机介电聚合物提供可扩展的方法.
- 通过设计分子相互透的接口来克服传统分层聚合物的局限性.
主要方法:
- 在全有机介电聚合物中利用设计的分子互穿接口.
- 在实验和理论上研究了独特的分子间相互作用和微观结构变化.
- 制造的大面积薄膜具有高均性和电容稳定性.
主要成果:
- 实现了介电反应 (K) 和机械强度的同时改进.
- 抑制电导,这是传统聚合物的关键挑战.
- 获得的高能量密度 (Ue) 为22.89 J cm−3,电荷-放电效率 (η) ≥90%.
- 在50万个周期中表现出卓越的电容稳定性.
结论:
- 分子相互透的接口为高性能聚合物介电材料提供了一个新的策略.
- 开发的材料显著优于当前用于储存电能的层叠聚合物介电材料.
- 这种方法为可扩展的高UE聚合物介电材料提供了一条实用的途径.
相关概念视频
MOS Capacitor
707
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
707
Energy Stored in Capacitors
435
A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
435
Dielectric Polarization in a Capacitor
4.6K
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...
4.6K
Capacitors and Capacitance
7.5K
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
7.5K


