电容器
材料科学
电介质
聚合物
储能
电势能
热稳定性
介电常数
工程物理
复合材料
光电子学
电气工程
电压
能量(信号处理)
热力学
化学工程
物理
工程类
功率(物理)
量子力学
作者
Minzheng Yang,Weibin Ren,Mengfan Guo,Yang Shen
出处
期刊:Small
[Wiley]
日期:2022-10-20
卷期号:18 (50)
被引量:34
标识
DOI:10.1002/smll.202205247
摘要
Polymer dielectrics are key components for electrostatic capacitors in energy, transportation, military, and aerospace fields, where their operation temperature can be boosted beyond 125 °C. While most polymers bear poor thermal stability and severe dielectric loss at elevated temperatures, numerous linear polymers with linear D-E loops and low dielectric permittivity exhibit low loss and high thermal stability. Therefore, the broad prospect of electrostatic capacitors under extreme conditions is anticipated for linear polymers, along with intensive efforts to enhance their energy density with high efficiency in recent years. In this article, an overview of recent progress in linear polymers and their composites for high-energy-density electrostatic capacitors at elevated temperatures is presented. Three key factors determining energy storage performance, including polarization, breakdown strength, and thermal stability, and their couplings are discussed. Strategies including chain modulation, filler selection, and design of topological structure are summarized. Key parameters for electrical and thermal evaluations of polymer dielectrics are also introduced. At the end of this review, research challenges and future opportunities for better performance and industrialization of dielectrics based on linear polymers are concluded.
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