Feng Mengjia, Zhang Tiandong, Song Chunhui, Zhang Changhai, Zhang Yue, Feng Yu, Chi Qingguo, Chen Qingguo, Lei Qingquan
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China.
School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China.
Polymers (Basel). 2020 Aug 31;12(9):1972. doi: 10.3390/polym12091972.
Improving the energy storage density of dielectrics without sacrificing charge-discharge energy storage efficiency and reliability is crucial to the performance improvement of modern electrical and electronic systems, but traditional methods of doping high-dielectric ceramics cannot achieve high energy storage densities without sacrificing reliability and storage efficiency. Here, an all-organic energy storage dielectric composed of ferroelectric and linear polymer with a sandwich structure is proposed and successfully prepared by the electrostatic spinning method. Additionally, the effect of the ferroelectric/linear volume ratio on the dielectric properties, breakdown, and energy storage is systematically studied. The results show that the structure has good energy storage characteristics with a high energy storage density (9.7 J/cm) and a high energy storage efficiency (78%). In addition, the energy storage density of the composite dielectric under high energy storage efficiency (90%) is effectively improved (25%). This result provides theoretical analysis and experience for the preparation of multilayer energy storage dielectrics which will promote the development and application of energy storage dielectrics.
在不牺牲充放电储能效率和可靠性的前提下提高电介质的储能密度，对于现代电气和电子系统的性能提升至关重要，但传统的掺杂高介电陶瓷的方法在不牺牲可靠性和储能效率的情况下无法实现高储能密度。在此，提出了一种由铁电体和线性聚合物组成的具有三明治结构的全有机储能电介质，并通过静电纺丝法成功制备。此外，系统研究了铁电体/线性聚合物体积比对介电性能、击穿和储能的影响。结果表明，该结构具有良好的储能特性，储能密度高（9.7 J/cm³）且储能效率高（78%）。此外，在高储能效率（90%）下复合电介质的储能密度得到有效提高（25%）。该结果为多层储能电介质的制备提供了理论分析和经验，将推动储能电介质的发展与应用。
