In-situ crosslinked polyetherimide/BNNS composites with ultrahigh charged-discharged efficiency at high temperature

• Published in: Composites. Part A, Applied science and manufacturing Vol. 175; p. 107829
• Main Authors: Liu, Zheng, Wang, Tianze, Zhu, Lixue, Jiang, Zhenhua, Zhang, Yunhe
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2023
• Subjects: A. Polymer-matrix composites; A. Thin films; B. Thermal properties; Capacitive energy storage; Capacitive energy storage; A. Polymer-matrix composites; A. Thin films; B. Thermal properties
• ISSN: 1359-835X; 1878-5840
• DOI: 10.1016/j.compositesa.2023.107829

High performance dielectric polymer composites for capacitive energy storage have been a hot topic in recent years. However, dielectric materials tend to breakdown at high temperature, and its charged-discharged efficiency is greatly reduced. Therefore, preparing high-efficient high-temperature dielectric material is the main challenge in this field. In this work, based on the synergistic effect of in-situ composite and controlled thermal cross-linking, the thermal conducting nano filler and crosslinking system composite has ultra-high charged-discharged efficiency at high temperature. It is proved that the addition amount of BNNS for the peak performance of this kind of composite is 10 vol% and the discharge energy density is 4.58 J/cm3 and the charged-discharged efficiency reaches 96 % at 150 °C and 500 MV/m. At 200 °C and 300 MV/m, these are 1.76 J/cm3 and astonishing 95 %. It is expected to be a candidate for a new generation of high temperature resistant dielectric materials.