文献类型：期刊文献

英文题名：Excellent high-temperature energy storage capacity for polyetherimide nanocomposites with hierarchically structured nanofillers

作者：Yuan, You[1];Wang, Xinhua[1];Ni, Xinyao[1];Qian, Jun[1];Zuo, Peiyuan[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：175

外文期刊名：COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

收录：;EI(收录号：20233814751103);WOS:【SCI-EXPANDED(收录号:WOS:001081335800001)】；

基金：All authors are grateful for financial support from the National Natural Science Foundation of China (52073091, 52373073, 52303083, 22171086) , Shanghai Pujiang Program (22PJ1402500) and the Key Laboratory of Advanced Polymer Materials of Shanghai.

语种：英文

外文关键词：A. Hybrid; A. Polymer-matrix composites (PMCs); B. Electrical properties; B. High-temperature properties

摘要：High-temperature electronic power systems need reliable dielectric energy storage materials, but conductive losses in extreme conditions impair their performance. Hierarchically-structured fillers are promising to not only integrate the benefits of diverse components but also effectively utilize interface engineering and electron scattering effects to optimize dielectric and breakdown properties, thereby modulating energy storage performance in polymer-based composites. In this work, we successfully fabricated hierarchical nanofillers comprising 2D boron nitride nanosheets (BNNS) and 0D ultrafine strontium titanate (ST) nanoparticles. The paraelectric ceramic ultrafine ST possesses a high dielectric constant and low residual polarization, which enhances the energy storage density of composite materials while ensuring high conversion efficiency. The PEI-based nano-composites loaded with hierarchical BNNS@ST nanofillers attain remarkable discharged energy density (4.29 J cm(-3)) and charging and discharging efficiency (eta > 80%) at 150 degrees C. This approach utilizing hierarchically-structured nanofillers offers a feasible strategy to explore high-energy-density polymer dielectrics applied in extreme environments.